Page 284 - Foton Workshop Manual - Tunland (AT)

04-138 DIAGNOSTICS - ENGINE CONTROL SYSTEM

DTC inspection
DTC DTC definition Trouble location
conditions
• Wire harness
Engine magnetic connection of
• During engine
speed / position lost crankshaft position
operation, the
04 P115 two signals - Data diagnosis continues sensor and
unstable, intermittent, camshaft position
to run
or incorrect sensor is reversed.
• ECM

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 a fault code related to engine magnetic speed / position
signal?
Is the inspection result normal?

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

2 . Visual inspection of the crankshaft position sensor and camshaft position sensor

(a) Ignition switch: OFF.
(b) Check whether the crankshaft position sensor and camshaft position sensor connector
are insert upside.

Is the inspection result normal?
YES>To step 3.
NO> Insert correctly.

3 . Check power supply circuit for crankshaft position sensor
(a) Ignition switch: OFF.
(b) Disconnect the battery negative cable.
(c) Disconnect connector E02 of crankshaft position sensor.

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