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Gauge Control Module

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  1. Turn the ignition switch OFF.
  2. Remove the gauge control module and disconnect the 36P connector from it (see REWRITING THE ODO DATA AND TRANSFERRING MAINTENANCE MINDER ON A NEW GAUGE CONTROL MODULE ).
    Fig 1: Identifying Gauge Control Module 36P Connector Terminals
    G05451417Courtesy 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 are OK, go to step  4.
  4. With the connector 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.
      REFERENCE TABLE

      Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
      27 WHT/GRN Disconnect under-dash fuse/relay box connector K (17P) Check for continuity between the No. 27 terminal and under-dash fuse/relay box connector K (17P) No. 10 terminal: There should be continuity. An open in the wire
      Check for continuity to ground: There should be no continuity. Short to ground in the wire
      28 RED Jump the SCS line with the HDS, disconnect ECM/PCM connector E (31P) Check for continuity between the No. 28 terminal and ECM/PCM connector E (31P) No. 24 terminal: There should be continuity. An open in the wire
      Check for continuity to ground: There should be no continuity. Short to ground in the wire
      29 WHT Jump the SCS line with the HDS, disconnect ECM/PCM connector E (31P) Check for continuity between the No. 29 terminal and ECM/PCM connector E (31P) No. 11 terminal: There should be continuity. An open in the wire
      Check for continuity to ground: There should be no continuity. Short to ground in the wire
  5. Reconnect the connector to the gauge control module, and 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  6.
      REFERENCE TABLE

      Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
      18 BLK Under all conditions Measure voltage to ground: There should be less than 0.5 V.
      • Poor ground (G502)
      • An open in the wire
      36 BLK Under all conditions Measure voltage to ground: There should be less than 0.5 V.
      • Poor ground (G502)
      • An open in the wire
      2 YEL Ignition switch ON (II) Measure voltage to ground: There should be battery voltage.
      • Blown No. 10 (7.5 A) fuse in the under-dash fuse/relay box
      • An open in the wire
      3 WHT/RED Under all conditions Measure voltage to ground: There should be battery voltage.
      • Blown No. 9(10 A) fuse in the under-hood fuse/relay box
      • An open in the wire
      5 GRN Ignition switch ON (II), brake fluid is full level in the reservoir Measure voltage to ground: There should be 10 V or more.
      • Faulty brake fluid level switch
      • A short to ground in the wire
      Ignition switch ON (II), brake fluid is lower level in the reservoir Measure voltage to ground: There should be less than 0.5 V.
      • Poor ground (G401)
      • Faulty brake fluid level switch
      • An open in the wire
      25 YEL/RED Engine OFF, ignition switch ON (II) Measure voltage to ground: There should be less than 0.5 V.
      • Faulty oil pressure switch
      • An open in the wire
      Engine running Measure voltage to ground: There should be battery voltage.
      • Faulty oil pressure switch
      • A short to ground in the wire
      • Mechanical problem in the engine
  6. Turn the ignition switch OFF.

    Multiplex Control Unit 

    NOTE: Before testing, troubleshoot the multiplex control system (see TROUBLESHOOTING ).
  7. Remove the driver's dashboard lower cover (see DRIVER'S DASHBOARD LOWER COVER REMOVAL/INSTALLATION ).
  8. Disconnect the under-dash fuse/relay box connectors F, J, Q and X.
    NOTE: All connectors are shown from wire side of female terminals.
    Fig 2: Identifying Under-Dash Fuse/Relay Box Connectors
    G00485560Courtesy of AMERICAN HONDA MOTOR CO., INC.
  9. 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  10.
  10. With the connector 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  11.
      REFERENCE TABLE

      Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
      FT(1) * F8(1) GRN/ORN Under all conditions Check for continuity between the F1 and F8 terminals: There should be continuity. An open in the wire
      Check for continuity between the F1 or F8 terminals to ground: There should be no continuity. Short to ground in the wire
      F8(2) GRN/RED Disconnect the daytime running lights control unit 14P connector Check for continuity between the F8 terminal and daytime running lights control unit 14P connector No. 13 terminal: There should be continuity. An open in the wire
      Check for continuity to ground: There should be no continuity. Short to ground in the wire
      F1(2) GRN/ORN Disconnect the daytime running lights control unit 14P connector Check for continuity between the F1 terminal and daytime running lights control unit 14P connector No. 6 terminal: There should be continuity. An open in the wire
      Check for continuity to ground: There should be no continuity. Short to ground in the wire
      (1) '07-08 USA models
      (2) '07-08 Canada models and '09 model
  11. Reconnect the connectors to the under-dash fuse/relay box, and make these input tests at the appropriate connectors on the under-dash fuse/relay box.
    • If any test indicates a problem, find and correct the cause, then recheck the system.
    • If all the input tests prove OK, the multiplex control unit must be faulty, replace the under-dash fuse/relay box assembly.
      REFERENCE TABLE

      Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
      J4 BLK Under all conditions Measure voltage to ground: There should be less than 0.5 V.
      • Poor ground (G401)
      • An open in the wire
      Q3 GRN Driver's or left rear door open Measure voltage to ground: There should be less than 0.5 V.
      • Faulty driver's or left rear door switch
      • An open in the wire
      Driver's and left rear door closed Measure voltage to ground: There should be battery voltage.
      • Faulty driver's or left rear door switch
      • Short to ground in the wire
      Q8 GRN/ORN Parking brake lever pulled Measure voltage to ground: There should be less than 0.5 V.
      • Faulty parking brake switch
      • An open in the wire
      Parking brake lever released Measure voltage to ground: There should be battery voltage.
      • Faulty parking brake switch
      • Short to ground in the wire
      • An open in the wire
      Q5 BLU/RED Ignition switch ON (II), driver's seat belt unbuckled. Measure voltage to ground: There should be less than 0.5 V.
      • Faulty driver's seat belt buckle switch
      • Poor ground(G552)
      • An open in the wire
      Ignition switch ON (II), driver's seat belt buckled. Measure voltage to ground: There should be battery voltage.
      • Faulty driver's seat belt buckle switch
      • Short to ground in the wire
      X5 RED/WHT Ignition key is in the ignition switch. Measure voltage to ground: There should be less than 0.5 V.
      • Faulty ignition key switch
      • Poor ground (G401)
      • An open in the wire
      Ignition key is out of the ignition switch. Measure voltage to ground: There should be battery voltage.
      • Faulty ignition key switch
      • Short to ground in the wire
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