B2632
B2632, B2633 AIR MIX DOOR MOTOR PBR (DRIVER SIDE)
Description
COMPONENT DESCRIPTION
Arrow Indicates : Vehicle front
The air mix door motor (driver side) (1) is attached to the heater &
cooling unit assembly. It rotates so that the air mix door is opened or closed to a position set by the auto amp. Motor rotation is then conveyed through a shaft and the air mix door position feedback is then sent to the auto amp. by Position Balanced Resistor (PBR) built-in air mix door motor.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.
- GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON and wait at least 50 seconds.
2. Check DTC.
Is DTC detected?
YES - Go to Diagnosis Procedure. SEE Diagnosis Procedure.
NO - Inspection End.
Diagnosis Procedure
Regarding Wiring Diagram information, [1][2]Electrical Diagrams.
1.CHECK AIR MIX DOOR MOTOR (DRIVER SIDE)
Check air mix door (driver side) and air mix door motor (driver side) for obstruction or mechanical failure. Service and Repair.
Is the inspection result normal?
YES - GO TO 2.
NO - Repair or replace air mix door (driver side) or air mix door motor (driver side) as necessary. Service and Repair.
2.CHECK POWER SUPPLY FOR AUTO AMP.
1. Turn ignition switch ON.
2. Check voltage between auto amp. harness connector M37 terminal 20 and ground.
Is the inspection result normal?
YES - GO TO 3.
NO - GO TO 7.
3.CHECK SIGNAL FOR AUTO AMP.
Confirm A/C LAN signal between auto amp. harness connector M37 terminal 3 and ground using an oscilloscope.
Is the inspection result normal?
YES - GO TO 4.
NO - GO TO 11.
4.CHECK POWER SUPPLY FOR AIR MIX DOOR MOTOR (DRIVER SIDE)
1. Turn ignition switch OFF.
2. Disconnect air mix door motor (driver side) connector.
3. Turn ignition switch ON.
4. Check voltage between air mix door motor (driver side) harness connector M128 terminal 3 and ground.
Is the inspection result normal?
YES - GO TO 5.
NO - Repair harness or connector.
5.CHECK SIGNAL FOR AIR MIX DOOR MOTOR (DRIVER SIDE)
Confirm A/C LAN signal between air mix door motor (driver side) harness connector M128 terminal 1 and ground using an oscilloscope.
Is the inspection result normal?
YES - GO TO 6.
NO - Repair harness or connector.
6.CHECK AIR MIX DOOR MOTOR (DRIVER SIDE) GROUND CIRCUIT
Check continuity between air mix door motor (driver side) harness connector M128 terminal 2 and ground.
Is the inspection result normal?
YES - Replace air mix door motor (driver side). Service and Repair.
NO - Repair harness or connector.
7.CHECK AIR MIX DOOR MOTOR (DRIVER SIDE) FOR SHORT TO GROUND
While checking for voltage between auto amp. connector M37 terminal 20 and ground, disconnect the air mix door (driver side) motor.
Is the inspection result normal?
YES - Replace air mix door motor (driver side). Service and Repair.
NO - GO TO 8.
8.CHECK MODE DOOR MOTOR FOR SHORT TO GROUND
While checking for voltage between auto amp. connector M37 terminal 20 and ground, disconnect the mode door motor.
Is the inspection result normal?
YES - Replace mode door motor. Mode Door Motor.
NO - GO TO 9.
9.CHECK INTAKE DOOR MOTOR FOR SHORT TO GROUND
While checking for voltage between auto amp. connector M37 terminal 20 and ground, disconnect the intake door motor.
Is the inspection result normal?
YES - Replace intake door motor. Intake Door Motor.
NO - GO TO 10.
10.CHECK AIR MIX DOOR (PASSENGER SIDE) MOTOR FOR SHORT TO GROUND
While checking for voltage between auto amp. connector M37 terminal 20 and ground, disconnect the air mix door motor (passenger side).
Is the inspection result normal?
YES - Replace air mix door motor (passenger side). Service and Repair.
NO - GO TO 15.
11.CHECK AIR MIX DOOR MOTOR (DRIVER SIDE) FOR SHORT TO GROUND
While using an oscilloscope to check the A/C LAN signal between auto amp. harness connector M37 terminal
3 and ground, disconnect the air mix door (driver side) motor.
Is the inspection result normal?
YES - Replace air mix door motor (driver side). Service and Repair.
NO - GO TO 12.
12.CHECK MODE DOOR MOTOR FOR SHORT TO GROUND
While using an oscilloscope to check the A/C LAN signal between auto amp. harness connector M37 terminal
3 and ground, disconnect the mode door motor.
Is the inspection result normal?
YES - Replace mode door motor. Mode Door Motor.
NO - GO TO 13.
13.CHECK INTAKE DOOR MOTOR FOR SHORT TO GROUND
While using an oscilloscope to check the A/C LAN signal between auto amp. harness connector M37 terminal
3 and ground, disconnect the intake door motor.
Is the inspection result normal?
YES - Replace intake door motor. Intake Door Motor.
NO - GO TO 14.
14.CHECK AIR MIX DOOR (PASSENGER SIDE) MOTOR FOR SHORT TO GROUND
While using an oscilloscope to check the A/C LAN signal between auto amp. harness connector M37 terminal
3 and ground, disconnect the air mix door (passenger side) motor.
Is the inspection result normal?
YES - Replace air mix door motor (passenger side). Service and Repair.
NO - GO TO 16.
15.CHECK DOOR MOTOR POWER SUPPLY FOR SHORT TO GROUND
1. Disconnect auto amp. connector M37.
2. Check for continuity between auto amp. connector M37 terminal 20 and ground.
Is the inspection result normal?
YES - Replace auto amp. Service and Repair.
NO - Repair harness or connector.
16.CHECK A/C LAN SIGNAL FOR SHORT TO GROUND
1. Disconnect auto amp. connector M37.
2. Check for continuity between auto amp. connector M37 terminal 3 and ground.
Is the inspection result normal?
YES - Replace auto amp. Service and Repair.
NO - Repair harness or connector.