Test Point 4

Test point 4
Footwell blower outlet sensor

Open circuit Short to ground

Fault code 23

Diagnosis conditions
No control module fault stored.
No fault with supply voltage (5 volts).
Outside temperature higher than - 30 °C.

Open circuit
1. Unplug connectors A and B from the heating/air-conditioning control.
2. Connect ohmmeter to connectors A 12 and B 5.
Display: approx. 2.8 kOhms at 23 °C
3. Unplug connector from 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 are displayed, check wiring harness for pinching and chafing damage.

Short to ground
1. Unplug connector B from the heating/air-conditioning control.
2. Connect ohmmeter to connector B 5 and ground.
Display: Infinity Ohm

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