2010 Cadillac CTS Sedan AWD V6-3.0L Page 1697

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1697

Module Assembly Inspection).

3. Place the Q8 control solenoid valve assembly on a clean work surface near the transmission assembly.

4. Connect the DT-47825-10 - jumper harness between the vehicle wire harness electrical connector, and the Q8 control solenoid valve

assembly electrical connector.

5. Ignition ON, verify with a scan tool that each TFP switch parameters changes states when gently pushing on each TFP switch with the eraser

end of a pencil.

瀚慖f any TFP switch parameter does not change states, replace the Q8 control solenoid valve assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Control solenoid valve assembly replacement. Refer to Control Module References (See: Testing and Inspection/Programming and

Relearning) for replacement, setup, and programming.

* Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and

Inspection/Programming and Relearning/Service Fast Learn Adapts) following all transmission related repairs.

P0961

DTC P0961-P0963

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

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

Typical Scan Tool Data

Circuit/System Description

The line pressure control (PC) solenoid is part of the control solenoid valve assembly which has no serviceable parts. The normally high line PC

solenoid regulates and directs the PC solenoid oil pressure to the isolator/pressure regulator valve. Increasing PC solenoid line pressure increases

transmission line pressure. The TCM varies the current to the line PC solenoid through a low side driver. Decreasing the current to the line PC

solenoid increases line PC solenoid oil pressure by closing OFF the solenoid exhaust port. Increasing the current to the line PC solenoid decreases