- X63/4 (CAN databus adapter connector, 2-pin)
- Test connectors and wiring for CAN of engine compartment CAN control modules.
- Control unit
Communication with ECU required ( Measuring system )
2. Check the CAN communication with control unit N22 (AAC [KLA] control and operating unit).
Warning!Communication with ECU required.
3. Interior CAN check
Warning!Communication with ECU required.
EC401
One or more signals sent from control unit Engine management via the CAN bus is implausible.
Possible cause:
- Engine management
Affected functions:
- CAN Communication
- Automatic transmission Function
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Test 1: Fault in CAN communication with control unit Engine management.
1. Fault in CAN communication with control unit Engine management.
Operation number of operation texts and work units or standard texts and flat rates:27-0641WARNING
- This is not a function error of control module Y3/8n4 (Fully integrated transmission control (VGS) control unit) and does not justify
replacement.
Possible cause for the entry of this event code
- Operational fault of component Engine management
Possible measures
- Read out fault memory of control unit Engine management.
- Process displayed fault codes in control module Engine management.
End of test
Part 1
No CAN message was received from control unit N15/5 (Electronic selector lever module (ESM [EWM])).
Possible cause:
- Check the CAN communication with control unit N15/5 (Electronic selector lever module control unit).
- Drive train CAN bus
Affected functions:
- CAN Communication
- Automatic transmission Function
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Test 1: Engine compartment CAN test
Test 2: Drive train CAN test
1. Engine compartment CAN test
Test 1.1: Procedure in case of CAN faults
