INSTALLATION INSTRUCTIONS Accessory Application TRAILER HITCH 2012 MDX Publications No. BII 46637 Issue Date OCT 2011 PARTS LIST Receiver cover Trailer hitch Hitch pin Left bracket Hitch pin clip Trailer Harness Kit P/N 08L91-STX-200A Right bracket Trailer hitch control unit 12 Washer bolts, 14 x 40 mm Trailer socket 2 Washer bolts, 12 x 33 mm 12 Washers, 14 mm Control unit bracket 2 Washers, 12 mm Ball mount © 2011 American Honda Motor Co., Inc. – All Rights Reserved. Socket bracket BII 46637 (1110) 08L92-STX-2A00-91 1 of 12 TOOLS AND SUPPLIES REQUIRED Control unit harness Phillips screwdriver Diagonal cutters Plastic trim tool (T/N SILTRIMTL10) Clip remover Ratchet 10 mm, 17 mm, and 19 mm Sockets Subharness 10 mm Wrench Torque wrench 19 mm Combination wrench Gloves Illustration of the Trailer Hitch Installed on the Vehicle 2 Relays CONTROL UNIT HARNESS RELAY 2 Fuses (7.5A) 3 Fuses (20A) 5 Wire ties TRAILER HITCH CONTROL UNIT TRAILER SOCKET TRAILER HITCH 5 Flange bolts, 6 x 16 mm Accessory User’s Information Manual 2 of 12 BII 46637 (1110) © 2011 American Honda Motor Co., Inc. – All Rights Reserved. INSTALLATION 4. Remove the rear bumper trim from the rear bumper (10 clips). Set the rear bumper trim aside, it will not be reused. Client Information: The information in this installation instruction is intended for use only by skilled technicians who have the proper tools, equipment, and training to correctly and safely add equipment to your vehicle. These procedures should not be attempted by “do-it-yourselfers.” NOTE: • Be careful not to damage the rear bumper or other surfaces of the body. • Allow the exhaust system to cool down before installing the trailer hitch. 1. Make sure you have the anti-theft code for the radio, then write down the frequencies for the preset buttons. 2. Disconnect the negative cable from the battery. 3. Open the tailgate. Open the trim cover. Using the vehicle wheel wrench, lower the spare tire completely. TRIM COVER SPARE TIRE HOIST BOLT REAR BUMPER TRIM Set aside. 10 CLIPS 5. When the exhaust system has cooled down, remove the two rubber mounts that secure the left muffler to the body, then carefully lower the left muffler. Remove the rubber mounts and lower the right muffler. RUBBER MOUNT SPARE TIRE LEFT MUFFLER © 2011 American Honda Motor Co., Inc. – All Rights Reserved. BII 46637 (1110) 3 of 12 6. Remove the left heat shield (three washer bolts). 10. Install the socket bracket to the trailer hitch with two 6 x 16 mm flange bolts. 2 FLANGE BOLTS, 6 x 16 mm TRAILER HITCH 3 WASHER BOLTS SOCKET BRACKET LEFT HEAT SHIELD 7. Remove the right heat shield (three washer bolts). 8. Position the left bracket on the body, and install it with four 14 x 40 mm washer bolts and four 14 mm washers. Torque the bolts to 75 N.m (55 lb-ft). LEFT BRACKET 4 WASHERS, 14 mm 11. When the help of an assistant, position the trailer hitch under the body. Loosely install the two 12 x 33 mm washer bolts with two 12 mm washers, and the four 14 x 40 mm washer bolts with four 14 mm washers. 4 WASHER BOLTS, 14 x 40 mm Torque: 75 N.m (55 lb-ft) TRAILER HITCH WASHER, 12 mm WASHER, 14 mm WASHER, 12 mm 9. WASHER BOLT, 14 x 40 mm Install the right bracket. WASHER BOLT, 12 x 33 mm WASHER BOLT, 14 x 40 mm WASHER BOLT, 12 x 33 mm 4 of 12 BII 46637 (1110) © 2011 American Honda Motor Co., Inc. – All Rights Reserved. 12. Torque the four 14 x 40 mm washer bolts to 95 N.m (70 lb-ft), then torque the two 12 x 33 mm washer bolts to 58 N.m (42 lb-ft). 15. Turn the knobs, then remove the cover from the rear cargo tray. FRONT TRAILER HITCH LEFT BRACKET COVER WASHER BOLT, 12 x 33 mm Torque: 58 N.m (43 lb-ft) WASHER BOLT, 12 x 33 mm Torque: 95 N.m (70 lb-ft) KNOB 13. Reinstall the heat shields and rubber mounts. 16. Remove the rear trim panel (four retaining tabs and four clips). 14. Lift up the lock handle and remove the rear cargo floor lid. REAR CARGO FLOOR LID REAR CARGO TRAY REAR TRIM PANEL LOCK HANDLE © 2011 American Honda Motor Co., Inc. – All Rights Reserved. 4 CLIPS BII 46637 (1110) 4 RETAINING TABS 5 of 12 17. Remove the two cargo lid hinges (two self-tapping screws), and remove the rear cargo tray. SELF-TAPPING SCREW CARGO LID HINGE 19. Remove the three mounting bolts from the vehicle control unit, then move the vehicle control unit out of the way without unplugging the connector. SELF-TAPPING SCREW REAR CARGO TRAY CARGO LID HINGE VEHICLE CONTROL UNIT 18. Remove the fuse box lid from the left rear side lining (five clips and two retaining tabs). 3 MOUNTING BOLTS 20. Slide the control unit bracket onto the trailer hitch control unit. LEFT REAR SIDE LINING TRAILER HITCH CONTROL UNIT CONTROL UNIT BRACKET 5 CLIPS FUSE BOX LID RETAING TAB 6 of 12 BII 46637 (1110) © 2011 American Honda Motor Co., Inc. – All Rights Reserved. 21. Install the two relays into the control unit harness relay block. 24. Position the control unit bracket on the vehicle frame and install it with the 6 x 16 mm flange bolt. RELAY CONTROL UNIT HARNESS RELAY BLOCK CONTROL UNIT HARNESS VEHICLE FRAME CONTROL UNIT BRACKET 22. Plug the control unit harness 12-pin connector into the trailer hitch control unit. CONTROL UNIT BRACKET FLANGE BOLT, 6 x 16 mm 25. Route the control unit harness 14-pin connector under the left rear side lining, and plug the control unit harness 14-pin connector into the fuse box as shown. SQUARE HOLE LEFT REAR SIDE LINING REAR FUSE BOX CLIP TRAILER HITCH CONTROL UNIT RELAY BLOCK CONTROL UNIT HARNESS 12-PIN CONNECTOR 23. Push the clip on the relay block into the square hole in the control unit bracket. © 2011 American Honda Motor Co., Inc. – All Rights Reserved. BII 46637 (1110) CONTROL UNIT HARNESS 14-CONNECTOR 7 of 12 26. Slide the 7-pin socket into the socket bracket, and secure the 7-pin socket with two 6 x 16 mm flange bolts. WIRE TIE 28. Inside the cargo area along the rear panel, locate and remove the grommet from the body panel. Under the vehicle, locate and remove the grommet from the bottom body panel. Discard both grommets. TRAILER HITCH SOCKET BRACKET TRAILER SOCKET HARNESS 7-PIN SOCKET TRAILER SOCKET 8-PIN CONNECTOR FLANGE BOLT, 6 x 16 mm 27. Attach the trailer socket harness to the trailer hitch with one wire tie. GROMMET Discard. FIRST GROMMET Seat this grommet in the rear panel hole. CARGO AREA REAR PANEL BOTTOM BODY PANEL FRONT SECOND GROMMET Seat this grommet in the bottom body panel hole. 29. Route the trailer socket 8-pin connector up through the hole in the bottom body panel, then through the hole in the rear panel and into the cargo area. 30. Pull the first grommet completely through the hole in the bottom body panel, and seat the first grommet in the rear panel hole. Seat the second grommet in the bottom body panel hole. Take care not to pull too hard on the harness while installing the grommets. 8 of 12 BII 46637 (1110) © 2011 American Honda Motor Co., Inc. – All Rights Reserved. 31. Remove the vehicle ground bolt, then secure the trailer socket ground terminal using the vehicle ground bolt. Installing the Fuses 35. Install the two 20A fuses and the two 7.5A fuses into the slots in the rear fuse box. VEHICLE GROUND BOLT Reuse. TRAILER SOCKET GROUND TERMINAL FUSE (7.5A) TRAILER SOCKET 8-PIN CONNECTOR 32. Plug the control unit harness 8-pin connector into the trailer socket 8-pin connector. FUSE (7.5A) REAR FUSE BOX CONTROL UNIT HARNESS 8-PIN CONNECTOR 910123BT FUSE (20A) FUSE (20A) 36. Open the hood. Open the under hood fuse box lid. Install the 20A fuse into the slot shown in the under hood fuse box. Reinstall the under hood fuse box lid. 33. Secure the trailer socket harness and control unit harness to the vehicle harness with four wire ties in the areas shown. FUSE (20A) UNDER HOOD FUSE BOX LID UNDER HOOD FUSE BOX FRONT VEHICLE HARNESS FUSE (20A) TRAILER SOCKET HARNESS HOOD WIRE TIE VEHICLE HARNESS WIRE TIE CONTROL UNIT HARNESS 910124AT 37. Slide the ball mount into the trailer hitch. Align the hole in the trailer hitch with the hole in the ball mount, then insert the hitch pin into the hole. Secure the hitch pin with the hitch pin clip. 34. Reinstall the vehicle control unit. © 2011 American Honda Motor Co., Inc. – All Rights Reserved. BII 46637 (1110) 9 of 12 40. Reinstall all removed parts. Check that all clips and fasteners are installed securely. 41. Reconnect the negative cable to the battery. Check that all electrical systems function properly. HITCH PIN 42. Enter the client’s radio anti-theft code, and reset the radio station presets. 43. Reset the clock. 44. Check the operation of the trailer harness according to the Accessory User’s Information Manual supplied. TRAILER HITCH BALL MOUNT NOTE: After about 620 miles (1,000 km) of towing, recheck the torque of the trailer hitch bolts. HITCH PIN CLIP 38. Check that all wire harnesses and cables are routed properly and that all connectors are plugged in. 39. Reinstall the spare tire: • Slowly turn the wheel nut wrench clockwise to take up the slack of the hoist cable. Make sure the bracket is seated in the center hole of the rim. • Turn the wheel nut wrench clockwise until the tire rests against the underbody of the vehicle and you hear the hoist click. WHEEL NUT WRENCH HOIST CABLE 10 of 12 SPARE TIRE BII 46637 (1110) © 2011 American Honda Motor Co., Inc. – All Rights Reserved. Put a copy of this Page in the Glove Box for Your Client Installing the Receiver Cover When you remove the hitch pin clip, the hitch pin, and the ball mount, securely store them in the cargo area. Then install the receiver cover onto the opening at the end of the trailer hitch. When you reinstall the ball mount, store the receiver cover in the cargo area. TRAILER HITCH RECEIVER COVER Subharness for Electric Brake Controller This harness adapts an electric trailer brake controller to your vehicle. Have a qualified technician install your trailer brake controller following the trailer brake controller manufacturer's instructions. For more information, refer to “Towing a Trailer” in your vehicle owner’s manual. SUBHARNESS © 2011 American Honda Motor Co., Inc. – All Rights Reserved. BII 46637 (1110) 11 of 12 CIRCUIT DIAGRAM DIAGRAM CIRCUT REAR FUSE BOX (7.5A) (20A) (20A) BLU GRY GRN/ BLK (7.5A) BLU/ PUR LT RED/ BLU BRN BRN GRN GRN GRN YEL BLK/ WHT BLU RED/GRN BLK/ YEL WHT GRN/ GRY BLK LT GRN PUR BLU/GRN YEL BLK GRN CHARGE RELAY BLK BLK TRAILER UNIT BLK SMALL LIGHT RELAY RED YEL BRN BLU GRN BLK RED Y EL BLK B RN BLU GRN BLK RED Y EL BLK B RN BLK YEL GRN BLK SMALL LIGHT +B RED LEFT TURN/ STOP BRN BACK LIGHT GND RIGHT TURN/STOP ELEC BRAKE WHT BLU SOCKET 7-PIN CONNECTOR 12 of 12 BII 46637 (1110) BLK BLACK BRN BROWN YEL YELLOW ORN ORANGE BLU BLUE PUR PURPLE GRN GREEN NAT NATURAL RED RED PNK PINK WHT WHITE GRY GRAY LT BLU LIGHT BLUE LT GRN LIGHT GREEN © 2011 American Honda Motor Co., Inc. – All Rights Reserved.