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Convertible Top Control Unit Input Test

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2009 Honda S2000, 2008 Honda S2000, 2007 Honda S2000, 2006 Honda S2000, and 2005 Honda S2000. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the passenger's dashboard lower cover (see PASSENGER'S DASHBOARD LOWER COVER REMOVAL/INSTALLATION ).
  2. Disconnect the 14P connector (A) and 10P connector (B) from the convertible top control unit (C).
    Fig 1: Disconnecting 14P Connector And 10P Connector From Convertible Top Control Unit
    G03695123Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. 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 4.
  4. Reconnect the connectors to the control unit, and to these input testa at the following connectors.
    • 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.
    PROBLEM SYMPTOM CHART

    Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained
    B1 Yel Ignition switch On (II) Measure the 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
    A14 BLU/BLK Under all conditions Check for voltage to ground:
    There should be battery voltage.
    • Blown No. 18 (20 A) fuse in the under-dash fuse/relay box
    • An open in the wire
    A13 WHT/RED Under all conditions Check for voltage to ground:
    There should be battery voltage.
    • Blown No. 25 (7.5 A) fuse in the under-dash fuse/relay box
    • An open in the wire
    A7 BLK Under all conditions Check for voltage to ground:
    There should be less than 1 V.
    • Poor ground (G402)
    • An open in the wire
    A8
    A11
    B10 BLK Under all conditions Check for voltage to ground:
    There should be less than 1 V.
    • Poor ground (G501)
    • An open in the wire
    A6 GRY/RED Under all conditions Check for voltage to ground:
    There should be battery voltage.
    • Blown No. 52 (20 A) fuse in the main under-hood fuse/relay box
    • An open in the wire
    A3 GRY Under all conditions Check for voltage to ground:
    There should be battery voltage.
    • Blown No. 55 (20 A) fuse in the main under-hood fuse/relay box
    • An open in the wire
    A12 GRN/WHT Parking brake lever pulled Measure the voltage to ground: There should be less than 1V.
    • Faulty right convertible top motor
    • An open in the wire
    B2 BLU/ORN Ignition switch ON (II), parking brake lever pulled, operate the convertible top switch Measure the voltage between the B2 terminal and body ground : There should be 0-8 V or more repeatedly.
    • Faulty power window master switch
    • An open in the wire
    B6 WHT/BLK Ignition switch ON (II), raise the rear of the vehicle, and rotate one wheel slowly Measure the voltage on the B6 and A8 terminals: There should be 0-5 V or more repeatedly.
    • Faulty gauge assembly
    • Faulty VSS
    • Faulty VSS driving circuit
    • An open in the wire
    Fig 2: Identifying Convertible Top Control Unit Input Test Chart
    G03695124Courtesy of AMERICAN HONDA MOTOR CO., INC.
  5. disconnect the connectors , and do these input tests at the following connectors.
    • 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 CHART

      Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained
      A5 RED/WHT Disconnect the left convertible to motor 2P connector.
      Connect terminals :A5 and A6, and terminals A4 ans A11 momentarily with jumper wires.
      Assist the left side of the top with your hands.      		 Check the right convertible top motor operations: (It should run the top moves opens)
      • Faulty right convertible top motor
      • An open in the wire
      A4 LT/GRN/RED Disconnect the left convertible to motor 2P connector.
      Connect terminals :A4 and A6, and terminals A5 and A11 momentarily with jumper wires.
      Assist the left side of the top with your hands.      		 Check the right convertible top motor operations: (It should run the top moves opens)
      • Faulty right convertible top motor
      • An open in the wire
      A2 RED/BLU Disconnect the left convertible to motor 2P connector.
      Connect terminals:A2 and A3, and terminals A1 ans A7 momentarily with jumper wires.
      Assist the left side of the top with your hands.      		 Check the right convertible top motor operations: (It should run the top moves opens)
      • Faulty left convertible top motor
      • An open in the wire
      A1 RED Disconnect the left convertible to motor 2P connector.
      Connect terminals:A1 and A3, and terminals A2 and A7 momentarily with jumper wires.
      Assist the left side of the top with your hands.      		 Check for voltage to ground:
      There should be battery voltage.
      • Faulty left convertible top motor
      • An open in the wire
      B5* LT/GRN Convertible top disable switch closed. Check for community to ground: There should be continuity
      • Faulty convertible top disable switch
      • Poor ground top disable switch
      • An open in the wire
      B3 RED/BLU Connect the B3 terminal to the A14 terminal and B4 terminal to the B10 terminal Check the passenger's power window motor operation:
      It should run ( the window moves up)
      • Faulty passenger"s power window motor
      • An open in the wire
      B4 RED Connect the B3 terminal to the A14 terminal and B3 terminal to the B10 terminal Check the passenger's power window motor operation:
      It should run ( the window moves up)
      • Faulty passenger's power window motor
      • An open in the wire
      A9 RED/BLK Ignition switch ON (II), convertible top switch OPEN Measure the voltage to ground : There should be battery voltage
      • Blown No. 12(15A) fuse in the under-dash fuse/relay box
      • Faulty convertibletop switch
      • An open in the wire
      A10 RED/YEL Ignition switch ON (II), convertible top switch CLOSE Measure the voltage to ground : There should be battery voltage
      • Blown No. 12(15A) fuse in the under-dash fuse/relay box
      • Faulty convertible top switch
      • An open in the wire
      B7 BLU/WHT Ignition switch ON (II), power window master switch main switch ON , passenger's window switch DOWN Measure the voltage to ground : There should be battery voltage
      • Blown No. 8 (20A) fuse in the under-dash fuse/relay box
      • Faulty power window master switch.
      • Faulty passenger's power window switch
      • An open in the wire
      B8 BLU/RED Ignition switch ON (II), power window master switch main switch ON , passenger's window switch UP. Measure the voltage to ground : There should be battery voltage
      • Blown No. 8 (20A) fuse in the under-dash fuse/relay box
      • Faulty power window master switch.
      • Faulty passenger's power window switch
      • An open in the wire
      B9 RED/BLU Ignition switch ON (II), power window master switch main switch ON Measure the voltage to ground : There should be battery voltage
      • Blown No. 8 (20A) fuse in the under-dash fuse/relay box
      • Faulty power window master switch.
      • Faulty passenger's power window switch
      • An open in the wire
      * : With Hardtop
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