Test Point 13

TEST POINT 13
Outside Temperature Sensor Value

Note:
In the Actual Values menu item of the PST 2, the current values of the following parameters can be read out and checked.

- Engine off

PST 2 display: Tester display approximately equals the ambient temperature

Troubleshooting

- Warm sensor with fingers and observe the increase in temperature on PST 2. 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

Display: approx. 4.5 - 5 Volts

- Ohmmeter on pin 1 and pin 2 on the outside temperature sensor

Display: 2.5 - 3.0 Kohms @ 20 °C

- 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

Display: 0 Volts

- Switch off ignition

- Ohmmeter on outside temperature sensor plug pin 2 and ground

Display: < 5 ohms

- Ohmmeter on instrument cluster plug I pin 17 and plug on outside temperature sensor pin 1

Display: < 5 ohms

- If no fault is established in the wires or on the outside temperature sensor, replace the instrument cluster.