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:
Disassembly (2006/01- )
Remove front axle inboard joint boot no. 2
Clamp
One touch type:
using a screwdriver, remove the no. 2 Inboard joint
boot clamp, as shown in the illustration.
Claw engagement type:
using needle-nose pliers, remove the no. 2 Inboard
joint boot clamp, as shown in the illustra ...
Check mode procedure
Hint:
Intelligent tester only:
compared to normal mode, check mode is more sensitive to
malfunctions. Therefore, check mode can detect the
malfunctions that cannot be detected by normal mode.
Notice:
All the stored dtcs and freeze frame data are erased if:
The ecm is changed from normal mo ...
Precaution
Notice:
Take extra care to replace each part properly. Improper
installation or repair could affect the performance of
the brake system and cause a driving hazard.
It is very important to keep the brake system parts and
the work area clean when repairing the brake system.
If the vehicl ...
