Component Inspection
1.CHECK MIRROR SWITCH & CHANGEOVER SWITCH
1. Turn ignition switch OFF.
2. Disconnect door mirror remote control switch connector.
3. Check door mirror remote control switch.

Is the inspection result normal?
YES >> Inspection end.
NO >> Replace door mirror remote control switch. Refer to MIR "Removal and Installation".
SYMPTOM DIAGNOSIS
U0140 Lost communication (BCM)
DTC Logic
DTC DETECTION LOGIC
DTC
Trouble diagnosis name
DTC detection condition
Possible causes
U0140
Lost Communication With Body
Control Module
When the ignition switch is ON,
TCM is unable to receive the
CAN communications signal
from BCM continuously ...
Rear window defogger and door
mirror defogger do not operate
Diagnosis Procedure
1. CHECK REAR WINDOW DEFOGGER SWITCH
Check rear window defogger switch.
Refer to DEF "Component Function Check".
Is the inspection result normal?
YES >> GO TO 2
NO >> Repair or replace the malfunctioning parts.
2. CHECK REAR WINDOW DEFOGGER RELAY
...