Test Point 6

TEST POINT 6
Supply Voltage (5 Volt) Voltage Too High, Voltage Too Low

DTC 25

Diagnosis Conditions
- No control module fault stored.

Voltage Too High

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

2. Connect voltmeter to C 8 and ground. Switch on ignition.

Display: 0 Volts

If battery positive voltage is displayed, check wiring harness for pinching and chafing.

3. Push on connector C.

4. Connect voltmeter to C 8 and ground. Switch on ignition.

Display: 5 ± 0.5 Volts

If more than 5.5 Volts is displayed, replace the heating/air cond. control.

Voltage Too Low

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

2. Pull off all connectors on the valve drive motors.

3. Connect ohmmeter to connector C 8 and ground.

Display: infinity

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

4. Check potentiometer in the drive motors.

- Temperature mixing valve:

Connect ohmmeter to pins 1 and 3.

Display: 4 - 5 kohms @ 23 °C

- Footwell / defrost valve:

Connect ohmmeter to pIns 1 and 3.

Display: 4 - 5 kohms @ 23 °C

- Central valve:

Connect ohmmeter to pins 1 and 3.

Display: 4 - 5 kohms @ 23 °C

- Outside air / recirculation valve:

Connect ohmmeter to pins 4 and 5.

Display: 4 - 5 kohms @ 23 °C