SB
SB
SB
SB Seat
Seat
Seat
Seat Belt
Belt
Belt
Belt
- 131 -
Diagnosis
Diagnosis
Diagnosis
Diagnosis and
and
and
and Testing
Testing
Testing
Testing
T
T
T
T
roubleshooting
roubleshooting
roubleshooting
roubleshooting
Fault of driver
’
s seat belt indicator lamp circuit
Step Operation
Yes
No
1
① Turn the ignition switch on and the engine switch is off.
Important precautions : When the driver
’
s seat belt is not fastened, the seat belt
indicator lamp should illuminate .
② Fasten, unfasten the driver
’
s seat belt and check the seat belt indicator lamp in
instrument panel combination instrument.
When unfasten and fasten the driver
’
s seat belt, do the corresponding seat belt
indicator lamps illuminate and extinguish?
— Go to Step 2
3
Replace the instrument panel combination instrument.
Has the replacement operation been completed?
Go to Step 6 —
3
① Turn the ignition switch off.
② Disconnect the connector of left seat belt switch.
③ Test if the signal circuit of left seat belt switch is open or high-impedance.
Has the condition been found and corrected?
Go to Step 6 Go to Step 4
4
Test if ground circuit of left seat belt switch is open or high-impedance.
Has the problem been found and resolved?
Go to Step 6 Go to Step 5
5
Replace the left seat belt switch.
Has the replacement operation been completed?
Go to Step 6 —
6
Operate the system to check the maintenance effect.
Has the problem been found and resolved?
The system is
normal
Go to Step 2
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