2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1833

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1833

K20 ECM.

4. Observe the scan tool APP sensor 1 voltage parameter. Verify the voltage is less than 0.3 V.

瀚慖f greater than the specified range, test the signal circuit terminal 3 for a short to voltage. If the circuit/connections test normal, replace the

K20 ECM.

5. Observe the scan tool APP sensor 2 voltage parameter. Verify the voltage is less than 0.3 V.

瀚慖f greater than the specified range, test the signal circuit terminal 6 for a short to voltage. If the circuit/connections test normal, replace the

K20 ECM.

6. Connect a 3 A fused jumper wire between the APP sensor 1 signal circuit terminal 3 and the 5-volt reference circuit terminal 2. Verify the

APP sensor 1 voltage parameter is greater than 4.8 V.

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

normal, replace the K20 ECM.

7. Connect a 3 A fused jumper wire between the APP sensor 2 signal circuit terminal 6 and the 5-volt reference circuit terminal 1. Verify the

APP sensor 2 voltage parameter is greater than 4.8 V.

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

normal, replace the K20 ECM.

8. If all circuits/connections test normal, test or replace the B107 accelerator pedal assembly.

Repair Instructions

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

* Accelerator Pedal with Position Sensor Assembly Replacement (See: Powertrain Management/Fuel Delivery and Air Induction/Accelerator

Pedal/Service and Repair/Accelerator Pedal with Position Sensor Assembly Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for engine control module replacement,

programming, and setup

P2127

DTC P2122, P2123, P2127, P2128, or P2138 (Without LF1, LFW)

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) provides an overview of each diagnostic category.

DTC Descriptors

DTC P2122

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

DTC P2123

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

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) Sensors 1-2 Not Plausible

Diagnostic Fault Information