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Gauge Control Module Input Test

NOTE: Before testing, do the gauge control module self-diagnostic function, and make sure the B-CAN communication lines are OK.
  1. Turn the ignition switch to LOCK (0).
  2. Remove the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT  ), and disconnect the 32P connector (A) from it.
    Fig 1: Identifying 32P Connector Terminals
    G08089151Courtesy 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 connectors still disconnected, do the following input tests.
    • 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.
      Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
      9 PNK Ignition switch ON (II), turn signal switch in RIGHT Measure the voltage to ground: There should be battery voltage when the lights are flashing.
      • Faulty MICU
      • Faulty combination light switch
      • An open or high resistance in the wire
      10 BLU Ignition switch ON (II), turn signal switch in LEFT Measure the voltage to ground: There should be battery voltage when the lights are flashing.
      • Faulty MICU
      • Faulty combination light switch
      • An open or high resistance in the wire
      1 RED Combination light switch ON Connect a jumper wire to ground: Dashlights should come on full bright.
      • Faulty bulbs
      • Faulty LEDs
      • An open or high resistance in the wire
      2 YEL Combination light switch ON Connect a jumper wire to ground: Dashlights should come on full bright.
      • Faulty LEDs
      • An open or high resistance in the wire
  5. Reconnect the 32P connector to the gauge control module, and do the following input tests.
    • If any test indicates a problem, find and correct the cause, then recheck the system.
    • If the input test proves OK, the gauge control module must be faulty; replace it (see GAUGE CONTROL MODULE REPLACEMENT  ).
      Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
      13 BLK In all ignition switch positions Measure the voltage to ground: There should be less than 0.2 V.
      • Poor ground (G401)
      • An open or high resistance in the ground wire
      17 BLK In all ignition switch positions Measure the voltage to ground: There should be less than 0.2 V.
      • Poor ground(G401)
      • An open or high resistance in the ground wire
      18 BLK In all ignition switch positions Measure the voltage to ground: There should be less than 0.2 V.
      • Poor ground (G401)
      • An open or high resistance in the ground wire
      16 WHT Under all conditions Measure the voltage to ground: There should be battery voltage.
      • Blown No. 23 (10 A) fuse in the under-hood fuse/relay box
      • Faulty under-dash fuse/relay box
      • An open or high resistance in the wire
      32 YEL Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage.
      • Blown No. 10 (7.5 A) fuse in the under-dash fuse/relay box
      • Faulty under-dash fuse/relay box
      • An open or high resistance in the wire
      5(1) BLU Ignition switch ON (II), washer fluid is half or more in the washer reservoir Measure the voltage to ground: There should be at least 5 V.
      • Faulty gauge control module
      • Faulty washer fluid level switch
      • A short to ground in the wire
      Ignition switch ON (II), washer fluid is empty in the washer reservoir Measure the voltage to ground: There should be less than 0.2 V.
      • Faulty washer fluid level switch
      • An open or high resistance in the wire
      • Poor ground (G201) or an open in the ground wire
      21 BLK/YEL Parking brake pedal pressed Measure the voltage to ground: There should be less than 0.2 V.
      • Faulty parking brake switch ground
      • Faulty parking brake switch
      • An open or high resistance in the wire
      Parking brake pedal released Measure the voltage to ground: There should be at least 5 V.
      • Faulty parking brake switch
      • Faulty gauge control module
      • A short to ground in the wire
      22 ORN Ignition switch ON (II), brake fluid is lower than full in the reservoir Measure the voltage to ground: There should be less than 0.2 V.
      • Poor ground (G303) or an open in the ground wire
      • Faulty brake fluid level switch
      • An open or high resistance in the wire
      Ignition switch ON (II), brake fluid is at the full level in the reservoir Measure the voltage to ground: There should be at least 5 V.
      • Faulty brake fluid level switch
      • Faulty gauge control module
      • A short to ground in the wire
      14 PNK Ignition switch ON (II) Connect a jumper wire to ground: The VTM-4 indicator should come on. Faulty gauge control module
      (1) With washer fluid level switch
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