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Parking and Back-up Sensor Control Unit Input Test/Replacement

WARNING: This page is about a different car, the 2011 Honda Pilot, 2010 Honda Pilot, and 2009 Honda Pilot. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Before testing, troubleshoot the multiplex integrated control unit first, using B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
  1. Remove the driver's dashboard lower cover (see DRIVER'S DASHBOARD LOWER COVER REMOVAL/INSTALLATION ).
  2. Disconnect the 16P connector (A) from the parking and back-up sensor control unit (B).
    Fig 1: Identifying Back-Up Sensor Control Unit & 16P Connector
    G05966616Courtesy 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. With the connector still disconnected, do these input tests at the following connector.
    • If any test indicates a problem, find and correct the cause, then recheck the system.
    • If the input test proves OK, go to step  5.
    WIRE CONDITION TABLE

    Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
    5 BLK Ignition switch ON (II) and parking and back-up sensor switch ON Connect a jumper wire to ground:
    The parking and back-up sensor switch indicator should come on.
    • Blown No. 8 (7.5 A) fuse in the under-dash fuse/relay box
    • An open or high resistance in the wire
    • Blown bulb
    • Faulty parking and back-up sensor switch
    2 BLU Disconnect the left front corner parking sensor 6P connector Check for continuity between terminal No. 2 and left front corner parking sensor terminal No. 6:
    There should be continuity.    		 An open or high resistance in the wire
    Check for continuity between the terminal No. 2 and body ground:
    There should be no continuity.    		 A short to ground in the wire.
    3 GRY Disconnect the left front corner parking sensor 6P connector Check for continuity between terminal No. 3 and left front corner parking sensor terminal No. 4:
    There should be continuity.    		 An open or high resistance in the wire
    Check for continuity between terminal No. 3 and body ground:
    There should be no continuity.    		 A short to ground in the wire
    4 RED Disconnect the left front corner parking sensor 6P connector Check for continuity between terminal No. 4 and left front corner parking sensor terminal No. 2:
    There should be continuity.    		 An open or high resistance in the wire
    Check for continuity between terminal No. 4 and body ground:
    There should be no continuity.    		 A short to ground in the wire
    10 PUR Disconnect the left rear corner parking sensor 6P connector Check for continuity between terminal No. 10 and left rear corner parking sensor terminal No. 6:
    There should be continuity.    		 An open or high resistance in the wire
    Check for continuity between terminal No. 10 and body ground:
    There should be no continuity.    		 A short to ground in the wire
    11 BLK Disconnect the left rear corner parking sensor 6P connector Check for continuity between terminal No. 11 and left rear corner parking sensor terminal No. 4:
    There should be continuity.    		 An open or high resistance in the wire
    Check for continuity between terminal No. Hand body ground:
    There should be no continuity.    		 A short to ground in the wire
    12 ORN Disconnect the left rear corner parking sensor 6P connector Check for continuity between terminal No. 12 and left rear corner parking sensor terminal No. 2:
    There should be continuity.    		 An open or high resistance in the wire
    Check for continuity between terminal No. 12 and body ground:
    There should be no continuity.    		 A short to ground in the wire
  5. Reconnect the 16P connector to the parking/back-up sensor control unit, and do these input tests.
    • If any test indicates a problem, find and correct the cause, then recheck the system.
    • If all the input tests prove OK, control unit must be faulty; replace it.
    WIRE CONDITION TABLE

    Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained
    13 BLK In all ignition switch positions Measure the voltage to ground:
    There should be less than 0.2 V.
    • Poor ground (G403)
    • An open or high resistance in the ground wire
    16 BLK In all ignition switch positions Measure the voltage to ground:
    There should be less than 0.2 V.
    • Poor ground (G403)
    • An open or high resistance in the ground wire
    1 PNK Ignition switch ON (II) Measure the voltage to ground:
    There should be battery voltage.
    • Blown No. 8 (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
    8 GRN Ignition switch ON (II) and parking and back-up sensor switch ON Measure the voltage to ground:
    There should be battery voltage.
    • Blown No. 8 (7.5 A) fuse in the under-dash fuse/relay box
    • An open or high resistance in the wire
    • Faulty parking and back-up sensor switch
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