1994 PCED OBDI-A
SECTION 18A: Diesel Diagnosis — 7.3L DI Engine

N: Clutch Pedal Position (CPP) Switch
  N: Introduction  

 

N1 DIAGNOSTIC TROUBLE CODE (DTC) 528: RERUN KOER SWITCH TEST

Is KOER DTC 528 still present?
YesNo
GO to N2.SERVICE other DTCs as necessary. If none, testing complete.
 

N2 CHECK CPP SWITCH OPERATION (PEDAL RELEASED)

Is B+ present?
YesNo
GO to N3.GO to N5.
 

N3 CHECK CPP SWITCH OPERATION (PEDAL DEPRESSED)

Is voltage less than 1 volt?
YesNo
CPP circuit tests OK. RETURN to symptom flow charts.GO to N4.
 

N4 CHECK CIRCUIT 306 (T/LB) FOR BATTERY SHORT

Is B+ present?
YesNo
SERVICE battery short on Circuit 306 (T/LB). RETURN Scan Tool Diagnostic Test.Clutch pedal position switch shorted closed. REPLACE switch. RERUN Scan Tool Diagnostic Test.
 

N5 CHECK FUSE FOR OPEN

Is fuse OK?
YesNo
GO to N6.REPLACE 10A fuse. RERUN Scan Tool Diagnostic Test.
 

N6 CHECK CIRCUIT 306 (T/LB) FOR OPEN

Is resistance greater than 10,000 ohms?
YesNo
CPP circuit open or high resistance. SERVICE Circuit 306. RERUN Scan Tool Diagnostic Test.SERVICE ground short in Circuit 306 (T/LB). RERUN Scan Tool Diagnostic Test.