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Gauge Control Module Input Test

WARNING: This page is about a different car, the 2011 Acura TL, 2010 Acura TL, and 2009 Acura TL. 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 (see SELF-DIAGNOSTIC FUNCTION ), and make sure the B-CAN communication lines are OK
  1. Remove the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ), and disconnect the 32P connector (A) from it
    Fig 1: Identifying Gauge Control Module And 32P Connector Terminal
    G05989085Courtesy of AMERICAN HONDA MOTOR CO., INC.

    * Canada models 

  2. 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 3
  3. With the connector 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 4
    POSSIBLE CAUSE RESULT REFERENCE

    Cavity Wire Test condition Test Desired result Possible cause if desired result is not obtained
    27 LT BLU Combination light switch ON Connect a jumper wire to ground The dash lights, audio unit light, and climate control unit light, moonroof switch light, and seat heater switch lights should come on full bright
    NOTE: To help test the vehicle, park it in a dark or shaded area, and compare it to a known-good vehicle
    • Faulty LEDs and bulbs
    • An open in the wire
    13 GRN Ignition switch ON (II), or power mode ON, turn signal switch in RIGHT Measure the voltage to ground There should be battery voltage when the lights are flashing
    • Faulty driver's MICU
    • Faulty combination light switch
    • An open in the wire
    14 BLU Ignition switch ON (II), or power mode ON, turn signal switch in LEFT Measure the voltage to ground There should be battery voltage when the lights are flashing
    • Faulty driver's MICU
    • Faulty combination light switch
    • An open in the wire
    25 BLU Disconnect driver's under-dash fuse/relay box connector P (20P) Check for continuity between the terminal No 23 and driver's under-dash fuse/relay box connector P (20P) terminal No 5 There should be continuity An open in the B-CAN wire
    Check for continuity to ground There should be no continuity A short to ground in the B-CAN wire
    26 PNK Disconnect driver's under-dash fuse/relay box connector P(20P) Check for continuity between the terminal No 24 and driver's under-dash fuse/relay box connector P(20P) terminal No 6 There should be continuity An open in the B-CAN wire
    Check for continuity to ground There should be no continuity A short to ground in the B-CAN wire
  4. 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 all the input tests prove OK, the gauge control module must be faulty, replace it (see GAUGE CONTROL MODULE REPLACEMENT )
    POSSIBLE CAUSE RESULT REFERENCE

    Cavity Wire Test condition Test Desired result Possible cause if desired result is not obtained
    16 WHT Under all conditions Measure the voltage to ground There should be battery voltage
    • Blown No 15 (10 A) fuse in the under-hood fuse/relay box
    • An open in the wire
    15 BRN Ignition switch ON (II), or power mode ON Measure the voltage to ground There should be battery voltage
    • Blown No 5 (7 5 A) fuse in the driver's under-dash fuse/relay box
    • An open in the wire
    17 BLK Under all conditions Measure the voltage to ground There should be less than 0 2V
    • Poor ground (G401)
    • An open or high resistance in the wire
    1 BLK Under all conditions Measure the voltage to ground There should be less than 0 2V
    • Poor ground(G402)
    • An open or high resistance in the wire
    3(1) GRY Ignition switch ON (II), or power mode ON, washer fluid is half or more in the washer reservoir Measure the voltage to ground There should be at least 5 V
    • Faulty washer fluid level switch
    • A short to ground in the wire
    Ignition switch ON (II), or power mode ON washer fluid is empty in the washer reservoir Measure the voltage to ground There should be less than 0 2V
    • Poor ground (G201)
    • Faulty washer fluid level switch
    • An open in the wire
    19 GRN Ignition switch ON (II), or power mode ON, brake fluid is full level in the reservoir Measure the voltage to ground There should be at least 5 V
    • Faulty brake fluid level switch
    • A short to ground in the wire
    Ignition switch ON (II), or power mode ON, brake fluid is lower level in the reservoir Measure the voltage to ground There should be less than 0 2V
    • Poor ground(G302)
    • Faulty brake fluid level switch
    • An open in the wire
    20 LT GRN Ignition switch ON (II), or power mode ON, parking brake lever pulled Measure the voltage to ground There should be less than 0 2V
    • Faulty parking brake switch
    • An open in the wire
    Ignition switch ON (II), or power mode ON, parking brake lever released Measure the voltage to ground There should be at least 5 V
    • Faulty parking brake switch
    • A short to ground in the wire
    (1) Canada models
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