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• | 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. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Fuel Injector Positive Voltage Control Group 1 | P2147 00 | P0201 00, P0204 00 | P2148 00 | - |
Fuel Injector Positive Voltage Control Group 2 | P2150 00 | P0202 00, P0203 00 | P2151 00 | - |
Fuel Injector 1 Control | - | P0201 00 | - | - |
Fuel Injector 2 Control | - | P0202 00 | - | - |
Fuel Injector 3 Control | - | P0203 00 | - | - |
Fuel Injector 4 Control | - | P0204 00 | - | - |
The engine control module (ECM) supplies voltage to each fuel injector on the injector positive voltage control circuits. The ECM energises 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 two groups:
• | Group 1 - Injectors 1 and 4 |
• | Group 2 - Injectors 2 and 3 |
When a fuel injector circuit condition is detected by the ECM, the affected fuel injector will be disabled and may disable the affected group of fuel injectors.
• | The engine is running. |
• | The ECM monitors for a condition once per camshaft revolution. |
The ECM detects that the commanded state of the driver and the actual state of the control circuit do not match.
DTCs P2147 00, P2148 00, P2150 00 and P2151 00 are Type A DTCs.
DTCs P2147 00, P2148 00, P2150 00 and P2151 00 are Type A DTCs.
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Control Module References for scan tool information
⇒ | If any DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle . |
⇒ | If less than the specified range, test the control circuit for an open/high resistance or for a short to ground. If the circuit tests normal, replace the K20 Engine Control Module. |
⇒ | If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module. |
• | Terminal 26 for injector 1 |
• | Terminal 74 for injector 2 |
• | Terminal 75 for injector 3 |
• | Terminal 25 for injector 4 |
⇒ | If greater than the specified range, test the low control circuit for an open/high resistance |
Note: The DMM and test leads must be calibrated to 0 Ω in order to prevent misdiagnosis.
⇒ | If not within the specified range, replace the appropriate Q17 Fuel Injector. |
⇒ | If not the specified value, replace the appropriate Q17 Fuel Injector. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for ECM replacement, programming and setup |
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