Test Point 3

Test point 3

Interior temperature sensor

Open circuit
Short to ground
Fault code 22

Diagnosis conditions

No control module fault stored.
No fault with supply voltage (5 volts).
Outside temperature higher than - 40 �C.

Open circuit

1. Unplug connector A from the heating/air-conditioning control.

2. Connect ohmmeter to connectors A 10 and A 12.
Display: approx. 3 k Ohms at 23 �C

Note

The wires to the interior temperature sensor are routed via two additional plug connections on the heating/air-conditioning control.

3. Unplug connector from the interior temperature sensor.

4. Connect ohmmeter to connector A 10 and interior sensor connector pin 5.
Display: < 5 Ohms

5. Connect ohmmeter to connector A 12 and interior sensor connector pin 4.
Display: < 5 Ohms

6. Connect voltmeter to connector A 10 and ground.
Switch on ignition.
Display: 0 volts

If approx. 5 volts are displayed, check wiring harness for pinching and chafing damage.

Short to ground

1. Unplug connector A from the heating/air-conditioning control.

2. Connect ohmmeter to connector A 7 and ground.
Display: Infinite Ohms

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