Diagnostic Flow Chart

SPECIAL TOOL(S)

Vehicle Communication Module (VCM) and Integrated Diagnostic System (IDS) software with appropriate hardware, or equivalent scan tool.

Prior to carrying out the diagnostic flow chart test, the following items should be checked:

Know and understand the customer's concerns.
Verify the concern by operating the vehicle.
Check the transmission fluid level and condition.
Check for non-factory-installed items and verify correct installation.
Check the selector lever linkage adjustments.
Check TSB messages for vehicle concerns.
Carry out both Carry Out On-Board Diagnostic (OBD) Key ON Engine OFF (KOEO) and Key ON Engine Running (KOER) Self Test .
Record all DTCs.

DIAGNOSTIC FLOW CHART

Test	Result	Action
1) Were any DTCs recorded?	Yes	REPAIR all hard DTCs. FOLLOW the pinpoint tests. REFER to the INTRODUCTION - GASOLINE MODELS Article first, then this service information then Refer to Step 2.
1) Were any DTCs recorded?	No	REFER to DIAGNOSIS BY SYMPTOM , then Refer to Step 5.
2) Are any continuous test memory codes present?	Yes	CLEAR codes and CARRY OUT drive cycle test, then Refer to Step 3.
2) Are any continuous test memory codes present?	No	Refer to Step 4.
3) Did the continuous test memory codes reappear?	Yes	REPAIR all continuous test memory codes. FOLLOW the pinpoint tests. REFER to the INTRODUCTION - GASOLINE MODELS Article, then the transmission reference manual, then this service information, then Refer to Step 4.
3) Did the continuous test memory codes reappear?	No	Refer to Step 4.
4) Is the concern repaired?	Yes	Carry Out On-Board Diagnostic (OBD) Key ON Engine OFF (KOEO) and Key ON Engine Running (KOER) Self Test to verify that no DTCs are present. CLEAR memory codes.
4) Is the concern repaired?	No	REFER to DIAGNOSIS BY SYMPTOM then Refer to Step 5.
5) Are there any electrical concerns?	Yes	INSTALL the scan tool. CARRY OUT KOEO and KOER tests and drive cycle test with the scan tool, then Refer to Step 6.
5) Are there any electrical concerns?	No	REFER to the hydraulic and mechanical routine to diagnose and repair the concern, then Refer to Step 7.
6) Was the transmission concern corrected when the scan tool was installed?	Yes	REFER to the INTRODUCTION - GASOLINE MODELS Article, intermittent fault diagnosis section and use the scan tool to diagnose cause of concern in the processor, vehicle harness or external inputs (sensors or switches).
	No	REFER to the hydraulic and mechanical routine to diagnose the concern, then Refer to Step 7.
7) Is the concern repaired?	Yes	CARRY OUT the final quick test to verify that no DTCs are present. CLEAR memory codes.
7) Is the concern repaired?	No	Concern should have been repaired. GO back through the Diagnostic Flow Chart and review other components that may have contributed to the concern. CHECK and DIAGNOSE those components. Get assistance from other sources.