Component Tests and General Diagnostics

SERVICE DATA INSPECTION TABLE
The following items can be read by the scan tool from the ABS-ECU input data.





WHEN THE SYSTEM IS NORMAL

WHEN SYSTEM IS ISOLATED BY THE ABS-ECU
When the ABS-ECU function is being stopped by the diagnostic test mode, the above code nos. 11- 14 for each wheel speed are not displayed.
By using this function, function checking of the hydraulic unit can be done without the need for special devices such as a hydraulic unit checker (MB991131).

ACTUATOR TEST FUNCTION
By using the scan tool the following force-activation of the actuator can be performed.

NOTE: When the ABS-ECU function is stopped, actuator testing can not be carried out.





ACTUATOR TEST SPECIFICATIONS

CAUTION: The No. 8 motor relay drive should be checked only when the inspection is needed for the troubleshooting. There is a danger that the hydraulic unit actuator pressure could become higher than necessary, which will have an adverse effect on the system.