Page 319 - Foton Workshop Manual - Tunland (AT)

DIAGNOSTICS - ENGINE CONTROL SYSTEM 04-173

DTC inspection
DTC DTC definition Trouble location
conditions
Engine crankshaft
speed / position - • When the engine is
data is valid but running, the
P234
above normal diagnostics 04
operating range continues to run.
-highest severity level
Sensor power 3
circuit - voltage is
P238 below normal or • After the key switch
shorted to low voltage is switched on or
power supply when the engine is
running, the
Sensor power 3
diagnosis continues
circuit - voltage is
P239 above normal or to run • Crankshaft position
sensor
shorted to high
• Crankshaft position
voltage power supply
sensor connector is
Engine crankshaft in poor contact and
speed / position - the sensor harness
P689 data is unstable, is open or shorted
intermittent or • ECM
incorrect

Engine speed /
position camshaft and
• When the engine is
crankshaft alignment
running, the
P731 errors - mechanical
diagnostics
systems are not
continues to run.
responding or
misaligned
Engine crankshaft
speed / position -
P2322 data is unstable,
intermittent or
incorrect

Diagnosis Procedure

Page 319