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. HAC-
50, "DTC Logic".
- If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010. Control Unit Control Unit Control Unit, "DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Start engine.
2. Select "Self Diagnostic Result" mode of "HVAC" using CONSULT-III.
3. Check DTC.
Is DTC detected?
YES - SEE Diagnosis Procedure.
NO - INSPECTION END
Diagnosis Procedure
1.CHECK INTAKE DOOR MOTOR OPERATION
1. Turn ignition 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 ignition 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 ignition 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. SEE Component Inspection (PBR).
Is the inspection result normal?
YES - Replace A/C auto amp. Automatic Air Conditioner.
NO - Replace intake door motor. Intake Door Motor Removal And Installation.
7.CHECK INTAKE DOOR MOTOR PBR POWER SUPPLY CIRCUIT FOR OPEN
1. Turn ignition 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 auto amp. Automatic Air Conditioner.
NO - Repair harness or connector.
8.CHECK INTAKE DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR OPEN
1. Turn ignition 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 ignition switch OFF.
2. Check intake door motor. SEE Component Inspection (Motor).
Is the inspection result normal?
YES - GO TO 11.
NO - Replace intake door motor. Intake Door Motor Removal And Installation.
11.CHECK INSTALLATION OF INTAKE DOOR MOTOR SYSTEM
Check intake door motor system is properly installed. Door Motor.
Is the inspection result normal?
YES - Replace A/C auto amp. Automatic Air Conditioner.
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. Intake Door Motor Removal And Installation.
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. Intake Door Motor Removal And Installation.