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Diagnosis Procedure
1.CHECK AIR MIX DOOR MOTOR RH POWER SUPPLY
  1. Ignition switch ON.
  2. Check voltage between air mix door motor RH harness connector and A/C amp. harness connector.
+−Voltage
Air mix door motor RHA/C amp.
ConnectorTerminalConnectorTerminal
M1401M555810.5 – 16 V
Is the inspection result normal?
.
.
 
2.CHECK AIR MIX DOOR MOTOR RH GROUND CIRCUIT FOR OPEN
  1. Ignition switch OFF.
  2. Disconnect air mix door motor RH connector and A/C amp. connector.
  3. Check continuity between air mix door motor RH harness connector and A/C amp. harness connector.
    Air mix door motor RHA/C amp.Continuity
    ConnectorTerminalConnectorTerminal
    M1402M5427Existed
Is the inspection result normal?
.
Repair harness or connector.
 
3.CHECK AIR MIX DOOR MOTOR RH LIN SIGNAL CIRCUIT
  1. Connect air mix door motor RH connector and A/C amp. connector.
  2. Ignition switch ON.
  3. Confirm output waveform between air mix door motor RH harness connector and A/C amp. harness connector with oscilloscope.
    +−Output waveform
    Air mix door motor RHA/C amp.
    ConnectorTerminalConnectorTerminal
    M1403M5558
Is the inspection result normal?
.
.
 
4.CHECK INSTALLATION OF AIR MIX DOOR MOTOR RH
Check air mix door motor RH is properly installed. Refer to MODE SELECTION DAMPER CONTROL MOTOR, AIR MIXING DAMPER CONTROL MOTOR AND OUTSIDE/INSIDE AIR SELECTION DAMPER CONTROL MOTOR REMOVAL AND INSTALLATION.
Is the inspection result normal?
Replace air mix door motor RH. Refer to MODE SELECTION DAMPER CONTROL MOTOR, AIR MIXING DAMPER CONTROL MOTOR AND OUTSIDE/INSIDE AIR SELECTION DAMPER CONTROL MOTOR REMOVAL AND INSTALLATION.
Repair or replace malfunctioning part.
 
5.CHECK AIR MIX DOOR MOTOR RH POWER SUPPLY CIRCUIT FOR OPEN
  1. Ignition switch OFF.
  2. Disconnect air mix door motor RH connector and A/C amp. connector.
  3. Check continuity between air mix door motor RH harness connector and A/C amp. harness connector.
    Air mix door motor RHA/C amp.Continuity
    ConnectorTerminalConnectorTerminal
    M1401M541Existed
Is the inspection result normal?
Replace A/C amp. Refer to A/C AMP. REMOVAL AND INSTALLATION.
Repair harness or connector.
 
6.CHECK AIR MIX DOOR MOTOR RH LIN SIGNAL CIRCUIT FOR OPEN
  1. Ignition switch OFF.
  2. Disconnect air mix door motor RH connector and A/C amp. connector.
  3. Check continuity between air mix door motor RH harness connector and A/C amp. harness connector.
    Air mix door motor RHA/C amp.Continuity
    ConnectorTerminalConnectorTerminal
    M1403M542Existed
Is the inspection result normal?
Replace A/C amp. Refer to A/C AMP. REMOVAL AND INSTALLATION.
Repair harness or connector.