Diagnostic Routine F

Diagnostic Routine F

Diagnostic Overview

P0748, P0960, P0962, P0963

Refer to Wiring Diagram Set 29 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

The LPC (Line Pressure Control) is a VFS (Variable Force Solenoid). The LPC (Line Pressure Control) is an electro-hydraulic actuator combining a solenoid and a regulating valve. It supplies the pressure which regulates transaxle line pressure. This is done by producing resisting forces to the main regulator and line modulator circuits. These 2 pressures control clutch application pressures.

DTC Fault Trigger Conditions






Pinpoint Test

NOTE: If the scan tool is unable to communicate with the PCM (Powertrain Control Module) or access the transmission PIDs (Parameter Identifications), REFER to Computers and Control Systems Information.

1. Read and record all DTCs (Diagnostic Trouble Codes)

1. Install the scan tool and record all DTCs (Diagnostic Trouble Codes).

Were DTCs (Diagnostic Trouble Codes) P0748, P0960, P0962 and/or P0963 set?






2. Check the LPC (Line Pressure Control) circuit for an open

1. Ignition OFF.

2. Disconnect the transaxle vehicle harness C168.

3. Disconnect the PCM (Powertrain Control Module) C175T.

4. Inspect the connectors for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.

5. Measure the resistance of circuit CET09 (YE/VT) from the transaxle vehicle harness C168-18 to PCM (Powertrain Control Module) C175T-34.





Is the resistance less than 5 ohms?






3. Check the LPC (Line Pressure Control) for an open

1. Measure the resistance between the transaxle internal harness, terminal 18 and terminal 15 component side.





Is the resistance between 4.0 and 7.2 ohms?






4. Check the LPC (Line Pressure Control) circuit for a short to ground

1. Ignition OFF.

2. Disconnect the transaxle vehicle harness C168.

3. Disconnect the PCM (Powertrain Control Module) C175T.

4. Inspect the connectors for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.

5. Measure the resistance of circuit CET09 (YE/VT) from the transaxle vehicle harness C168-18 to ground.





Is the resistance greater than 10,000 ohms?






5. Check the LPC (Line Pressure Control) for a short to ground

1. Measure the resistance between the transaxle internal harness connector, terminal 18 and ground.





Is the resistance less than 5 ohms?






6. Check the LPC (Line Pressure Control) circuit for a short to voltage

1. Ignition OFF.

2. Disconnect the transaxle vehicle harness C168.

3. Disconnect the PCM (Powertrain Control Module) C175T.

4. Inspect the connectors for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.

5. Ignition ON.

6. Measure for voltage on circuit CET09 (YE/VT) from the transaxle vehicle harness C168-18 to ground.





Is any voltage present?