2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2865

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2865

Conditions for Running the DTC

P2120, P2122, P2123, P2125, P2127, P2128

* DTC P0641 and P0651 are not set.

* The run/crank or powertrain relay voltage is greater than 6 V and reduced power is not active.

* The ignition is in the Unlock/Accessory or Run position.

* DTC P2120, P2122, P2123, P2125, P2127, P2128 run continuously when the above conditions are met.

P2138

* DTC P0641, P0651, P2120, P2125 are not set.

* The system voltage is greater than 5.23 V.

* The ignition is in the Unlock/Accessory or Run position.

* DTC P2138 runs continuously when the above conditions are met.

Conditions for Setting the DTC

P2120

The APP sensor 1 voltage is less than 0.325 V, or greater than 4.75 V for greater than 0.4 s.

P2122

The ECM detects that the APP sensor 1 voltage is less than 0.325 V for greater than 0.4 s.

P2123

The ECM detects that the APP sensor 1 voltage is greater than 4.75 V for greater than 0.4 s.

P2125

The APP sensor 2 voltage is less than 0.325 V, or greater than 4.75 V for greater than 0.4 s.

P2127

The ECM detects that the APP sensor 2 voltage is less than 0.325 V for greater than 0.4 s.

P2128

The ECM detects that the APP sensor 2 voltage is greater than 4.75 V for greater than 0.4 s.

P2138

The voltage difference between APP sensor 1 and APP sensor 2 exceeds a predetermined value for greater than 2 s.

Action Taken When the DTC Sets

* DTCs P2120, P2122, P2123, P2125, P2127, P2128, and P2138 are Type A DTCs.

* The control module commands the TAC system to operate in the Reduced Engine Power mode.

* A message center or an indicator displays Reduced Engine Power.

* Under certain conditions the control module commands the engine OFF.

Conditions for Clearing the MIL/DTC

DTCs P2120, P2122, P2123, P2125, P2127, P2128, and P2138 are Type A DTCs.

Reference Information

Schematic Reference

Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Description and Operation

Throttle Actuator Control (TAC) System Description (See: Powertrain Management/Computers and Control Systems/Description and

Operation/Throttle Actuator Control (TAC) System Description)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit