2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1961

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1961

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

With the ignition ON, engine OFF, command the fuel pump ON and OFF several times using the scan tool output control function. You should

either hear or feel the fuel pump with each command.

Circuit/System Testing

1. With the ignition OFF, disconnect the harness connector at the FPCM.

2. With the ignition ON, engine OFF, probe the control circuit of the fuel pump control module terminal 13 with a test lamp that is connected to

a good ground. Command the fuel pump ON and OFF with a scan tool. The test lamp should turn ON and OFF with each command.

瀚慖f the test lamp does not turn ON and OFF, test for an open, high resistance, or a short to ground in the fuel pump control circuit, an

intermittent or a poor connection at the ECM. If the circuit tests normal, replace the ECM.

瀚慖f the test lamp remains illuminated with each command, test for a short to voltage in the control circuit of the fuel pump control module

or an intermittent or a poor connection at the ECM. If the circuit tests normal, replace the ECM.

3. If all circuits test normal, replace the FPCM.

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 and FPCM replacement, setup, and

programming

Powertrain Managementt

DTC P0230 (LY6)

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 Descriptor

DTC P0230

- Fuel Pump Relay Control Circuit

Diagnostic Fault Information

Circuit/System Description