P0204
DTC P0201, P0202, P0203, P0204, P0205, or P0206
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions)provides an overview of each diagnostic category.
DTC Descriptors
DTC P0201
- Injector 1 Control Circuit
DTC P0202
- Injector 2 Control Circuit
DTC P0203
- Injector 3 Control Circuit
DTC P0204
- Injector 4 Control Circuit
DTC P0205
- Injector 5 Control Circuit
DTC P0206
- Injector 6 Control Circuit
Diagnostic Fault Information
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. If the ECM detects an incorrect voltage for the commanded state of the driver, a fuel injector control circuit DTC sets.
Conditions for Running the DTC
* The engine is running.
* The ignition voltage is more than 11 V for 5 seconds.
* DTC P0201-P0206 runs continuously when the above conditions are met.
Conditions for Setting the DTC
* The ECM detects an incorrect voltage on the fuel injector control circuit.
* The above condition is met for 1 second.
Action Taken When the DTC Sets
DTC P0201-P0206 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTC P0201-P0206 are Type B DTCs.
Diagnostic Aids
Performing the Fuel Injector Solenoid Coil Test may help isolate an intermittent condition. Refer to Fuel Injector Solenoid Coil Test (Fuel Injector Solenoid Coil Test).
Reference Information
Schematic Reference
Engine Controls Schematics ([1][2]Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector End Views By Name)
Electrical Information Reference
* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Powertrain Diagnostic Trouble Code (DTC) Type Definitions)
Scan Tool Reference
Control Module References (Programming and Relearning)for scan tool information
Special Tools
J 35616-200 - Test Light Probe Kit
Circuit/System Verification
1. Engine idling, observe the following control circuit status parameters for each fuel injector:
* Injector Ckt Short Gnd Test Status
* Injector Ckt Open Test Status
* Injector Ckt Short Volts Test Status
2. Engine running, observe the DTC information with a scan tool. DTC P0201, P0202, P0203, P0204, P0205, or P0206 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 X102 fuel injector multi-way connector.
2. Ignition ON, verify that the J 35616-200 - Test Light illuminates between the ignition circuit terminal A ECM harness side and ground
• If the test lamp does not illuminate, test the ignition circuit for a short to ground, or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, test or replace the fuel injector.
3. Ignition OFF, connect the J 35616-200 - Test Light between the ignition circuit terminal A and the control circuit ECM harness side, of the appropriate injector listed below:
* Injector 1 terminal C
* Injector 2 terminal D
* Injector 3 terminal E
* Injector 4 terminal F
* Injector 5 terminal G
* Injector 6 terminal H
4. Engine cranking, the test lamp should flash for each injector.
• If the test lamp is always ON, test the appropriate control circuit for a short to ground. If the circuit tests normal, replace the ECM.
• If the test lamp is always OFF, test the appropriate control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM.
5. Ignition OFF, measure for 10-15 ohm on the engine harness side of X102 between the ignition circuit terminal A and the control circuit of the appropriate injector listed below:
* Injector 1 terminal C
* Injector 2 terminal D
* Injector 3 terminal E
* Injector 4 terminal F
* Injector 5 terminal G
* Injector 6 terminal H
• If the resistance is not within the specified range, test for a short to ground or an open/high resistance between X102 and the appropriate fuel injector harness connector. If the circuits test normal, test or replace the affected fuel injector.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Control Module References (Programming and Relearning)for ECM replacement, setup, and programming
* Fuel Injector Replacement (Service and Repair)