PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE

For a complete wiring diagram Refer to Section 8W.



Diagnostic Test

1.NO RESPONSE

NOTE: For vehicle communication problems, use the scan tool to refer to the Network Review Screen. The screen depicts a high level view of the vehicle network. Fault and problem areas appear in red.



Does the scan tool display a Vehicle Network problem or NO RESPONSE condition?

Yes
  • Refer to the appropriate BUS Communication test in Section 8 ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS.


No
  • Go To 2

2.NO START


Does the vehicle have a NO START condition?

Yes
  • Check the vehicle for any DTC(s), including Vehicle Theft Security related DTC(s), that may cause a no-start condition.
  • If no DTC(s) are present that relate to a no-start condition, refer to the Non DTC Diagnostic Procedures that relate to Fuel and Starting.


No
  • Go To 3

3.VEHICLE REPAIR HISTORY AND TSB(s)






Select the appropriate response for the condition that applies:

Performing a TSB procedure repaired the condition.
  • Test Complete.
  • Perform the ECM Verification Test Ver. 1.


A DTC is present, no TSB applies, or the TSB didn't repair the condition.
  • Go To 4


No DTC(s) or conditions are present.
  • Refer to the INTERMITTENT CONDITION Diagnostic Procedure.

4.VEHICLE INSPECTION

WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.















Were any repairs made that corrected the DTC or condition?

Yes
  • Test complete.
  • Perform the ECM Verification Test Ver. 1.


No
  • Refer to the diagnostic test procedure related to the DTC.