Toyota RAV4 Service Manual: Ig power source circuit
Description
This is the main power source supplied to the air conditioning amplifier when the ignition switch is on.
This power source is used for operating components, such as the air conditioning amplifier and servo motors.
Wiring diagram
Inspection procedure
- Inspect fuse (ecu-ig2)
- Remove the ecu-ig2 fuse from the instrument panel junction block.
- Measure the resistance of the fuse.
Standard resistance:
below 1 
- Check wire harness (air conditioning amplifier - battery)
- Disconnect the e36 amplifier connector.
- Measure the voltage of the wire harness side connector.
Standard voltage 
- Check wire harness (air conditioning amplifier - body ground)
- Disconnect the e36 amplifier connector.
- Measure the resistance of the wire harness side connector.
Standard resistance 
Proceed to next circuit inspection shown in problem symptoms table
Compressor circuit
Description
When the a/c switch is turned on, the magnetic clutch on signal is sent from
the air conditioning
amplifier. Then the mg clt relay turns on to operate the magnetic clutch.
Wiring diag ...
Refrigerant
...
Other materials:
Back door lock
Inspection
Inspect back door with motor lock assembly
Apply the battery voltage to the door lock motor and
check the operation of the door lock motor.
Ok
If the result is not as specified, replace the door lock
assembly. ...
System description
Key reminder warning system description
When the driver side door is opened with the key in
the ignition key cylinder and ignition switch in the
acc or off position, this system causes the key
reminder warning buzzer to sound in order to warn
the driver that the ignition key has not ...
Brake switch "B" circuit high
Description
The purpose of this circuit is to prevent the engine from stalling while
driving in the lock-up condition when
the brakes are suddenly applied.
When the brake pedal is depressed, this switch sends a signal to the ecm. Then
the ecm cancels the
operation of the lock-up clutch ...