Toyota Corolla Repair Manual: Inspection procedure
1 Check front airbag sensor (lh) circuit (to b+)(airbag sensor assy center – airbag sensor front 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 airbag sensor front 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 front lh and the airbag sensor
assy center, measure the voltage between body ground
and each of +sl and –sl.
Ok: voltage: below 1 v
2 Check front airbag sensor(lh) circuit(to ground)(airbag sensor assy center – airbag sensor front lh)
- Turn the ignition switch to lock.
- disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.
- for the connector (on the airbag sensor assy center side)
between the airbag sensor front lh and the airbag sensor
assy center, measure the resistance between body
ground and each of +sl and –sl.
Ok: resistance: 1 mΩ or higher
3 Check front airbag sensor (lh) circuit(open)(airbag sensor assy center – airbag sensor front lh)
- Using a service wire, connect +sl and –sl of the connector (on the airbag sensor front lh side) between the airbag sensor assy center and the airbag sensor front lh.
- for the connector (on the airbag sensor assy center side)
between the airbag sensor front lh and the airbag sensor
assy center, measure the resistance between +sl and
–sl.
Ok: resistance: below 1 Ω
4 Inspect air bag sensor front lh
- For the connector of the airbag sensor front lh, measure
the resistance between +sl and –sl.
Ok: resistance: 820 Ω
5 Check air bag sensor assy center
Sst 09843–18040
- Disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.
- connect the airbag sensor front lh connector and airbag sensor assy center 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 b1158/b1159/16 is not output.
Hint
: codes other than code b1158/b1159/16 may be output at this time, but they are not relevant to this check.
Use simulation method to check
6 Check engine room main wire harness (to b+)(conector – airbag sensor front lh)
- Turn the ignition switch to lock.
- disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.
- disconnect the connector between the engine room main wire and the instrument panel wire.
- connect the negative (–) terminal to the battery, and wait at least for 2 seconds.
- turn the ignition switch to on.
- for the engine room main wire connector (on the airbag
sensor assy center side) between the airbag sensor assy
center and the airbag sensor front lh, measure the voltage
between body ground and each of +sl and –sl.
Ok: voltage: below 1 v
Repair or replace instrument panel wire
7 Check engine room main wire harness (to ground)(connector – airbag sensor front lh)
- Disconnect the connectors between the engine room main wire and the instrument panel wire.
- for the engine room main wire connector (on the airbag
sensor assy center side) between the airbag sensor assy
center and the airbag sensor front lh, measure the resistance
between body ground and each of +sl and –sl.
Ok: resistance: 1 mw or higher
Repair or replace instrument panel wire
8 Check engine room main wire harness(open)(connector – airbag sensor front lh)
- Disconnect the connectors between the engine room main wire and the instrument panel wire.
- using a service wire, connect +sl and –sl of the engine room main wire connector (on the airbag sensor front lh side) between the airbag sensor assy center and the airbag sensor front lh.
- for the engine room main wire connector (on the airbag
sensor assy center side) between the airbag sensor assy
center and the airbag sensor front lh, measure the resistance
between +sl and –sl.
Ok: resistance: below 1 Ω
Repair or replace instrument panel wire
Circuit description
The airbag sensor front lh circuit consists of the airbag sensor assy center
and airbag sensor front lh.
Dtc b1158/b1159/16 is recorded when malfunction is detected in the airbag sensor
front l ...
Short in d squib (2nd step) circuit
Dtc b1180/17 short in d squib (2nd step) circuit ...
Other materials:
Description
When troubleshooting obd ii vehicles, the only difference
from the usual troubleshooting procedure is that you
need to connect the vehicle to the obd ii scan tool complying
with sae j1978 or the hand–held tester, and read
various data output from the vehicle’s ecm.
Obd ii regulations re ...
Driving assist systems
To help enhance driving safety and performance, the following systems operate
automatically in response to various driving situations. Be aware, however, that
these systems are supplementary and should not be relied upon too heavily when operating
the vehicle.
◆ ABS (Anti-lock Brake Sys ...
Check short circuit
If the wire harness is ground shorted as shown in fig. 5,
Locate the section by conducting a resistance check with
the body ground in step (b).
Check the resistance with the body ground.
Disconnect connectors a and c and measure the
resistance between terminals 1 and 2 ...