Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptors
DTC P0201: Fuel Injector 1 Control CircuitDTC P0202: Fuel Injector 2 Control Circuit
DTC P0203: Fuel Injector 3 Control Circuit
DTC P0204: Fuel Injector 4 Control Circuit
DTC P0205: Fuel Injector 5 Control Circuit
DTC P0206: Fuel Injector 6 Control Circuit
DTC P0207: Fuel Injector 7 Control Circuit
DTC P0208: Fuel Injector 8 Control Circuit
Diagnostic Fault Information
Fuel Injector Circuits | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance |
|---|---|---|---|---|---|
Fuel Injector Positive Voltage Control Group 1 | P2146 | P2146 | P0201, P0204¹ | P1233, P1224, P2146 | -- |
Fuel Injector Positive Voltage Control Group 2 | P2149 | P2149 | P0206, P0207¹ | P1239, P1242, P2149 | -- |
Fuel Injector Positive Voltage Control Group 3 | P2152 | P2152 | P0202, P0205¹ | P1227, P1236, P2152 | -- |
Fuel Injector Positive Voltage Control Group 4 | P2155 | P2155 | P0203, P0208¹ | P122A, P1247, P2155 | -- |
Fuel Injector 1 Control | P1233, P2146 | P2146 | P0201 | P1224, P2146 | -- |
Fuel Injector 2 Control | P1236, P2152 | P2152 | P0202 | P1227, P2152 | -- |
Fuel Injector 3 Control | P1247, P2155 | P2155 | P0203 | P122A, P2155 | -- |
Fuel Injector 4 Control | P1224, P2146 | P2146 | P0204 | P1233, P2146 | -- |
Fuel Injector 5 Control | P1227, P2152 | P2152 | P0205 | P1236, P2152 | -- |
Fuel Injector 6 Control | P1242, P2149 | P2149 | P0206 | P1239, P2149 | -- |
Fuel Injector 7 Control | P1239, P2149 | P2149 | P0207 | P1242, P2149 | -- |
Fuel Injector 8 Control | P122A, P2155 | P2155 | P0208 | P1247, P2155 | -- |
¹ Misfire DTCs may also set. | |||||
Circuit/System Description
The engine control module (ECM) supplies voltage to each fuel injector on the injector positive voltage control circuits. The ECM energizes each fuel injector by grounding the control circuit of that fuel injector. The ECM monitors the status of the injector positive voltage control circuits and the fuel injector control circuits. The injectors are separated into the following four groups:
| • | Group 1-DTC P2146 with injectors 1 and 4 |
| • | Group 2-DTC P2149 with injectors 6 and 7 |
| • | Group 3-DTC P2152 with injectors 2 and 5 |
| • | Group 4-DTC P2155 with injectors 3 and 8 |
When a fuel injector circuit condition is detected by the ECM, the affected fuel injectors will be disabled and may disable the affected group of fuel injectors.
Conditions for Running the DTC
| • | The engine is running. |
| • | The charging system voltage is between 10-18 volts. |
Conditions for Setting the DTC
| • | The ECM injector output driver detects an incorrect current on a fuel injector circuit. |
| • | The condition exists for 1 second. |
Action Taken When the DTC Sets
DTCs P0201, P0202, P0203, P0204, P0205, P0206, P0207, and P0208 are Type A DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0201, P0202, P0203, P0204, P0205, P0206, P0207, and P0208 are Type A DTCs.
Reference Information
Schematic Reference
Connector End View Reference
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Circuit/System Testing
Important: If you cannot duplicate the condition, operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.
Observe the DTC information with a scan tool. If DTC P2146, P2149, P2152 or P2155 are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
One Fuel Injector DTC Sets
- Test the affected fuel injector control circuit for an open between the ECM and the fuel injector.
- Test the affected fuel injector for high resistance. Refer to Component Testing in this diagnostic.
| ⇒ | If the circuit and fuel injector test normal, replace the ECM. |
Two or More Fuel Injector DTCs Set
- Test the affected fuel injector circuit for an following:
- Test the affected fuel injector for high resistance. Refer to Component Testing in this diagnostic.
| • | An open between the ignition position voltage control circuit splice and the fuel injector connector |
| • | An open between the ECM and the ignition positive voltage control circuit splice |
| ⇒ | If the circuit and fuel injector test normal, replace the ECM. |
Component Testing
- Disconnect the connector of the fuel injector to be tested.
- Connect a DMM between the terminals of the fuel injector and measure the resistance. The resistance should be 0.2-0.3 ohms.
| ⇒ | If the resistance is more than 0.2-0.3 ohms resistance, replace the fuel injector. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for ECM replacement, programing and setup |
