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Diagnosis Procedure
1.CHECK KEYLESS OPERATION FRONT OUTER ANTENNA INPUT SIGNAL 1
  1. Turn the power supply mode of the electric motor switch to ON.
  2. Check signal between keyless operation key unit harness connector and ground using oscilloscope.
    (+)(–)ConditionSignal
    (Reference value)
    Keyless operation key unit
    ConnectorTerminal
    M18431GroundWhen the door request switch (front door RH) is operated with electric motor switch ONWhen keyless operation key is in the antenna detection area
    When keyless operation key is not in the antenna detection area
    32When keyless operation key is in the antenna detection area
    When keyless operation key is not in the antenna detection area
Is the inspection result normal?
Replace keyless operation key unit. Refer to REMOVAL AND INSTALLATION.
.
 
2.CHECK KEYLESS OPERATION FRONT OUTER ANTENNA CIRCUIT
  1. Turn the power supply mode of the electric motor switch to OFF.
  2. Disconnect keyless operation key unit connector and keyless operation front outer antenna (rear door RH) connector.
  3. Check continuity between keyless operation key unit harness connector and keyless operation front outer antenna (rear door RH) connector.
    Keyless operation key unitKeyless operation front outer antenna (rear door RH)Continuity
    ConnectorTerminalConnectorTerminal
    M18431D3082Existed
    321
  4. Check continuity between keyless operation key unit harness connector and ground.
    Keyless operation key unit—Continuity
    ConnectorTerminal
    M18431GroundNot existed
    32
Is the inspection result normal?
.
Repair or replace harness.
 
3.CHECK KEYLESS OPERATION FRONT OUTER ANTENNA INPUT SIGNAL 2
  1. Replace keyless operation front outer antenna (rear door RH). (New antenna or other antenna)
  2. Connect keyless operation key unit connector and keyless operation front outer antenna (rear door RH) connector.
  3. Turn the power supply mode of the electric motor switch to  ON.
  4. Check signal between keyless operation key unit harness connector and ground using oscilloscope.
    (+)(–)ConditionSignal
    (Reference value)
    Keyless operation key unit
    ConnectorTerminal
    M18431GroundWhen the door request switch (front door RH) is operated with electric motor switch ONWhen keyless operation key is in the antenna detection area
    When keyless operation key is not in the antenna detection area
    32When keyless operation key is in the antenna detection area
    When keyless operation key is not in the antenna detection area
Is the inspection result normal?
Replace keyless operation front outer antenna (rear door RH). Refer to REMOVAL AND INSTALLATION.
Replace keyless operation key unit. Refer to REMOVAL AND INSTALLATION.