^a Powertrain control module controlled.

Shift Solenoid Failure Mode Charts

Shift Control Solenoid Failure Always OFF

Failed OFF due to powertrain control module and/or vehicle wiring concerns; solenoid electrically or hydraulically stuck OFF.

Shift Solenoid 1 ALWAYS OFF

Powertrain Control Module Gear Commanded	Position Selected: Overdrive	Position Selected: 2	Position Selected: 1
	Actual Gear Obtained
1	4	2	1
2	3	2	2
3	3	2	2
4	4	2	2

Shift Solenoid 2 ALWAYS OFF

Powertrain Control Module Gear Commanded	Position Selected: Overdrive	Position Selected: 2	Position Selected: 1
	Actual Gear Obtained
1	1	2	1
2	1	2	1
3	4	2	2
4	4	2	2

Shift Control Solenoid Failure Always ON

Failed ON due to powertrain control module and/or vehicle wiring concerns; solenoid electrically or hydraulically stuck ON.

Shift Solenoid 1 ALWAYS ON

Powertrain Control Module Gear Commanded	Position Selected: Overdrive	Position Selected: 2	Position Selected: 1
	Actual Gear Obtained
1	1	2	1
2	2	2	1
3	2	2	1
4	1	2	1

Shift Solenoid 2 ALWAYS ON

Powertrain Control Module Gear Commanded	Position Selected: Overdrive	Position Selected: 2	Position Selected: 1
	Actual Gear Obtained
1	2	2	1
2	2	2	1
3	3	2	2
4	3	2	2

 

A1 E4OD ELECTRONIC DIAGNOSTICS

• Check to make sure the transmission harness connector is fully seated, terminals are fully engaged in connector and in good condition before proceeding.
• Connect Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent.
• Perform KOEO test until continuous memory DTC have been displayed.
• Enter Output State Diagnostic Test Mode (DTM). Refer to Special Test Modes in this section.
• Depress throttle to wide-open throttle (WOT) and release.

Yes	No
REMAIN in Output State DTM. GO to A2.	DEPRESS throttle and release. If vehicle did not enter Output State DTM, REFER to Powertrain Control/Emissions Diagnosis Manual OBDI or OBDII.

 

A2 CHECK ELECTRICAL SIGNAL OPERATION

 CAUTION: Remove heat shield from transmission before removing connector. Remove solenoid body connector by pushing on center tab and pulling on wiring harness. Do not attempt to pry tab with a screwdriver. Reinstall heat shield after service.

NOTE: Refer to the schematic and charts preceding this pinpoint test.

• Disconnect transmission connector.
• Using a mirror, inspect both ends of connector for damaged or pushed out pins, corrosion, loose wires, and missing or damaged seals.
• Connect a volt-ohmmeter positive lead to vehicle power (VPWR) circuit and negative test lead to solenoid circuit of transmission vehicle harness connector.
• Place volt-ohmmeter on 20-volt scale.
• While observing volt-ohmmeter, depress and release throttle to cycle solenoid output On and Off.

Yes	No
GO to A5.	GO to A3.

 

A3 CHECK CONTINUITY OF SOLENOID SIGNAL AND VEHICLE POWER HARNESS CIRCUITS

• Turn ignition switch off.
• Make sure harness transmission connector is disconnected.
• Disconnect powertrain control module. Inspect for damaged or pushed out pins, corrosion, or loose wires.
• Install Rotunda EEC-IV 60-Pin Breakout Box 014-00322, or EEC-V 104-Pin Breakout Box 014-00950 or equivalent. Leave powertrain control module disconnected.

NOTE: Refer to the schematic and charts preceding this pinpoint test.

• Measure resistance between appropriate powertrain control module signal test pin at Breakout Box and signal pin at transmission harness connector.
• Measure resistance between appropriate powertrain control module power test pins at Breakout Box and power pin at transmission harness connector.

Yes	No
GO to A4.	SERVICE open circuit(s). REMOVE Breakout Box. RECONNECT all components. REPEAT Quick Test.

 

A4 CHECK SOLENOID HARNESS FOR SHORTS TO POWER AND GROUND

• Make sure Breakout Box is installed and powertrain control module is disconnected.
• Ensure transmission harness connector is disconnected.

NOTE: Refer to the schematic and charts preceding this pinpoint test.

• Measure resistance between appropriate powertrain control module signal output pin and power test pins at Breakout Box.
• Measure resistance between appropriate PCM signal output pin and ground test pins at Breakout Box and chassis ground.

Yes	No
GO to A5.	SERVICE short circuit. REMOVE Breakout Box. RECONNECT all components. REPEAT Quick Test.

 

A5 SOLENOID FUNCTIONAL TEST

• Ensure that the vehicle harness is disconnected at the transmission connector.
• Install Rotunda Transmission Tester 007-00085 and Cable and Overlay 007-00107 or equivalents.
• Using tests outlined under Static Testing — Engine Off, perform the Solenoid Voltage Test.

NOTE: LED will turn green when solenoid activates and turn off when deactivated. LED will turn red if activated solenoid is shorted to B+. LED will remain off if an activated solenoid is shorted to ground or no continuity.

Yes	No
GO to A6.	GO to A7.

 

A6 TRANSMISSION DRIVE TEST

• Reconnect PCM.
• Perform Dynamic Testing — Engine On procedures.

Yes	No
ERASE all codes and PERFORM Transmission Drive Cycle Test in this section. REPEAT Quick Test.	GO to A7.

 

A7 CHECK RESISTANCE OF SOLENOID

• Bench/Drive switch in BENCH mode.
• Rotate gear selector switch to OHMS CHECK position.
• Connect a volt-ohmmeter negative lead to the SS-1 jack and positive lead to vehicle power jack on tester. This is to test shift solenoid 1.
• Record resistance.
• Connect a volt-ohmmeter negative lead to the SS-2 jack and positive lead to the vehicle power jack on tester. This is to test shift solenoid 2.

Yes	No
GO to A8.	REPLACE solenoid body assembly. RECORD and ERASE codes. REPEAT Quick Test.

 

A8 CHECK SOLENOID FOR SHORT TO GROUND

• Check for continuity between BAT- (engine ground) and appropriate jack with a digital volt-ohmmeter or other low current tester (less than 200 milliamps).
• Connection should show infinite resistance (no continuity).

Yes	No
REPLACE solenoid body assembly. RECORD and ERASE codes. REPEAT Quick Test.	GO to Diagnosis by Symptom.

 

PINPOINT TEST B: TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR

 

Diagnostic Trouble Codes:

• 636, P1711 — TFT Sensor Out of On-Board Diagnostics Range
• 637, 638, P0712, P0713 — TFT Sensor Circuit Open/Grounded
• 657, P1783 — Transmission Overtemp Indicated (149°C [300°F])

NOTE: This pinpoint test is designed to diagnose the Transmission Fluid Temperature Sensor electrical system ONLY. To prevent replacement of good components, note that the following areas may be at fault:

• Engine — Cooling
• Electrical — Battery, wiring harnesses
• Transmission — Internal transmission components, cooling, fluid

This pinpoint test is designed to diagnose the following components:

• Transmission Wiring Harness, Transmission Fluid Temperature Sensor (TFT Sensor), Signal Return (SIG RTN).
• Powertrain Control Module.

Refer to the following schematic and charts when performing the pinpoint test steps.

Transmission Vehicle Harness Connector Pin Identification

TEST PIN IDENTIFICATION

Circuit	PCM Pin Number
	EEC-V	EEC-IV 5.8L 0/8,500 GVW 7.5L 0/14,000 GVW
TFT	37	42
SRTN	91	46

TFT = Transmission Fluid Temperature.

SRTN = Sensor Signal Return.

 

B1 E4OD ELECTRONIC DIAGNOSIS

• Check to make sure transmission harness connector is fully seated, terminals are fully engaged in connector and in good condition before proceeding.

Yes	No
GO to B2.	PERFORM checks. ERASE codes. REPEAT Quick Test.

 

B2 CHECK ELECTRICAL SIGNAL OPERATION

• Turn ignition switch off.
• Disconnect transmission connector.

 CAUTION: Remove heat shield from transmission before removing connector. Remove solenoid body connector by pushing on center tab and pulling on wiring harness. Do not attempt to pry tab with a screwdriver. Reinstall heat shield after service.

• Using a mirror, inspect both ends of connector for damaged or pushed out pins, corrosion, loose wires, and missing or damaged seals.

NOTE: Refer to the schematic and chart preceding this pinpoint test.

• Connect a volt-ohmmeter positive test lead to transmission fluid temperature sensor circuit and negative test lead to Signal Return (SIG RTN) circuit of transmission harness connector.
• Place volt-ohmmeter on 20-volt scale.
• Turn key on, engine off.

Yes	No
GO to B6.	GO to B3.

 

B3 CHECK CONTINUITY OF TRANSMISSION FLUID TEMPERATURE SENSOR AND SIGNAL RETURN CIRCUITS

• Turn ignition switch off.
• Make sure that the vehicle harness is disconnected at the transmission connector.
• Disconnect powertrain control module. Inspect for damaged or pushed out pins, corrosion or loose wires.
• Install Rotunda EEC-IV 60-Pin Breakout Box 014-00322 or EEC-V 104-Pin Breakout Box 014-00950 or equivalent. Leave powertrain control module disconnected.

NOTE: Refer to the schematic and chart preceding this pinpoint test.

• Measure resistance between appropriate powertrain control module signal test pin at Breakout Box and signal pin at transmission harness connector.
• Measure resistance between appropriate powertrain control module signal return test pin at Breakout Box and signal return pin at transmission harness connector.

Yes	No
GO to B4.	SERVICE open circuit(s). REMOVE Breakout Box. RECONNECT all components. ERASE codes. REPEAT Quick Test.

 

B4 CHECK TRANSMISSION FLUID TEMPERATURE SENSOR CIRCUIT FOR SHORT TO VEHICLE POWER AND GROUND

• Turn ignition switch off.
• Make sure transmission harness connector is disconnected.
• Disconnect powertrain control module. Inspect for damaged or pushed out pins, corrosion or loose wires.
• Install Rotunda EEC-IV 60-Pin Breakout Box 014-00322, or EEC-V 104-Pin Breakout Box 014-00950 or equivalent. Leave powertrain control module disconnected.

NOTE: Refer to the schematic and chart preceding this pinpoint test.

• Measure resistance bewteen appropriate TFT signal test pin and ground test pins and chassis ground.
• Measure resistance between appropriate TFT signal test pin and power test pins at Breakout Box.

Yes	No
GO to B5.	SERVICE short circuit. REMOVE Breakout Box. RECONNECT all components. ERASE codes. REPEAT Quick Test.

 

B5 CHECK RESISTANCE OF TRANSMISSION FLUID TEMPERATURE SENSOR/HARNESS

• Make sure that the vehicle harness is disconnected at the transmission connector. Install Rotunda Transmission Tester 007-00085 and Cable and Overlay 007-00107 or equivalents to transmission connector.
• Set Bench/Drive switch to BENCH mode. Rotate gear selector switch to OHMS/DIODE CHECK position.
• Connect a volt-ohmmeter negative lead to TFT- jack and positive lead to TFT+ jack on tester.
• Perform Tests 1 and 2.

NOTE: While performing Tests 1 and 2 observe resistances.

• Code P0713/637 is set if resistance value exceeds 869K ohms (open circuit).
• Code P0712/638 is set if resistance value falls below 597 ohms (short circuit).





• TEST 1
• Record resistance.
• Resistance should be approximately in the following ranges:




TRANSMISSION FLUID TEMPERATURES

°C	°F	Resistance (Ohms)
(-)40-(-)20	(-)40-(-)4	967k-248k
(-)19-(-)1	(-)3-31	248k-100k
0-20	32-68	100k-37k
21-40	69-104	37k-16k
41-70	105-158	16k-5k
71-90	159-194	5k-2.7k
91-110	195-230	2.7k-1.5k
111-130	231-266	1.5k-0.8k
131-150	267-302	0.8k-0.54k



• TEST 2
• Check for intermittent short or open.
• If resistance was between 0.8k and 100k ohms, perform following test:
• If transmission is cold, start and run engine until transmission reaches its normal operating temperature. If transmission is warm, allow to cool.
• Check transmission fluid temperature sensor resistance again.
• Compare resistance with initial resistance. Resistance should decrease if transmission was warmed and should increase if transmission was allowed to cool. If correct change in resistance occurs, repeat Quick Test.

Yes	No
GO to B6.	REPLACE solenoid assembly. RECORD and ERASE codes. REPEAT Quick Test.

 

B6 CHECK TRANSMISSION FLUID TEMPERATURE SENSOR FOR SHORT TO GROUND

• Check for continuity between engine ground (BAT-) and appropriate jack (TFT- or TFT+) using a volt-ohmmeter or other low current tester (less than 200 milliamps).
• Connection should show infinite resistance (no continuity).

Yes	No
REPLACE solenoid assembly. REPEAT Quick Test.	REPEAT Quick Test. If codes are present and overtemp condition existed, CHECK fluid condition. CHECK overheat condition under Diagnosis by Symptom. SERVICE as required. REPEAT Quick Test.

 

PINPOINT TEST C: TORQUE CONVERTER CLUTCH (TCC) SOLENOID

 

Diagnostic Trouble Codes:

• 629, P0743 — Torque Converter Clutch Solenoid Circuit Failure
• P1743, P1742 — Torque Converter Clutch Solenoid Failure

NOTE: This pinpoint test is designed to diagnose the Torque Converter Clutch Solenoid electrical system ONLY. To prevent replacement of good components, note that the following areas may be at fault:

• Electrical — Battery, input sensors, wiring harnesses, brake switch
• Transmission — Internal transmission components, linkage, cooling

This pinpoint test is designed to diagnose the following components:

• Transmission Wiring Harness, Torque Converter Clutch Solenoid, Vehicle Power (VPWR)
• Powertrain Control Module

Refer to the following schematic and charts when performing the pinpoint test steps.

Transmission Vehicle Harness Connector Pin Identification

TEST PIN IDENTIFICATION

Circuit	PCM Pin Number
	EEC-V	EEC-IV 5.8L 0/8,500 GVW 7.5L 0/14,000 GVW
TCC	54 28 (Diesel)	53

• TCC = Torque Converter Clutch.
• VPWR = Vehicle Power.
• EEC = Electronic Engine Control.

 

C1 E4OD ELECTRONIC DIAGNOSTICS

• Check to make sure transmission harness connector is fully seated, terminals are fully engaged in connector and in good condition before proceeding.
• Connect Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent.
• Perform KOEO TEST until continuous memory DTCs have been displayed.
• Enter Output State Diagnostic Test Mode (DTM). Refer to Special Test Modes in this section.
• Depress throttle to wide-open throttle and release.

Yes	No
REMAIN in Output State DTM. GO to C2.	DEPRESS throttle and RELEASE. If vehicle did not enter Output State DTM, REFER to Powertrain Control/Emissions Diagnosis Manual OBDI or OBDII.

 

C2 CHECK ELECTRICAL SIGNAL OPERATION

 CAUTION: Remove heat shield from transmission before removing connector. Remove solenoid body connector by pushing on center tab and pulling on wiring harness. Do not attempt to pry tab with a screwdriver. Reinstall heat shield after service.

• Disconnect transmission connector.
• Using a mirror, inspect both ends of connector for damaged or pushed out pins, corrosion, loose wires, and missing or damaged seals.

NOTE: Refer to the schematic and chart preceding this pinpoint test.

• Connect a volt-ohmmeter positive test lead to VPWR circuit and negative test lead to solenoid circuit of transmission vehicle harness connector.
• Place volt-ohmmeter on 20-volt scale.
• While observing volt-ohmmeter, depress and release throttle to cycle solenoid output On and Off.

Yes	No
GO to C5.	GO to C3.

 

C3 CHECK CONTINUITY OF SOLENOID SIGNAL AND VEHICLE POWER HARNESS CIRCUITS

• Turn ignition switch off.
• Make sure transmission harness connector is disconnected.
• Disconnect powertrain control module. Inspect for damaged or pushed out pins, corrosion, or loose wires.
• Install Rotunda EEC-IV 60-Pin Breakout Box 014-00322, or EEC-V 104-Pin Breakout Box 014-00950 or equivalent. Leave powertrain control module disconnected.

NOTE: Refer to the schematic and chart preceding this pinpoint test.

• Measure resistance between appropriate powertrain control module signal test pin at Breakout Box and signal pin at transmission harness connector.
• Measure resistance between appropriate power test pins at Breakout Box and VPWR pin at transmission harness connector.

Yes	No
GO to C4.	SERVICE open circuit(s). REMOVE Breakout Box. RECONNECT all components. REPEAT Quick Test.

 

C4 CHECK SOLENOID HARNESS FOR SHORTS TO POWER AND GROUND

• Make sure Rotunda EEC-IV 60-Pin Breakout Box 014-00322, or EEC-V 104-Pin Breakout Box 014-00950 or equivalent is installed and powertrain control module is disconnected.
• Make sure transmission harness connector is disconnected.

NOTE: Refer to the schematic and chart preceding this pinpoint test.

• Measure resistance between appropriate powertrain control module signal test pin and power test pins at the Breakout Box.
• Measure resistance between PCM signal output test pin and ground test pins at Breakout Box and chassis ground.

Yes	No
GO to C5.	SERVICE short circuit. REMOVE Breakout Box. RECONNECT all components. REPEAT Quick Test.

 

C5 SOLENOID FUNCTIONAL TEST

• Disconnect vehicle harness at transmission.
• Install Rotunda Transmission Tester 007-00085 or equivalent.
• Using tests outlined under Static Testing — Engine Off, perform the Solenoid Voltage Test.

NOTE: LED will turn green when solenoid activates and turn off when deactivated. LED will turn red if activated solenoid is shorted to B+. LED will remain off if an activated solenoid is shorted to ground or no continuity.

Yes	No
GO to C6.	GO to C7.

 

C6 TRANSMISSION DRIVE TEST

• Reconnect PCM.
• Perform Dynamic Testing — Engine On procedures.
• Does torque converter clutch activate when commanded by tester?

Yes	No
REPLACE PCM. PERFORM Transmission Drive Cycle Test in this section. REPEAT Quick Test. If symptoms are still present, REFER to Torque Converter Clutch Operation Concerns, under Diagnosis by Symptom, in the Diagnosis and Testing portion of this section.	GO to C7.

 

C7 CHECK RESISTANCE OF SOLENOID

• Set Bench/Drive switch to BENCH mode.
• Rotate gear select switch to OHMS CHECK position.
• Connect a volt-ohmmeter negative lead to torque converter clutch solenoid (TCC) jack and positive lead to vehicle power (VPWR) jack on tester.
• Record resistance.
• Resistance should be between 20-30 ohms.

Yes	No
GO to C8.	REPLACE solenoid body assembly.

 

C8 CHECK SOLENOID FOR SHORT TO GROUND

• Check for continuity between engine ground (BAT-) and appropriate jack with a volt-ohmmeter or other low current tester (less than 200 milliamps).
• Connection should show infinite resistance (no continuity).

Yes	No
REPLACE solenoid body assembly.	GO to Diagnosis by Symptom Index for torque converter clutch diagnosis.

 

PINPOINT TEST D: TRANSMISSION RANGE (TR) SENSOR

 

Diagnostic Trouble Codes:

• 654, P1705 — TR Sensor Not in Park (KOEO)
• 634 — TR Sensor Out of Range
• 667, P0707 — TR Sensor or Circuit Below Minimum Voltage
• 668, P0708 — TR Sensor or Circuit Above Maximum Voltage

NOTE: This pinpoint test is designed to diagnose the TR Sensor electrical system ONLY. To prevent replacement of good components, note that the following areas may be at fault:

• Engine — Starter, starter relay
• Electrical — Battery, ignition switch, wiring harnesses
• Transmission — Internal transmission components, linkages

This pinpoint test is designed to diagnose the following components:

• Transmission Wiring Harness, TR Sensor, Signal Return (SIG RTN)
• Powertrain control module.

Refer to the following schematic and charts when performing the pinpoint test steps.

Transmission Range (TR) Sensor Schematic and Connector Pin Identification

Pin Number	Circuit	Circuit Function
1	57 (BK)	Ground Circuit
2	359 (GY/R)	Sensor Signal Return
3	199 (LB/Y)	Transmission Range Sensor to PCM
4	463 (R/W)	Electronic Transfer Case Module to TR Sensor
5	33 (W/PK)	Starter Circuit
6	140 (BK/PK)	Backup Lamp
7	298 (P/O)	Fused Accessory Feed
8	32 (R/LB)	Starter Circuit

TR/MLP Tester 007-00086




 

D1 ELECTRONIC DIAGNOSTICS

NOTE: Additional codes may also be set by running Quick Tests with the transmission not in PARK or with the A/C on. Make sure Quick Tests are performed properly.

• Check to make sure Transmission Range (TR) sensor harness connector is fully seated, terminals are fully engaged in connector and in good condition before proceeding.
• Verify shift linkage adjustment in DRIVE.
• Turn ignition switch off.
• Apply parking brake.
• Place transmission in NEUTRAL.
• Verify that Transmission Range (TR) Sensor Alignment Tool T92P-70010-AH (MLPS Alignment Tool) fits in the appropriate slots.

Yes	No
REMOVE tool. GO to D2.	ADJUST sensor. REFER to Section 07-14A. After adjustments, PLACE transmission gearshift selector lever in PARK. CLEAR DTCs and REPEAT Quick Test.

 

D2 CHECK ELECTRICAL SIGNAL OPERATION

• Turn ignition switch off.

 CAUTION: Do not pry on connector. Pull up on vehicle harness connector.

• Disconnect transmission connector.
• Using a mirror, inspect both ends of the connector for damaged or pushed out pins, corrosion, loose wires and missing or damaged seals.

NOTE: Refer to the schematic preceding this pinpoint test.

• Connect a volt-ohmmeter positive test lead to TR sensor circuit and negative test lead to Signal Return circuit of transmission harness connector.
• Place volt-ohmmeter on 20-volt scale.
• Turn key on, engine off (KOEO).

Yes	No
GO to D5.	GO to D3.

 

D3 CHECK CONTINUITY OF TRANSMISSION RANGE (TR) SENSOR HARNESS CIRCUITS

• Turn ignition switch off.

 CAUTION: Do not pry connector. Squeeze TABS and pull up on vehicle harness.

• Disconnect TR sensor.
• Inspect for damaged or pushed out pins, corrosion, or loose wires.
• Disconnect powertrain control module.
• Inspect for damaged or pushed out pins, corrosion, or loose wires.
• Install Rotunda EEC-IV 60-Pin Breakout Box 014-00322, or EEC-V 104-Pin Breakout Box 014-00950 or equivalent. Leave powertrain control module disconnected.

NOTE: Refer to the schematic preceding this pinpoint test.

• EEC-IV
• Measure resistance between test pin 46 at Breakout Box and signal return circuit at TR sensor harness connector.
• Measure resistance between test pin 30 at Breakout Box and TR sensor circuit at TR sensor harness connector.
• EEC-V
• Measure resistance between PCM test pin 91 at Breakout Box and SIG RTN circuit at TR sensor vehicle harness connector.
• Measure resistance between PCM test pin 64 at Breakout Box and TR signal circuit at TR sensor vehicle harness connector.

Yes	No
GO to D4.	SERVICE open circuit(s). REMOVE Breakout Box. RECONNECT all components. ERASE codes. REPEAT Quick Test.

 

D4 CHECK TRANSMISSION RANGE (TR) SENSOR CIRCUIT FOR SHORTS TO POWER AND GROUND

• Make sure Rotunda Breakout Box is installed and powertrain control module is disconnected.
• Make sure TR sensor harness connector is disconnected.

NOTE: Refer to the schematic preceding this pinpoint test.

• EEC-IV
• Measure resistance between test pin 30 and test pins 37/57, 40/60, and 46 at Breakout Box.
• Measure resistance between test pin 30 at Breakout Box and chassis ground.
• EEC-V
• Measure resistance between PCM test pin 64 and test pins 71, 97, 51, 76, 77, 103 and 91.
• Measure resistance between PCM test pin 64 at Breakout Box and chassis ground.

Yes	No
GO to D5.	SERVICE short circuit. REMOVE Breakout Box. RECONNECT all components. ERASE codes. REPEAT Quick Test.

 

D5 CHECK TRANSMISSION RANGE SENSOR RESISTANCE

• Disconnect the TR sensor harness connector at the transmission.
• Connect Rotunda Transmission Range (TR) Sensor Cable "B" ("MLPS" Manual Lever Position Sensor Cable) 007-00086 or equivalent to sensor and tester.
• Install appropriate overlay onto tester.
• Using procedure provided with tester, verify sensor resistive functions in all positions.




Transmission Range Selector Lever Position	Resistance (Ohms) Min.	Resistance (Ohms) Max.	Range Volts
P	3770	4607	3.97-4.85
R	1304	1593	3.24-3.96
N	660	807	2.55-3.11
D	361	442	1.88-2.30
2	190	232	1.23-1.51
1	78	95	0.61-0.75

Yes	No
If sent here directly from Step D2, GO to Step D6. If sent here from Step D4, REPLACE PCM, then GO to D6.	REPLACE TR sensor and ADJUST. REFER to Section 07-14A. ERASE codes and REPEAT Quick Test.

 

D6 CHECK PARK/NEUTRAL CIRCUITS OF SENSOR

• Using the procedures outlined in the tester manual, check the Park/Neutral circuits of the sensor in all gear positions.
• Monitor the Status Lamp on the tester for proper indications.




COMPONENT TESTING PROCEDURE

To Test	Ohmmeter to Terminals	Move Range Selector Lever to These Positions	A Good Sensor Will Indicate
Starter Relay Circuit	33 (W/PK) and 32 (R/LB)	Park	Less than 5 ohms
		Reverse	Greater Than 100k ohms
		Neutral	Less than 5 ohms
		(D)	Greater than 100k ohms
		Second (2)	Greater than 100k ohms
		First (1)	Greater than 100k ohms

Yes	No
GO to D7. If diagnosing a Park/Neutral circuit or starting concern, REFER to the appropriate service manual sections.	REPLACE the TR sensor and adjust. REFER to Section 07-14A. ERASE DTCs and RERUN Quick Test.

 

D7 CHECK REVERSE/BACKUP LAMP CIRCUITS OF SENSOR

• Using the procedures outlined in the tester manual, check the Reverse/Backup circuits of the sensor in all gear positions.
• Monitor the Status Lamp on the tester for proper indications.




COMPONENT TESTING PROCEDURE

To Test	Ohmmeter to Terminals	Move Range Selector Lever to These Positions	A Good Sensor Will Indicate
Backup Lamp Circuit	298 (BK) and 140 (BK/PK)	Park	Greater than 100k ohms
		Reverse	Less than 5.0 ohms
		Neutral	Greater than 100k ohms
		(D)	Greater than 100k ohms
		Second (2)	Greater than 100k ohms
		First (1)	Greater than 100k ohms

Yes	No
GO to D8. If diagnosing only a Reverse/Backup circuit concern, REFER to the appropriate service manual section.	REPLACE the TR sensor and adjust. REFER to Section 07-14A for procedures. ERASE DTCs and RERUN Quick Test.

 

D8 CHECK OPTIONAL CIRCUITS (4x4 LOW — NEUTRAL SENSE) OF SENSOR (IF EQUIPPED)

• Using the procedures outlined in the tester manual, check the optional circuits of the sensor in all gear positions.
• Monitor the Status Lamp on the tester for proper indications.




COMPONENT TESTING PROCEDURE

To Test	Ohmmeter to Terminals	Move Range Selector Lever to These Positions	A Good Sensor Will Indicate
4x4 Low — Neutral Sense Circuit	463 (R/W) and 57 (BK)	Park	Greater than 100k ohms
		Reverse	Greater than 100k ohms
		Neutral	Less than 5.0 ohms
		(D)	Greater than 100k ohms
		Second (2)	Greater than 100k ohms
		First (1)	Greater than 100k ohms

Yes	No
The concern is not in the sensor. If you were directed here from the Diagnosis by Symptom, RETURN to Routine. If you were here diagnosing a DTC, REFER to the Powertrain Control/Emissions Diagnosis Manual OBDI or OBDII to diagnose intermittent concerns. If diagnosing an optional circuit concern,REFER to the appropriate service manual sections.	REPLACE the TR sensor and adjust. REFER to In-Vehicle Service in this section for procedures. ERASE DTCs and RERUN Quick Test.

 

PINPOINT TEST E: ELECTRONIC PRESSURE CONTROL (EPC) SOLENOID

 

Diagnostic Trouble Codes:

• P1747/624 — EPC Circuit Failure
• P1746/625 — Powertrain Control Module Failure — EPC Driver

NOTE: This pinpoint test is designed to diagnosis the electronic pressure control solenoid electrical system ONLY. To prevent replacement of good components, note that the following areas may be at fault:

• Engine — Performance
• Electrical — Battery, input sensors, wiring harnesses

This pinpoint test is designed to diagnose the following components:

• Transmission wiring harness, electronic pressure control, electronic pressure control power.
• Powertrain control module.

Refer to the following schematic and charts when performing the pinpoint test steps.

Transmission Vehicle Harness Connector Pin Identification

TEST PIN IDENTIFICATION

Circuit	PCM Pin Number
	EEC-V	EEC-IV 5.8L 0/8,500 GVW 7.5L 0/14,000 GVW
EPC	81	38
EPC PWR	71, 97	37, 57

EPC = Electronic Pressure Control.

 

E1 E4OD ELECTRONIC DIAGNOSTICS

• Check to make sure the transmission harness connector is fully seated, terminals are fully engaged in connector and in good condition before proceeding.
• Connect Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent.
• Perform KOEO test until continuous memory DTC have been displayed.
• Enter Output State Diagnostic Test Mode (DTM). Refer to Special Test Modes in this section.
• Depress throttle to wide-open throttle (WOT) and release.

Yes	No
REMAIN in Output State DTM. GO to E2.	DEPRESS throttle and release. If vehicle did not enter Output State DTM, REFER to Powertrain Control/Emissions Diagnosis Manual OBDI or OBDII.

 

E2 CHECK ELECTRICAL SIGNAL OPERATION

 CAUTION: Remove heat shield from transmission before removing connector. Remove solenoid body connector by pushing on center tab and pulling on wiring harness. Do not attempt to pry tab with a screwdriver. Reinstall heat shield after service.

• Disconnect transmission connector.
• Using a mirror, inspect both ends of connector for damaged or pushed out pins, corrosion, loose wires, and missing or damaged seals.

NOTE: Refer to the schematic and chart preceding this pinpoint test.

• Connect a volt-ohmmeter positive lead to vehicle power (VPWR) circuit and negative test lead to solenoid circuit of transmission vehicle harness connector.
• Place volt-ohmmeter on 20-volt scale.
• While observing volt-ohmmeter, depress and release throttle to cycle solenoid output On and Off.

Yes	No
GO to E5.	GO to E3.

 

E3 CHECK CONTINUITY OF SOLENOID SIGNAL AND VEHICLE POWER (VPWR) HARNESS CIRCUIT

• Turn ignition switch off.
• Disconnect powertrain control module. Inspect for damaged or pushed out pins, corrosion, or loose wires.
• Install Rotunda EEC-IV 60-Pin Breakout Box 014-00322, or EEC-V 104-Pin Breakout Box 014-00950 or equivalent. Leave powertrain control module disconnected.

NOTE: Refer to the schematic and chart preceding this pinpoint test.

• Measure resistance between appropriate power test pins at Breakout Box and electronic pressure control power circuit at transmission harness connector.
• Measure resistance between appropriate PCM signal output test pin at Breakout Box and electronic pressure control pin at transmission connector.

Yes	No
GO to E4.	SERVICE open circuit. REMOVE Breakout Box. RECONNECT all components. ERASE codes and REPEAT Quick Test.

 

E4 CHECK HARNESS FOR SHORT TO POWER OR GROUND

• Turn ignition switch off.
• Make sure Rotunda EEC-IV 60-Pin Breakout Box 014-00322, or EEC-V 104-Pin Breakout Box 014-00950 or equivalent is installed, powertrain control module is disconnected.
• Make sure transmission connector is disconnected.

NOTE: Refer to the schematic and chart preceding this pinpoint test.

• Measure resistance between appropriate electronic pressure control circuit test pin and power test pins at the Breakout Box.
• Measure resistance between appropriate electronic pressure control circuit test pin and ground test pins at the Breakout Box.

Yes	No
GO to E5.	SERVICE short circuit. REMOVE Breakout Box. RECONNECT all components. REPEAT Quick Test.

 

E5 TRANSMISSION FUNCTIONAL TEST

• Make sure the transmission harness connector is disconnected.
• Intall line pressure gauge at line tap on case.
• Install Rotunda Transmission Tester 007-00085 and Cable and Overlay 007-00107 or equivalents.
• Set Bench/Drive switch to DRIVE mode.
• Rotate gear selector switch to 1st gear position.
• Using tests outlined under Dynamic Testing — Engine On, perform EPC Solenoid Functional Test.
• Does electronic pressure control (LED green) activate when electronic pressure control switch is depressed?
• Observe line pressure on gauge while depressing electronic pressure control switch.

NOTE: Vehicle must be running.

Yes	No
REPLACE powertrain control module. REPEAT Quick Test.	GO to E6.

 

E6 CHECK RESISTANCE OF SOLENOID

 CAUTION: Be sure that tester power is OFF or damage to volt-ohmmeter may result.

• Connect volt-ohmmeter negative lead to vehicle power (VPWR) jack and positive lead to electronic pressure control (EPC) jack on tester.
• This is to test electronic pressure control solenoid.
• Record resistance.

Yes	No
GO to E7.	REPLACE solenoid body assembly. RECORD and ERASE codes. REPEAT Quick Test.

 

E7 CHECK SOLENOID FOR SHORT TO GROUND

• Check for continuity between engine ground (BAT-) and appropriate jack with a volt-ohmmeter or other low current tester (less than 200 milliamps).




Solenoid	Tester Jack
Electronic Pressure Control	Electronic Pressure Control (EPC) Vehicle Power (VPWR)



• Connection should show infinite resistance (no continuity).

Yes	No
REPLACE solenoid body assembly. RECORD and ERASE codes. REPEAT Quick Test.	GO to Diagnosis by Symptom Index for diagnosis of electronic pressure control concerns.

 

PINPOINT TEST G: COAST CLUTCH SOLENOID (CCS)

 

Diagnostic Trouble Codes:

• P1754/626 — Coast Clutch Solenoid Circuit Failure

NOTE: This pinpoint test is designed to diagnosis the Coast Clutch Solenoid electrical system ONLY. To prevent replacement of good components, note that the following areas may be at fault:

• Electrical — Battery, input sensors, wiring harnesses

This pinpoint test is designed to diagnose the following components:

• Transmission wiring harness, coast clutch solenoid, vehicle power (VPWR).
• Powertrain control module.

Refer to the following schematic and charts when performing the pinpoint test steps.

Transmission Vehicle Harness Connector Pin Identification

TEST PIN IDENTIFICATION

Circuit	PCM Pin Number
	EEC-V PCM Pins	EEC-IV PCM Pins 5.8L 0/8,500 GVW 7.5L 0/14,000 GVW
CCS	53	55
PWR	71, 97	37, 57

CCS = Coast Clutch Solenoid.

 

G1 E4OD ELECTRONICS DIAGNOSTICS

• Check to make sure transmission harness connector is fully seated, terminals are fully engaged in connector and in good condition before proceeding.
• Connect Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent.
• Perform KOEO TEST until continuous memory DTC have been displayed.
• Enter Output State Diagnostic Test Mode (DTM). Refer to Special Test Modes in this section.
• Depress throttle to wide-open throttle and release.

Yes	No
REMAIN in Output State DTM. GO to G2.	DEPRESS throttle and RELEASE. If vehicle still does not enter Output State DTM, REFER to Powertrain Control/Emissions Diagnosis Manual OBDI or OBDII.

 

G2 CHECK ELECTRICAL SIGNAL OPERATION

 CAUTION: Remove heat shield from transmission before removing connector. Remove solenoid body connector by pushing on center tab and pulling on wiring harness. Do not attempt to pry tab with a screwdriver. Reinstall heat shield after service.

• Disconnect transmission connector.
• Using a mirror, inspect both ends of connector for damaged or pushed out pins, corrosion, loose wires, and missing or damaged seals.

NOTE: Refer to the schematic and chart preceding this pinpoint test.

• Connect volt-ohmmeter positive test lead to vehicle power (VPWR) circuit and negative test lead to solenoid circuit of transmission vehicle harness connector.
• Place volt-ohmmeter on 20-volt scale.
• While observing volt-ohmmeter, depress and release throttle several times to cycle solenoid output on and off.

Yes	No
GO to G5.	GO to G3.

 

G3 CHECK CONTINUITY OF SOLENOID SIGNAL AND VEHICLE POWER HARNESS CIRCUITS

• Turn ignition switch off.
• Make sure transmission harness connector is disconnected.
• Disconnect powertrain control module. Inspect for damaged or pushed out pins, corrosion or loose wires.
• Install Rotunda EEC-IV 60-Pin Breakout Box 014-00322, or EEC-V 104-Pin Breakout Box 014-00950 or equivalent. Leave powertrain control module disconnected.

NOTE: Refer to the schematic and chart preceding this pinpoint test.

• Measure resistance between appropriate powertrain control module signal test pin at Breakout Box and signal pin at transmission harness connector.
• Measure resistance between appropriate power test pins at Breakout Box and vehicle power pin at transmission harness connector.

Yes	No
GO to G4.	SERVICE open circuit(s). REMOVE Breakout Box. RECONNECT all components. REPEAT Quick Test.

 

G4 CHECK SOLENOID HARNESS FOR SHORTS TO POWER AND GROUND

• Make sure Rotunda EEC-IV 60-Pin Breakout Box 014-00322, or EEC-V 104-Pin Breakout Box 014-00950 or equivalent is installed and powertrain control module is disconnected.

NOTE: Refer to the schematic and chart preceding this pinpoint test.

• Measure resistance between appropriate powertrain control module signal output pin and power test pins at the Breakout Box.
• Measure resistance between appropriate PCM signal output pin and ground test pin at Breakout Box and chassis ground.

Yes	No
GO to G5.	SERVICE short circuit. REMOVE Breakout Box. RECONNECT all components. REPEAT Quick Test.

 

G5 SOLENOID FUNCTIONAL TEST

• Reconnect PCM.
• Make sure that the vehicle harness is disconnected at the transmission connector.
• Install Rotunda Transmission Tester 007-00085 and Cable and Overlay 017-00107 or equivalents.
• Using tests outlined under Static Testing — Engine Off, perform the Solenoid Voltage Test.

NOTE: LED will turn green when solenoid activates and turn off when deactivated. LED will turn red if activated solenoid is shorted to B+. LED will remain off if an activated solenoid is shorted to ground or no continuity.

Yes	No
GO to G6.	GO to G7.

 

G6 TRANSMISSION DRIVE TEST

• Perform Dynamic Testing — Engine On procedures as outlined in this section.
• Does coast clutch solenoid activate when commanded by the tester?
• Does engine braking occur?

Yes	No
ERASE all codes and PERFORM Transmission Drive Cycle Test in this section. REPEAT Quick Test.	GO to G7.

 

G7 CHECK RESISTANCE OF SOLENOID

• Set Bench/Drive switch to BENCH mode.
• Rotate gear select switch to OHMS. CHECK position.
• Connect a volt-ohmmeter negative lead to coast clutch solenoid jack and positive lead to vehicle power (VPWR) jack on tester.
• Record resistance.
• Resistance should be between 20-30 ohms.

Yes	No
GO to G8.	REPLACE solenoid body assembly.

 

G8 CHECK SOLENOID FOR SHORT TO GROUND

• Check for continuity between engine ground (BAT-) and appropriate jack with or other low current tester (less than 200 milliamps).




Solenoid	Tester Jack
Coast Clutch Solenoid	Coast Clutch Solenoid (CCS)



• Connection should show infinite resistance (no continuity).

Yes	No
REPLACE solenoid body assembly.	GO to Diagnosis by Symptom section for coast clutch concerns.

---