2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1684

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1684

(DTC) Type Definitions)

Scan Tool Reference

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

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the K27 fuel pump control module.

2. Ignition OFF, connect a test lamp between the control circuit terminal 13 and ground.

3. Ignition ON, command the fuel pump ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the

commanded states.

瀚慖f the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.

瀚慖f the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the K20 ECM.

4. If all circuits test normal, replace the K27 fuel pump control module.

Repair Instructions

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

Control Module References (See: Testing and Inspection/Programming and Relearning)for ECM or fuel pump control module replacement, setup,

and programming

P0030

DTC P0030, P0036, P0050, P0053, P0054, P0056, P0059, P0060, P0135, P0141, P0155, or P0161

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 P0030

- HO2S Heater Control Circuit Bank 1 Sensor 1

DTC P0036

- HO2S Heater Control Circuit Bank 1 Sensor 2

DTC P0050

- HO2S Heater Control Circuit Bank 2 Sensor 1

DTC P0053

- HO2S Heater Resistance Bank 1 Sensor 1

DTC P0054

- HO2S Heater Resistance Bank 1 Sensor 2

DTC P0056

- HO2S Heater Control Circuit Bank 2 Sensor 2

DTC P0059

- HO2S Heater Resistance Bank 2 Sensor 1

DTC P0060

- HO2S Heater Resistance Bank 2 Sensor 2

DTC P0135

- HO2S Heater Performance Bank 1 Sensor 1

DTC P0141

- HO2S Heater Performance Bank 1 Sensor 2