Powertrain Controls - ECM/PCM

DTC 76 Chart:

Trans. Pressure Control Solenoid Circuit:

CIRCUIT DESCRIPTION
The pressure control solenoid is a Powertrain Control Module (PCM) controlled device used to regulate transaxle line pressure. The PCM compares Throttle Position (TP) voltage, engine RPM and other inputs to determine the appropriate line pressure for a given load. The PCM will regulate the pressure by applying a varying amperage to the pressure control solenoid. The applied amperage can vary from 0.0 to 1.1 amp. The PCM then monitors the amperage at the return line.

DTC 76 WILL SET WHEN
- No DTCs 16, 86, 89.
- Engine operating.
- If the difference between commanded and actual transaxle pressure control solenoid current is 0.16 amps or greater for 1 second.
OR
- If the transaxle pressure control solenoid is energized at 100% duty cycle for 3 minutes or greater.

ACTION TAKEN (PCM WILL DEFAULT TO)
- With a current DTC 76 set, the PCM will illuminate the Malfunction Indicator Lamp (MIL) (Service Engine Soon).
- The PCM will de-energize the transaxle pressure control solenoid.
- The PCM will disable torque management.
- Transaxle shift adapts are maintained at current levels.

DTC 76 WILL CLEAR WHEN
The fault no longer exists and the DTC is cleared with a scan tool.

DTC CHART TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.

1. This test checks for an increase in pressure.
2. This test checks for the proper amperage being applied.

DIAGNOSTIC AIDS
This test checks the operation of the force motor control circuit by monitoring the commanded current and the actual current.
This DTC must be cleared with a scan tool.