Honda Fit Quiz
Second generation (2007-2026)

Hands Free Link Control Unit Input Test/Replacement

In this manual: Second generation (2007-2026)
First generation (2001–2008) — 118Second generation (2007-2026) — 923
8steps
~48min
2/5difficulty
Done 0 of 8

With navigation

  1. Remove the driver's dashboard undercover.

  2. Disconnect the 32P connector (A) from the HandsFreeLink control unit (B).

  3. Inspect the connector and socket 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 4.

  4. Reconnect the connector and make these input tests at the connector under the test conditions listed.

    • If any test indicates a problem, find and correct the cause, then recheck the system.

    • If all the input tests prove OK, go to 5.

    Cavity

    Wire color

    Test condition

    Test: Desired result

    Possible cause if desired result is not obtained

    1

    BLK

    Under all conditions

    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

    17

    PNK

    Under all conditions

    Measure the voltage to body ground:

    There should be battery voltage.

    • Blown No. B1 (15 A) fuse in the under-dash fuse/relay box

    • An open or high resistance in the wire

    18

    ORN

    Ignition switch in ACCESSORY (I) or ON (II)

    Measure the voltage to body ground:

    There should be battery voltage.

    • Blown No. B14 (7.5 A) fuse in the under-dash fuse/relay box

    • An open or high resistance in the wire

  1. Disconnect the 32P connector again, and make this input test 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, the HandsFreeLink control unit must be faulty; replace it.

    Cavity

    Wire color

    Test condition

    Test: Desired result

    Possible cause if desired result is not obtained

    4
    ·
    5

    YEL
    ·
    GRN

    Disconnect the audio-navigation unit connector C (14P)

    Check for continuity to ground:

    There should be no continuity.

    Short to body ground in the wire(s)

    4
    ·
    5
    ·
    21

    YEL
    ·
    GRN
    ·
    GRY

    Under all conditions

    Check for continuity between No. 4 and No. 5, No. 4 and No. 21, and No. 5 and No. 21 terminals individually:

    There should be no continuity.

    A short in the wires

    Disconnect the audio-navigation unit connector C (14P)

    Check for continuity between No. 4 terminal and audio-navigation unit connector C (14P) terminal No. 9, No. 5 terminal and audio-navigation unit connector C (14P) terminal No. 10, and No. 21 terminal and audio-navigation unit connector C (14P) terminal No. 3 individually:

    There should be continuity.

    An open in the wire(s)

Without navigation

  1. Remove the driver's dashboard undercover.

  2. Disconnect the 28P connector (A) from the HandsFreeLink control unit (B).

  3. Inspect the connector and socket 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 4.

  4. Reconnect the connector and make these input tests at the connector under the test conditions listed.

    • If any test indicates a problem, find and correct the cause, then recheck the system.

    • If all the input tests prove OK, go to 5.

    Cavity

    Wire color

    Test condition

    Test: Desired result

    Possible cause if desired result is not obtained

    14

    BLK

    Under all conditions

    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

    PNK

    Under all conditions

    Measure the voltage to body ground:

    There should be battery voltage.

    • Blown No. B1 (15 A) fuse in the under-dash fuse/relay box

    • An open or high resistance in the wire

    16

    ORN

    Ignition switch in ACCESSORY (I) or ON (II)

    Measure the voltage to body ground:

    There should be battery voltage.

    • Blown No. B14 (7.5 A) fuse in the under-dash fuse/relay box

    • An open or high resistance in the wire

  1. Disconnect the 28P connector again, and make this input test 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, the HandsFreeLink control unit must be faulty; replace it.

    Cavity

    Wire color

    Test condition

    Test: Desired result

    Possible cause if desired result is not obtained

    18

    ORN

    Under all conditions

    Check for continuity between No. 18 terminal and the under-dash fuse/relay box connector Q (16P) terminal No. 3:

    There should be continuity.

    An open in the wire

    Disconnect these items:

    • Under-dash fuse/relay box connector Q (16P)

    • Gauge control module 32P connector

    • Immobilizer-keyless control unit 7P connector

    Check for continuity to ground:

    There should be no continuity.

    Short to body ground in the wire

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