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

Relay Control Module Input Test

2008 Acura RLSECTION Relay 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 ON (II), and remove the under-hood fuse/relay box undercover (see REMOVAL AND INSTALLATION ).
  2. Disconnect under-hood fuse/relay box connector J (10P).
    Fig 1: Identifying Under-Hood Fuse/Relay Box 10P Connector
    G05496801Courtesy 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 look OK, go to step 4.
  4. Reconnect the connector to the under-hood fuse/relay box, 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, go to step 5.
    CONNECTOR TERMINALS REFERENCE

    Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
    J10 BLK Under all conditions Measure the voltage to ground:
    There should be less than 0.5 V.
    • Poor ground (G301)
    • An open in the wire
    J8 YEL 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
  5. Disconnect under-hood fuse/relay box connector J (10P), 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, the relay control module must be faulty, replace the under-hood fuse/relay box (see REMOVAL AND INSTALLATION ).
    CONNECTOR TERMINALS REFERENCE

    Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
    J7 LT GRN Under all conditions Check for continuity between J7 terminal and the driver's under-dash fuse/relay box connector D (17P)No. 11 terminal:
    There should be continuity.    		 An open in the wire
    Under all conditions (Driver's under-dash fuse/relay box connector D(17P) disconnected) 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.
  • • You are not confident in the next step or safety outcome.