Toyota RAV4 manuals

Toyota RAV4 (XA40) 2013-2018 Service Manual: Back-up power source circuit

Description

This is the back-up power source circuit for the air conditioning amplifier. Power is supplied even when the ignition switch is turned off and is used for functions such as the diagnostic trouble code memory.

wiring diagram

Toyota RAV4. Back-up power source circuit


Inspection procedure

  1. Inspect fuse (ecu-b2)

  1. Remove the ecu-b2 fuse from the engine room no. 2 Relay block.
  2. Measure the resistance of the fuse.

Standard resistance: below 1




  1. Check wire harness (air conditioning amplifier - battery)

Toyota RAV4. Check wire harness (air conditioning amplifier - battery)


  1. Disconnect the e37 amplifier connector.
  2. Measure the voltage of the wire harness side connector.

Standard voltage




  1. Check wire harness (air conditioning amplifier - body ground)

Toyota RAV4. Check wire harness (air conditioning amplifier - body ground)


  1. Disconnect the e37 amplifier connector.
  2. Measure the resistance of the wire harness side connector.

Standard resistance




Proceed to next circuit inspection shown in problem symptoms table

Ig power source circuit
Description This is the main power source supplied to the air conditioning amplifier when the ignition switch is on (ig). This power source is used for operating components, such as the air cond ...

Air conditioning system (for manual air conditioning system)
...

Other materials:

Precaution
Handling precaution When handling the electronic parts: Avoid any impact to electronic parts such as ecus and relays. Replace with new ones if dropped or subjected to a severe blow. Do not expose any electronic parts to high temperatures and humidity. Do not touch the connec ...

Removal
Disconnect cable from negative battery terminal Caution: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation. Remove steering column cover lower Detach the 4 claws, release the ...

Solenoid circuit
Description This solenoid is turned on in accordance with signals from the skid control ecu and controls the pressure on the wheel cylinders to control the braking force. The solenoid and solenoid relay are built into the abs and traction actuator. Hint: Dtcs c0226/21, c0236/22, c02 ...

В© 2011-2025 Copyright www.trav4.net