Honda Fit: Hands Free Link Control Unit Input Test/Replacement

With navigation

1. Remove the driver's dashboard undercover.

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

1. 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.

1. 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).

1. 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.

1. 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