CHECK POWER SUPPLY OF DPF PRESSURE DIFFERENCE SENSOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from the DPF pressure difference sensor.

3) Turn the ignition switch to ON.

4) Measure the voltage between DPF pressure difference sensor connector and engine ground.

Connector & terminal

(B472) No. 1 (+) — Engine ground (−):

QUESTION

Is the voltage 4.5 V or more?

Yes No

Repair the harness and connector.

NOTE:

In this case, repair the following item:

• Open circuit or short circuit to ground in harness between ECM connector and DPF pressure difference sensor connector

• Poor contact of ECM connector

• Poor contact of coupling connector