P1621

P1621

CAN Time-out, Tiptronic - Message Counter

Diagnosis conditions
- Battery positive voltage between 10 V and 16 V
- Ignition switched on
- Internal function test for DME control module

Possible fault cause
- No communication (no signal from control module)

Affected pin
DME control module connector A, pin 60, CAN - HIGH
DME control module connector A, pin 58, CAN - LOW

Diagnosis/troubleshooting

NOTE:
- If the received signal does not appear via the CAN data bus for multiple control modules, the CAN data bus must be checked for an open circuit and/or a short circuit. In this regard, see Checking instructions/CAN data bus.
- If connector A is disconnected from the DME control module and the ignition is or was switched on, the DME Control Module TIME-OUT fault is recorded in many control modules.
- If control module connector A was disconnected from the DME in the course of troubleshooting or if the voltage supply was interrupted elsewhere (battery, fuse), the throttle adjusting unit must be adapted.

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