B2756

B2756, B2757, B2758 MODE 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. (With Forest
Air).
- If All of door motors DTC (B2750 � B2764) are detected, check door motor PBR power supply and ground circuit. (Without
Forest Air).






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 MODE DOOR MOTOR (DRIVER SIDE) OPERATION
1. Turn ignition switch ON.
2. Operate MODE switch (driver side) and check by operation sound that mode door motor (driver side) operates.
Is the inspection result normal?
YES - GO TO 8.
NO - GO TO 2.
2.CHECK MODE DOOR MOTOR (DRIVER SIDE) DRIVE SIGNAL
1. Press MODE switch (driver side) and DEF switch.
2. Check voltage between mode door motor LH harness connector and ground.





Is the inspection result normal?
YES - GO TO 6.
NO - GO TO 3.
3.CHECK MODE DOOR MOTOR (DRIVER SIDE) DRIVE SIGNAL CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect mode door motor LH harness connector and A/C auto amp. harness connector.
3. Check continuity between mode 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 MODE DOOR MOTOR (DRIVER SIDE) DRIVE SIGNAL CIRCUIT FOR GROUND SHORT
Check continuity between mode door motor LH harness connector and ground.





Is the inspection result normal?
YES - GO TO 5.
NO - Repair harness or connector.
5.CHECK MODE DOOR MOTOR (DRIVER SIDE) DRIVE SIGNAL CIRCUIT FOR BATTERY SHORT
1. Turn ignition switch ON.
2. Check voltage between mode door motor LH harness connector and ground.





Is the inspection result normal?
YES - GO TO 15.
NO - Repair harness or connector.
6.CHECK MODE DOOR MOTOR (DRIVER SIDE)
Check mode door motor (driver side). SEE Component Inspection (Motor).
Is the inspection result normal?
YES - GO TO 7.
NO - Replace mode door motor (driver side). Mode Door Motor Removal And Installation.
7.CHECK INSTALLATION OF MODE DOOR MOTOR (DRIVER SIDE) CONTROL LINKAGE
Check mode door motor (driver side) control linkage is properly installed. Door Motor.
Is the inspection result normal?
YES - GO TO 15.
NO - Repair or replace malfunctioning parts.
8.CHECK MODE DOOR MOTOR (DRIVER SIDE) PBR FEEDBACK SIGNAL
1. Operate MODE switch (driver side) and DEF switch.
2. Check voltage between A/C auto amp. harness connector and ground.





Is the inspection result normal?
YES - GO TO 15.
NO - GO TO 9.
9.CHECK MODE DOOR MOTOR (DRIVER SIDE) PBR FEEDBACK SIGNAL CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect mode door motor LH harness connector and A/C auto amp. harness connector.
3. Check continuity between mode 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 MODE DOOR MOTOR (DRIVER SIDE) PBR FEEDBACK SIGNAL CIRCUIT FOR SHORT
Check continuity between mode door motor LH harness connector and ground.





Is the inspection result normal?
YES - GO TO 11.
NO - Repair harness or connector.
11.CHECK MODE DOOR MOTOR (DRIVER SIDE) PBR POWER SUPPLY
1. Reconnect A/C auto amp. harness connector.
2. Turn ignition switch ON.
3. Check voltage between mode door motor LH harness connector and ground.





Is the inspection result normal?
YES - GO TO 13.
NO - GO TO 12.
12.CHECK MODE DOOR MOTOR (DRIVER SIDE) PBR POWER SUPPLY CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. harness connector.
3. Check continuity between mode 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.CHECK MODE DOOR MOTOR (DRIVER SIDE) PBR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. harness connector.
3. Check continuity between mode 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 MODE DOOR MOTOR (DRIVER SIDE) PBR
Check mode door motor (driver side) PBR. SEE Component Inspection (PBR).
Is the inspection result normal?
YES - GO TO 15.
NO - Replace mode door motor (driver side). Mode Door Motor Removal And Installation.
15.CHECK INTERMITTENT INCIDENT
Intermittent Incident.
Is the inspection result normal?
YES - Replace A/C auto amp. Removal And Installation.
NO - Repair or replace malfunctioning parts.




Component Inspection (Motor)
1.CHECK MODE DOOR MOTOR (DRIVER SIDE)
1. Turn ignition switch OFF.
2. Disconnect the mode door motor LH harness connector.
3. Supply mode door motor (driver side) terminals with battery voltage and check by visually and operation sound that mode door motor (driver side) operates.





Is the inspection result normal?
YES - INSPECTION END
NO - Replace mode door motor (driver side). Mode Door Motor Removal And Installation.




Component Inspection (PBR)
1.CHECK MODE DOOR MOTOR (DRIVER SIDE) PBR
Check resistance between mode door motor (driver side) PBR terminals.





Is the inspection result normal?
YES - INSPECTION END
NO - Replace mode door motor (driver side). Air Mix Door Motor Removal And Installation.