Troubleshooting
4.3-6
DTC of VCU (independently-developed motor)
Recommended
countermeasures
Ignition key position signal
abnormal
Key switch sensor abnormal
High accelerator pedal angle
signal voltage
High accelerator pedal angle
signal voltage
Replace the accelerator pedal
assembly.
Low accelerator pedal angle
signal voltage
Low accelerator pedal angle
signal voltage
Accelerator pedal assembly
Inspect the power system.
Sensor short to ground; sensor
short to the power supply;
sensor open; sensor signal not
in the effective range.
Replace the vacuum sensor.
Vacuum pump failed or
vacuum system leaking
Vacuum system leaking or
vacuum pump working timeout
Voltage is within normal range
or re-power on
Master cylinder pressure
sensor or circuit fault
Replace the master cylinder
pressure sensor and inspect
the related wire harness.
Master cylinder pressure
sensor signal abnormal
Replace the master cylinder
pressure sensor.
Brake lamp switch sensor or
circuit failed
Replace the brake lamp switch
sensor and inspect the related
wire harness.
P gear control unit position
sensor failed
P gear control unit reporting
failure
Inspect if the P gear
engagement/disengagement
can be self-recovered,
otherwise the P gear control
unit assembly needs to be
replaced.
P gear control unit actuator
motor failed
Check if the p-gear
engagement/disengagement
can be recovered
automatically; otherwise,
replace the PCU assembly
P gear control unit locking
failure
Check if the p-gear
engagement/disengagement
can be recovered
automatically; otherwise,
replace the PCU assembly
P gear control unit unlocking
failure
Check if the p-gear
engagement/disengagement
can be recovered
automatically; otherwise,
replace the PCU assembly
P gear control unit unknown
status failure
Check if the p-gear
engagement/disengagement
can be recovered
automatically; otherwise,
replace the PCU assembly
Battery failure or loss of
electricity
BMS failed or wire harness
fault
Inspect the wire harness and
the BMS.
MCU failed or wire harness
fault
Inspect the wire harness and
the MCU.
Instrument communication loss
Instrument failed or wire
harness fault
Inspect the wire harness and
the instrument.
A/C control unit failed or wire
harness fault
Inspect the wire harness and
A/C control unit.
ABS failed or wire harness fault
Inspect the wire harness and
the ABS.
BCM failed or wire harness
fault
Inspect the wire harness and
the BCM.
EPS failed or wire harness fault
Inspect the wire harness and
the EPS.