Thursday, February 3, 2022

2010 Cadillac Truck SRX FWD V6-3.0L Page 1802

2010 Cadillac Truck SRX FWD V6-3.0L Page 1802



replacement, setup and programming.



* TCM-Refer to Control Module References (See: Testing and Inspection/Programming and Relearning) for replacement, setup and



programming.



* Perform the Transmission Adaptive Functions (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and



Operation/AF40-6 - Automatic Transmission/Transmission Adaptive Functions).



* Wiring harness-Refer to Automatic Transmission Wiring Harness Replacement (See: Transmission and Drivetrain/Automatic



Transmission/Transaxle/Wiring Harness/Service and Repair) for replacement.



6T70/6T75 - Automatic Transmission



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



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