P0204
DTC P0204CIRCUIT 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. If the control module detects an incorrect voltage for the commanded state of the driver, a diagnostic trouble code (DTC) will set.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTCs:
- DTC P0201 Injector 1 Control Circuit
- DTC P0202 Injector 2 Control Circuit
- DTC P0203 Injector 3 Control Circuit
- DTC P0204 Injector 4 Control Circuit
CONDITIONS FOR RUNNING THE DTC
- The engine speed is more than 700 RPM.
- The ignition 1 voltage is more than 9 Volts.
- This DTC runs continuously once 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 5 seconds.
ACTION TAKEN WHEN THE DTC SETS
- The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
- The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/Failure Records.
CONDITIONS FOR CLEARING THE MIL/DTC
- The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Clear the MIL and the DTC with a scan tool.
DIAGNOSTIC AIDS
- Performing the Fuel Injector Coil Test may help isolate an intermittent condition. Refer to Fuel Injector Coil Test. Component Tests and General Diagnostics
- For an intermittent condition, refer to Intermittent Conditions. Intermittent Conditions
TEST
Step 1:
Steps 2-6:
Steps 7-13:
