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).
  1. Remove the driver's dashboard undercover, then remove the dashboard lower cover.
  1. Remove the gauge control module, and disconnect the 32P connector (A) from it.
  1. 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 .
  1. 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, the gauge control module must be faulty; replace it.
    Cavity
    Wire
    Test condition
    Test: Desired result
    Possible cause if desired result is not obtained
    17
    BRN
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G501)
    • An open in the wire
    1
    BLK
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G502)
    • An open in the wire
    15
    BRN
    Ignition switch ON (II)
    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
    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
    [25] *
    BRN
    Under all conditions
    Check for continuity to ground: There should be continuity.
    • Poor ground (G501)
    • An open in the wire
    3
    RED
    Combination light switch ON
    Attach to ground: The dash lights, audio unit light, and climate (or HVAC) control unit light should come on full bright.
    • Faulty LEDs and bulbs
    • An open in the wire
    2
    RED
    Combination light switch ON
    Attach to ground: The sunroof switch light and seat heater switch lights should come on full bright.
    • Faulty LEDs and bulbs
    • An open in the wire
    4
    GRN
    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 driver's MICU
    • Faulty combination light switch
    • An open in the wire
    5
    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 driver's MICU
    • Faulty combination light switch
    • An open in the wire
    32
    GRN
    Ignition switch ON (II), brake fluid is 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 lower level in the reservoir
    Measure the voltage to ground: There should be less than 1 V.
    • Poor ground (G302) [G201]
    • Faulty brake fluid level switch
    • An open in the wire
    31
    LT GRN
    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 more.
    • Faulty parking brake switch
    • A short to ground in the wire
    8 *
    BLK
    Under all conditions
    Check for continuity to ground: There should be no continuity.
    Short to ground in the wire

    [ ]:
    RHD model

    *:
    The No. 8 terminal is not used. If the terminal is short to ground, the trouble might be caused on the multi-information display (MID).