2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2846

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2846

瀚慖f less than the specified range, test the APP sensor 1 signal circuit for a short to ground or an open/high resistance. If the circuit tests

normal, replace the ECM.

6. Install a 3 A fused jumper wire between the APP sensor 2 signal circuit terminal B and the 5-volt reference circuit terminal D. Verify the scan

tool APP sensor 2 voltage parameter is greater than 4.8 V.

瀚慖f less than the specified range, test the APP sensor 2 signal circuit for an open/high resistance or short to ground. If the circuit tests

normal, replace the ECM.

7. If all circuits and connections test normal, test or replace the Accelerator Pedal Position Sensor.

Repair Instructions

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

* Accelerator Pedal Position Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position

Sensor/Service and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming

P2123

DTC P2120, P2122, P2123, P2125, P2127, P2128, or P2138

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) provide an overview of each diagnostic category.

DTC Descriptors

DTC P2120

- Accelerator Pedal Position (APP) Sensor 1 Circuit

DTC P2122

- Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage

DTC P2123

- Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage

DTC P2125

- Accelerator Pedal Position (APP) Sensor 2 Circuit

DTC P2127

- Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage

DTC P2128

- Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage

DTC P2138

- Accelerator Pedal Position (APP) Sensor 1-2 Correlation

Diagnostic Fault Information

Typical Scan Tool Data