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:
Body
General maintenance
Tighten bolts and nuts
Tighten the bolts and nuts on the chassis parts listed
below, if necessary.
Front axle and suspension
Drivetrain
Rear axle and suspension
Brake system
Engine mounting
Other chassis parts
Tighten the bolts and nuts on the bo ...
Front suspension lower no. 1 Arm
Components
Removal
Remove front wheel
Remove hood sub-assembly
Remove the hood (see page ed-4).
Suspend engine assembly
Install the no. 1 And no. 2 Engine hangers with the
bolts as shown in the illustration.
Torque: 38 n*m (387 kgf*cm, 28 ft.*Lbf)
parts no.
...
Diagnostic trouble code chart (2006/01- )
Hint:
When the air conditioning system functions properly, dtc
b1400/00 is output.
Hint:
*1: Dtc b1422/22 (compressor lock sensor circuit) is
indicated only for a currently occurring malfunction for 2grfe.
*2: Compressor and pulley for 2az-fe, compressor and
magnetic clutch for 2gr-fe ...
