Diagnostic Flow Chart

SPECIAL TOOLS DESCRIPTION CHART

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

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

Know and understand the customer concern.
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 KOEO and 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 article first, then this service information, GO to Step 2.
1) Were any DTCs recorded?	No	REFER to DIAGNOSIS BY SYMPTOM , GO to Step 5.
2) Are any continuous test memory codes present?	Yes	CLEAR codes and CARRY OUT drive cycle test, GO to Step 3.
2) Are any continuous test memory codes present?	No	GO 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 article, then the appropriate transmission reference article, then this service information, GO to Step 4.
3) Did the continuous test memory codes reappear?	No	GO to Step 4.
4) Is the concern repaired?	Yes	CARRY OUT the final self-test and verify no DTCs are present. CLEAR memory codes.
4) Is the concern repaired?	No	REFER to DIAGNOSIS BY SYMPTOM , GO to Step 5.
5) Are there any electrical concerns?	Yes	INSTALL the scan tool. CARRY OUT static and drive test with the scan tool, GO to Step 6.
5) Are there any electrical concerns?	No	REFER to the appropriate hydraulic and mechanical routine to diagnose and repair the concern, GO to Step 7.
6) Was the transmission concern corrected when the scan tool was installed?	Yes	REFER to the INTRODUCTION article, intermittent fault diagnosis information 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 appropriate hydraulic and mechanical routine to diagnose the concern, GO to Step 7.
7) Is the concern repaired?	Yes	CARRY OUT the final self-test and verify 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.