Electronic control unit (ECU) has the self diagnostic function. When failures occur in the system, the ABS warning light on the meter assembly indicates a malfunction.
Troubleshooting mentioned below describes the cause pursuing and service method according to the indication by the multi-function display. For troubleshooting other than these items, perform by following the normal service method.
Warning! When maintenance or checks have been performed on components related to the ABS, be sure to perform a final check before delivering the vehicle to the customer. (Refer to «[D-6] Final check»).
ABS warning light goes on and the ABS condition
1. When the ABS warning light keeps going on → It works as a normal brake.
- Detecting the malfunction by means of the ABS self diagnostic function.
2. Light goes on and off at the time of starting → ABS operation is normal.
- ABS warning light goes on for 2 seconds every time the main switch is turned on and goes off afterward.
- ABS warning lights go on while the starter switch is pushed.
3. When the ABS warning light flashes → ABS operation is normal.
- Brake switch is defective or improperly adjusted.
- Rear wheel is racing.
- Continuous riding on extremely uneven roads.
- Other defective.
Self diagnosis and services
The ABS ECU has a self diagnostic function. By utilizing this function, quick and secure services are possible. Previously occurred error phenomenon can be checked since it also installs the memory for storing malfunction history.
«In case malfunctions are detected»
It is disabled to call the malfunction code by using the multi-function display since the ABS warning light already goes on. Connect the test coupler adapter to the test connector, connect a pocket tester to the terminal of light green lead and check by its pointing needle movement.
Refer to «[B-5] Malfunction check by the ABS self diagnosis (present malfunction)».
«In case any malfunctions are not detected»
The multi-function display indicates all the malfunction codes recorded in the ABS ECU. You can check it by using a pocket tester. Note everything if more than two items of malfunction codes are recorded.
«Deleting the malfunction code»
When the malfunction service is finished, check the normal operation of vehicle then delete the malfunction code. By deleting the malfunction code memory, it is possible to pursue the cause correctly if the next defective phenomenon occurred.
Self diagnosis by ABS ECU
ABS ECU performs the static check for whole system when the main switch is turned on. It is also possible to check the malfunction while riding. It is possible to check the recorded malfunction data by using a pocket tester or the multi-function display of meter by setting the ABS ECU to the self diagnostic mode since all malfunctions which has been once detected are recorded.
Differences between the normal handling and services on a vehicle
Care should be taken not to damage components by shocks and pulling too much since the ABS components are precisely adjusted.
ABS ECU, HU, Wheel sensors and ABS motor relay cannot be disassembled.
Malfunction history in ABS ECU is recorded. Delete it when the service is finished. (This is because the past malfunction contents will be redundantly displayed when the same malfunction occurred again).