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Gauge Control Module Input Test

WARNING: This page is about a different car, the 2011 Honda Pilot, 2010 Honda Pilot, and 2009 Honda Pilot. However, it is still accessible from the selected car via links, so may be relevant.
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 Gauge Control Module 32P Connector Terminals
    G05966470Courtesy 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 these input tests at the following 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.
    POSSIBLE CAUSE REFERENCE TABLE

    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 (SMALL position) ON Connect a jumper wire to ground:
    The illuminations of the hazard switch light and seat heater switches light come on full bright.
    • Faulty bulbs
    • An open in the wire
    2 YEL Combination light switch (SMALL position) ON Connect jumper wire to ground:
    The illuminations of the ambient lights, the audio unit light, and the climate control unit lights 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 these input tests.
POSSIBLE CAUSE REFERENCE TABLE

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 ground 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 ground wire
5* BLU Ignition switch ON (II), Washer fluid is half or more in the washer reservoir Measure the voltage to ground:
There should be more than 5 V.
  • Faulty gauge control module
  • Faulty washer fluid level switch
  • A short to ground in the wire
Ignition 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 oepn 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 more than 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 level in the reservoir Measure the voltage to ground:
There should be less than 0.2 V.
  • Poor ground (G303)
  • Faulty brake fluid level switch
  • An open or high resistance in the wire
Ignition switch ON (II), brake fluid is full level in the reservoir Measure the voltage to ground:
There should be more than 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
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