1.1.3.4.1.8. Steering column module
Warning!Communication with ECU required.
2. Check component A89 (DTR controller unit).
Read and process fault code from control module A89 (DTR controller unit).
Possible cause and remedy
- Read and process fault code from control module A89 (DTR controller unit).
End of test
Part 1
Monitoring of signal 'Torque request' by control unit Traction systems has stopped.
Possible cause:
- N47-5 (ESP control unit)
Affected functions:
- Electronic stability program ESP
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Test 1: Engine compartment CAN test
Test 2: Check component N47-5 (ESP control unit).
1. Engine compartment CAN test
Test 1.1: Engine compartment CAN test
1.1. Engine compartment CAN test
Test 1.1.1: Procedure in case of CAN faults
Test 1.1.2: Read current CAN configuration and CAN fault codes
Test 1.1.3: Further CAN test options
1.1.1. Procedure in case of CAN faults
Test 1.1.1.1: How do I quickly reach my goal?
Test 1.1.1.2: General test information
Test 1.1.1.3: General CAN fundamentals
Test 1.1.1.4: Possible aids and their usage
1.1.1.1. How do I quickly reach my goal?
How do I quickly reach my goal?First call up menu item 'Evaluation of CAN fault codes' in case of CAN timeout fault codes and communication
errors.The resulting tests must be performed.Menu item 'Further CAN test options' should only be called up if the above-specified tests do not
produce the desired result.Note:Menu item 'General test information' can be called up for an explanation of the different CAN fault types.
1.1.1.2. General test information
Notes on CAN fault codes:CAN timeout fault
- A CAN timeout fault code is set due to the absence of a CAN input signal.The cause of this may be not only the transmitter control unit, but
also the CAN networking.
- For example:No CAN message was received from control unit A.
Bus OFF fault
- A Bus OFF fault code is set, when the control unit cannot send a certain amount of messages to the CAN bus or the messages are
incomplete.The control unit then switches off for a short time from CAN bus.
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