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2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1726

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1726



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

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