DDEC III/IV Single ECM Troubleshooting – Section 75.3 Troubleshooting Flash Code 75

Section 75.3
Troubleshooting Flash Code 75

The following procedure will troubleshoot Flash Code 75. ‪

Section 75.3.1
High Voltage

Perform the following steps to troubleshoot high voltage.‪

1. Turn ignition ON.
2. Plug in the diagnostic data reader (DDR).
3. Read logged codes.
   1. If any codes other than 168/0 are received, service the other codes first.
   2. If code 168/0 and no other codes are logged, the voltage to the ECM is too high. Check batteries and/or vehicle charging system.