Action Taken By PCM
WARNING: This page is about a different car, the 2002 GMC Cab & Chassis Sierra and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
PCM performs the following actions if DTC is set:
- The PCM does not illuminate the MIL.
- The PCM commands increased line pressure.
- The PCM freezes shift adapts.
- The PCM determines a default transmission fluid temperature using the following matrix:
- If the engine coolant temperature is -22 to 230°F (-30 to 110°C), then default transmission fluid temperature equals engine coolant temperature plus 10 degrees.
- If the engine coolant temperature is greater than 230°F (110°C), then default transmission fluid temperature is set to 284°F (140°C) and transmission shift pattern is in hot mode.
- If engine coolant temperature and transmission fluid temperature DTCs are both set, then default transmission fluid temperature is 284°F (140°C).
- The PCM records the operating conditions when the conditions for setting the DTC are met. The PCM stores this information as failure records.
- The PCM stores DTC P0712 in PCM history.