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
