• | 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. |
Fuel Injector Circuits | Short to Ground | High Resistance | Open | Short to Voltage |
---|---|---|---|---|
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. |
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.
• | The engine is running. |
• | The charging system voltage is between 10-18 volts. |
• | The ECM injector output driver detects an incorrect current on a fuel injector circuit. |
• | The condition exists for 1 second. |
DTCs P0201, P0202, P0203, P0204, P0205, P0206, P0207, and P0208 are Type A DTCs.
DTCs P0201, P0202, P0203, P0204, P0205, P0206, P0207, and P0208 are Type A DTCs.
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Control Module References for scan tool information
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.
⇒ | If the circuit and fuel injector test normal, replace the ECM. |
• | 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. |
⇒ | If the resistance is more than 0.2-0.3 ohms resistance, replace the fuel injector. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for ECM replacement, setup, and programming |