2010 Cadillac CTS Sedan AWD V6-3.6L Page 1743
Inspection/Programming and Relearning/Service Fast Learn Adapts) following all transmission related repairs.
* Replace the Q8, K71 control solenoid valve assembly. Refer to Control Module References (See: Testing and Inspection/Programming and
Relearning) for replacement, setup, and programming.
P0971
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
Typical Scan Tool Data
Circuit/System Description
The clutch pressure (PC) solenoid 3 is part of the control solenoid valve assembly which has no serviceable parts. The normally high clutch PC
solenoid 3 regulates and directs the clutch PC solenoid 3 oil pressure to the 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 4-5-6 clutch assembly. 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, P0970, or P0971
* DTCs P0969, P0970, or P0971 have not set this ignition.
* The ignition voltage is 8.6 volts or greater.
* The engine speed is 500 RPM or greater for 5 seconds.
* The clutch PC solenoid 3 is commanded ON.
Conditions for Setting the DTC
