Test Point 1

Test point 1
Interface to instrument cluster

Open circuit Short to ground

Fault code 20

Diagnosis conditions
No control module fault stored.
No fault with supply voltage (terminal 15).

Open circuit
1. Unplug connector B from the heating/air-conditioning control.
2. Unplug connector III from the instrument cluster.
3. Connect ohmmeter to connector B 13 and to connector III pin 26.
Display [<] 5 Ohms

NOTE: The wire is routed via the 12-pole plug connection on the heating/air-conditioning unit.

Short to ground
1. Unplug connector B from the heating/air-conditioning control.
2. Unplug connector III from the instrument cluster.
3. Connect ohmmeter to connector B 13 and ground.
Display: Infinity Ohm

If 0 - 5 ohms is displayed, check wiring harness for pinching and chafing damage.