With 7 Inch Display

B2636, B2637, B2638, B2639, B2654, B2655 MODE DOOR MOTOR

Description


MODE DOOR MOTOR






- The mode 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 type 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

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
With 7 Inch Display or With 7 Inch Display.
- If all of door motors DTC (B2632 - B2655) are detected, check door motor communication circuit. Refer to
With 7 Inch Display.
Is DTC " B2636 ", " B2637 ", "B2638 ", "B2639 ", "B2654 " or "B2655 " displayed?
YES- Perform the diagnosis of mode door motor system. .
NO- GO TO 2.

2. FUNCTION INSPECTION

1.Turn mode control dial to each position.
2.Check that the air outlets change according to each indicated air outlet by placing a hand in front of the outlets. Description and Operation.
Does it operate normally?
YES- INSPECTION END
NO- Check the mode door system installation condition. Repair or replace the malfunctioning parts.


Diagnosis Procedure


1. CHECK MODE DOOR MOTOR POWER SUPPLY CIRCUIT

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





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

2. CHECK MODE DOOR MOTOR SIGNAL

Check output waveform between the mode 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 MODE DOOR MOTOR GROUND CIRCUIT

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





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