Toyota Corolla Repair Manual: Inspection procedure
1 Check wire harness(airbag sensor assy center – front seat inner belt assy lh)
- Disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.
- disconnect the connectors between the airbag sensor assy center and the front seat inner belt assy (lh).
- for the connector (on the airbag sensor assy center side)
between the airbag sensor assy center and the front seat
inner belt assy (lh), measure the resistance between
lbe+ and body ground.
Ok: resistance: 1 mw or higher
2 Check wire harness(airbag sensor assy center – front seat inner belt assy lh)
- Connect the negative (–) terminal cable to the battery, and wait at least for 2 seconds.
- turn the ignition switch to on.
- for the connector (on the airbag sensor assy center side)
between the airbag sensor assy center and the front seat
inner belt assy (lh), measure the voltage between lbe+
and body ground.
Ok: voltage: below 1 v
3 Check front seat inner belt assy lh
- Turn the ignition switch to lock.
- disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.
- connect the connector of the front seat inner belt assy (lh).
- unlock the seat belt for the front driver’s seat.
- for the connector (on the airbag sensor assy center side),
measure the resistance between lbe+ and body ground.
Ok: resistance: 1.0 Kw – 1.6 KΩ
4 Check front seat inner belt assy lh
- Lock the seat belt for the front driver’s seat.
- for the connector (on the airbag sensor assy center side),
measure the resistance between lbe+ and body ground.
Ok: resistance: 100 w – 500 Ω
5 Check air bag sensor assy center
Sst 09843–18040
- Connect the connector to the airbag sensor assy center.
- connect the negative (–) terminal cable to the battery, and wait at least for 2 seconds.
- turn the ignition switch to on, and wait at least for 20 seconds.
- clear the dtc stored in memory .
- turn the ignition switch to lock, and wait at least for 20 seconds.
- turn the ignition switch to on, and wait at least for 20 seconds.
- check the dtc .
Ok: dtc b0126/b0127/27 is not output.
Hint
: codes other than code b0126/b0127/27 may be output at this time, but they are not relevant to this check.
Use simulation method to check
Circuit description
The seat belt buckle switch (lh) circuit consists of the airbag sensor assy
center and front seat inner belt
assy (lh).
Dtc b0126/b0127/27 is recorded when a malfunction is detected in the seat ...
Short in p/t squib (rh) circuit
Dtc b0130/63 short in p/t squib (rh) circuit ...
Other materials:
Using the AUX port
To use the AUX port, connect a portable player, press the “AUDIO” button,
then select “AUX” to display the audio control screen.
Connecting a portable audio player
■Operating portable audio players connected to the multimedia system
The volume can be adjusted using the vehicle's audio ...
Source voltage drop
The srs is equipped with a voltage–increase circuit (dc–dc converter) in the
airbag sensor assy center
in case the source voltage drops.
When the battery voltage drops, the voltage–increase circuit (dc–dc converter)
functions to increase the
voltage of the srs to normal voltage.
The diag ...
How to proceed with troubleshooting
1 Vehicle brought to workshop
2 Customer problem analysis
3 Problem symptom confirmation
4 Circuit inspection
5 Repair or replace
6 Confirmation test
7 End
Customer problem analysis check
...