DTC P009B Common Rail Pressure Relief Valve Drive Circuit (4JJ3 with DPD)

1. DTC P009B description

The ECM monitors the pressure difference between the actual fuel rail pressure and the desired fuel rail pressure. If the pressure difference exceeds the predetermined value, the ECM opens the FRP reduction valve to adjust the fuel rail pressure. If the ECM detects a malfunction in the FRP reduction valve circuit, the DTC is set.

2. Condition for setting DTC P009B

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 a malfunction in the FRP reduction valve circuit.

3. Action taken when DTC P009B 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 pre-injection.
  • The ECM inhibits the cruise control.

4. Condition for clearing DTC P009B

  • 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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