2010 Cadillac Truck SRX FWD V6-3.0L Page 1830

2010 Cadillac Truck SRX FWD V6-3.0L Page 1830

Static Test

1. Ignition OFF, remove the K71 Transmission Control Module.

2. Test for 5-5.6 ohm at 20掳C (68掳F) between the low reference circuit terminal 18 X2 and the voltage supply circuit terminal 17 X2.

瀚慖f less than the specified range, test the wiring harness for internal short. If the circuit test normal, replace the Q27B Pressure Control

Solenoid Valve 2.

3. Test for infinite resistance between each terminal and the low reference circuit terminal 18 X2 and also to the voltage supply circuit terminal

17 X2.

瀚慖f less than the specified range, replace the wiring harness.

4. If all circuit test normal, perform the Control Solenoid Valve Inspection (M36 and MXE) (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/AF40-6 - Automatic Transmission).

瀚慖f the inspection test normal, replace the control valve body.

Repair Instructions

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

* Control valve body replacement-Refer to Control Valve Body Replacement (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Valve Body/Service and Repair/AF40-6 - Automatic Transmission/Control Valve Body Replacement) for

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 P0969-P0971

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 P0969

- Clutch Pressure Control (PC) Solenoid 3 System Performance

DTC P0970

- Clutch Pressure Control (PC) Solenoid 3 Control Circuit Low Voltage

DTC P0971

- Clutch Pressure Control (PC) Solenoid 3 Control Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

The clutch pressure (PC) solenoid 3 is part of the control solenoid valve assembly, which has no serviceable components. The normally high clutch

PC solenoid 3 regulates and directs the clutch PC solenoid 3 oil pressure to the R1/4-5-6 clutch regulator valve and 4-5-6 clutch boost valve.

Increasing clutch PC solenoid 3 oil pressure increases oil pressure to the low and reverse clutch or the 4-5-6 clutch, depending on the position of

the clutch select valve 2. The TCM varies the current to the PC solenoid 3 through a low side driver. Decreasing the current to the clutch PC

solenoid 3 increases clutch PC solenoid 3 oil pressure by closing OFF the solenoid exhaust port. Increasing the current to the clutch PC solenoid 3,

decreases clutch PC solenoid 3 oil pressure by opening the solenoid exhaust port. Clutch PC solenoid 3 power is supplied by the TCM through a