Tuesday, January 28, 2020

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1732

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1732



* 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



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



P0969



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



* The ignition voltage is 8.6 volts or greater.



* DTC P0969 has not set this ignition cycle.



P0970



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



* The ignition voltage is 8.6 volts or greater.



* DTC P0970 has not set this ignition cycle.



P0971



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



* The ignition voltage is 8.6 volts or greater.



* DTC P0971 has not set this ignition cycle.



Conditions for Setting the DTC



P0969



The TCM detects an internal electrical performance malfunction of the clutch PC solenoid 3 control circuit where the measured clutch PC solenoid



3 currents does not equal the commanded clutch PC solenoid 3 current for 5 seconds.

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