Toyota RAV4 (XA40) 2013-2018 Service Manual: Ecu power source circuit
Description
This is the power source for the tire pressure warning ecu.
Wiring diagram
Inspection procedure
Notice:
It is necessary to register an id code after replacing the tire pressure monitor valve and/or the tire pressure warning ecu (see page tw-9).
- Inspect fuse (ecu-ig1)
- Remove the ecu-ig1 fuse from the instrument panel junction block.
- Measure the resistance of the fuse.
Standard resistance:
below 1 
- Inspect ig1 relay
- Remove the ig1 relay from the instrument panel junction block.
- Measure the resistance of the relay.
Standard resistance
- Inspect wire harness (ecu - battery and body ground)
- Disconnect the e56 ecu connector.
- Measure the voltage of the wire harness side connector.
Standard voltage 
- Measure the resistance of the wire harness side connector.
Standard resistance 
Proceed to next circuit inspection shown in problem symptoms table
Tire pressure warning light circuit
Description
If the tire pressure warning ecu detects trouble, the tire pressure warning
light turns on and tire pressure
monitor is canceled at the same time. At this time, the ecu records a dtc i ...
Tire pressure warning receiver (w/ antenna)
Components
...
Other materials:
Rear airbag sensor
Components
On-vehicle inspection
Check rear airbag sensor (vehicle not
involved in collision)
Perform a diagnostic system check (see page rs-
49).
Check rear airbag sensor (vehicle
involved in collision and airbag has not
deployed)
Perform a diagnostic system check ...
Disassembly
Caution:
Wear protective gloves. Sharp areas on the seatback
frame, seat cushion frame and reclining adjuster may
injure your hands.
Remove rear seat headrest assembly
Remove rear seat center headrest
assembly
Remove center armrest hinge cover rh
Return the seatback to the upr ...
Contact/call history
settings
The contact can be transferred from a bluetooth® phone to the system.
The contact also can be added, edited and deleted.
The call history can be deleted and contact and favorites can be
changed.
Display the “phone/message settings” screen.
Select “contact/call history settings” ...
