Diagnostic Flow Chart

DIAGNOSTIC FLOW

Diagnostic Flow Chart
Know and understand the customer's concerns Check the fluid level and condition Verify the concern by operating the vehicle Check for non-factory-installed items and verify correct installation Check the shift linkage adjustments Check TSBs messages for vehicle concerns Carry out quick test both KOER and KOEO Record all codes 1) Did you record any Diagnostic Trouble Codes?	Yes	REPAIR all hard Diagnostic Trouble Codes. FOLLOW the pinpoint tests. REFER to the INTRODUCTION - CNG, FLEX-FUEL & GASOLINE .
	No	REFER to DIAGNOSIS BY SYMPTOM , then GO to Step 5.
2) Are any continuous test memory codes present?	Yes	CLEAR codes and carry out drive cycle test.
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 INTRODUCTION - CNG, FLEX-FUEL & GASOLINE , then 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 quick test to verify that no Diagnostic Trouble Codes are present. CLEAR memory codes.
4) Is the concern repaired?	No	REFER to DIAGNOSIS BY SYMPTOM .
5) Are there any electrical concerns?	Yes	INSTALL the diagnostic tool and CARRY OUT output state control test, then GO to Step 6.
5) Are there any electrical concerns?	No	REFER to the DIAGNOSIS BY SYMPTOM to diagnose and repair the concern, then GO to Step 7.
6) Was the transmission concern corrected when the scan tool was installed?	Yes	REFER to INTRODUCTION - CNG, FLEX-FUEL & GASOLINE and use the diagnostic tool or WDS to diagnose cause of concern in the processor, vehicle harness or external inputs (sensors or switches).
	No	REFER to the DIAGNOSIS BY SYMPTOM to diagnose the concern, then GO to Step 7.
7) Is the concern repaired?	Yes	CARRY OUT the final quick test to verify that no diagnostic trouble codes are present. CLEAR memory codes.
7) Is the concern repaired?	No	No further testing is available. Repeat procedures as necessary.