- 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 )
C300
Component Y3/8n4 (Fully integrated transmission control (VGS) control unit) is defective. Read and observe repair information.
Possible cause:
- Y3/8n4 (Fully integrated transmission control (VGS) control unit)
Affected functions:
- Automatic transmission Function
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Test 1: Remedial action if component 'Y3/8n4 (Fully integrated transmission control (VGS) control unit)' is faulty
1. Remedial action if component 'Y3/8n4 (Fully integrated transmission control (VGS) control unit)' is faulty
Test prerequisites
- First of all process all other current fault codes.
POSSIBLE CAUSES
- Component Y3/8n4 (Fully integrated transmission control (VGS) control unit) is defective.
Preconditions
- Print out the initial quick test log before processing the fault code C300.
- Create control unit log.
Important notes before commencing repair measures
- Always use the same diagnostic unit after the repair measure.
Continue with button F2
C426
Start enable 'Drive authorization system' not issued.
Possible cause:
- Engine management
Affected functions:
- 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.
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