2010 Cadillac Truck SRX FWD V6-3.0L Page 2134

2010 Cadillac Truck SRX FWD V6-3.0L Page 2134

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 P2762

- Torque Converter Clutch (TCC) Pressure Control Solenoid System Performance

DTC P2763

- Torque Converter Clutch (TCC) Pressure Control Solenoid Control Circuit High Voltage

DTC P2764

- Torque Converter Clutch (TCC) Pressure Control Solenoid Control Circuit Low Voltage

Diagnostic Fault Information

Circuit/System Description

The torque converter clutch (TCC) pressure control (PC) solenoid is part of the control solenoid valve assembly, which has no serviceable

components. The normally low TCC PC solenoid regulates oil pressure to the TCC regulator valve and TCC control valve. Increasing TCC PC

solenoid oil pressure increases oil pressure to the torque converter to apply the clutch. The TCM varies the current to the TCC PC solenoid through

a low side driver. Increasing current to the TCC PC solenoid increase oil pressure by closing OFF the solenoid exhaust port. Decreasing current to

the TCC PC solenoid decreases oil pressure by opening up the solenoid exhaust port. The TCC PC solenoid 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

P2762

* DTC P2762 has not set this ignition cycle.

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

* The ignition voltage is 8.6 volts or greater.

P2763

* No DTCs P0658, P0659 or P2763.

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

* The ignition voltage is 8.6 volts or greater.

* The high side driver is enabled.

P2764

* No DTCs P0658, P0659 or P2764.

* The engine speed is 400 RPM for 5 seconds.

* The ignition voltage is 8.6 volts or greater.

* The high side driver is enabled.

Conditions for Setting the DTC

P2762

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

current does not equal the commanded TCC PC solenoid for 5 seconds.

P2763

The TCM detects an open/high resistance or short to voltage on the TCC pressure solenoid control circuit for 5 seconds.

P2764

The TCM detects a short to ground on the TCC pressure solenoid control circuit for 5 seconds.

Action Taken When the DTC Sets