Page 263 - Foton Workshop Manual - Tunland (AT)
P. 263
DIAGNOSTICS - ENGINE CONTROL SYSTEM 04-117
Failure code Diagnostic items (DTC definition) Trouble location
• The signal circuit is open or shorted
to the power supply
• ECM
• Intake manifold pressure tempera-
04
ture sensor
Intake Manifold 1 temperature sen- • Signal circuit in wire harness is
P154 sor-Voltage is below normal or short circuit to the ground
shorted to high voltage power supply • Signal circuit in sensor is shorted
to the loop circuit or to the ground
• ECM
• Intake manifold pressure tempera-
ture sensor
Intake Manifold 1 temperature - data • Intake manifold pressure tempera-
P155 is valid but above normal operating ture sensor is in poor contact and
range - highest severity level the sensor harness is open or
shorted
• ECM
• Electronic throttle control actuator
Electronic throttle control actuator
• Electronic throttle control actuator
drive circuit - voltage is above normal
P175 is in poor contact and the sensor
or shorted to high voltage power
harness is open or shorted
supply
• ECM
• Electronic throttle control actuator
Electronic accelerator control actua-
• Electronic throttle control actuator
tor drive circuit - voltage is below
P176 is in poor contact and the sensor
normal or shorted to low voltage
harness is open or shorted
power supply
• ECM
• Electronic throttle control actuator
Electronic throttle control actuators - • Electronic throttle control actuator
P177 mechanical systems are not respon- is in poor contact and the sensor
sive or misaligned harness is open or shorted
• ECM
• Fan
Fan control circuit - voltage is below • Fan connector is in poor contact
P245 normal or shorted to high voltage and the sensor harness is open or
power supply shorted
• ECM
• Fuel pump actuator
Engine fuel pump booster assembly
• Fuel pump actuator connector is
P271 1 circuit - voltage is below normal or out of contact, the harness is open
shorted to high voltage power supply
or shorted
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