Voltage too low

1. Check the generator.

2. Check or charge the battery.

3. Check contact resistance of wire connections

Fault, DTC

Possible causes, elimination, notes

Test point 6

Supply voltage (5 Volt)

Diagnosis conditions

No control module fault stored.

Voltage too high Voltage too low DTC 25

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.

If battery positive voltage is displayed, check wiring harness for pinch-

3. Push on connector C.

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

If more than 5.5 Volt 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: °°

If 0 - 5 i2 is displayed, check the wiring for pinching and chafing.

Display:

0 Volt

Fault, DTC

Possible causes, elimination, notes

4. Check potentiometer in the drive motors.

Temperature mixing valve: Connect ohmmeter to pins 1 and 3. Display: 4 - 5 kQ at 23 °C

Footwell / defrost valve:

Connect ohmmeter to pins 1 and 3.

Central valve:

Connect ohmmeter to pins 1 and 3.

Display:

Outside air / recirculation valve: Connect ohmmeter to pins 4 and 5. Display: 4 - 5 kQ at 23 °C

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