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Home >> Acura >> 2012 >> TL Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> HANDSFREELINK System >> Control Unit Input Test >> Without Navigation

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  1. Remove the HandsFreeLink Control Unit .
  2. Inspect the connector (A) and socket (B) terminals for a good pinfit 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 3.
    Fig 1: Identifying Connector And Socket Terminals
    G08071974Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. 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 4.
    Cavity Wire Color Test Condition Test: Desired Result Possible Cause if Desired Result is not Obtained
    1 BLK Ignition switch in ACCESSORY (I) or ON (II), or the engine start/stop button to ACC mode or ON mode Measure the voltage to body ground:
    There should be less than 0.2 V.
    • Poor ground (G501)
    • An open or high resistance in the wire
    15 WHT Under all conditions Measure the voltage to body ground:
    There should be battery voltage.
    • Blown No. 15 (10 A) fuse in the under-hood fuse/relay box
    • An open in the wire
    16 PUR Ignition switch in ACCESSORY (I) or ON (II), or the engine start/stop button to ACC mode or ON mode Measure the voltage to body ground:
    There should be battery voltage.
    • Blown No. 18 (7.5 A) fuse in the driver's under-dash fuse/relay box
    • An open in the wire
  4. Disconnect the 28P connector again, and make this input test at the connector.
    • If the test indicates a problem, find and correct the cause and check for B-CAN related DTCs, then recheck the system.
    • If the input test proves OK, the HandsFreeLink Control Unit is faulty, replace it.
Cavity Wire Color Test Condition Test: Desired Result Possible Cause if Desired Result is not Obtained
17 BLU Passenger's under-dash fuse/relay box connector D (28P) disconnected Check for continuity between terminal No. 17 and passenger's under-dash fuse/relay box connector D (28P) terminal No. 8:
There should be continuity.		 An open in the wire
18 PNK Passenger's under-dash fuse/relay box connector D (28P) disconnected Check for continuity between terminal No. 18 and passenger's under-dash fuse/relay box connector D(28P) terminal No. 7:
There should be continuity.		 An open in the wire
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