Test Point 4

Test point 4
Footwell blower outlet sensor
Open circuit
Short to ground

DTC 23

Diagnosis conditions
No control module fault stored.
No fault on the supply voltage (5 Volt).
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 at 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 Volt

If approx. 5 Volt 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 Ohms

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