Toyota RAV4 (XA40) 2013-2018 Service Manual: Brake warning light remains on
Description
If any of the following conditions are detected, the brake warning light
remains on:
- The ecu connectors are disconnected from the skid control ecu.
- The brake fluid level is insufficient.
- The parking brake is applied.
- The ebd is defective.
Wiring diagram

Inspection procedure
- Prepare for inspection
- Check that both of the following conditions are satisfied.
- The brake fluid level in the brake master cylinder
reservoir is correct.
- The parking brake is released.
Hint:
When the abs warning light remains illuminated, repair
the malfunctions in the abs system first.

- Check dtc for abs
- Check if any abs dtcs are output (see page bc-47).
Result 

- Check can communication system
- Check if the can communication system dtc is output
(see page ca-34).
Result 

- Inspect skid control ecu connector
- Check if the skid control ecu connector is properly
installed.
Ok:
the skid control ecu connector is properly
installed.

- Check wire harness (skid control ecu - battery and body ground)

- Disconnect the a19 ecu connector.
- Measure the resistance of the wire harness side
connector.
Standard resistance 
- Measure the voltage of the wire harness side connector.
Standard voltage 

- Read value of intelligent tester (parking brake switch)
- Using the data list, check for proper functioning of the
parking brake switch.

Ok:
when the parking brake lever is operated, the
display changes as shown above.

- Inspect brake fluid level warning switch

- Remove the reservoir tank cap and strainer.
- Disconnect the brake fluid level warning switch
connector.
- Measure the resistance of the switch.
Hint:
A float is placed inside the reservoir. Its position can be
changed by increasing or decreasing the brake fluid
level.
Standard resistance 
Hint:
If there is no problem after the above check is finished,
adjust the brake fluid level to the max level.

- Check wire harness (level warning switch - combination meter and body
ground)
- Disconnect the e19 combination meter connector.
- Disconnect the a8 switch connector.
- Measure the resistance of the wire harness side
connectors.
Standard resistance 


- Inspect combination meter
- Inspect the combination meter (see page me-15).

Replace abs and traction actuator assembly
- Inspect parking brake switch assembly
- Remove the parking brake switch.
- Measure the resistance of the switch.

Standard resistance

- Check wire harness (junction block - parking brake switch and body
ground)
- Disconnect the 1d junction block connector.
- Disconnect the e41 switch connector.
- Measure the resistance of the wire harness side
connectors.
Standard resistance 


Replace instrument panel junction block
Description
Refer to the description of "vsc warning light remains on" (see page bc-139).
Wiring diagram
Refer to the vsc warning light circuit (see page bc-140).
Inspection procedure
N ...
Wiring diagram
Refer to the brake warning light circuit (see page bc-145).
Inspection procedure
Check can communication system
Check if the can communication system dtc is output
(see pa ...
Other materials:
Sliding roof control switch circuit
Description
If either the sliding function or tilt function does not operate, there may
be a malfunction in the sliding roof
control switch circuit.
Wiring diagram
Inspection procedure
Perform active test by intelligent tester (sliding roof operation)
Select the active test, use ...
Fuel pump shut off
system
To minimize the risk of fuel leakage when the engine stalls or
when an airbag inflates upon collision, the fuel pump shut off
system stops the supply of fuel to the engine.
Follow the procedure below to restart the engine after the system is
activated.
Vehicles without a smart key system
Tu ...
Transmitter id not registered in main mode
Description
Inspection procedure
Notice:
It is necessary to register an id code after replacing the tire pressure
warning valve and
transmitter and/or the tire pressure monitor ecu (see page tw-9).
Hint:
Set the tire pressure to the specified value.
Standard pressure:
220 kpa (2.2 ...