Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Supplemental restraint system / Source voltage drop / Inspection procedure

Toyota Corolla (E120): Inspection procedure

1 Prepare for inspection

1. Disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.
2.  remove the horn button assy .
3.  disconnect the connector of the instrument panel passenger airbag assy .
4.  disconnect the connector of the front seat airbag assy rh and lh .
5.  disconnect the connector of the seat belt pretensioner rh and lh .
6.  disconnect the connectors of the airbag sensor assy center .
7.  disconnect the connector of the airbag front rh sensor and airbag sensor front lh ( and 60–42).
8.  disconnect the connector of the side airbag sensor assy rh and lh
9.  disconnect the connector of the seat position airbag sensor .

Caution

: store the horn button assy, instrument panel passenger airbag assy and front seat airbag assy with the front surface facing upward.

2 Check source voltage

1. Connect the negative (–) terminal cable to the battery, and wait at least for 2 seconds.
2.  turn the ignition switch to on, and wait at least for 60 seconds.
3.  measure the voltage between e1 (e2) and terminal ig2 on the sensor and operate electric system (defogger, wiper, headlight, heater blower, etc.).

   Ok: voltage: 10 – 14 v

3 Check srs warning light turn off

1. Turn the ignition switch to lock.
2.  disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.
3.  connect the horn button assy connectors.
4.  connect the instrument panel passenger airbag assy connector.
5.  connect the front seat airbag assy rh and lh connectors.
6.  connect the seat belt pretensioner rh and lh connectors.
7.  connect the airbag sensor assy center connectors
8.  connect the front airbag sensor rh and lh connectors.
9.  connect the side airbag sensor assy rh and lh connectors.
10.  connect the seat position airbag sensor connector.
11.  connect the negative (–) terminal cable to the battery.
12.  turn the ignition switch to on, and wait at least for 60 seconds.
13.  operate electric system (defogger, wiper headlight, heater blower, etc.) And check that srs warning light goes off.

    Ok: srs warning light is not light up.

4 Check air bag sensor assy center

Sst 09843–18040

1. Turn the ignition switch to lock.
2.  disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.
3.  connect the negative (–) terminal cable to the battery, and wait at least for 2 seconds.
4.  turn the ignition switch to on, and wait at least for 20 seconds.
5.  clear the dtc stored in memory .
6.  turn the ignition switch to lock, and wait at least for 20 seconds.
7.  turn the ignition switch to on, and wait at least for 20 seconds.
8.  check the dtc .

   Ok: dtc is not output.

Use simulation method to check