P0201
DTC P0201-P0204
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
-
Cylinder 1 Injector Control Circuit
DTC P0202
-
Cylinder 2 Injector Control Circuit
DTC P0203
-
Cylinder 3 Injector Control Circuit
DTC P0204
-
Cylinder 4 Injector Control Circuit
Diagnostic Fault Information
Circuit/System Description
The control module enables the appropriate fuel injector pulse for each cylinder. Ignition voltage is supplied to the fuel injectors. The control module controls each fuel injector by grounding the control circuit via a solid state device called a driver. The control module monitors the status of each driver. If the control module 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 for greater than 1 s.
* The ignition voltage is greater than 11 V.
* These DTCs run continuously when the above conditions are met.
Conditions for Setting the DTC
* The control module detects an incorrect voltage on the fuel injector control circuit.
* The above condition is met for more than 2.5 s.
Action Taken When the DTC Sets
* DTCs P0201, P0202, P0203, P0204 are Type B DTCs.
* The driver information center displays the Service Traction, Service Electronic Suspension Control, and Electronic Suspension Control OFF messages.
Conditions for Clearing the DTC
DTCs P0201, P0202, P0203, P0204 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 (LE9) [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views Sunshade - Left (DH6)
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 Control Module References for scan tool information
Special Tools
J 44603 - Injector Test Lamp
For equivalent regional tools, refer to Special Tools (Diagnostic Tools) Tools and Equipment.
Circuit/System Verification
1. Engine idling, observe the following control circuit status parameters for each fuel injector:
* Injector Control Circuit Low Voltage Test Status
* Injector Control Circuit Open Test Status
* Injector Control Circuit High Voltage Test Status
Each parameter should display OK or Not Run.
2. Engine running, observe the DTC information with a scan tool. DTCs P0201, P0202, P0203, or P0204 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 harness connector at the appropriate fuel injector.
2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal A 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 a J 44603 - Test Lampbetween the control circuit terminal B and the ignition circuit terminal A of the appropriate fuel injector.
4. Engine cranking, the test lamp should flash.
• If 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).
• If 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
* Fuel Injector Solenoid Coil Test Fuel Injector Solenoid Coil Test
* Fuel Injector Balance Test Fuel Injector Balance Test
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Control Module References Control Module References for replacement, setup, and programming