DTC 7: An Open in the Recirculation Control Motor Circuit
- 1. Problem verification:
1. Turn the vehicle to the OFF (LOCK) mode and then the ON mode.
2. Do the Self-Diagnostic Function with the HVAC control unit .
3. Check for DTCs.
Is DTC 7 indicated?
YES
Go to step 2.
NO
Intermittent failure. Check for loose wires or poor connections on the recirculation control motor circuit.
- 2. Determine possible failure area (RFD-P/FRD-P line, others):
1. Turn the vehicle to the OFF (LOCK) mode.
2. Disconnect the following connector.
Recirculation control motor 7P connector 3. Turn the vehicle to the ON mode.
4. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode Recirculation control motor 7P connector: disconnected Test point 1 Recirculation control motor 7P connector No. 2 Test point 2 Body ground Is there about 5 V?
YES
The RFD-P/FRD-P wire is OK. Go to step 3.
NO
Go to step 4.
- 3. Open wire check (SENSOR COM/SENS-COM line):
1. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode Recirculation control motor 7P connector: disconnected Test point 1 Recirculation control motor 7P connector No. 1 Test point 2 Recirculation control motor 7P connector No. 2 Is there about 5 V?
YES
The SENSOR COM/SENS-COM wire is OK. Replace the recirculation control motor .
NO
Repair an open in the wire between the HVAC control unit and the recirculation control motor.
- 4. Open wire check (RFD-P/FRD-P line):
1. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode Recirculation control motor 7P connector: disconnected Test point 1 HVAC control unit 32P connector No. 21 Test point 2 Body ground Is there about 5 V?
YES
Repair an open in the wire between the HVAC control unit and the recirculation control motor.
NO
The RFD-P/FRD-P wire is OK. Replace the HVAC control unit .
