Diagnostic Instructions

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

DTC P0207: Injector 7 Control Circuit

DTC P0208: Injector 8 Control Circuit

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage
Ignition 1 Voltage - Odd Coils Fuse to Splice	P0201, P0203, P0205, P0207¹	P0201, P0203, P0205, P0207¹	--
Ignition 1 Voltage - Even Coils Fuse to Splice	P0202, P0204, P0206, P0208¹	P0202, P0204, P0206, P0208¹	--
Ignition 1 Voltage - Splice to Injectors	¹ ²	²	--
Fuel Injector 1 Control	P0201	P0201	P0201
Fuel Injector 2 Control	P0202	P0202	P0202
Fuel Injector 3 Control	P0203	P0203	P0203
Fuel Injector 4 Control	P0204	P0204	P0204
Fuel Injector 5 Control	P0205	P0205	P0205
Fuel Injector 6 Control	P0206	P0206	P0206
Fuel Injector 7 Control	P0207	P0207	P0207
Fuel Injector 8 Control	P0208	P0208	P0208
¹Open fuse ²Sets individual injector DTC

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

Conditions for Setting the DTC

Action Taken When the DTC Sets

DTCs P0201-P0208 are Type B DTCs.

Conditions for Clearing the MIL/DTC

DTCs P0201-P0208 are Type B DTCs.

Diagnostic Aids

Performing the Fuel Injector Diagnosis may help isolate an intermittent condition. Refer to Fuel Injector Diagnosis.

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Special Tools

J 34730-405 Injector Test Lamp

Circuit/System Verification

With the engine running, observe the scan tool cylinder injector circuit status parameters in Misfire Data. The parameters should display OK.

Circuit/System Testing

1. Remove the engine sight shield.
2. Ignition OFF, disconnect the affected fuel injector harness connector at the fuel injector.
3. Ignition ON, verify that the test lamp illuminates between the ignition 1 voltage circuit terminal A and ground.

⇒	If the test lamp does not illuminate, test the ignition 1 voltage circuit for a short to ground or an open/high resistance.

4. Connect the J 34730-405 Lamp between the control circuit terminal B and the ignition 1 voltage circuit terminal A. Start the engine.

⇒	If the test lamp flashes, replace the fuel injector.

⇒	If the test lamp does not flash, test for an open, high resistance, or a short to voltage in the control circuit of the fuel injector. If the circuit tests normal, replace the ECM.

⇒	If the test lamp remains illuminated at all times, test for a short to ground in the control circuit of the fuel injector. If the circuit tests normal, replace the ECM.

Component Testing

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

Measure for 11-14 ohms between the terminals of the injector.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.