Page 380 - Foton Workshop Manual - Tunland (AT)

04-234 DIAGNOSTICS - ENGINE CONTROL SYSTEM

DTC inspection
DTC DTC definition Trouble location
conditions
Accelerator pedal or
lever position sensor • Accelerator pedal
2 circuit - Voltage is position sensor
P1239
04 above normal or • Accelerator pedal
shorted to high • When the key or lever position
switch is in ON
voltage power supply. sensor connector is
position, the
Accelerator pedal or diagnosis continues in poor contact and
lever position sensor to run the sensor harness
2 circuit - Voltage is is broken or shorted
P1241 .
below normal or
shorted to low voltage • ECM
power supply.

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 accelerator pedal or lever position sensor
2?

Is the inspection result normal?
YES>To step 2.
NO>Intermittent trouble exists.

2 . Check accelerator pedal or lever position sensor 2 power supply circuit
(a) Ignition switch: OFF.
(b) Disconnect the battery negative cable.
(c) Disconnect the connector A026 of accelerator pedal or lever position sensor 2.
(d) Connect the battery negative cable.
(e) Ignition switch: ON.

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