Page 278 - Foton Workshop Manual - Tunland (AT)
P. 278
04-132 DIAGNOSTICS - ENGINE CONTROL SYSTEM
Failure code Diagnostic items (DTC definition) Trouble location
• Postprocessing DPF temperature
sensor and its harness
• CAN bus and its harness
• ECM
04
• Postprocessing DPF temperature
Postprocessing diesel particulate fil- sensor module
P4158 ter temperature sensor module - In- • Postprocessing DPF temperature
telligent device or component fault sensor and its harness
• ECM
• Atmospheric pressure sensor
• The signal circuit in the engine
Atmospheric pressure sensor circuit harness or sensor is open or
P222 - Voltage is below normal or shorted shorted to ground
to high voltage power supply • Power line is open or shorted to
ground
• ECM
• Crankshaft position sensor
Engine crankshaft speed / position - • Crankshaft position sensor connec-
P234 data is valid but above normal oper- tor is in poor contact and the sen-
ating range - highest severity level sor harness is open or shorted
• ECM
• Crankshaft position sensor
Sensor power 3 circuit - voltage is • Crankshaft position sensor connec-
P238 below normal or shorted to low volt- tor is in poor contact and the sen-
age power supply sor harness is open or shorted
• ECM
• Crankshaft position sensor
Sensor power 3 circuit - voltage is • Crankshaft position sensor connec-
P239 above normal or shorted to low volt- tor is in poor contact and the sen-
age power supply sor harness is open or shorted
• ECM
• Atmospheric pressure sensor
• Open circuit in harness, connector
Atmospheric pressure sensor circuit
or sensor circuit
P221 - voltage is above normal or shorted
• The signal circuit is short to the
to high voltage power supply
sensor power or battery voltage
• ECM
• Engine coolant temperature sensor
Engine coolant temperature 1 sensor • Signal in wire harness is short cir-
P145 circuit-Voltage below normal or cuit to the ground
shorted to high voltage power supply • Signal in sensor is shorted to the
loop circuit or to the ground
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