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:

Terminals of ecu
Check instrument panel junction block (main body ecu) Measure the voltage of the connectors. If the result is not as specified, the junction block (main body ecu) may have a malfunction. ...

Reassembly
Install generator rotor assembly Install the washer onto the generator rectifier end frame. Install the generator rotor onto the generator rectifier end frame. Using a 32 mm socket wrench and press, slowly push the generator drive end frame onto the generator ...

Clock
The clock can be adjusted by pressing the buttons. Adjusts the hours. Adjusts the minutes. The clock is displayed when Vehicles without a smart key system The engine switch is in the “acc” or “on” position. Vehicles with a smart key system The engine switch is in a ...

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