2012 Honda Ridgeline RTSFACTORY OEM SERVICE PROCEDURE

Relay Control Module Input Test

NOTE: Check the No. 22 (120 A), No. 23 (60 A), No. 15 (40 A) fuse in the under-hood fuse/relay box before testing.
  1. Before troubleshooting the multiplex integrated control system, do the B-CAN System Diagnosis Test mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
  2. Turn the ignition switch to LOCK (0).
  3. Check the No. 7 (7.5 A) fuse in the under-hood fuse/relay box.
  4. Remove the under-hood fuse/relay box under cover (see REMOVAL AND INSTALLATION ).
  5. Disconnect under-hood fuse/relay box connector J (10P).
    Fig 1: Identifying Under-Hood Fuse/Relay Box Connector J (10P) Terminals
    G05968653Courtesy of AMERICAN HONDA MOTOR CO., INC.
  6. 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 7.
  7. Reconnect the connector to the under-hood fuse/relay box, and do the following input tests:
  • 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 ).
WIRE TEST CONDITION REFERENCE CHART

Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
J9
.
J10		 BLK In all ignition switch positions Measure the voltage to ground:
There should be less than 0.2 V.
  • Poor ground(G202)
  • An open or high resistance in the ground wire
J2 YEL Ignition switch ON (II) Measure the voltage to ground:
There should be battery voltage.
  • Blown No. 21 (7.5 A) fuse in the under-dash fuse/relay box
  • An open or high resistance in the wire
J8 BLU Under all conditions Check for continuity between terminal J8 and under-dash fuse/relay box connector D (17P) terminal No. 11:
There should be continuity.		 An open or high resistance 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.

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