Without 7 Inch Display

B2632, B2633 AIR MIX DOOR MOTOR PBR

Description


AIR MIX DOOR MOTOR






- The air mix door motor (1) is installed to the heater & cooling unit assembly.
- The LCU (Local Control Unit) is installed to each door motor so as to perform the multiplex communication control (LAN) between each door motor of the mode door motor, air mix door motor and intake door motor in one communication line.
- When each LCU receives the control signal (combination of the pulse wave with two types of amplitude) from the A/C auto amp., it moves each door to the appropriate position based on the door position detection signal of each PBR (Potentio Balance Resistor).
When the movement was completed, each LCU transmits the signal that reports the movement completion to the A/C auto amp.


DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PERFORM SELF-DIAGNOSIS

With CONSULT
1.Perform the "SELF-DIAGNOSIS".
2.Check if any DTC is detected in the self-diagnostic results.
NOTE:
- If DTC is displayed along with DTC "U1000" or "U1010", first diagnose the DTC "U1000" or "U1010". Refer to
Without 7 Inch Display or Without 7 Inch Display.
- If all of door motors DTC (B2632 - B2655) are detected, check door motor communication circuit. Refer to
Without 7 Inch Display.
Is DTC "B2632" or "B2633" displayed?
YES- Perform the diagnosis of air mix door motor system. .
NO- GO TO 2.

2. FUNCTION INSPECTION

1.Turn temperature dial and raise temperature setting to 32.0�C (90�F) after warming up the engine.
2.Check that warm air blows from outlets.
3.Operate the compressor.
4.Operate the temperature control dial and lower the set temperature to 18.0�C (60�F).
5.Check that the cool air blows from the outlets.
Does it operate normally?
YES- INSPECTION END
NO- Check the air mix door motor system installation condition. Repair or replace the malfunctioning parts.


Diagnosis Procedure


1. CHECK BATTERY VOLTAGE OF AIR MIX DOOR MOTOR

1.Turn the ignition switch ON.
2.Check voltage between the air mix door motor harness connector and ground.





Is the inspection result normal?
YES- GO TO 2.
NO- Repair the harnesses or connectors.

2. CHECK SIGNAL OF AIR MIX DOOR MOTOR

Check output waveform between the air mix door motor harness connector and ground with the oscilloscope.





Is the inspection result normal?
YES- GO TO 3.
NO- Repair the harnesses or connectors.

3. CHECK GROUND CIRCUIT OF AIR MIX DOOR MOTOR

1.Turn the ignition switch OFF.
2.Disconnect the air mix door motor connector.
3.Check for continuity between the air mix door motor harness connector and ground.





Is the inspection result normal?
YES- Replace the air mix door motor.
NO- Repair the harnesses or connectors.