2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2741

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2741

1. Engine ON, verify the transmission fluid temperature is between 50-80掳C (122-176掳F).

2. Operate the vehicle long enough to verify at least a 3掳C (5掳F) rise in TCM temperature parameter, then operate the vehicle in Park for 5

seconds.

3. Engine ON, observe the scan tool Clutch PC 2 Sol. CKT Status parameter. The reading should display OK or Indeterminate.

瀚慖f the reading is not within the specified range, replace the control solenoid valve assembly.

Repair Instructions

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

Control Module References (See: Testing and Inspection/Programming and Relearning) for control solenoid valve assembly replacement, setup,

and programming.

6L50/6L80/6L90 - 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

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.