P0265

DTC P0265

DTC DESCRIPTORS

DTC P0261
Injector 1 Control Circuit Low Voltage

DTC P0262
Injector 1 Control Circuit High Voltage

DTC P0264
Injector 2 Control Circuit Low Voltage

DTC P0265
Injector 2 Control Circuit High Voltage

DTC P0267
Injector 3 Control Circuit Low Voltage

DTC P0268
Injector 3 Control Circuit High Voltage

DTC P0270
Injector 4 Control Circuit Low Voltage

DTC P0271
Injector 4 Control Circuit High Voltage

DIAGNOSTIC FAULT INFORMATION




Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Testing and Inspection

CIRCUIT/SYSTEM DESCRIPTION
The engine control module (ECM) enables the appropriate fuel injector pulse for each cylinder. Ignition voltage is supplied to the fuel injectors. The ECM controls each fuel injector by grounding the control circuit via a solid state device called a driver. The ECM monitors the status of each driver.

CONDITIONS FOR RUNNING THE DTC
- The engine is running.
- The ignition 1 voltage is between 7.5-16 volts.
- The DTCs run continuously once the above conditions are met.

CONDITIONS FOR SETTING THE DTC

P0261, P0264, P0267, or P0270
The ECM detects the injector control circuit is open or shorted to ground.

P0262, P0265, P0268, or P0271
The ECM detects the injector control circuit is shorted to voltage.

ACTION TAKEN WHEN THE DTC SETS
DTC P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271 are Type B DTCs.

CONDITIONS FOR CLEARING THE DTC
DTC P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271 are Type B DTCs.

CIRCUIT/SYSTEM VERIFICATION
1. Engine running, observe the DTC information with a scan tool. DTC P0261, P0262, P0264, P0265, P0267, P0268, P0270, or P0271 should not set.
2. If the vehicle passes the Circuit/System Verification Test, then operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records List.

CIRCUIT/SYSTEM TESTING
1. Ignition OFF, disconnect the harness connector of the appropriate fuel injector.
2. Connect a test lamp between the ignition 1 voltage circuit of the fuel injector and ground.

IMPORTANT: The test lamp is used to load the circuit and may not illuminate.

3. Ignition ON, test for less than 0.1 volt between the ignition 1 voltage circuit of the fuel injector and the battery voltage.
- If greater than 0.1 volt, repair the ignition 1 voltage circuit of the fuel injector for a short to ground or an open/high resistance.
4. With the ignition OFF, connect a J 34730-405 between the control circuit and the ignition 1 voltage circuit of the fuel injector.
5. Engine running, the test lamp should flash.
- If the test lamp remains ON all the time, test for a short to ground on the control circuit. If circuit/connections test normal, replace the ECM.
- If the test lamp remains OFF all the time, test for a short to voltage or an open/high resistance on the control circuit. If circuit/connections test normal, replace the ECM.
6. If all circuits/connections test normal, test or replace the fuel injector.

COMPONENT TESTING
1. Measure for 11-14 ohms of resistance between the terminals of the fuel injector.

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

- If the resistance is not within the specified range, replace the fuel injector.

REPAIR INSTRUCTIONS
Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests