Toyota RAV4 manuals

Toyota RAV4 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:

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 front seat assembly lh Remove the front seat. For manual sea ...

Driving assist systems
To help enhance driving safety and performance, the following systems operate automatically in response to various driving situations. Be aware, however, that these systems are supplementary and should not be relied upon too heavily when operating the vehicle. Abs (anti-lock brake system) Help ...

Maintenance requirements
To ensure safe and economical driving, day-to-day care and regular maintenance are essential. It is the owner’s responsibility to perform regular checks. Toyota recommends the following maintenance: General maintenance General maintenance should be performed on a daily basis. This can be done ...

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