Toyota RAV4 (XA40) 2013-2018 Service Manual: Horn relay
On-vehicle inspection
- Remove engine room no. 1 Relay block cover
- Inspect integration relay (unit a: horn relay)
- Using a screwdriver, detach the 2 claws and disconnect the integration relay from the engine room junction block.
Hint:
Tape the screwdriver tip before use.
- Measure the resistance of the integration relay.
Standard voltage 
If the result is not as specified, replace the integration relay.
- Install engine room no. 1 Relay block cover
Horn system
Parts location
System diagram
Problem symptoms table
Hint:
Use the table below to help determine the cause of the
problem symptom. The potential causes of the symptoms are
listed in ...
Low pitched horn
Components
Removal
Remove radiator support opening cover
(see page et-4)
Remove front fender liner lh (see page et-4)
Remove front fender liner rh (see page et-4)
Remove front bumper ...
Other materials:
Power supply relay failure
Description
If the power steering ecu detects these dtcs, it shuts off the motor relay
circuit (built into the power
steering ecu) and stops power assist.
Inspection procedure
Reconfirm dtc
Check for dtc.
Ok:
dtc is not output.
Replace power steering ecu ...
Diagnosis system
Bus check
Select "bus check" from the "obd / mobd
menu" screen.
Hint:
The ecus and sensors that are properly connected
to the can communication system can be displayed
using the intelligent tester via can vim.
Press "enter" on the intelligen ...
On-vehicle inspection
Hint:
When pressing the switch for 0.3 Seconds or less, the roof
glass moves but auto operation does not operate.
Check auto operation
Turn the ignition switch on.
When the roof glass is fully closed, press the slide
open switch for 0.3 Seconds or more. Check that
the roof glass au ...
