B27A8
B27A6, B27A7, B27A8, B27A9 MODE DOOR MOTOR
DTC Logic
DTC DETECTION LOGIC
NOTE:
- If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Climate Control.
- If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010. Control Unit.
- If mode door motors DTC (B27A6 - B27A9) are detected, there is probably a disconnected connector or an open circuit in mode door motor drive power supply harness.
DTC CONFIRMATION PROCEDURE
1. PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1.Turn ignition switch ON.
2.Select "Self Diagnostic Result" mode of "HVAC" using CONSULT.
3.Check DTC.
Is DTC detected?
YES- .
NO- INSPECTION END
Diagnosis Procedure
1. CHECK MODE DOOR MOTOR POWER SUPPLY
1.Turn ignition switch OFF.
2.Disconnect mode door motor connector.
3.Turn ignition switch ON.
4.Check voltage between mode door motor harness connector and ground.
Is the inspection result normal?
YES- GO TO 2.
NO- Repair harness or connector between mode door motor and fuse.
2. CHECK MODE DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR OPEN
1.Turn ignition switch OFF.
2.Disconnect A/C auto amp. connector.
3.Check continuity between mode door motor harness connector and A/C auto amp. harness connector.
Is the inspection result normal?
YES- GO TO 3.
NO- Repair harness or connector.
3. CHECK MODE DOOR MOTOR DRIVE SIGNAL CIRCUIT FOR SHORT
Check continuity between mode 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 MODE DOOR MOTOR
Check mode door motor. .
Is the inspection result normal?
YES- Replace A/C auto amp. Removal And Installation.
NO- Replace mode door motor. Mode Door Motor.
Component Inspection
1. CHECK MODE DOOR MOTOR
1.Remove mode door motor. Mode Door Motor.
2.Check resistance between mode door motor terminals. Refer to applicable table for the normal value.
Is the inspection result normal?
YES- INSPECTION END
NO- Replace mode door motor. Mode Door Motor.