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Gauge Control Module Input Test

NOTE: Before testing, do the gauge control module self-diagnostic procedure.
  1. Turn the ignition switch OFF.
  2. Remove the gauge control module and disconnect its connectors (see GAUGE CONTROL MODULE REPLACEMENT ).
    Fig 1: Identifying Gauge Control Module Connector Terminals
    G05456720Courtesy 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, make these input tests at the appropriate 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.
    GAUGE CONTROL MODULE INPUT

    Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained
    B8 ORN Under all conditions Attach to ground:
    The horn sounds.
    • Blown No. 16 (15 A) fuse in the under-hood fuse/relay box
    • Faulty horn relay
    • An open in the wire
    C19 BLU Under all conditions Attach to ground:
    Exterior lights and interior lights come on.
    • Blown No. 9 (30 A) fuse in the under-hood fuse/relay box
    • Blown No. 22(10 A) fuse in the under-dash fuse/relay box
    • Faulty taillight relay
    • An open in the wire
    C36 BRN/YEL Under all conditions Attach to ground:
    Headlights come on.
    • Poor ground (G402)
    • Blown No. 12 (20 A) fuse and No. 13 (20 A) fuse in the under-hood fuse/relay box
    • An open in the wire
    C40 LT GRN/ RED Under all conditions Momentarily connect C40 terminal to A1 terminal with a jumper wire:
    All doors should lock.
    • Faulty door lock relay
    • Poor ground(G402)
    • An open in the wire
    B3 YEL/GRN Under all conditions Momentarily connect B3 terminal to A1 terminal with a jumper wire:
    Driver's door should unlock.
    • Faulty driver's door unlock relay
    • Poor ground(G402)
    • An open in the wire
    C20 GRN Under all conditions Momentarily connect C20 terminal to A1 terminal with a jumper wire:
    Passenger doors/tailgate should unlock
    • Faulty passenger's door/tailgate unlock relay
    • Poor ground (G402)
    • An open in the wire
  5. Reconnect the connectors to the gauge control module, and perform these input tests at the appropriate connectors.
    • 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.
GAUGE CONTROL MODULE INPUT

Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained
A1 WHT/RED Under all conditions Measure the voltage to ground:
There should be battery voltage.
  • Blown No. 8 (10 A) fuse in the under-hood fuse/relay box
  • An open in the wire
A2 YEL Ignition switch ON (II) Measure the voltage to ground:
There should be battery voltage.
  • Blown No. 3 (10 A) fuse in the under-dash fuse/relay box
  • An open in the wire
A9 BLK Under all conditions Measure the voltage to ground:
There should be less than 0.5 V.
  • Poor ground (G402)
  • An open in the wire
A19
A11(2) BLK Under all conditions Check for continuity to ground:
There should be continuity.
  • An open in the wire
  • Poor ground (G402)
B11(1) YEL Ignition switch ON (II) Measure the voltage to ground:
There should be battery voltage.
  • Blown No. 3(10 A) fuse in the under-dash fuse/relay box
  • An open in the wire
A12 GRN/RED Ceiling light at door position, one of the doors open Measure the voltage to ground:
There should be less than 1 V. (Ceiling light should come on)
  • Faulty ceiling light
  • An open in the wire
Ceiling light at door position, all the doors closed Measure the voltage to ground:
There should be battery voltage. (Ceiling light should be off)
  • Faulty ceiling light
  • Faulty door switch
  • A short to ground in the wire
A13 PUR Front passenger's door and rear doors closed Measure the voltage to ground:
There should be 5 V or more.
  • Faulty door switch
  • A short to ground in the wire
Front passenger's door or rear door open Measure the voltage to ground:
There should be less than 1 V.
  • Faulty door switch
  • An open in the wire
A14 GRN Driver's door closed Measure the voltage to ground:
There should be 5 V or more.
  • Faulty driver's door switch
  • A short to ground in the wire
Driver's door open Measure the voltage to ground:
There should be less than 1 V.
  • Faulty driver's door switch
  • An open in the wire
A16 GRN/RED Tailgate closed Measure the voltage to ground:
There should be 5 V or more.
  • Faulty tailgate latch switch
  • A short to ground in the wire
Tailgate open Measure the voltage to ground:
There should be less than 1 V.
  • Poor ground (G501)
  • Faulty tailgate latch switch
  • An open in the wire
C18(1) BRIM Ignition switch ON (II) Attach to ground:
Washer fluid level indicator come on.
  • An open in the wire
  • Faulty gauge control module
C28 LT GRN/ BLK Cruise RESUME switch ON Using a jumper wire, connect the C28 terminal to body ground:
The horn sounds.
  • An open in the wire
  • Faulty cruise control combination switch
  • Faulty cable reel
C29 GRY/RED Cruise SET switch ON Using a jumper wire, connect the C29 terminal to body ground:
The horn sounds.
  • An open in the wire
  • Faulty cruise control combination switch
  • Faulty cable reel
C30 PUR Ignition switch ON (II), and cruise MAIN switch ON Measure the voltage to ground:
There should be less than 1 V.
  • An open in the wire
  • Poor ground (G403)
  • Faulty cruise control combination switch
  • Faulty cable reel
(1) Canada models
(2) With keyless system
GAUGE CONTROL MODULE INPUT

Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained
C7 YEL/RED Driver's door lock knob switch locked Measure the voltage to ground:
There should be less than 1 V.
  • Poor ground(G402)
  • Faulty driver's door lock knob switch
  • An open in the wire
Driver's door lock knob switch unlocked Measure the voltage to ground:
There should be 5 V or more.
  • Faulty driver's door lock knob switch
  • A short to ground in the wire
C8 WHT/BLK Driver's door lock knob switch unlocked Measure the voltage to ground:
There should be less than 1 V.
  • Poor ground(G402)
  • Faulty driver's door lock knob switch
  • An open in the wire
Driver's door lock knob switch locked Measure the voltage to ground:
There should be 5 V or more
  • Faulty driver's door lock knob switch
  • A short to ground in the wire
C9 WHT/GRN Driver's door lock switch locked Measure the voltage to ground:
There should be less than 1 V.
  • Poor ground(G402)
  • Faulty driver's door lock switch
  • An open in the wire
Driver's door lock switch in neutral Measure the voltage to ground:
There should be 5 V or more.
  • Faulty driver's door lock switch
  • A short to ground in the wire
C10 WHT/BLU Driver's door lock switch unlocked Measure the voltage to ground:
There should be less than 1 V.
  • Poor ground (G402)
  • Faulty driver's door lock switch
  • An open in the wire
Driver's door lock switch in neutral Measure the voltage to ground:
There should be 5 V or more.
  • Faulty driver's door lock switch
  • A short to ground in the wire
C11 GRN/WHT Ignition key inserted into the ignition switch Measure the voltage to ground:
There should be less than 1 V.
  • Poor ground(G402)
  • Faulty ignition key switch
  • An open in the wire
Ignition key removed from the ignition switch Measure the voltage to ground:
There should be 5 V or more.
  • A short to ground in the wire
  • Faulty ignition key switch
C17 BLU/ORN Under all conditions Check for continuity between the C17 terminal and the keyless receiver unit 5P connector No. 2 terminal with the 5P connector disconnected: There should be continuity. An open in the wire
C16 WHT Driver's door lock key cylinder unlocked Measure the voltage to ground:
There should be less than 1 V.
  • Poor ground(G402)
  • Driver's key cylinder switch
  • An open in the wire
Driver's door lock key cylinder in neutral Measure the voltage to ground:
There should be 5 V or more.
C22 LT BLU Engine stopped Measure the voltage to ground:
There should be less than 1 V.
  • Faulty oil pressure switch
  • An open in the wire
Engine running Measure the voltage to ground:
There should be battery voltage.
  • Faulty oil pressure switch
  • A short to ground in the wire
A15 RED Headlights on, and dash lights brightness controller knob turned Measure the voltage between A 9 terminal and A15 terminal: Full bright should be battery voltage. Full dim about 2.5 V.
  • Faulty dash lights brightness controller
  • Poor ground(G402)
  • An open in the wire
  • A short to ground in the wire
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