2010 Cadillac Truck SRX FWD V6-3.0L Page 1797

2010 Cadillac Truck SRX FWD V6-3.0L Page 1797

Circuit/System Description

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

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

pressure increases transmission line pressure. The transmission control module (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 line PC oil pressure by opening the solenoid exhaust port. Line PC solenoid 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

* The engine speed is greater than 400 RPM for 5 seconds.

* The ignition voltage is 8.6 volts or greater.

Conditions for Setting the DTC

P0961

The TCM detects an internal electrical malfunction of the line PC solenoid where the measured line PC solenoid current does not equal the

commanded line PC solenoid current for 5 seconds.

P0962

The TCM detects a short to ground or an open/high resistance on the line PC solenoid control circuit for 1 second.

P0963

The TCM detects an open or a short to voltage on the line PC solenoid control circuit for 1 second.

Action Taken When the DTC Sets

P0961 or P0963

* DTCs P0961 and P0963 are Type C DTCs.

* The TCM freezes transmission adaptive functions.

* The TCM commands maximum line pressure.

P0962

* DTC P0962 is a Type A DTC.

* The TCM defaults the transmission to reverse and 5th gear.

* The TCM inhibits the torque converter clutch (TCC).

* The TCM commands maximum line pressure.

* The TCM freezes transmission adaptive functions.

* The TCM turns the high side driver OFF.

* The TCM inhibits Tap Up/Down function.

* The TCM inhibits manual shifting of forward gears.

* The TCM enables torque management.

Conditions for Clearing the DIC/DTC

* DTCs P0961 and P0963 are Type C DTCs.

* DTC P0962 is a Type A DTC.

Reference Information

Connector End View Reference

* Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

* Inline Harness Connector End Views (See: Diagrams/Connector Views/Multiple Junction Connector/Connector End Views By Number)

Description and Operation

Transmission General Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and Operation/6T70/6T75 -

Automatic Transmission/Transmission General Description)

Electrical Information Reference