Table 4-11
Symptom Cause Symptom Cause
Door lock control
system does not
work
1 Faulty power supply fuse
2 Faulty body control module
3 Faulty wiring
Door lock locking/unlocking
fault (apply central control
switch and key)
1 Faulty air conditioning
controller
2 Faulty body control module
3 Faulty wiring
4 Faulty door key
locking/unlocking switch
Only one door lock
does not work
1 Faulty door lock motor
2 Faulty wiring
All four door locks do not
work
1 Faulty body control module
2 Faulty switch control device
3 Faulty door lock motor
4 Faulty wiring
Remote control fails
1 Faulty door lamp switch
2 Faulty key locking and
unlocking switch of door
3 Faulty body control module
(receiving)
4 Weak battery or faulty remote
controller (sending)
5 Faulty wiring
Locking by mistake (key at
ignition switch, automatic
locking available at stop)
1 Faulty fastener
2 Faulty body control module
3 Faulty wiring
VI. Component check
1. Basic check
(1) When locking the door at driver’s side using key, all doors should be locked; when unlocking
the door at driver’s side using key, all doors should be unlocked.
(2) Security check
If the burglar alarm system is still not activated, ① and the unlocking key on the remote controller
is pressed, then only unlocking will be implemented.
If the burglar alarm system is activated, upon unlocking by remote control, then the steering ②
signal lamp flashes for twice and annunciator sounds for twice, burglar alarm indicator goes out.
③ If the burglar alarm system is activated, and no door is opened after unlocking by remote
control, then alert state will recover together with automatic locking, the steering light does not
flash and annunciator does not sound.
2. Check of left front door central lock actuator as shown in Fig. 4-51
Left front door central lock actuator
Fig. 4-51
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