Diagnosis Conditions
- No control module fault stored.
- No fault on the supply voltage (5 Volts).
Signal Implausible
1. Check outside air / recirculation valve for smooth operation.
2. Pull off connectors A, B, C and D on the heating/air conditioning control.
3. Pull off connector on the outside air / recirculation valve drive motor.
4. Check drive motor circuits for continuity.
- Connect ohmmeter to connector D-13 and drive motor connector pin 1.
Display: < 5 ohms
- Connect ohmmeter to connector D-5 and drive motor connector pin 2.
Display: < 5 ohms
- Connect ohmmeter to connector B-17 and drive motor connector pin 3.
Display: < 5 ohms
- Connect ohmmeter to connector C-8 and drive motor connector pin 4.
Display: < 5 ohms
- Connect ohmmeter to connector A-12 and drive motor connector pin 5.
Display: < 5 ohms
5. Check wire from connector D-13 to drive motor pin 1 for short to B+ and short to ground.
6. Check wire from connector D-5 to drive motor pin 2 for short to plus and short to ground.
7. Check wire from connector B-17 to drive motor pin 3 for short to B+ and short to ground.
8. Check wire from connector C-8 to drive motor pin 4 for short to plus and short to ground.
9. Check wire from connector A-12 to drive motor pin 5 for short to B+ and short to ground.
Test Point 11
TEST POINT 11
A/C Signal Implausible
DTC 30
Note:
This fault can be determined only during the system test.
Signal Implausible
1. Check refrigerant.
2. Check high/low pressure switch.
Battery positive voltage must be present at terminal 1 on the high/low pressure switch (with ignition on) if there is enough refrigerant in the
system.
3. Check heating activation relay.
Battery positive voltage must be present at terminal 87 if the ignition is switched on.
4. Check the air conditioning compressor relay.