FixVault
Home › Jeep › 2012 › Wrangler Sahara, Automatic Trans › Repair and Diagnosis › Transmission › Automatic Trans › Transmission Control Module (TCM) - Electrical Diagnostics › DTC Troubleshooting › P1633-TCM Internal - Test External Watchdog Performance › Set Condition:

Set Condition:

If the TCM detects an error with the controllers external watchdog - failed the power up test.

About FixVault