Toyota Tacoma manuals

Toyota Corolla Repair Manual: Inspection procedure

1 Check front airbag sensor (rh) circuit (to b+)(airbag sensor assy center airbag front rh sensor)

  1. Disconnect the negative () terminal cable from the battery, and wait at least for 90 seconds.
  2.  disconnect the connectors between the airbag front rh sensor and the airbag sensor assy center.
  3.  connect the negative () terminal cable to the battery, and wait at least for 2 seconds.
  4.  turn the ignition switch to on.
  5.  for the connector (on the airbag sensor assy center side) between the airbag front rh sensor and the airbag sensor assy center, measure the voltage between body ground and each of +sr and sr.

    Ok: voltage: below 1 v

2 Check front airbag sensor (rh) circuit (to ground)(airbag sensor

2 Check front airbag sensor (rh) circuit (to ground)(airbag sensor assy airbag front rh sensor)

  1. Turn the ignition switch to lock.
  2.  disconnect the negative () terminal cable from the battery, and wait at least for 90 seconds.
  3.  for the connector (on the airbag sensor assy center side) between the airbag front rh sensor and the airbag sensor assy center, measure the resistance between body ground and each of +sr and sr.

    Ok: resistance: 1 mΩ or higher

3 Check front airbag sensor (rh) circuit(open)(airbag sensor assy

3 Check front airbag sensor (rh) circuit(open)(airbag sensor assy center airbag front rh sensor)

Sst 0984318040

  1. Using a service wire, connect +sr and sr of the connector (on the airbag front rh sensor side) between the airbag front rh sensor and the airbag sensor assy center.
  2.  for the connector (on the airbag sensor assy center side) between the airbag front rh sensor and the airbag sensor assy center, measure the resistance between +sr and sr.

    Ok: resistance: below 1 Ω

4 Inspect air bag front rh sensor

4 Inspect air bag front rh sensor

  1. For the connector of the airbag front rh sensor, measure the resistance between +sr and sr.

    Ok: resistance: 820 Ω

5 Check air bag sensor assy center

5 Check air bag sensor assy center

Sst 0984318040

  1. Disconnect the negative () terminal cable from the battery, and wait at least for 90 seconds.
  2.  connect the airbag front rh sensor connector and airbag sensor assy center connector.
  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 b1156/b1157/15 is not output.

Hint

: codes other than code b1156/b1157/15 may be output at this time, but they are not relevant to this check.

Use simulation method to check

Use simulation method to check

6 Check engine room main wire harness (to b+)(connector airbag front rh sensor)

  1. Turn the ignition switch to lock.
  2.  disconnect the negative () terminal cable from the battery, and wait at least for 90 seconds.
  3.  disconnect the connector between the engine room main wire and the instrument panel wire.
  4.  connect the negative () terminal cable to the battery, and wait at least for 2 seconds.
  5.  turn the ignition switch to on.
  6.  for the engine room main wire connector (on the airbag sensor assy center side) between the airbag sensor assy center and the airbag front rh sensor, measure the voltage between body ground and each of +sr and sr.

    Ok: voltage: below 1 v

Repair or replace instrument panel wire

Repair or replace instrument panel wire

7 Check engine room main wire harness (to ground)(connector airbag front rh sensor)

  1. Disconnect the connectors between the engine room main wire and the instrument panel wire.
  2.  for the engine room main wire connector (on the airbag sensor assy center side) between the airbag sensor assy center and the airbag front rh sensor, measure the resistance between body ground and each of +sr and sr.

    Ok: resistance: 1 mΩ or higher

Repair or replace instrument panel wire

Repair or replace instrument panel wire

8 Check engine room main wire harness(open)(connector airbag front rh sensor)

Sst 0984318040

  1. Disconnect the connectors between the engine room main wire and the instrument panel wire.
  2.  using a service wire, connect +sr and sr of the engine room main wire connector (on the airbag front rh sensor side) between the airbag sensor assy center and the airbag front rh sensor.
  3.  for the engine room main wire connector (on the airbag sensor assy center side) between the airbag sensor assy center and the airbag front rh sensor, measure the resistance between the +sr and sr.

    Ok: resistance: below 1 Ω

Repair or replace instrument panel wire

Repair or replace instrument panel wire

Circuit description
The airbag front rh sensor circuit consists of the airbag sensor assy center and airbag front rh sensor. Dtc b1156/b1157/15 is recorded when a malfunction is detected in the airbag front rh sen ...

Front airbag sensor (lh) malfunction
Dtc b1158/16 front airbag sensor (lh) malfunction Dtc b1159/16 front airbag sensor (lh) malfunction ...

Other materials:

System description
The ecm uses signals from the vehicle speed sensor and crankshaft position sensor to detect the actual gear position (1st, 2nd, 3rd or o/d gear). Then the ecm compares the actual gear with the shift schedule in the ecm memory to detect the mechanical trouble of the shift solenoid valves, th ...

Inspection procedure
1 Check ignition or starter switch assy Check the ignition switch, as shown in the illustration and table. Standard: 2 Check fuse (ecub) Remove the fuse from the instrument panel j/b.  check the continuity of the fuse. Standard: continuity 3 Check relay (mar ...

Circuit description
When a misfire occurs in the engine, hydrocarbons (hc) enter the exhaust in high concentrations. If this hc concentration is high enough, there could be an increase in exhaust emissions levels. High concentrations of hc passing through the catalyst also cause to temperature of the catalyst to ...

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