Page 271 - Foton Workshop Manual - Tunland (AT)
P. 271
DIAGNOSTICS - ENGINE CONTROL SYSTEM 04-125
Failure code Diagnostic items (DTC definition) Trouble location
Electronic fuel injection control valve • Fuel pump actuator and its harness
P2311
circuit - fault exist • ECM
Engine crankshaft speed / position - • Crankshaft position sensor and its
P2321 Data is unstable, intermittent or incor- harness
04
rect • ECM
Engine camshaft speed / position • Camshaft position sensor and its
P2322 sensor - Data is unstable, intermittent harness
or incorrect • ECM
EGR valve control circuit - voltage is
• EGR valve and its harness
P2351 below normal or shorted to low volt-
• ECM
age power supply
EGR valve control circuit - voltage is
• EGR valve and its harness
P2352 above normal or shorted to high • ECM
voltage power supply
EGR valve control circuits - mechan-
• EGR valve and its harness
P2357 ical systems are not responsive or
• ECM
misaligned
• Exhaust pressure sensor
• Open circuit in engine harness,
Exhaust pressure sensor circuit -
joint or sensor loop circuit
P2373 voltage is above normal or shorted
• The signal wire is short to the sen-
to high voltage power supply
sor power or battery voltage
• ECM
• Exhaust pressure sensor
• Engine harness or sensor signal
Exhaust pressure sensor circuit -
circuit is open or shorted to ground
P2374 voltage is below normal or shorted
• Power line is open or shorted to
to high voltage power supply
ground
• ECM
• Fan
• The engine harness or fan controls
Fan control circuit - voltage is above solenoid valve is open circuit
P2377 normal or shorted to high voltage
• OEM harness is shorted to power
power supply
supply
• ECM
• Variable geometry turbocharger
VGT actuator drive circuit (motor) -
actuator and its harness
P2387 mechanical system does not respond • Postprocessing system
or misalignment
• ECM
Page 271
