2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2949

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2949

Circuit/System Description

The torque converter clutch (TCC) pressure control solenoid is part of the control solenoid valve assembly which has no serviceable parts. 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 500 RPM or greater for 5 seconds.

* The ignition voltage is 8.6 volts or greater.

* Transmission fluid temperature is 140掳C (284掳F) or greater.

P2763

* DTCs P2763, P2764, P0658, or P0659 have not set this ignition cycle.

* The engine speed is 500 RPM or greater for 5 seconds.

* The ignition voltage is 8.6 volts or greater.

* The high side driver is enabled.

P2764

* DTC P2764 has not set this ignition cycle.

* The engine speed is 500 RPM or greater for 5 seconds.

* The ignition voltage is 8.6 volts or greater.

* The high side driver is enabled.

* Transmission fluid temperature is 140掳C (284掳F) or greater.

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 1 minute.

Action Taken When the DTC Sets

P2762

DTC P2762 is a Type C DTC.

P2763 or P2764

* DTCs P2763 and P2764 are Type A DTCs.

* The TCM inhibits TCC.

* The TCM commands maximum line pressure.