Test Point 1
Test point 1Interface 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: Infinite Ohms
If 0 - 5 Ohms is displayed, check wiring harness for pinching and chafing damage.