2. Problem Verification

1. Warm up engine to normal operating temperature.
2. Using Hi-Scan (Pro), monitor MAFS signals while changing throttle position.

• Refer to  SPECIFICATIONS   for more information. 

Does signal change normally according to TPS signal? 

No: Go to next step.

Yes: Problem is intermittent or was repaired and engine control module memory was not cleared. Proceed with intermittent problem procedure.