P0405

CIRCUIT DESCRIPTION

Schematic:

The PCM controls the movement of the valve using the EGR control circuit. To monitor the response of the EGR valve, the PCM uses a pintle position sensor. The PCM supplies the EGR pintle position sensor with a reference voltage and a ground. The sensor provides the PCM with a signal voltage relative to EGR valve opening. When the EGR valve is near fully open, the signal voltage is close to the reference voltage. The signal voltage is low when the PCM commands the EGR closed. The PCM checks the signal voltage to make sure that the sensor operates within the proper range. If the PCM detects an excessively low signal voltage, DTC P0405 will set.

CONDITIONS FOR RUNNING THE DTC
The ignition voltage is more than 11 volts.

CONDITIONS FOR SETTING THE DTC
The PCM detects an EGR valve pintle position sensor voltage less than 0.1 volt for at least 2 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ The PCM illuminates the Malfunction Indicator Lamp (MIL) during the second consecutive trip in which the diagnostic test runs and fails.
^ The PCM stores the conditions present when the DTC set as Freeze Frame and Fail Records data.

CONDITIONS FOR CLEARING THE MIL/DTC
^ The PCM will turn the MIL OFF after the third consecutive trip in which the diagnostic runs and passes.
^ The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
^ The DTC can be cleared by using the scan tool Clear DTC Information function.

DIAGNOSTIC AIDS

NOTE: Refer to Connector Test Adapter Kit J 35616-A Notice in Service Precautions.

If the condition is intermittent, refer to Intermittent Conditions in Symptoms. Intermittent Conditions

TEST DESCRIPTION

Steps 1 - 7:

Steps 8 - 12: