Toyota RAV4 (XA40) 2013-2018 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 (ig). 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 e37 amplifier connector.
- Measure the voltage of the wire harness side connector.
Standard voltage
- Check wire harness (air conditioning amplifier - body ground)
- Disconnect the e37 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 ...
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 diagnos ...
Other materials:
Tire pressure warning ecu
Components
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 glove compartment door
assembly (see page i ...
Components
Fuse boxes
Engine oil filler cap
Engine oil level dipstick
Battery
Brake fluid reservoir
Radiator
Electric cooling fan
Condenser
Washer fluid tank
Engine coolant reservoir
Checking the engine oil
With the engine at operating
temperature and turned off,
check the oil level on the di ...
List of storage features
Glove box
Bottle holders
Console box
Cup holders
Storage boxes
Caution
Items that should not be left in the storage spaces
Do not leave glasses, lighters or spray cans in the storage spaces, as
this
may cause the following when cabin temperature becomes high:
Glasses may b ...
