Check the Connection to the Control Module [U]
U. Check the connection to the control moduleUA. Fault-tracing information
Condition
- DTCs not posted
- Normal battery voltage
- Charging system works
- Fault is permanent
Possible source
- Control module not connected or poor connection
Fault-tracing begins with UB. Check the connection to the control module.
UB. Check the connection to the control module
[UB1]
Check the connection to the control module
- Ignition off
Check that the control module connector is connected correctly to the control module and that the connector's bottoming is working
Check that the control module connector, plug and socket are not damaged
Is the control module connected correctly ?
Yes: Fault not found
No: UB2
[UB2]
Take appropriate action for the control module connection
Connect the control module
Then continue with: UB3
[UB3]
Verification
Hint: After repair it is necessary to check that the fault has been rectified
- Ignition off
- Reconnect the connections, components etc.
- Ignition on
When the ignition is switched on, the ABS warning light is activated by the control module. Check that the warning light goes out after approx.2 seconds
Note! The warning light will not go out it a fault is registered in the control module
Does the warning light go out shortly after being activated?
Yes: Fault corrected
No: UB4
[UB4]
Fault-tracing information
The fault should now have been diagnosed and corrected. Since this is not the case the fault-tracing has failed.
Do you want to exit fault-tracing?
Yes: Fault not corrected
No: UB1