Toyota Corolla Repair Manual: Inspection procedure
1 Check p/t squib(lh) circuit(airbag sensor assy center – front seat outer 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 seat belt pretensioner (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 seat belt pretensioner side) between
the airbag sensor assy center and the seat belt pretensioner
(lh), measure the voltage between pl+ and
body ground.
Ok: voltage: below 1v
2 Check air bag sensor assy center
Sst 09843–18040
- Turn the ignition switch to lock.
- disconnect the negative (–) terminal cable from the battery and wait at least for 90 seconds.
- connect the connector to the airbag sensor assy center.
- using a service wire, connect pl+ and pl– of the connector (on the seat belt pretensioner side) between the airbag sensor assy center and the seat belt pretensioner (lh).
- 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 b0138/72 is not output.
Hint
: codes other than code b0138/72 may be output at this time, but they are not relevant to this check.
3 Check p/t squib (lh)
Sst 09843–18040
- Turn the ignition switch to lock.
- disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.
- connect the seat belt pretensioner (lh) connector.
- 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 b0138/72 is not output.
Hint
: codes other than code b0138/72 may be output at this time, but they are not relevant to this check.
4 Use simulation method to check
Replace all srs components including the wire harness
Circuit descriptionCircuit description
The p/t squib (lh) circuit consists of the airbag sensor assy center and seat
belt pretensioner (lh).
It causes the srs to deploy when the srs deployment conditions are satisfied.
Dtc b0138/72 ...
Airbag sensor assy malfunction
Dtc b1100/31 airbag sensor assy malfunction ...
Other materials:
Overhaul
Hint: components:
1. Drain manual transaxle oil (m/t transaxle)
torque: 39.2 Nvm (400 Kgf·cm, 29 ft·lbf)
2. Drain automatic transaxle fluid (a/t transaxle)
torque: 17.5 Nvm (178 Kgf·cm, 13 ft·lbf)
3. Remove front wheel
4. Remove engine under cover lh
5. Remove front axle hub lh nut
U ...
Inspection procedure
1 Inspect fuse(ecu–ig fuse)
Remove ecu–ig fuse from the instrument panel j/b.
check continuity of ecu–ig fuse.
Ok:
continuity
2 Inspect battery
Ok:
voltage: 10 – 14 v
3 Inspect skid control ecu connector(ig1 terminal voltage)
In case of using hand–held tester:
...
Malfunction in speedometer
Wiring diagram
Inspection procedure
1 Check combination meter assy
Remove the combination meter assy with connector still
connected.
check voltage.
Jack up either of the front wheels.
Shift the shift lever to neutral.
Turn the ignition switch to on ...