Test Point 9

Fault, DTC 93 Test Point 9

Coolant shutoff valve Open circuit/short to ground, short to B+

Possible causes, elimination, notes

Fault effect:
The reduced driving program is activated if there is an open circuit/short to ground.

In the event of a short to B+, the fault is only entered in the fault memory.

NOTE: The function of the coolant shutoff valve can be tested with the Porsche System Tester 2 (Drive links/Coolant shutoff valve).

1. Check valve with the tester.
2. Check internal resistance of the valve. To do this, pull off plug connection of the valve and connect ohmmeter to pins 1 and 2.

Nominal value: 25... 35 Ohms.

3. Check wire from the Tiptronic control module connector pin 51 to the coolant shutoff valve connector pin 1 for open circuit, short to ground and short to B+.