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: Injector 1 Control CircuitDTC 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
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Fuel Injector 1-3-5 Ignition Voltage | P0201¹, P0203¹, P0205¹, P0300¹ | P0201, P0203, P0205 | -- | -- |
Fuel Injector 2-4-6 Ignition Voltage | P0202¹, P0204¹, P0206¹, P0300¹ | P0202, P0204, P0206, P0300 | -- | -- |
Fuel Injector 1 Control | P0201, P0300 | P0201, P0300 | P0201, P0300 | -- |
Fuel Injector 2 Control | P0202, P0300 | P0202, P0300 | P0202, P0300 | -- |
Fuel Injector 3 Control | P0203, P0300 | P0203, P0300 | P0203, P0300 | -- |
Fuel Injector 4 Control | P0204, P0300 | P0204, P0300 | P0204, P0300 | -- |
Fuel Injector 5 Control | P0205, P0300 | P0205, P0300 | P0205, P0300 | -- |
Fuel Injector 6 Control | P0206, P0300 | P0206, P0300 | P0206, P0300 | -- |
¹Open fuse | ||||
Circuit/System Description
The control module enables the appropriate fuel injector pulse for each cylinder. Ignition voltage is supplied to each bank of fuel injectors through a separate fuse. 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
| • | The engine is running. |
| • | The ignition voltage is more than 11 volts for 5 seconds. |
| • | DTC P0201-P0206 runs continuously when the above conditions are met. |
Conditions for Setting the DTC
| • | The control module detects an incorrect voltage on the fuel injector control circuit. |
| • | The above condition is met for 1 second. |
Action Taken When the DTC Sets
DTCs P0201-P0206 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0201-P0206 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
Connector End View Reference
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Circuit/System Verification
Key ON, observe the DTC information with a scan tool. DTC P0201, P0202, P0203, P0204, P0205, or P0206 should not be set.
Circuit/System Testing
- Ignition OFF, disconnect the C101 fuel injector multi-way connector.
- Ignition ON, verify that a test lamp illuminates between the ignition circuit terminals A and E engine control module (ECM) harness side and ground.
- Ignition OFF, connect a test lamp between the ignition circuit terminal A and the control circuit ECM harness side, of the appropriate injector listed below:
- Engine cranking, the test lamp should flash for each injector.
- Ignition OFF, measure for 10-15 ohms on the engine harness side of C101 between the ignition circuit terminal A or E and the control circuit of the appropriate injector listed below:
| ⇒ | If the test lamp does not illuminate, test the ignition circuits for a short to ground, or an open/high resistance. If the circuits test normal and the ignition circuit fuse is open, test or replace the fuel injector. |
| • | Injector 1 terminal B |
| • | Injector 2 terminal F |
| • | Injector 3 terminal C |
| • | Injector 4 terminal G |
| • | Injector 5 terminal D |
| • | Injector 6 terminal H |
| ⇒ | If the test lamp is always ON, test the appropriate control circuit for a short to ground. If the circuit tests normal, replace the ECM. |
| ⇒ | If the test lamp is always OFF, test the appropriate control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM. |
| • | Injector 1 terminal B |
| • | Injector 2 terminal F |
| • | Injector 3 terminal C |
| • | Injector 4 terminal G |
| • | Injector 5 terminal D |
| • | Injector 6 terminal H |
| ⇒ | If the resistance is not within the specified range, test for a short to ground or an open/high resistance between C101 and the appropriate fuel injector harness connector. If the circuits test normal, test or replace the affected fuel injector. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for ECM replacement, setup, and programming |
