Test Point 4

TEST POINT 4
Footwell Blower Outlet Sensor Open Circuit, Short To Ground

DTC 23

Fault Effect: Substitute value: 50 °C

Diagnosis Conditions
- No control module fault stored.
- No fault on the supply voltage (5 Volts).
- Outside temperature higher than - 30 °C.

Open Circuit

1. Pull off connectors A and B on the heating/air conditioning control.

2. Connect ohmmeter to connectors A-12 and B-5.

Display: approx. 2.8 kohms @ 23 °C.

3. Pull off connector on the blower outlet sensor.

4. Connect ohmmeter to connector A-12 and blower outlet sensor connector pin 2.

Display: < 5 ohms

5. Connect ohmmeter to connector B-5 and blower outlet sensor connector pin 1.

Display: < 5 ohms

6. Connect voltmeter to connector B-5 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 B on the heating/air conditioning control.

2. Connect ohmmeter to connector B-5 and ground.

Display: infinity

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