1997 PCED OBDII-Diesel
SECTION 5C: Pinpoint Tests

Y: Engine Oil Temperature (EOT) Sensor
  Y: Introduction  

 

Y1 DIAGNOSTIC TROUBLE CODE (DTC) P0198

Is resistance less than 5 ohms?
YesNo
GO to Y2.REPAIR open in signal return circuit. CLEAR DTCs and RETEST.
 

Y2 INDUCE OPPOSITE FAILURE

Is DTC P0197 present?
YesNo
REPLACE EOT sensor. CLEAR DTCs and RETEST.GO to Y3.
 

Y3 CHECK CONTINUITY OF SENSOR SIGNAL AND SIG RTN CIRCUITS

Is each resistance less than 5 ohms?
YesNo
REPLACE PCM. REMOVE breakout box. CLEAR DTCs and RETEST.SERVICE open in signal circuit. CLEAR DTCs and RETEST.
 

Y4 DIAGNOSTIC TROUBLE CODE (DTC) P0197: INDUCE OPPOSITE DTC P0198

Is DTC P0198 present?
YesNo
REPLACE EOT sensor. RECONNECT harness. RERUN Scan Tool Diagnostic Test.GO to Y5.
 

Y5 CHECK TEMPERATURE SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND

Is each resistance greater than 10,000 ohms?
YesNo
REPLACE PCM. REMOVE breakout box. CLEAR DTCs and RETEST.SERVICE short to ground circuit. REMOVE breakout box. CLEAR DTCs and RETEST.
 

Y6 CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODE (DTC) P0198, OR P0197: CHECK SENSOR

Does EOT sensor value default to 100°C (212°F)?
YesNo
GO to Y9.GO to Y7.
 

Y7 CHECK VEHICLE HARNESS

Does EOT sensor value default to 100°C (212°F)?
YesNo
REPAIR circuit as required.GO to Y8.
 

Y8 CHECK PCM AND VEHICLE HARNESS CONNECTORS

Are connectors and terminals OK?
YesNo
Unable to duplicate or identify concern at this time. CLEAR DTCs and RETEST.SERVICE as necessary. CLEAR Continuous Memory and RETEST.
 

Y9 INSPECT CONNECTOR PINS

Is a fault detected?
YesNo
REPAIR damaged pins as required. CLEAR DTCs and RETEST.REPLACE EOT sensor. CLEAR DTCs and RETEST.
 

Y10 DIAGNOSTIC TROUBLE CODE (DTC) P0196 OR P1184: CHECK OPERATION, INSTALLATION OF EOT SENSOR

Is DTC P0196 or P1184 present?
YesNo
GO to Y11.SERVICE other DTCs as necessary.
 

Y11 EOT SENSOR CHECK

Does EOT valve fluctuate or go below 74°C ([165°F) (1.37 volts)]?
YesNo
REPLACE EOT sensor. CLEAR DTCs and RETEST.GO to Y12.
 

Y12 VEHICLE HARNESS CHECK

Does valve fluctuate?
YesNo
REPAIR circuits as required. CLEAR DTCs and RETEST.GO to Y13.
 

Y13 CHECK PCM AND VEHICLE HARNESS CONNECTOR

Are connectors and terminals OK?
YesNo
Unable to duplicate and/or identify concern at this time. CLEAR DTCs and RETEST.SERVICE as required. CLEAR DTCs and RETEST.