Page 425 - Foton Workshop Manual - Tunland (AT)

DIAGNOSTICS - ENGINE CONTROL SYSTEM 04-279

Is the inspection result normal?

YES>To step 2.
NO>Intermittent trouble exists.

2 . Check postprocessing diesel particulate filter differential pressure sensor circuit

(a) Ignition switch: OFF. 04
(b) Disconnect the battery negative cable.
(c) Disconnect DPF differential pressure sensor Q02.
(d) Connect the battery negative cable.
(e) Ignition switch: ON.

(f) Use a multimeter to measure the voltage
between the pin 5 of DPF pressure sensor
connector Q02 and the ground.
Standard voltage

Multimeter connection
Standard value
pin

Q02（3）-ground 4.75～5.25 V

Is the inspection result normal?
YES>To step 4.
No > Maintain or replace the harness.

3 . Check DPF pressure sensor harness
(a) Ignition switch: OFF.
(b) Disconnect the battery negative cable.
(c) Disconnect DPF differential pressure sensor Q02.
(d) Disconnect connector E01 of ECM.

Page 425