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	Signal Performance
Ignition 1 Voltage - INJ Fuse A	P0201, P0203, P0205, P0207,	P0201, P0203, P0205, P0207,	--	--
Ignition 1 Voltage - INJ Fuse B	P0202, P0204, P0206, P0208	P0202, P0204, P0206, P0208	--	--
Injector 1 Control Circuit	P0201	P0201	P0201	--
Injector 2 Control Circuit	P0202	P0202	P0202	--
Injector 3 Control Circuit	P0203	P0203	P0203	--
Injector 4 Control Circuit	P0204	P0204	P0204	--
Injector 5 Control Circuit	P0205	P0205	P0205	--
Injector 6 Control Circuit	P0206	P0206	P0206	--
Injector 7 Control Circuit	P0207	P0207	P0207	--
Injector 8 Control Circuit	P0208	P0208	P0208	--

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

Conditions for Setting the DTC

The ECM detects the injector control circuit is open, shorted to voltage, or shorted to ground for greater than 1 second.

Action Taken When the DTC Sets

DTCs P0201, P0202, P0203, P0204, P0205, P0206, and P0208 are Type B DTCs.

Conditions for Clearing the DTC

DTCs P0201, P0202, P0203, P0204, P0205, P0206, and P0208 are Type B DTCs.

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Electrical Information Reference

DTC Type Reference

Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Engine Control Module Scan Tool Information

Special Tools

J 34730-405 Injector Test Lamp

Circuit/System Verification

1. Engine idling, observe the DTC information with a scan tool. DTCs P0201, P0202, P0203, P0204, P0205, P0206, P0207, or P0208 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 A 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 B and the ignition 1 voltage circuit terminal A.
4. Engine idling, 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 A and the control terminal B.

⇒	If not within the specified range, replace the fuel injector.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.