Test Point 2

TEST POINT 2
Outside Temperature Sensor Open Circuit, Short To Ground

DTC 21

Fault Effect: Substitute value: 10 °C

Diagnosis Conditions
- No control module fault stored.
- No fault on the supply voltage (5 Volt).

Open Circuit

1. Pull off connector A on the heating/air conditioning control.

2. Connect ohmmeter to connector A-7 and A-12.

Display: Approx. 1.2 kohms @ 23 °C

3. Pull off connector on the outside temperature sensor.

4. Connect ohmmeter to connector A-7 and pin 1 (connector, outside temperature sensor).

Display: 0 - 5 ohms

5. Connect ohmmeter to connector A-12 and pin 2 (connector, 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 is displayed, check the wiring for pinching and chafing.

Short to Ground

1. Pull off connector A on the heating/air conditioning control.

2. Connect ohmmeter to connector A-7 and ground.

Display: infinity

If 0 - 5 ohms is displayed, check the wiring for pinching and chafing.