Test point 13: Troubleshooting:
- Warm sensor with fingers and observe the increase in temperature on PST2. If no change in temperature is determined or displayed:
- Disconnect outside temperature sensor
- Switch ignition on
- Measure the voltage at the outside temperature plug pin 1 and pin 2
Voltmeter display: approx. 4.5 - 5 V
- Ohmmeter on pin 1 and pin 2 on the outside temperature sensor
Ohmmeter display at 20° C: 2.5 - 3 KΩ
- Switch off ignition
- Pull off plug I on the instrument cluster
- Switch ignition on
- Measure the voltage between plug I on outside temperature sensor, pin 1 and ground
Voltmeter display: 0 V
- Switch off ignition
- Ohmmeter on outside temperature sensor plug pin 2 and ground
Ohmmeter display: < 5 Ω
- Ohmmeter on instrument cluster plug I pin 17 and plug on outside temperature sensor pin 1
Ohmmeter display: < 5 Ω
If no fault is established in the wires or on the outside temperature sensor, replace the instrument cluster.