Test Description

WARNING: This page is about a different variant/trim than selected.

The numbers below refer to the step numbers on the diagnostic table.

4: This step tests for a short to voltage on the fuel injector control circuit.
6: This step inspects for fuel injector harness damage between the multi-way connector and the intake plenum. Careful inspection may isolate the condition before removal of the intake plenum.
7: This step isolates the control circuit between the multi-way connector and the fuel injector. A short to voltage on the fuel injector control circuit will set this DTC.

DTC P0262, P0265, P0268, P0271, P0274, or P0277

Step	Action	Yes	No
Schematic Reference: Engine Controls Schematics Connector End View Reference: Engine Control Module (ECM) Connector End Views or Engine Controls Connector End Views
1	Did you perform the Diagnostic System Check-Engine Controls?	Go to Step 2	Go to Diagnostic System Check - Engine Controls
2	Clear the DTCs with a scan tool. Attempt to start the engine. Does a fuel injector DTC set?	Go to Step 4	Go to Step 3
3	Observe the Freeze Frame/Failure Records data for this DTC. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition?	Go to Step 4	Go to Diagnostic Aids
4	Turn OFF the ignition. Disconnect the fuel injector harness multi-way connector. Probe the appropriate fuel injector control circuit, ECM side, with a test lamp connected to a good ground. Turn ON the ignition, with the engine OFF. Does the test lamp illuminate?	Go to Step 5	Go to Step 6
5	Test the control circuit of the fuel injector for a short to voltage between the multi-way connector and the ECM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 13	Go to Step 9
6	Inspect the accessible fuel injector jumper harness between the multi-way connector and the plenum for damaged or pinched wiring. Refer to Wiring Repairs and Circuit Testing in Wiring Systems. Did you find and correct the condition?	Go to Step 13	Go to Step 7
7	Turn OFF the ignition. Remove the upper intake. Refer to Intake Plenum Replacement in Engine Mechanical. Probe the affected fuel injector control circuit, fuel injector side, at the multi-way connector, with a test lamp connected to a good ground. Turn ON the ignition, with the engine OFF. Does the test lamp illuminate?	Go to Step 8	Go to Step 10
8	Test the control circuit of the fuel injector for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 13	Go to Step 11
9	Test for an intermittent and for a poor connection at the harness connector of the ECM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 13	Go to Step 12
10	Test for an intermittent and for a poor connection at the harness connector of the affected fuel injector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 13	Go to Step 11
11	Replace the affected fuel injector. Refer to Fuel Injectors and Fuel Rail Replacement . Did you complete the replacement?	Go to Step 13	-
12	Replace the ECM. Refer to Engine Control Module (ECM) Replacement . Did you complete the replacement?	Go to Step 13	-
13	Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition?	Go to Step 2	Go to Step 14
14	Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed?	Go to Diagnostic Trouble Code (DTC) List	System OK