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 1634.
- Create control unit log.
Important notes before commencing repair measures
- Always use the same diagnostic unit after the repair measure.
Continue with button F2
Sequence
- Data are being read from the old control unit.
Start process with button F2.
1. No further information available.
1638
Component Y3/8n4 (Fully integrated transmission control (VGS) control unit) is defective.
Possible cause:
- Y3/8n4 (Fully integrated transmission control (VGS) control unit)
Affected functions:
- Automatic transmission Function
-------------------------------------------------
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 1638.
- Create control unit log.
Important notes before commencing repair measures
- Always use the same diagnostic unit after the repair measure.
Continue with button F2
Sequence
- Data are being read from the old control unit.
Start process with button F2.
1. No further information available.
1639
Component Y3/8n4 (Fully integrated transmission control (VGS) control unit) is defective.
