Toyota RAV4 manuals

Toyota RAV4 Service Manual: Srs warning light remains on

Description

The srs warning light is located on the combination meter.

When the srs is normal, the srs warning light comes on for approximately 6 seconds after the ignition switch is turned from off to on, and then goes off automatically.

If there is a malfunction in the srs, the srs warning light comes on to inform the driver of a problem.

When terminals tc and cg of the dlc3 are connected, the dtc is displayed by blinking the srs warning light.

The srs is equipped with a voltage-increase circuit (dc-dc converter) in the center airbag sensor in case the source voltage drops.

When the battery voltage drops, the voltage-increase circuit (dc-dc converter) functions to increase the voltage of the srs to normal voltage.

A malfunction in this circuit is not recorded in the center airbag sensor . The srs warning light automatically goes off when the source voltage returns to normal.

The signal to illuminate the srs warning light is transmitted from the center airbag sensor to the combination meter through the multiplex communication system.

Wiring diagram

Toyota RAV4. Srs warning light remains on


Inspection procedure

Check battery

  1. Measure the voltage of the battery.

Standard voltage: 11 to 14 v



  1. Check connector

  1. Turn the ignition switch off.
  2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
  3. Check that the connectors are properly connected to the center airbag sensor and combination meter.

Ok: the connectors are properly connected.



  1. Check wire harness (source voltage of center airbag sensor assembly)

Toyota RAV4. Check wire harness (source voltage of center airbag sensor assembly)


  1. Disconnect the e45 connector from the center airbag sensor .
  2. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
  3. Turn the ignition switch on.
  4. Operate all components of the electrical system (defogger, wipers, headlight, heater blower, etc.).
  5. Measure the voltage of the wire harness side connectors.

Standard voltage


  1. Turn the ignition switch off.
  2. Measure the resistance of the wire harness side connectors.

Standard resistance




  1. Check wire harness (source voltage of combination meter)

Toyota RAV4. Check wire harness (source voltage of combination meter)


  1. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
  2. Disconnect the e19 connector from the combination meter.
  3. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
  4. Turn the ignition switch on.
  5. Measure the voltage of the wire harness side connectors.

Standard voltage


  1. Turn the ignition switch off.
  2. Measure the resistance of the wire harness side connectors.

Standard resistance




  1. Check srs warning light

  1. Turn the ignition switch off.
  2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
  3. Connect the e19 connector to the combination meter.
  4. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
  5. Turn the ignition switch on.
  6. Check the srs warning light condition.

Ok: after the primary check period, srs warning light goes off for approximately 10 seconds, and turning it on is continued.

Hint:

The primary check period shows approximately 6 seconds after the ignition switch is on.



Replace center airbag sensor assembly

Source voltage drop
Description The srs is equipped with a voltage-increase circuit (dc-dc converter) in the center airbag sensor in case the source voltage drops. When the source voltage drops, the voltage-increa ...

Srs warning light does not come on
Description The srs warning light is located on the combination meter. When the srs is normal, the srs warning light comes on for approximately 6 seconds after the ignition switch is turned fro ...

Other materials:

Battery current sensor circuit
Description The battery current sensor installed on the positive (+) battery terminal detects the amount of current supplied from the generator. The battery current sensor changes current to voltage (at the positive (+) battery terminal) and sends it to the ecm. The ecm controls th ...

Wireless remote control
Function summary The wireless remote control can be used to lock and unlock the vehicle. It also opens and closes the back door. Vehicles without a smart key system Locks all the doors Unlocks all the doors Pressing the button unlocks the driver’s door. Pressing the button again wi ...

Check mode procedure
Description Check mode has a higher sensitivity to malfunctions and can detect malfunctions that normal mode cannot detect. Check mode can also detect all the malfunctions that normal mode can detect. In check mode, dtcs are detected with 1 trip detection logic. Check mode pro ...

© 2011-2019 Copyright www.trav4.net