2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1955

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1955

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

Action Taken When the DTC Sets

* DTC P0120, P0122, P0123, P0220, P0222, P0223, and P2135 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 P0120, P0122, P0123, P0220, P0222, P0223, and P2135 are Type A DTCs.

Diagnostic Aids

* If the Throttle Sweep Test is not available on the scan tool, observe the scan tool TP Sensor 1 and 2 Agree/Disagree parameter while

performing the following tests:

- Slowly depress the accelerator pedal to WOT and then slowly return the pedal to closed throttle. Repeat the procedure several times.

- Rapidly depress the accelerator pedal from the rest position to the wide open throttle position (WOT) and release pedal. Repeat the

procedure several times.

The TP Sensor 1 and 2 Agree/Disagree parameter should display Agree. If Disagree is displayed, continue diagnosis in Circuit/System

Testing.

* A high resistance condition on the throttle position and throttle actuator control circuits could cause a DTC to set.

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

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

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

Repairs/Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

1. Ignition ON, observe the DTC information with a scan tool. Verify that DTC P0641 or P0651 are not set.

瀚慖f a DTC is set, refer to DTC P0641 or P0651 (ECM) (See: P Code Charts/P0641) for further diagnosis.

2. Observe the TP sensor 1 and 2 voltage parameters. Both parameters should be between 1.0-4.0 V and change with accelerator pedal input.

Note: If the Throttle Sweep Test is not available on the scan tool, use the accelerator to perform the test. Refer to Diagnostic Aids for further

details.

3. Perform the Throttle Sweep Test while observing the TP Sensor 1 and 2 Agree/Disagree parameter with a scan tool. The TP Sensor 1 and 2

Agree/Disagree parameter should display Agree.