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Keyless Door Lock Control Unit Input Test

  1. Disconnect the 18P connector from the keyless door lock control unit.
    Fig 1: Disconnecting 18P Connector From Keyless Door Lock Control Unit
    G03695107Courtesy of AMERICAN HONDA MOTOR CO., INC.
  2. Inspect 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  3.
  3. Reconnect the connector to the control unit, and perform the following input tests at the keyless door lock control unit 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  4.
      PROBLEM SYMPTOM TABLE (1 Of 2)

      Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained
      17 BLK Under all conditions Check for continuity to ground:
      There should be less than 1 V.
      • Poor ground (G501)
      • An open in the wire
      5 BLK/YEL Under all conditions Check for voltage to ground:
      There should be less than 1 V.
      • Faulty trunk lid opener solenoid
      • Poor ground (G601)
      • An open in the wire
      8 WHT Under all conditions Check for voltage to ground:
      There should be battery voltage.
      • Blown No. 26(15 A) fuse in the under-dash fuse/relay box
      • An open in the wire
      16 YEL Ignition switch ON (II) Check for voltage to ground:
      There should be battery voltage.
      • Blown No. 5 (7.5 A) fuse in the under-dash fuse/relay box
      • An open in the wire
      4 RED/BLK Lighting switch ON Check for voltage to ground:
      There should be battery voltage.
      • Blown No. 23 (10 A) fuse in the under-dash fuse/relay box
      • Faulty taillight relay
      • An open in the wire
      3 ORN Under all conditions Check for voltage to ground:
      There should be battery voltage.
      • Blown No. 47 (10A)(1) or (15A)(2) fuse in the main under-hood fuse/relay box
      • Faulty horn relay
      • An open in the wire
      14 BLK/WHT Driver's or passenger's door opened Check for voltage to ground:
      There should be 1 V or less.
      • Faulty door switch
      • Faulty gauge assembly
      • An open in the wire
      2 GRIM/YEL All doors closed and ceiling/spotlight switch position "MIDDLE" Check for voltage to ground:
      There should be battery voltage.
      • Blown No. 24 (7.5 A) fuse in the under-dash fuse/relay box
      • Blown ceiling/spotlights bulb
      • An open in the wire
      10 YEL/BLK Driver's door lock knob in LOCK Check for voltage to ground:
      There should be less than 1 V.
      • Faulty driver's door lock actuator
      • Faulty gauge assembly
      • Poor ground (G501)
      • An open in the wire
      9 YEL Driver's door lock knob in UNLOCK
      13 RED/WHT Ignition key is in the ignition switch Check for voltage to ground:
      There should be less than 1 V.
      • Faulty gauge assembly
      • Faulty ignition key switch
      • Poor ground (G401)
      • An open in the wire
      • A short to ground in the wire
      Ignition key removed from the ignition switch Check for voltage to ground:
      There should be 5 V or more.
      15 WHT Driver's key cylinder switch position "UNLOCK" Check for voltage to ground:
      There should be less than 1 V.
      • Faulty driver's key cylinder switch
      • Poor ground (G501)
      • An open in the wire
      • A short to ground in the wire
      Driver's key cylinder switch position "LOCK" or Neutral Check for voltage to ground:
      There should be 5 V or more.
      (1) '00-01 models
      (2) '02-09 models
  4. Disconnect the 18P connector from the control unit, then 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, the control unit must be faulty; replace it.
      PROBLEM SYMPTOM TABLE (2 Of 2)

      Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained
      7 YEL/GRN Connect the No. 7 terminal to the No. 8 terminal, and the No. 6 terminal to the No. 17 terminal momentarily Check door lock operation:
      The driver's door should unlock.
      • Faulty door lock actuator
      • Blown No. 26 (15 A) fuse in the under-dash fuse/relay box
      • Poor ground (G501)
      • An open in the wire
      18 PNK/BLU Connect the No. 18 terminal to the No. 8 terminal, and the No. 6 terminal to the No. 17 terminal momentarily Check door lock operation:
      The passenger's door should unlock.
      6 PNK/BLK Connect the No. 6 terminal to the No. 8 terminal, and the No. 7 and No. 18 terminals to the No. 17 terminal momentarily Check door lock operation:
      Both doors should lock.
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