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Diagnosis Procedure
1.CHECK BCM OUTPUT SIGNAL
  1. Ignition switch ON.
  2. Check signal between BCM harness connector and ground using an oscilloscope.
    (+)(−)Signal
    BCM
    ConnectorTerminal
    M1824Ground
Is the inspection result normal?
.
.
 
2.CHECK LIN COMMUNICATION CIRCUIT
  1. Ignition switch OFF, and then wait for 3 minutes with driver door open.
    note
    • Even after ignition switch OFF, power is supplied to accessories for a certain amount of time by the AUTO ACC function.
    • When vehicle is operated while on standby, power may be supplied to accessories.
  2. Disconnect following connectors.
    • BCM
    • Power window main switch
    • Front power window motor (driver side)
    • Passenger door mirror control module
    • Sunroof motor assembly
    • Sunshade motor assembly
    Connecting parts other than power window.
  3. Check continuity between BCM harness connector and ground.
    BCM—Continuity
    ConnectorTerminal
    M1824GroundNot existed
Is the inspection result normal?
Replace BCM. Refer to Removal and Installation.
Repair or replace harness.
 
3.CHECK LIN COMMUNICATION SIGNAL
  1. Ignition switch OFF, and then wait for 3 minutes with driver door open.
    note
    • Even after ignition switch OFF, power is supplied to accessories for a certain amount of time by the AUTO ACC function.
    • When vehicle is operated while on standby, power may be supplied to accessories.
  2. Disconnect following connectors.
    • Power window main switch
    • Front power window motor (driver side)
  3. Ignition switch ON.
  4. Check signal between power window main switch harness connector, front power window motor (driver side) harness connector and ground using an oscilloscope.
    (+)(−)Signal
    ConnectorTerminal
    Power window main switchD6*1
    D27*2
    		4Ground
    Front power window motor (driver side)D106
    *1: With automatic drive positioner
    *2: Without automatic drive positioner
Is the inspection result normal?
INSPECTION END
-1Power window main switch: .
-2Front power window motor (driver side): .
 
4.CHECK LIN COMMUNICATION CIRCUIT (POWER WINDOW MAIN SWITCH)
  1. Ignition switch OFF.
  2. Disconnect BCM connector.
  3. Check continuity between BCM harness connector and power window main switch harness connector.
    BCMPower window main switchContinuity
    ConnectorTerminalConnectorTerminal
    M1824D6*1
    D27*2
    		4Existed
    *1: With automatic drive positioner
    *2: Without automatic drive positioner
Is the inspection result normal?
INSPECTION END
Repair or replace harness.
 
5.CHECK LIN COMMUNICATION CIRCUIT [FRONT POWER WINDOW MOTOR (DRIVER SIDE)]
  1. Ignition switch OFF.
  2. Disconnect BCM connector.
  3. Check continuity between BCM harness connector and front power window motor (driver side) harness connector.
    BCMFront power window motor (driver side)Continuity
    ConnectorTerminalConnectorTerminal
    M1824D106Existed
Is the inspection result normal?
INSPECTION END
Repair or replace harness.