2010 Cadillac CTS Sedan AWD V6-3.0L Page 1708

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1708

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 P0965

- Clutch Pressure Control (PC) Solenoid 2 System Performance

DTC P0966

- Clutch Pressure Control (PC) Solenoid 2 Control Circuit Low Voltage

DTC P0967

- Clutch Pressure Control (PC) Solenoid 2 Control Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

The clutch pressure (PC) solenoid 2 is part of the control solenoid valve assembly which has no serviceable parts. The normally high clutch PC

solenoid 2 regulates and directs the clutch PC solenoid 2 oil pressure to the 3-5 reverse clutch regulator valve and 3-5 reverse clutch boost valve.

Increasing clutch PC solenoid 2 pressure increases pressure to the 3-5 reverse clutch. The TCM varies the current to the PC solenoid 2 through a

low side driver. Decreasing the current to the clutch PC solenoid 2 increases clutch PC solenoid 2 oil pressure by closing OFF the solenoid exhaust

port. Increasing the current to the clutch PC solenoid 2, decreases clutch PC solenoid 2 oil pressure by opening the solenoid exhaust port. Clutch

PC solenoid 2 power is supplied by the TCM through a high side driver (HSD). The HSD protects the circuit and components from excessive

current flow. If excessive current flow is detected, the HSD will turn OFF. When the fault is corrected, the HSD will reset.

Conditions for Running the DTC

P0965, P0966, or P0967

* DTCs P0965, P0966, or P0967 have not set this ignition.

* The ignition voltage is 8.6 volts or greater.

* The engine run time is greater than 5 seconds.

* The clutch PC solenoid 2 is commanded ON.

Conditions for Setting the DTC

P0965

The TCM detects an internal electrical performance malfunction of the clutch PC solenoid 2 control circuit where the measured clutch PC solenoid

2 current does not equal the commanded clutch PC solenoid 2 current for 5 seconds.

P0966

The TCM detects a short to ground on the clutch PC solenoid 2 control circuit for 1 second.