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HOMESERVICE MANUALSACURA2008RDXREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTGAUGES & INSTRUMENT PANELSGAUGESGAUGE CONTROL MODULE INPUT TEST
2008 Acura RDX

Gauge Control Module Input Test

2008 Acura RDXSECTION Gauge Control Module Input Test
NOTE: Before testing, do the gauge control module self-diagnosis procedure, and make sure the B-CAN communication line is OK.
  1. Turn the ignition switch OFF.
  2. Remove the gauge control module and disconnect the 36P connector from it (see GAUGE CONTROL MODULE REPLACEMENT ).
    Fig 1: Identifying Gauge Control Module 36 P Connector
    G05446493Courtesy 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.
    SYMPTOM CHART

    Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
    15 YEL Combination light switch ON Attach to ground:
    The illuminations of the ambient lights and seat heater switches lights come on full.
    • Faulty LEDs and bulbs
    • An open in the wire
    16 RED Combination light switch ON Attach to ground:
    The illuminations of the dash lights, the audio unit, and the climate control switch lights come on full bright.
    • Faulty LEDs and bulbs
    • An open in the wire
    18 YEL 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 in the wire
    17 BRN 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 in the wire
  5. Reconnect the connector to the gauge control module, turn the ignition switch ON (II), and make the input tests at the connector.
    • 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.
    SYMPTOM CHART

    Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
    1 BLK Under all conditions Measure the voltage to ground:
    There should be less than 0.5 V.
    • Poor ground (G501)
    • An open in the wire
    19 BLK Under all conditions Measure the voltage to ground:
    There should be less than 0.5 V.
    • Poor ground (G501)
    • An open in the wire
    35 BRN 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
    • An open in the wire
    36 GRN 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
    • An open in the wire
    21 GRY (Canada models) Ignition switch ON (II), washer fluid is half or more in the washer reservoir Measure the voltage to ground:
    There should be 5 V or more.
    • 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 1 V.
    • Poor ground (G401)
    • Faulty washer fluid level switch
    • An open in the wire
    22 PNK Ignition switch ON (II), brake fluid is to the full level in the reservoir Measure the voltage to ground:
    There should be 5 V or more.
    • Faulty brake fluid level switch
    • A short to ground in the wire
    Ignition switch ON (II), brake fluid is to the lower level in the reservoir Measure the voltage to ground:
    There should be less than 1 V.
    • Poor ground (G451)
    • Faulty brake fluid level switch
    • An open in the wire
    23 LT BLU Ignition switch ON (II), parking brake lever pulled Measure the voltage to ground:
    There should be less than 1 V.
    • Faulty parking brake switch
    • An open in the wire
    Ignition switch ON (II), parking brake lever released Measure the voltage to ground:
    There should be 5 V or more.
    • Faulty parking brake switch
    • A short to ground in the wire
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.