TDC Offset Program Procedure

This procedure allows PCM memory to be updated with correct TDC offset for vehicle. DTC 88 will be stored until procedure has been completed.

1. Battery must be fully charged, engine operating at idle and vehicle at operating temperature.
2. Connect Tech 1 scan tool. Select "OUTPUT TESTS" and "INJ. PUMP". Activate "TDC LEARN."
   NOTE: It will take PCM 20 seconds to learn TDC offset.
3. Verify "TDC OFFSET" in data list. DTC will be stored if procedure has not been done correctly.
4. If PCM fails to program TDC OFFSET, do the following:
   • Check all PCM connection.
   • Check Techline terminal/equipment for latest software version.
   • Try again to program PCM. If it fails again replace PCM.