E0562

The voltage supply of circuit 87 has undervoltage.


Possible cause:

- Local undervoltage of component Y3/8n4 (Fully integrated transmission control (VGS) control unit)
Affected functions:

- Battery / On-board electrical system
- CAN Communication
- Automatic transmission Function

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Test 1: Check power supply at control unit Y3/8n4 (Fully integrated transmission control (VGS) control unit).

1. Check power supply at control unit Y3/8n4 (Fully integrated transmission control (VGS) control unit).
Operation number of operation texts and work units or standard texts and flat rates:27-0641Test sequence

- Switch off ignition.
- Separate plug connection at transmission.
- Measure voltage in transmission wiring harness using a multimeter.
- Switch on ignition.
Measure direct voltage with multimeter between 5 and 4Specified value:

- Voltage[8,5...16,4] V
Question

- Is the measurement value OK?







YES
The measurement value is OK.Possible cause of fault

- The conductors in the electrohydraulic control unit are interrupted.
- Component Y3/8n4 (Fully integrated transmission control (VGS) control unit) is defective.
Possible remedy

- Replace component Y3/8 (Electric control unit (VGS)).
Following the repair measures, the following checks MUST be carried out using the Diagnosis Assistance System, menu 'Initial startup'

- Initial startup with manual settings input for new control unit
End of test







NO

Test 1.1: The measurement value is not OK.

Test 1.2: Possible cause and remedy

Test 1.3: Test regulator and generator.

1.1. The measurement value is not OK.

1.1. No further information available.


1.2. Possible cause and remedy

1.2. No further information available.


1.3. Test regulator and generator.
Note on alternator testDepending on the engine variant, different alternators are installed.

- Alternators without networking
- Alternators networked with engine control unit
Networked alternators can be diagnosed via the engine control unit.Detailed information on alternator testing can be found in WIS.Press button F2 to go to WIS documents

1.3. No further information available.