2012 Acura MDXFACTORY OEM SERVICE PROCEDURE

Power Tilt/Telescopic Steering Control Unit Input Test

NOTE: Before troubleshooting the DPMS, troubleshoot the multiplex integrated control system first using B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
  1. Turn the ignition switch to LOCK (0).
  2. Remove the steering column cover (see COLUMN COVER REMOVAL/INSTALLATION ).
  3. Disconnect 16P connector (A) and 8P connector (B) from the power tilt/telescopic steering control unit (C).
    Fig 1: Identifying 16P Connector And 8P Connector Terminals
    G08053974Courtesy 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 power tilt/telescopic steering control unit, 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 control unit must be faulty; replace it.
Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
A8 BLK In all ignition switch positions Measure the voltage to ground: There should be less than 0.2 V.
  • Poor ground (G503, G506) or an open in the ground wire
  • An open or high resistance in the wire
B1
A1 WHT Under all conditions Measure the voltage to ground: There should be battery voltage.
  • Blown No. 4 (40 A) fuse in the main under-hood fuse box
  • Blown No. 7 (10 A) fuse in the under-dash fuse/relay box
  • Faulty main under-hood fuse box
  • Faulty under-dash fuse/relay box
  • An open or high resistance in the wire
A9 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
  • Faulty under-dash fuse/relay box
  • An open or high resistance in the wire
B3 WHT Under all conditions Measure the voltage to ground: There should be battery voltage.
  • Blown No. 3 (P/W) (50 A) fuse in the main under-hood fuse box
  • Blown No. 28 (20 A) fuse in the under-dash fuse/relay box
  • Faulty main under-hood fuse box
  • Faulty under-dash fuse/relay box
  • An open or high resistance in the wire
B5 GRN Under all conditions Measure the voltage to ground: There should be battery voltage.
  • Blown No. 2 (OP2) (40 A) fuse in the main under-hood fuse box
  • Blown No. 15 (20 A) fuse in the under-dash fuse/relay box
  • Faulty main under-hood fuse box
  • Faulty under-dash fuse/relay box
  • An open or high resistance in the wire
A6
.
A15		 GRN
.
BRN		 TELESCOPIC switch in RETRACT Measure the voltage between the terminals: There should be less than 0.2 V.
  • Faulty power tilt/telescopic steering switch
  • An open or high resistance in the wire
A10
.
A14		 LT BLU
.
PUR		 TELESCOPIC switch in RETRACT Measure the voltage between the terminals: There should be less than 0.2 V.
  • Faulty power tilt/telescopic steering switch
  • An open or high resistance in the wire
A14
.
A15		 PUR
.
BRN		 TELESCOPIC switch in EXTEND Measure the voltage between the terminals: There should be less than 0.2 V.
  • Faulty power tilt/telescopic steering switch
  • An open or high resistance in the wire
A6
.
A10		 GRN
.
LT BLU		 TELESCOPIC switch in EXTEND Measure the voltage between the terminals: There should be less than 0.2 V.
  • Faulty power tilt/telescopic steering switch
  • An open or high resistance in the wire
A7
.
A15		 GRN
.
BRN		 TILT switch in UP position Measure the voltage between the terminals: There should be less than 0.2 V.
  • Faulty power tilt/telescopic steering switch
  • An open or high resistance in the wire
A6
.
A10		 GRN
.
LT BLU		 TILT switch in UP position Measure the voltage between the terminals: There should be less than 0.2 V.
  • Faulty power tilt/telescopic steering switch
  • An open or high resistance in the wire
A7
.
A10		 GRN
.
LT BLU		 TILT switch in DOWN position Measure the voltage between the terminals: There should be less than 0.2 V.
  • Faulty power tilt/telescopic steering switch
  • An open or high resistance in the wire
A6
.
A15		 GRN
.
BRN		 TILT switch in DOWN position Measure the voltage between the terminals: There should be less than 0.2 V.
  • Faulty power tilt/telescopic steering switch
  • An open or high resistance in the wire
Factory Service Tools

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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.