2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1930

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1930

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

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

Special Tools

J 34730-405 Injector Test Lamp

Circuit/System Verification

1. Engine idling, observe the following control circuit status parameters for each fuel injector:

* Cyl 1-8 Injector Ckt Short Gnd Test Status

* Cyl 1-8 Injector Ckt Open Test Status

* Cyl 1-8 Injector Ckt Short Volts Test Status

Each parameter should display OK or Not Run.

2. Engine running, observe the DTC information with a scan tool. DTC P0201, P0202, P0203, P0204, P0205, P0206, P0207 or P0208 should

not set.

3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

1. Ignition OFF, disconnect the affected fuel injector harness connector at the fuel injector.

2. Ignition ON, verify that a test lamp illuminates between the ignition voltage circuit terminal A and ground.

瀚慖f the test lamp does not illuminate, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests

normal and the ignition voltage circuit fuse is open, test or replace the fuel injector.

3. Connect the J 34730-405 between the control circuit terminal B and the ignition voltage circuit terminal A.

4. Command the fuel injector 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 ground. If the circuit tests normal, replace the engine control module

(ECM).

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

the ECM.

5. If all circuits test normal, test or replace the fuel injector.

Component Testing

Note: The engine coolant temperature (ECT) sensor must be between 10-32掳C (50-90掳F) for an accurate measurement.

Measure for 11-14 ohm between the terminals of the fuel injector.

If not within the specified range, replace the fuel injector.

Repair Instructions

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

* Fuel Injector Replacement (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Service and Repair/Removal and

Replacement)

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

P0206

DTC P0201, P0202, P0203, P0204, P0205, P0206, P0207, or P0208