Test Point 21

TEST POINT 21
Instrument Cluster Activation No Signal Change

DTC 56

Fault Effect: Reduced driving program.

Note:
The Tiptronic control module (pin 25) is connected with instrument cluster (pin II/17) via a serial data lead.

Specification:
Signal type PWm
Frequency 50 Hz
Level 0 - 12V






Signal coding

Note:
There is no fault if the pulse width is 70 % with the engine running and with the selector lever in position "P".






1. Test the PWm signal with an oscilloscope.

2. Check wire from Tiptronic control module connector pin 25 to the instrument cluster connector II (white) pin 17 for open circuit, short to ground and short to B+.