B27A0

B27A0, B27A1 INTAKE DOOR MOTOR

DTC Logic


DTC DETECTION LOGIC

NOTE:
- If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to HAC55, "DTC Logic".
- If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010. "DTC Logic" Control Unit.





*: A/C auto amp. operates intake door motor according to target value of PBR opening angle at 40% when performing self-diagnosis.

DTC CONFIRMATION PROCEDURE


1. PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT
1.Set the vehicle to READY.
2.Select "Self Diagnostic Result" mode of "HVAC" using CONSULT.
3.Check DTC.
Is DTC detected?
YES- Refer to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK INTAKE DOOR MOTOR OPERATION

1.Turn power switch ON.
2.Operate intake switch and check by operation sound that intake door motor operates.
Does the intake door motor operate?
YES- GO TO 2.
NO- GO TO 8.

2. CHECK INTAKE DOOR MOTOR PBR POWER SUPPLY

1.Disconnect intake door motor connector.
2.Turn power switch ON.
3.Check voltage between intake door motor harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- GO TO 7.

3. CHECK INTAKE DOOR MOTOR PBR GROUND CIRCUIT FOR OPEN

1.Turn power switch OFF.
2.Disconnect A/C auto amp. connector.
3.Check continuity between intake door motor harness connector and A/C auto amp. harness connector.





Is the inspection result normal?
YES- GO TO 4.
NO- Repair harness or connector.

4. CHECK INTAKE DOOR MOTOR PBR FEEDBACK SIGNAL CIRCUIT FOR OPEN

Check continuity between intake door motor harness connector and A/C auto amp. harness connector.





Is the inspection result normal?
YES- GO TO 5.
NO- Repair harness or connector.

5. CHECK INTAKE DOOR MOTOR PBR FEEDBACK SIGNAL CIRCUIT FOR SHORT

Check continuity between intake door motor harness connector and ground.





Is the inspection result normal?
YES- GO TO 6.
NO- Repair harness or connector.

6. CHECK INTAKE DOOR MOTOR PBR

Check intake door motor PBR. Refer to "Component Inspection (PBR)" .
Is the inspection result normal?
YES- Replace A/C control (A/C auto amp.). Refer to "Removal and Installation" Service and Repair.
NO- Replace intake door motor. Refer to "INTAKE DOOR MOTOR : Removal and Installation" Intake Door Motor.

7. CHECK INTAKE DOOR MOTOR PBR POWER SUPPLY CIRCUIT FOR OPEN

1.Turn power switch OFF.
2.Disconnect A/C auto amp. connector.
3.Check continuity between intake door motor harness connector and A/C auto amp. harness connector.





Is the inspection result normal?
YES- Replace A/C control (A/C auto amp.). Refer to "Removal and Installation" Service and Repair.
NO- Repair harness or connector.

8. CHECK INTAKE DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR OPEN

1.Turn power switch OFF.
2.Disconnect intake door motor connector, and A/C auto amp. connector.
3.Check continuity between intake door motor harness connector and A/C auto amp. harness connector.





Is the inspection result normal?
YES- GO TO 9.
NO- Repair harness or connector.

9. CHECK INTAKE DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR SHORT

Check continuity between intake door motor harness connector and ground.





Is the inspection result normal?
YES- GO TO 10.
NO- Repair harness or connector.

10. CHECK INTAKE DOOR MOTOR

1.Turn power switch OFF.
2.Check intake door motor. Refer to "Component Inspection (Motor)" .
Is the inspection result normal?
YES- GO TO 11.
NO- Replace intake door motor. Refer to "INTAKE DOOR MOTOR : Removal and Installation" Intake Door Motor.

11. CHECK INSTALLATION OF INTAKE DOOR MOTOR SYSTEM

Check intake door motor system is properly installed. Refer to "Exploded View" Door Motor.
Is the inspection result normal?
YES- Replace A/C control (A/C auto amp.). Refer to "Removal and Installation" Service and Repair.
NO- Repair or replace malfunctioning parts.


Component Inspection (PBR)


1. CHECK INTAKE DOOR MOTOR PBR

Check resistance between intake door motor terminals.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace intake door motor. Refer to "INTAKE DOOR MOTOR : Removal and Installation" Intake Door Motor.


Component Inspection (Motor)


1. CHECK INTAKE DOOR MOTOR

Supply intake door motor terminals with battery voltage and check by visually and operation sound that intake door motor operates.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace intake door motor. Refer to "INTAKE DOOR MOTOR : Removal and Installation" Intake Door Motor.