( TL19E00J14235030581FDAT00 )

HFT Control Unit Input Test/Replacement

1. Remove the passenger's dashboard undercover.

1. Disconnect the 28P connector (A) from the Hands Free Telephone 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.
   - 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 5 .

   Cavity | Wire | Test condition | Test: Desired result | Possible cause if result is not obtained
   --- | --- | --- | --- | ---

   1

   BLK

   Under all conditions

   Measure the voltage to ground: There should be less than 0.5 V.

   - Poor ground (G401)
   - An open in the wire

   15

   WHT

   Under all conditions

   Measure the voltage to 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 ACC (I) or ON (II)

   Measure the voltage to 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

1. Disconnect the 28P connector again, and make this input test at the connector.
   - If the test indicates a problem, find and correct the cause, then recheck the system.
   - If the input test proves OK, the HandsFreeLink control unit is faulty, replace it.

   Cavity | Wire | Test condition | Test: Desired result | Possible cause if result is not obtained
   --- | --- | --- | --- | ---
   17 | BLU | Under all conditions | Check for continuity between No. 17 terminal and the passenger's under-dash fuse/relay box connector D (28P) No. 8 terminal: There should be continuity. | An open in the wire
   Passenger's under-dash fuse/relay box connector D (28P) disconnected | Check for continuity to ground: There should be no continuity. | Short to ground
   18 | PNK | Under all conditions | Check for continuity between No. 18 terminal and the passenger's under-dash fuse/relay box connector D (28P) No. 7 terminal: There should be continuity. | An open in the wire
   Passenger's under-dash fuse/relay box connector D (28P) disconnected | Check for continuity to ground: There should be no continuity. | Short to ground