Page 374 - Foton Workshop Manual - Tunland (AT)

04-228 DIAGNOSTICS - ENGINE CONTROL SYSTEM

DTC inspection
DTC DTC definition Trouble location
conditions
Engine camshaft
• Camshaft position
speed / position
sensor
P778 sensor - data is
• The camshaft
04 unstable, intermittent • When the engine is
or incorrect running, the position sensor
diagnosis continues connector is in poor
Engine camshaft contact and the
speed / position to run. sensor harness is
P2322 sensor - data is broken or shorted
unstable, intermittent • ECM
or incorrect

Diagnosis Procedure

NOTICE

• To implement the following steps, ensure that ECM is grounded properly.
• Before conducting electric diagnosis, do refer to the reference circuit diagram
and the element information.
• Before conducting measurement, check the pins of connectors for rupture,
looseness and rust, and ensure that the pins are contacted properly.
• If the connection is good, check the sensor signal voltage when moving the
connector and harness. If a fault occurs, the voltage display on the diagnostic
instrument will change.

1 . DTC inspection
(a) Ignition switch: OFF.
(b) Connect the diagnostic apparatus.
(c) Use the diagnostic apparatus, read the fault code.
(d) Confirm whether there is fault code related to camshaft position sensor?
Is the inspection result normal?
YES>To step 2.

NO>Intermittent trouble exists.

2 . Check power supply circuit for camshaft position sensor
(a) Ignition switch: OFF.
(b) Disconnect the battery negative cable.
(c) Disconnect connector E03 of camshaft position sensor.
(d) Connect the battery negative cable.
(e) Ignition switch: ON.

Page 374