Possible causes, elimination, notes

The ABS/TC control module does not receive any signal from the DME control module (No. 2) (actual engine torque).

• Check wire for open circuit, short to B+ and to ground (PIN 27 on the ABS/TC control module and PIN 58 on the DME control module).

Fig 1: Identifying ABS/TC Control Module And DME Control Module

Courtesy of PORSCHE OF NORTH AMERICA, INC.