Action Taken By PCM
WARNING: This page does not describe the selected car, but rather 36 other vehicles, including the 2002 Pontiac Firebird, 2002 Oldsmobile Bravada, 2002 GMC Yukon XL, 2002 GMC Yukon, and 2002 GMC Sonoma. However, it is still accessible from the selected car via links, so may be relevant.
PCM performs the following actions if DTC is set:
- Illuminates MIL during the second consecutive trip in which the conditions for setting the DTC are met.
- PCM commands "D2" line pressure.
- PCM inhibits 3-2 downshifts if vehicle speed is greater than 30 MPH.
- Freezes shift adapts from being updated.
- Records operating conditions when conditions for running DTC are met.
- DTC P0753 is recorded in history.
SHIFT SOLENOID COMBINATIONS & GEAR RATIO
| Gear | 1-2 Shift Solenoid | 2-3 Shift Solenoid | Gear Ratio |
|---|---|---|---|
| 1st | On | On | 3.059:1 |
| 2nd | Off | On | 1.625:1 |
| 3rd | Off | Off | 1.000:1 |
| 4th | On | Off | 0.696:1 |