Toyota RAV4 manuals

Toyota RAV4 Service Manual: Ecm power source circuit

Description

When the ignition switch is turned on, the battery voltage is applied to the igsw of the ecm. The output signal from the mrel terminal of the ecm causes a current to flow to the coil, closing the contacts of the integration relay (efi main relay) and supplying power to either terminal +b or +b2 of the ecm.

Wiring diagram

Toyota RAV4. Wiring diagram


Inspection procedure

  1. Inspect fuses (p/i, am2, ig2, efi main, ign)

Toyota RAV4. Inspect fuses (p/i, am2, ig2, efi main, ign)


  1. Remove the p/i fuse, am2 fuse, ig2 fuse and efi main fuse from the engine room no. 1 Relay block.
  2. Remove the ign fuse from the instrument panel junction block.
  3. Measure the resistance of the fuses.

Standard resistance: below 1


  1. Reinstall the fuses.



  1. Inspect relay (ig2, efi main)

  1. Remove the integration relay and ig2 relay from the engine room no. 1 Relay block.
  2. Measure the resistance between the terminal of the integration relay.

Standard resistance


Toyota RAV4. Inspect relay (ig2, efi main)


  1. Measure the resistance between the terminal of the ig2 relay.

Standard resistance


  1. Reinstall the relay.



  1. Check harness and connector (ecm - body ground)

  1. Disconnect the b30 ecm connector.
  2. Measure the resistance.

Standard resistance


  1. Reconnect the ecm connector.



  1. Inspect ecm (igsw voltage)

  1. Disconnect the b30 and a9 ecm connectors.
  2. Turn the ignition switch on.
  3. Measure the voltage between the terminals of the b30 and a9 ecm connectors.

Standard voltage


  1. Reconnect the ecm connector.


  1. Check harness and connector (relay block - ecm, ignition switch, battery)

Toyota RAV4. Check harness and connector (relay block - ecm, ignition switch, battery)


  1. Disconnect the a9 ecm connector.

Toyota RAV4. Check harness and connector (relay block - ecm, ignition switch, battery)


  1. Disconnect the e3 ignition switch connector.
  2. Disconnect the battery positive terminal.

Toyota RAV4. Check harness and connector (relay block - ecm, ignition switch, battery)


  1. Remove the am2 fuse and ig2 relay.
  2. Measure the resistance between the terminals.

Standard resistance (check for open)


Standard resistance (check for short)


  1. Reinstall the relay and fuse.
  2. Reconnect the connectors.



  1. Inspect ignition switch (see page es-261)



  1. Check harness and connector (integration relay - ecm, battery, body ground)

Toyota RAV4. Check harness and connector (integration relay - ecm, battery, body ground)


  1. Disconnect the a9 ecm connector.

Toyota RAV4. Check harness and connector (integration relay - ecm, battery, body ground)


  1. Remove the integration relay from the engine room no. 1 Relay block.
  2. Disconnect the integration relay connector.
  3. Remove the p/i fuse from the engine room no. 1 Relay block.
  4. Check the resistance between the terminals.

Standard resistance (check for open)


Standard resistance (check for short)


  1. Reconnect the connectors.
  2. Reinstall the integration relay and p/i fuse.


Evap system
Related dtcs If any evap system dtcs are set, the malfunctioning area can be determined using the table below. Notice: If the reference pressure difference between the first and second ch ...

Vc output circuit
Description The ecm constantly generates 5 v power from the battery voltages supplied to the +b (batt) terminal to operate the microprocessor. The ecm also provides this power to the sensors thr ...

Other materials:

Fuel pump control circuit
Description When the engine is cranked, the starter relay drive signal output from the star terminal of the ecm is input into the sta terminal of the ecm, and ne signal generated by the crankshaft position sensor is also input into the ne+ terminal. Thus, the ecm interprets that the engine is ...

Occupant classification system malfunction
Description The occupant classification system circuit consists of the center airbag sensor and the occupant classification system. When the center airbag sensor receives signals from the occupant classification ecu, it determines whether or not the front passenger airbag, front seat side ...

Passenger airbag on / off indicator circuit malfunction
Description The passenger airbag on / off indicator circuit consists of the center airbag sensor and the heater control panel*1 or *2. This circuit indicates the operation condition of the front passenger airbag, the front passenger side airbag and passenger side seat belt pretensioner ...

В© 2011-2019 Copyright www.trav4.net