Upper Ventilator Door Motor (Driver Side)
B275F, B2760, B2761 UPPER VENTILATOR DOOR MOTOR (DRIVER SIDE)
DTC Logic
DTC DETECTION LOGIC
NOTE:
- If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. HAC-
94, "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".
- If All of door motors DTC (B2750 � B276A) are detected, check door motor PBR power supply and ground circuit. .
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Turn ignition switch ON.
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 UPPER VENTILATOR DOOR MOTOR (DRIVER SIDE) OPERATION
1. Turn ignition switch ON.
2. Touch "Upper Vent" in "Climate" screen and check by operation sound that upper ventilator door motor
(driver side) operates.
Does upper ventilator door motor (driver side) operate?
YES - GO TO 8.
NO - GO TO 2.
2.UPPER VENTILATOR DOOR MOTOR (DRIVER SIDE) DRIVE SIGNAL
Check voltage between upper ventilator door motor LH harness connector and ground when "Upper Vent" in "Climate" screen is touched.
Is the inspection result normal?
YES - GO TO 6.
NO - GO TO 3.
3.CHECK UPPER VENTILATOR DOOR MOTOR LH DRIVE SIGNAL CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
3. Disconnect upper ventilator door motor LH connector.
4. Check continuity between upper ventilator door motor LH 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 UPPER VENTILATOR DOOR MOTOR (DRIVER SIDE) DRIVE SIGNAL CIRCUIT FOR GROUND
SHORT
Check continuity between upper ventilator door motor LH harness connector and ground.
Is the inspection result normal?
YES - GO TO 5.
NO - Repair harness or connector.
5.CHECK UPPER VENTILATOR DOOR MOTOR (DRIVER SIDE) DRIVE SIGNAL CIRCUIT FOR BATTERY
SHORT
1. Turn ignition switch ON.
2. Check voltage between upper ventilator door motor LH harness connector and ground.
Is the inspection result normal?
YES - GO TO 15.
NO - Repair harness or connector.
6.CHECK UPPER VENTILATOR DOOR MOTOR (DRIVER SIDE)
Check upper ventilator door motor (driver side). SEE Component Inspection (Motor).
Is the inspection result normal?
YES - GO TO 7.
NO - Replace upper ventilator door motor (driver side). Upper Ventilator Door Motor.
7.CHECK INSTALLATION OF UPPER VENTILATOR DOOR MOTOR (DRIVER SIDE)
Check upper ventilator door motor (driver side) is properly installed. Door Motor.
Is the inspection result normal?
YES - GO TO 15.
NO - Repair or replace malfunctioning parts.
8.CHECK UPPER VENTILATOR DOOR MOTOR (DRIVER SIDE) PBR FEEDBACK SIGNAL
Check voltage between A/C auto amp. harness connector and ground when "Upper Vent" in "Climate" screen is touched.
Is the inspection result normal?
YES - GO TO 15.
NO - GO TO 9.
9.CHECK UPPER VENTILATOR DOOR MOTOR (DRIVER SIDE) PBR FEEDBACK SIGNAL CIRCUIT FOR
OPEN
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
3. Disconnect upper ventilator door motor LH connector.
4. Check continuity between upper ventilator door motor LH harness connector and A/C auto amp. harness connector.
Is the inspection result normal?
YES - GO TO 10.
NO - Repair harness or connector.
10.CHECK UPPER VENTILATOR DOOR MOTOR (DRIVER SIDE) PBR FEEDBACK SIGNAL CIRCUIT
FOR SHORT
Check continuity between upper ventilator door motor LH harness connector and ground.
Is the inspection result normal?
YES - GO TO 11.
NO - Repair harness or connector.
11. CHECK UPPER VENTILATOR DOOR MOTOR (DRIVER SIDE) PBR POWER SUPPLY
1. Connect A/C auto amp. connector.
2. Turn ignition switch ON.
3. Check voltage between upper ventilator door motor LH harness connector and ground.
Is the inspection result normal?
YES - GO TO 13.
NO - GO TO 12.
12.CHECK UPPER VENTILATOR DOOR MOTOR (DRIVER SIDE) PBR POWER SUPPLY CIRCUIT FOR
OPEN
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
3. Check continuity between upper ventilator door motor LH harness connector and A/C auto amp. harness connector.
Is the inspection result normal?
YES - GO TO 15.
NO - Repair harness or connector.
13.UPPER VENTILATOR DOOR MOTOR (DRIVER SIDE) PBR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
3. Check continuity between upper ventilator door motor LH harness connector and A/C auto amp. harness connector.
Is the inspection result normal?
YES - GO TO 14.
NO - Repair harness or connector.
14.CHECK UPPER VENTILATOR DOOR MOTOR (DRIVER SIDE) PBR
Check upper ventilator door motor (driver side) PBR. SEE Component Inspection (PBR).
Is the inspection result normal?
YES - GO TO 15.
NO - Replace upper ventilator door motor (driver side). Upper Ventilator Door Motor.
15.CHECK INTERMITTENT INCIDENT
Intermittent Incident.
Is the inspection result normal?
YES - Replace A/C auto amp. Removal And Installation.
NO - Repair or replace malfunction parts.
Component Inspection (Motor)
1.CHECK UPPER VENTILATOR DOOR MOTOR (DRIVER SIDE)
1. Turn ignition switch OFF.
2. Disconnect upper ventilator door motor LH. connector.
3. Supply upper ventilator door motor (driver side) terminals with battery voltage and check by visually and operation sound that upper ventilator door motor (driver side) operates.
Is the inspection result normal?
YES - INSPECTION END
NO - Replace upper ventilator door motor (driver side). Upper Ventilator Door Motor.
Component Inspection (PBR)
1.CHECK UPPER VENTILATOR DOOR MOTOR (DRIVER SIDE) PBR
Check resistance between upper ventilator door motor (driver side) terminals.
Is the inspection result normal?
YES - INSPECTION END
NO - Replace upper ventilator door motor (driver side). Upper Ventilator Door Motor.