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Security Control Unit Input Test

  1. Remove the driver's dashboard lower cover (see DRIVER'S DASHBOARD LOWER COVER REMOVAL/INSTALLATION ).
  2. Disconnect the 20P connector (A) and 16P connector (B) from the control unit (C).
    Fig 1: Disconnecting 20P Connector And 16P Connector From Control Unit
    G03653245Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. Inspect all the connector and socket terminals to be sure they are all making good contact.
    • If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
    • If the terminals look OK, go to step 4.
  4. With the connectors still disconnected, make these input tests at the connector.
    • If any test indicates a problem, find and correct the cause, then recheck the system.
    • If all the input tests prove OK, go to step 5.
      Fig 2: Identifying Connector (A And B)
      G03653246Courtesy of AMERICAN HONDA MOTOR CO., INC.
  5. Reconnect the connectors to the security control unit, and perform the following input tests at the appropriate connector.
    • If any test indicates a problem, find and correct the cause, then recheck the system.
    • If all the input tests prove OK, the security control unit internal circuit must be faulty, replace the control unit.
      CAVITY TEST CONDITION

      Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained
      A20 GRN Driver's door open Check for voltage to ground:
      There should be 1 V or less.
      • Faulty driver's door switch
      • An open in the wire
      • A short to ground
      Driver's door closed Check for voltage to ground:
      There should be 5 V or more.
      A9 LT GRN/RED Passenger's door open Check for voltage to ground:
      There should be 1 V or less.
      • Faulty passenger's door switch
      • An open in the wire
      • A short to ground
      Passenger's door closed Check for voltage to ground:
      There should be 5 V or more.
      A18 GRN/BLK Hood open Check for voltage to ground:
      There should be 1 V or less.
      • Faulty hood switch
      • Poor ground (G302)
      • An open in the wire
      • A short to ground
      Hood closed Check for voltage to ground:
      There should be 5 V or more.
      A7 RED Hatch open Check for voltage to ground:
      There should be 1 V or less.
      NOTE: Remove the No. 3 (7.5 A) fuse from the under-hood fuse/relay box.
      • Faulty hatch latch switch
      • Poor ground (G701)
      • An open in the wire
      • A short to ground
      Hatch closed Check for voltage to ground:
      There should be 5 V or more.
      NOTE: Remove the No. 3 (7.5 A) fuse from the under-hood fuse/relay box.
      A1 WHT/BLK Driver's door lock knob unlocked Check for voltage to ground:
      There should be 1 V or less.
      • Faulty driver's door lock knob switch
      • Poor ground (G401)
      • An open in the wire
      • A short to ground
      Driver's door lock knob locked Check for voltage to ground:
      There should be 5 V or more.
      A12 BRN/WHT
      NOTE: First lock both doors with the driver's door lock switch. Passenger's door lock knob unlocked
      		 Check for voltage to ground:
      There should be 1 V or less.
      • Faulty passenger's door lock knob switch
      • Poor ground (G402)
      • An open in the wire
      • A short to ground
      Passenger's door lock knob locked Check for voltage to ground:
      There should be 5 V or more.
      A4 WHT/RED Driver's door key cylinder locked Check for voltage to ground:
      There should be 1 V or less.
      • Faulty driver's door key cylinder switch
      • Poor ground (G401)
      • An open in the wire
      • A short to ground
      Driver's door key cylinder in neutral/unlocked Check for voltage to ground:
      There should be 5 V or more.
      A3 WHT Driver's door key cylinder unlocked Check for voltage to ground:
      There should be 1 V or less.
      • Faulty driver's door key cylinder switch
      • Poor ground (G401)
      • An open in the wire
      • A short to ground
      Driver's door key cylinder in neutral/locked Check for voltage to ground:
      There should be 5 V or more.
      A15 PNK Passenger's door key cylinder locked Check for voltage to ground:
      There should be 1 V or less.
      • Faulty passenger's door key cylinder switch
      • Poor ground (G402)
      • An open in the wire
      • A short to ground
      Passenger's door key cylinder in neutral/unlocked Check for voltage to ground:
      There should be 5 V or more.
      A14 PNK/BLU Passenger's door key cylinder unlocked Check for voltage to ground:
      There should be 1 V or less.
      Passenger's door key cylinder in neutral/locked Check for voltage to ground:
      There should be 5 V or more.
      A8 RED/WHT Ignition key is in the ignition switch Check for voltage to ground:
      There should be 1 V or less.
      • Poor ground (G401)
      • An open in the wire
      • A short to ground
      Ignition key is out of the ignition switch Check for voltage to ground:
      There should be 5 V or more.
      A2 BLU/YEL Doors and hatch are locked Check for voltage to ground:
      There should be 1 V or less.
      • Faulty security hatch lock knob switch
      • Poor ground (G701)
      • An open in the wire
      • A short to ground
      Doors and hatch are unlocked Check for voltage to ground:
      There should be 5 V or more.
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