Fault, Fault code Possible causes, elimination, notes · Test point 1

Fault, Fault code Possible causes, elimination, notes Test point 1 Interface to Diagnosis conditions instrumentcluster No control module fault stored. No fault with supplyvoltage (terminal 15). Open circuit Short to ground Open circuit Fault code 20 1. Unplug connector B from the heating/air-conditioning control, 2. Unplugconnector III from the instrumentcluster. 3. Connectohmmeter to connector B 13 and to connector III pin 26. Display < 5 .Q Note The wire is routed via the 12-pole plug connection on the heating/air-conditioningunit. Short to ground 1. UnplugconnectorB from the heating/air-conditioningcontrol. 2. Unplug connector III from the instrumentcluster. 3. Connectohmmeterto connector B 13 and ground, Display: 00 .0. If a -5 .Q is displayed,check wiring harnessfor pinching and chafing damage. 80 -D 16 80 01 Diagnosis/troubleshooting, heating 99680Dl Printed in Germany. 11, 1998