Test Point 2

Test point 2

Outside temperature sensor

Open circuit
Short to ground
Fault code 21

Diagnosis conditions

No control module fault stored.
No fault with supply voltage (5 volts).

Open circuit

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

2. Connect ohmmeter to connectors A 7 and A 12.
Display: approx. 1.2 k Ohms at 23 �C

3. Unplug connector from the outside temperature sensor.

4. Connect ohmmeter to connector A 7 and pin 1 (connector of outside temperature sensor).
Display: 0 - 5 Ohms

5. Connect ohmmeter to connector A 12 and pin 2 (connector of outside temperature sensor).
Display: 0 - 5 Ohms

6. Connect voltmeter to connector A 7 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.