DTC P0203 Injector Circuit - Cylinder 3 (4JJ3 with DPD)

1. DTC P0203 description

The ECM calculates the optimum fuel injection ON time based on the data sent from various sensors. The ECM supplies high voltage to the injector charge voltage circuit, grounds the injector solenoid control circuit, and drives the cylinder injectors. If the ECM detects an abnormal condition in the cylinder No. 3 injector circuit, the DTC is set.

2. Condition for setting DTC P0203

Condition for running the DTC

  • The battery voltage is 9 to 16 V.
  • The ignition switch is ON.
  • The engine is running.

Condition for setting the DTC

  • The ECM detects that there is an open circuit in the injector solenoid circuit for 3 seconds.

3. Action taken when DTC P0203 sets

  • The ECM illuminates the MIL. Refer to Action taken when DTC sets - Type A.

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC type definitions".

  • The ECM limits the fuel injection quantity.
  • The ECM inhibits the EGR control.
  • The ECM inhibits the cruise control.

4. Condition for clearing DTC P0203

  • Refer to Conditions for clearing the MIL/DTC - Type A or Type B.

Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) DTC type definitions".

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