2004 Acura TL AutomaticFACTORY OEM SERVICE PROCEDURE

Relay Control Module Input Test

  1. Remove the under-hood fuse/relay box undercover (see REMOVAL AND INSTALLATION ).
  2. Disconnect the under-hood fuse/relay box connector K (10P).
    Fig 1: Identifying Under-Hood Fuse/Relay Box Connector K (10P) Terminals
    G03662051Courtesy 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, 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.
    RELAY CONTROL MODULE INPUT TEST - REFERENCE DATA

    Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained
    K10 BLK Under all conditions Check for voltage to ground: There should be less than 1 V.
    • Poor ground (G503, G601)
    • An open in the wire
    K8 YEL Ignition switch ON (II) Check for voltage to ground:
    There should be battery voltage.
    • Blown No. 21 (7.5 A) fuse in the under-dash fuse/relay box
    • An open in the wire
  5. Disconnect the 10P connector from 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, the relay module must be faulty, replace the under-hood fuse/relay box.
RELAY CONTROL MODULE INPUT TEST - REFERENCE DATA

Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained
K7 BLU Under all conditions Check for continuity between K7 terminal and the under-dash fuse/relay box connector D (17P) No. 11 terminal: There should be continuity. An open in the wire
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
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When to See a Mechanic

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.