Without Variable Camshaft Phasing
DTC P0201, P0202, P0203, or P0204
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) 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
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.
Conditions for Running the DTC
* The engine speed is greater than 700 RPM for Euro III Emissions or 600 RPM for Euro IV Emissions.
* The ignition 1 voltage is greater than 9 volts.
* The DTCs run continuously once the above conditions are met.
Conditions for Setting the DTC
The ECM detects the injector control circuit is open, shorted to voltage, or shorted to ground for more than 5 seconds.
Action Taken When the DTC Sets
DTCs P0201, P0202, P0203, P0204 are Type A DTCs.
Conditions for Clearing the DTC
DTCs P0201, P0202, P0203, P0204 are Type A DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics (Electrical Diagrams)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Diagnostic Trouble Code Descriptions)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Special Tools
J 34730-405 Injector Test Lamp
Circuit/System Verification
1. Engine running, observe the DTC information with a scan tool. DTCs P0201, P0202, P0203, or P0204 should not set.
2. 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 harness connector at the appropriate fuel injector.
2. Ignition ON, verify that a test lamp illuminates between the ignition 1 voltage circuit terminal 1 and ground.
• If the test lamp does not illuminate, repair the ignition 1 voltage circuit for a short to ground or an open/high resistance. Replace the fuse if necessary.
3. Ignition OFF, connect a J 34730-405 between the control circuit terminal 2 and the ignition 1 voltage circuit terminal 1.
4. Engine running, the test lamp should flash.
• If the test lamp is always ON, test the control circuit for a short to ground. If circuit tests normal, replace the ECM.
• If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If circuit tests normal, replace the ECM.
5. If all circuits test normal, test or replace the fuel injector.
Component Testing
1. Ignition OFF, disconnect the harness connector at the appropriate fuel injector.
Important: The engine coolant temperature (ECT) sensor must be between 10-32°C (50-90°F) in order for an accurate measurement.
2. Test for 11-14 ohms between the ignition 1 voltage terminal 1 and the control terminal 2.
• If not within the specified range, replace the fuel injector.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Fuel Injection Fuel Rail Assembly Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for engine control module replacement, setup, and programming