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HOMESERVICE MANUALSACURA2008RLREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESMULTIPLEX INTEGRATED CONTROL SYSTEMGAUGE CONTROL MODULE INPUT TEST
2008 Acura RL

Gauge Control Module Input Test

2008 Acura RLSECTION Gauge Control Module Input Test
NOTE: Before testing, troubleshoot B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A  ).
  1. Turn the ignition switch OFF.
  2. Remove the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).
  3. Disconnect gauge control module connectors A (20P) and B (28P).
    Fig 1: Identifying Gauge Control Module 20P And 28P Connectors
    G05496799Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. 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 look OK, go to step 5.
  5. Reconnect the connectors to the gauge control module, and make these input tests at the connectors.
    • 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 6.
    CONNECTOR TERMINALS REFERENCE

    Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
    A7 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
    A8 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
    B1 PNK Ignition switch ON (II) Measure the voltage to ground:
    There should be battery voltage.
    • Blown No. 21 (10 A) fuse in the driver's under-dash fuse/relay box
    • An open in the wire
    B2 WHT Under all conditions Measure the voltage to ground:
    There should be battery voltage.
    • Blown No. 15 (40 A) fuse in the under-hood fuse/relay box
    • Blown No. 7 (10 A) fuse in the driver's under-dash fuse/relay box
    • An open in the wire
  6. Disconnect the A (20P) and B (28P) connectors from the gauge control module, and 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, replace the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).
    CONNECTOR TERMINALS REFERENCE

    Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
    B17 LTGRN Driver's under-dash fuse/relay box connector N (45P) disconnected Check for continuity between the B17 terminal and driver's under-dash fuse/relay box connector N (45P) No. 22 terminal:
    There should be continuity.    		 An open in the wire
    Check for continuity to ground:
    There should be no continuity.    		 A short to ground in the wire
RENDER: 1.0x

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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.
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