Diesel Data: Automotive Repair

13 No Fail-Safe Codes (Does Not Shift)

PROBLEM
No fail safe code (No shift made)

DESCRIPTION
No shift is made during operation. No fail safe code is output. In this case, a defective overdrive switch, position Park/Neutral switch, etc. are suspected.

PROBABLE CAUSE OF TROUBLE
- Defective overdrive switch
- Defective Park/Neutral position switch
- Detective power supply circuit
- Defective transaxle control module





DIAGNOSTIC CHART