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Diagnosis Procedure
1.CHECK INTAKE DOOR MOTOR POWER SUPPLY
  1. Change the power supply mode of the electric motor switch to ON (READY indicator: ON).
  2. Check voltage between intake door motor harness connector and A/C amp. harness connector.
+−Voltage
Intake door motorA/C amp.
ConnectorTerminalConnectorTerminal
M1471M54110.5 – 16 V
Is the inspection result normal?
.
.
 
2.CHECK INTAKE DOOR MOTOR GROUND CIRCUIT FOR OPEN
  1. Turn the electric motor switch OFF.
  2. Disconnect intake door motor connector and A/C amp. connector.
  3. Check continuity between intake door motor harness connector and A/C amp. harness connector.
    Intake door motorA/C amp.Continuity
    ConnectorTerminalConnectorTerminal
    M1472M5427Existed
Is the inspection result normal?
.
Repair harness or connector.
 
3.CHECK INTAKE DOOR MOTOR LIN SIGNAL CIRCUIT
  1. Connect intake door motor connector and A/C amp. connector.
  2. Change the power supply mode of the electric motor switch to ON (READY indicator: ON).
  3. Confirm output waveform between intake door motor harness connector and A/C amp. harness connector with oscilloscope.
    +−Output waveform
    Intake door motorA/C amp.
    ConnectorTerminalConnectorTerminal
    M1473M542
Is the inspection result normal?
.
.
 
4.CHECK INSTALLATION OF INTAKE DOOR MOTOR
Check intake door motor is properly installed. Refer to Removal and Installation.
Is the inspection result normal?
Replace intake door motor. Refer to Removal and Installation.
Repair or replace malfunctioning part.
 
5.CHECK INTAKE DOOR MOTOR POWER SUPPLY CIRCUIT FOR OPEN
  1. Turn the electric motor switch OFF.
  2. Disconnect intake door motor connector and A/C amp. connector.
  3. Check continuity between intake door motor harness connector and A/C amp. harness connector.
    Intake door motorA/C amp.Continuity
    ConnectorTerminalConnectorTerminal
    M1471M541Existed
Is the inspection result normal?
Replace A/C amp. Refer to Removal and Installation.
Repair harness or connector.
 
6.CHECK INTAKE DOOR MOTOR LIN SIGNAL CIRCUIT FOR OPEN
  1. Turn the electric motor switch OFF.
  2. Disconnect intake door motor connector and A/C amp. connector.
  3. Check continuity between intake door motor harness connector and A/C amp. harness connector.
    Intake door motorA/C amp.Continuity
    ConnectorTerminalConnectorTerminal
    M1473M542Existed
Is the inspection result normal?
Replace A/C amp. Refer to Removal and Installation.
Repair harness or connector.