HFL Switch/HFL-Voice Control Switch Does Not Work

Turn the ignition switch OFF.
Do the HFL switch/HFL-voice control switch test (see HFL SWITCH/HFL-VOICE CONTROL SWITCH TEST/REPLACEMENT ).
Is the switch OK?
1. YES - Go to step 3.
2. NO - Replace the HFL switch or HFL-voice control switch (see HFL SWITCH/HFL-VOICE CONTROL SWITCH TEST/REPLACEMENT ).
Remove the steering column covers (see STEERING COLUMN REMOVAL AND INSTALLATION ).
Disconnect the 13P connector from the cable reel.
Remove the roof console (see FRONT INDIVIDUAL MAP LIGHT TEST ).
Disconnect the HandsFreeLink control unit 22P connector.
Turn the ignition switch ON (II).
Check for voltage between the HandsFreeLink control unit 22P connector No. 2 terminal and body ground.

Fig 1: Checking Voltage Between HandsFreeLink Control Unit 22P Connector Terminal 2 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?
1. YES - Repair a short to ground in the wire.
2. NO - Go to step 9.
Turn the ignition switch OFF.
Check for continuity between the HandsFreeLink control unit 22P connector No. 2 terminal and body ground.

Fig 2: Checking Continuity Between HandsFreeLink Control Unit 22P Terminal 2 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?
1. YES - Repair a short to ground in the wire.
2. NO - Go to step 11.
Check for continuity between the HandsFreeLink control unit 22P connector No. 2 terminal and the cable reel 13P connector No. 8 terminal.

Fig 3: Checking Continuity Between HandsFreeLink Control Unit 22P Connector Terminal 2 And Cable Reel 13P Connector Terminal 8
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?
1. YES - Go to step 12.
2. NO - Repair an open in the wire.
Remove the audio unit (see AUDIO UNIT REMOVAL/INSTALLATION ).
Disconnect the audio unit connector A (20P).
Check for continuity between the cable reel 13P connector No. 3 terminal and the audio unit connector A (20P) No. 11 terminal.

Fig 4: Checking Continuity Between Cable Reel 13P Connector Terminal 3 And Audio Unit Connector A (20P) Terminal 11
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?
1. YES - Check for an open or a short in the HFL switch or HFL-voice control switch harness. If OK, check for loose or poor connections at the audio unit, HandsFreeLink control unit, cable reel, and HFL switch or HFL-voice control switch connector. If the connections are OK, substitute a known-good HandsFreeLink control unit. If the problem is gone, replace the original HandsFreeLink control unit.
2. NO - Repair an open in the wire.