Toyota Corolla (E120): Terminals of ecu

1. Inspect integration relay

  1. Disconnect the connector from the integration relay.
  2. check the continuity between each terminal of the disconnected connector and the body ground, as shown in the illustration and table.

Standard:

If the result is not as specified, the vehicle’s side may malfunction.

If the result is not as specified, the vehicle’s side may malfunction.

  1.  reconnect the connector and check the voltage between each terminal and the body ground, as shown in the illustration and table.

Standard:

If the result is not as specified, the integration relay may malfunction.

If the result is not as specified, the integration relay may malfunction.

2. Inspect instrumental panel j/b (integration relay)

  1. Disconnect the connectors ia, ib, id, if, ih and ij of the instrument panel j/b.
  2.  check the continuity between each terminal of the disconnected connectors and the body ground, as shown in the illustration and table.

Standard:

If the result is not as specified, the vehicle’s side may malfunction.

If the result is not as specified, the vehicle’s side may malfunction.

  1.  reconnect the connectors and check the voltage between each terminal and the body ground, as shown in the illustration and table.

Standard:

If the result is not as specified, the integration relay or instrument panel

If the result is not as specified, the integration relay or instrument panel j/b assembly may malfunction.

Problem symptoms table

Only wireless control function does not operate

    Share this page:

    Other materials:

    Using a Bluetooth® Phone
    The hands-free system is a function that allows you to use your cellular phone without touching it. This system supports Bluetooth®. Bluetooth® is a wireless data system that allows the cellular phone to wirelessly connect to the hands-free system and make/receive calls. Before making a ph ...

    Battery
    Check the battery as follows. ■ Battery exterior Make sure that the battery terminals are not corroded and that there are no loose connections, cracks, or loose clamps. 1 Terminals 2 Hold-down clamp ■Before recharging When recharging, the battery produces hydrogen gas which is ...

    Inspection procedure
    1 Check side squib(rh) circuit(airbag sensor assy center – front seat airbag assy rh) 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 airbag assy ...