P0758

P0743
Solenoid valve 3 - Open circuit/short circuit to ground, short circuit to B+.

P0753
Solenoid valve 1 - Open circuit/short circuit to ground, short circuit to B+.

P0758
Solenoid valve 2 - Open circuit/short circuit to ground, short circuit to B+.

Function:
The solenoid valves are accommodated on the valve chamber. They control the function of the automatic transmission via the electronic transmission control system.

Diagnosis Conditions:
- Ignition on (only for short circuit to B+)
- Vehicle driving (all fault types)




Wiring Diagram:




Diagnosis Procedure:



1 Check solenoid valve with wiring.
1. Pull off Tiptronic control module connector.
2. Connect ohmmeter to Tiptronic control module connector pin 30 and pin 52 (solenoid valve 2 pin 33 and pin 52, solenoid valve 3 pin 32 and pin 52).

Indication: 34 ohm ± 10%.

2 Check wires from Tiptronic control module to transmission connector for continuity.
1. Additionally disconnect connector on transmission.
2. Connect ohmmeter to Tiptronic control module connector pin 30 and transmission connector pin 8 (solenoid valve 2 pin 33 and pin 9, solenoid valve 3 pin 32 and pin 4).

Indication: 0...5 ohm.

If infinite ohm is indicated, check wiring harness for crushing and chafing damage.

2 Check wires from Tiptronic control module to transmission connector for short circuit to ground.
1. Connect ohmmeter to Tiptronic control module connector pin 30 and ground (solenoid valve 2 pin 33 and ground).

Indication: infinite ohm.

If 0.. .5 ohm is indicated, check wiring harness for crushing and chafing damage.

2 Check wires from Tiptronic control module to transmission connector for short circuit to plus.
1. Switch on ignition.
2. Connect voltmeter to Tiptronic control module connector pin 30 and ground (solenoid valve 2 pin 33 and ground).

Indication: 0 Volt.

If battery voltage is indicated, check wiring harness for crushing and chafing damage.