Control Unit Input Test
WARNING: This page is about a different car, the 2011 Acura TL, 2010 Acura TL, and 2009 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.
- Remove the HandsFreeLink control unit (see HFL SWITCH TEST )
- 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
- 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 4TEST CONDITION REFERENCE CHART
Cavity Wire Test condition Test Desired result Possible cause if desired result is not obtained 1 BLK Under all conditions Measure the voltage to ground There should be less than 0 2V - Poor ground (G501)
- An open or high resistance in the wire
15 WHT Under all conditions Measure the voltage to ground There should be battery voltage - Blown No 15(10A) 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 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
- 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 itTEST CONDITION REFERENCE CHART
Cavity Wire Test condition Test Desired result Possible cause if desired result is not obtained 17 BLU Under all conditions Check for continuity between No 17 terminal and passenger's under-dash fuse/relay box connector D (28P) No 14 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 passenger's under-dash fuse/relay box connector D (28P) No 13 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