Diagnostic Instructions

DTC Descriptors

DTC P0961:  Line Pressure Control (PC) Solenoid System Performance

DTC P0962:  Line Pressure Control (PC) Solenoid Control Circuit Low Voltage

DTC P0963:  Line Pressure Control (PC) Solenoid Control Circuit High Voltage

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Line PC Solenoid Control	P0962	P0963	P0963	P0961
Line PC Solenoid High Side Driver 2	P1833	P1833	P1834	P0961

Typical Scan Tool Data

Line PC Solenoid

Circuit	Short to Ground	Open	Short to Voltage
Operating Conditions: Engine running, normal operating temperature Parameter Normal Range: OK
Line PC Sol. CKT Status	Short to Ground	Open/Short to Voltage	Open/Short to Voltage
High Side Driver 2 CKT Status	Open/Short to GND	Open/Short to GND	Short to Voltage

Circuit/System Description

The line pressure control (PC) solenoid is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The line PC solenoid regulates the transmission fluid line pressure. The TCM varies the current to the normally high line PC solenoid valve from 0.1 amp for maximum line pressure, to 1.1 amps for minimum line pressure. This is accomplished by varying the desired line pressure in kPa (psi).

Conditions for Running the DTC

P0961, P0963

P0962

Conditions for Setting the DTC

P0961

The TCM detects an internal electrical performance malfunction of the line PC solenoid control circuit and the actual line pressure does not equal the commanded line pressure for 4.4 seconds in the 5 seconds sample time.

P0962

The TCM detects an internal low voltage electrical malfunction of the line PC solenoid control circuit for 300 milliseconds in the 375 milliseconds sample time.

P0963

The TCM detects an internal high voltage electrical malfunction of the line PC solenoid control circuit for 300 milliseconds in the 375 milliseconds sample time.

Action Taken When the DTC Sets

P0962

P0961 or P0963

Conditions for Clearing the DIC/DTC

Diagnostic Aids

When attempting to set DTCs, ensure the TCM is warmed up and the transmission is operated in 2nd gear long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the optimal conditions to test DTCs.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

DTC Type Reference

Electrical Information Reference

Scan Tool Reference

Circuit/System Testing

1. Ensure the transmission fluid temperature is between 50-80°C (122-176°F).
2. Operate the vehicle in 2nd gear long enough to ensure at least a 3°C (5°F) rise in TCM temperature, then operate the vehicle in Park for 5 seconds.
3. Observe the scan tool data parameter Line PC Sol. CKT Status, the parameter should display OK.

⇒	If the parameter displays Open, Short to Volts, Short to GND or if the DTC resets, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.

⇒	If no concerns are found during the inspection, replace the control solenoid (w/body and TCM) valve assembly.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.