Toyota RAV4 (XA40) 2013-2018 Service Manual: Abs warning light remains on
Description
If any of the following conditions are detected, the abs warning light remains on:
- The ecu connectors are disconnected from the skid control ecu.
- There is a malfunction in the skid control ecu internal circuit.
- There is an open or short in the wire harness between the combination meter and the skid control ecu.
Hint:
The intelligent tester may not be used when there is a malfunction in the skid control ecu.
Wiring diagram
Inspection procedure
- 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 
- Perform active test by intelligent tester (abs warning light)
- Select the active test, generate a control command, and then check that the abs warning light operates.
Ok: the abs warning light is turned on or off.
Hint:
When the abs warning light remains illuminated, opens in the wire harness of the combination meters or abnormalities in the meter circuit should be considered.
Replace abs and traction actuator assembly
Control module communication bus off
Description
Inspection procedure
The skid control ecu inputs the signals from the ecm, steering angle sensor,
and yaw rate and
acceleration sensor via can communication system.
Ch ...
Abs warning light does not come on
Wiring diagram
Refer to the abs warning light circuit (see page bc-135).
Inspection procedure
Check can communication system
Check if the can communication system dtc is output
(see page ...
Other materials:
If your vehicle overheats
The following may indicate
that your vehicle is overheating.
The engine coolant temperature
gauge shows the red zone or a
loss of engine power is
experienced. (For example,
the vehicle speed does not
increase.)
"Engine Coolant Temp High
Stop in a Safe Place See
Owner's Manual" is shown
on ...
Hazard warning switch circuit
Description
When the hazard warning signal switch is turned on, the turn signal flasher
relay (marking: flsh) in the
main body ecu turns on to flash the hazard warning signal lights.
Wiring diagram
Inspection procedure
Perform active test by intelligent tester
Connect the intelli ...
Removal
Discharge fuel system pressure (see page
fu-9)
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 hood sub-assembly ( ...
