1996 PCED OBDI
SECTION 18: Diesel Diagnosis — 7.3L DI Engine

R: Glow Plug Lamp (GPL)
  R: Introduction  

 

R1 DIAGNOSTIC TROUBLE CODE (DTC) 0381

Does WAIT TO START lamp remain on?
YesNo
GO to R2.GO to R3.
 

R2 CHECK CIRCUIT 464 (BK/PK) FOR SHORT

Is WAIT TO START lamp on?
YesNo
SERVICE ground short in Circuit 464 (BK/PK) between WAIT TO START lamp and PCM. RERUN Scan Tool Diagnostic Test.REPLACE PCM. RERUN Scan Tool Diagnostic Test.
 

R3 CHECK FUSE FOR OPEN

Is fuse OK?
YesNo
GO to R4.GO to R5.
 

R4 CHECK WARNING LIGHT BULB FOR OPEN

Is bulb OK?
YesNo
GO to R6.REPLACE bulb. RERUN Scan Tool Diagnostic Test.
 

R5 CHECK CIRCUIT 640 (R/Y) FOR GROUND SHORT

Is resistance greater than 10,000 ohms?
YesNo
REPLACE fuse. RERUN Scan Tool Diagnostic Test.SERVICE ground short in Circuit 640 (R/Y). REPLACE fuse. RERUN Scan Tool Diagnostic Test.
 

R6 CHECK FOR OPEN CIRCUIT 640 (R/Y)

Is B+ present?
YesNo
GO to R7.SERVICE open in Circuit 640 (R/Y) between fuse and WAIT TO START lamp. RERUN Scan Tool Diagnostic Test.
 

R7 CHECK FOR OPEN IN CIRCUIT 464 (BK/PK)

Is resistance less than 5 ohms?
YesNo
REPLACE PCM. RERUN Scan Tool Diagnostic Test.SERVICE open in Circuit 464 (BK/PK). RERUN Scan Tool Diagnostic Test.