- Connect ohmmeter to connector A-12 and drive motor connector pin 3.
Display: < 5 ohms
- Connect ohmmeter to connector D-10 and drive motor connector pin 4.
Display: < 5 ohms
- Connect ohmmeter to connector D-2 and drive motor connector pin 5.
Display: < 5 ohms
5. Check wire from connector C-8 to drive motor pin 1 for short to plus and short to ground.
6. Check wire from connector B-8 to drive motor pin 2 for short to plus and short to ground.
7. Check wire from connector A-12 to drive motor pin 3 for short to B+.
8. Check wire from connector D-10 to drive motor pin 4 for short to B+ and short to ground.
9. Check wire from connector D-2 to drive motor pin 5 for short to plus and short to ground.
Test Point 8
TEST POINT 8
motor, Central Valve Signal Implausible
DTC 27
Fault Effect: Valve cannot be adjusted
Diagnosis Conditions
- No control module fault stored.
- No fault on the supply voltage (5 Volts).
Signal Implausible
1. Check central 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 central valve drive motor.
4. Check drive motor circuits for continuity.
- Connect ohmmeter to connector A-12 and drive motor connector pin 1.
Display: < 5 ohms
- Connect ohmmeter to connector B-9 and drive motor connector pin 2.
Display: < 5 ohms
- Connect ohmmeter to connector C-8 and drive motor connector pin 3.
Display: < 5 ohms
- Connect ohmmeter to connector D-4 and drive motor connector pin 4.
Display: < 5 ohms
- Connect ohmmeter to connector D-12 and drive motor connector pin 5.
Display: < 5 ohms
5. Check wire from connector A-12 to drive motor pin 1 for short to B+.
6. Check wire from connector B-9 to drive motor pin 2 for short to plus and short to ground.