headrest MAZDA MX-5 1994 User Guide

J-2 I AUOIO SYSTEM (TYPE-3) HEADREST SPEAKER BOOY SONIC WCi%l SPEAKER OAIVER SIDE -01 AUOIO WIT (I) 114 1K 1N 1L tJ 1H IF ID 1s PASSENGER SIOE -1 J-02 AUTO LEVEL CONTROLLER (I1 2J 3 ZJA -05 OOOR SPEAKER J-06 HEADREST SPEAKER AND BOOY SONIC(R) IJ-O~ HEADREST SPEAKER AND BODY SONIC(F2) I J-a NETWORK LH (DR1) (WOOFER1 RH (OR21 -10 DOOR SPEAKER (TWEETER) LH (ORI) J-09 NETWORK RH (OR21 J-03 AUTO LEVEL CONiROLLER (I) 3[)3c%U J-04 DOOR SPEAKER (WOOFER) LH (OAl) I J-11 WOR SPEAKER (TWEETER) RH (OR21 J-12 AM10 WIT r&Tl 1J M5 4)- Gartner Banana

AUDIO T Symptom: Speaker(s) do not operate (Without headrest speakers.) I L/ Possible cause Antitheft system activated Damaged audio unit Open circuit in wiring harness Poor connection of connector Damaged speaker Step 1 Check if the antitheft system has been activated. Turn the ignition switch to ACC and note the display. - - - Display CODE flashes Step 2 1. Remove the audio unit. (Refer to page T-145.) 2. Check the connections of the ground wire and the short plug. 3. If a connection is poor or loose, repair or replace it. 4. If the connections are OK, go to Step 3. Action Deactive antitheft system (page T-120) and go to step 2 Err flashes Clock No indication Step 3 1. Turn the ignition switch to ACC. 2. Measure the voltage at the following terminal-wires of the audio unit connector. B+: Battery positive voltage Have audio unit changed at a Panasonic service company Go to Step 4 Go to Ste~ 2 Terminal I Voltage I Action I B+ I Check C (UR) terminal 1 I 1, - I B+ I Redace audio unit I 1- Check ROOM 10A fuse (UR) I Other 1 If ROOM 10A fuse is OK, repair wiring harness 1 . . Check CIGAR 15A fuse If CIGAR 15A fuse is OK, repair wiring harness (CIGAR 15A fuse - Audio unit) A I I (ROOM 10A fuse - Audio unit) - I I Other Gartner Banana

AUDIO T Step 7 1. Disconnect the audio unit connector (12-pin). 2. Check for continuity between the audio unit connector and door speaker connector. M (VY) 1 2-pin tc B (WG) 2-pin Right door N (L) 12-pin ++ A (RAN) 2-pin K (WG) 12-pin ++ B (WG) P-pin Left door L [WWI 124n tc A IWW) 241 Spaker 3. If correct, replace the audio unit. 4. If not as specified, repair the wiring. Audio connector rp Symptom: Speaker(s) do not operate (With headrest speakers.) I 'peaker I Continuity I connector Possible cause Antitheft system activated Damaged audio unit - Open circuit in wiring harness GROUND WIRE Poor connection of connector Damaged speaker Step 1 Check if the antitheft system has been activated. Turn the ignition switch to ACC and note the display. Display CODE flashes Step 2 1. Remove the audio unit. (Refer to page T-145.) 2. Check the connections of the ground wire and the short plug. 3. If a connection is poor or loose, repair or replace it. 4. If the connections are OK, go to Step 3. Action Deactive antitheft system (page T-120) and go to step 2 Err flashes Clock No indication Have audio unit changed at a Panasonic service company Go to Step 4 Go to Step 2 Gartner Banana

T AUDIO Step 3 1. Turn the ignition switch to ACC. 2. Measure the voltage at the following terminal-wires of the audio unit connector. d B+: Battery positive voltage Action 1 rerminal Voltage + Check C (UR) terminal I Check CIGAR 15A fuse If CIGAR 15A fuse is OK, repair wiring harness (CIGAR 15A fuse - Audio unit) I A (uB) I Other If ROOM 10A fuse is OK, repair wiring harness (ROOM 10A fuse - Audio unit) Step 4 Locate the faulty speaker(s) by using the headrest speaker volume, and balance control. 1. Turn the ignition switch to ACC. 2. Play a prerecorded tape, and set the volume to the ten- ter position. .- 3. Set the head restraint speaker volume, and balance controls as shown in Table 2. Check operation of each speaker. 4. From results of Table 2 testing, go to the next step. I BALANCE CONTROL 45UOTX-246 Table 2 Judgement I Next Step I Speaker Left door I Left I Min Head restraint Speaker Ispeaker volume / operates Left door speaker circuit OK - Left door speaker circuit faultv 1 Step 5 Right door speaker circuit OK - Rinht door weaker circuit faultv Ste~ 5 (driver seat) faultv Step 8 Right door Left headrest (Driver seat) ---- Right headrest speaker circuit - (driver seat) OK Right headrest speaker circuit (driver seat) faultv Step 8 Right - Right headrest (Driver seat) Left headrest speaker circuit Left headrest (Passenger seat) Min Max - Max Yes No Yes No Right headrest (Passenger seat) Max 1 Max Yes I (passenger seat) OK I Right headrest speaker circuit bassenaer seat) faultv Gartner Banana

AUDIO Step 5 1. Remove the faulty door speaker cover and speaker installation screws. 2. Check if the speaker is properly connected. 3. If necessary, repair or reconnect the connector 4. If the connection is OK, go to Step 6. Step 6 1. Disconnect the connector from the suspected faulty speaker. 2. Measure resistance between terminals of the speaker. Resistance: 4fi 3. If not as specified, replace the speaker. 4. If the resistance is OK, go to Step 7. Step 7 1. Disconnect the audio unit connector (1 2-pin). 2. Check for continuity between the audio unit connector and door speaker connector. Audio I 'paker I connector 'Peaker I Continuity I I connector 3. If correct, replace the audio unit. 4. If not as specified, repair the wiring. Right door Left door Step 8 1. Check if the headrest speaker connector is properly con- nected. 2. If necessary, repair or reconnect the connector. 3. If the connection is OK, go to Step 9. 05UOTX-262 I M (LIY) 12-pin * B (RIG) 2-pin N (L) 12-pin t, A (WW) 2-pin K (RIG) 12-pin * B (WG) 2-pin L (RMI) 12-pin u A (RAN) 2-pin Yes Yes Yes Yes Gartner Banana

T AUDIO Step 9 1. Disconnect the headrest speaker connector. 2. Measure resistance between terminals of the headrest speaker connector as shown. i/ 3. If not as specified, replace the speaker. 4. If the resistance is OK, go to Step 10. Terminal A-B C-D Step 10 1. Disconnect the audio unit connector (Spin). 2. Check for continuity between the audio unit connector and headrest speaker connector (&pin). Resistance 4n Audio I 'paller I connector 'Peaker 1 continuity I I connector I Right headrest 3. If correct, replace the audio unit. 4. If not as specified, repair the wiring. Left headrest H (LiW) 8-pin tt C (VW) win B (UO) 8-pin t, D (UO) &pin Yes Yes F (R/L) 8-pin +t B (WL) 6-pin A (WY) 8-pin t* A (WY) Gpin Yes Yes Gartner Banana

T AUDIO Symptom: Some speakers do not operate 1 Possible cause Damaged speaker Damaged audio unit Damaged DIN cord Open or short circuit in wiring harness Poor connection of connector Open or short circuit in DIN cord 45UOTX-260 Step 1 1. Turn the ignition switch to ACC. 2. Turn the audio system power to ON. Play a recorded tape and set the volume at an appropriate level. 3. Verify speaker operation with the balance, treble, bass, and fader knobs in the positions indicated in Table 1. 4. If not as specified in Table 1, refer to Table 2 and continue troubleshooting at the step corresponding to the faulty speaker. 35UOTX-082 Table 1 1 Speaker Balance I Treble I Left door (woofer) I Right I ( Right door (woofer) I I Left door (tweeter) I Right I Right door (tweeter) Right Driver-side left headrest Right . I Passenger-side left headrest I Right I Driver-side right headrest Left Bass Passenger-side right headrest Right Left Fader I Speaker operates I Yes Right 1-1 I No Yes I Left Yes Table 2 Gartner Banana

AUDIO T Step 10 1. Check for continuity between the network connector (4-pin) and the AM-FM radio unit connecter (12-pin). Network I 'peaker I connector 'Waker 1 Continuity I I connector I I 35UOTX-093 2. If correct, redace the network. Right door Left door 3. If not as specified, repair the wiring. Step 11 1. Remove the headrest speaker. (Refer to page T-147.) 2. Make sure the speaker is properly connected. 3. If the connections are OK, go to Step 12. 4. If a connection is poor, repair it. I A (WG) 4-pin t, M (VY) 12-pin B (W) 4-pin ++ N (L) 12-pin A (WG) *in ++ K (WG) 1 2-ph B (WW) 4-pin tt L (WW) 1 P-pin Step 12 1. Disconnect the headrest speaker connector. 2. Measure the resistance between the terminals of the headrest speaker connector. Yes Yes Yes Yes Resistance Actlon 8Q Go to Step 13 Step 13 1. Remove the audio unit. (Refer to page T-145.) 2. Make sure the audio unit connector and DIN cord are properly connected. 3. If the connections are OK, go to Step 14. 4. If a connection is poor, repair it. Gartner Banana

T AUDIO Step 14 1. Turn the ignition switch to ACC. 2. Measure the voltage at terminal C (UB) of the auto level controller connector (&pin). .J B+: Battery positive voltage I voltage Action Step 15 1. Disconnect the auto level controller DIN cord (&pin). 2. Measure the voltage at terminal 2 of the DIN cord. B+ Other Go to Step 15 Repair wiring harness CIGAR fuse - Auto level controller B+: Battery positive voltage Step 16 1. Check for continuity between the auto level controller connector (&pin) and the headrest speaker and body- sonic connector (&pin). Voltage B+ Other Action Go to Step 16 Replace AMFM radio unit 2. If correct, replace the auto level controller. 3. If not as specified, repair the wiring. I Speaker Right headrest Left headrest ALC I 'peaker connector connector H (VW) 8-pin +t C (LMI) 6-pin B (UO) &pin ++ D (LO) 6-pin F (RIL) &pin o B (RIL) Gpin A (W) &pin o A (W) 6-pin continuity Yes Yes Yes Yes .- / Gartner Banana

AUDIO T Symptom: Bodysonic will not play Possible cause Damaged bodysonic Damaged audio unit Damaged DIN cord Open or short circuit in wiring harness Poor connection of connector Open or short circuit in DIN cord 45UOTX-269 Step 1 1. Remove the audio unit. (Refer to page T-145.) 2. Make sure the audio unit connector and DIN cord are properly connected. 3. If the connections are OK, go to Step 2. 4. If a connection is poor, repair it. Step 2 1. TI~ the ignition switch to ACC. .. .-... 2. Measure fhe voltage at terminal C (UB) of the auto level controller connector (8-pin). B+: Battery positive voltage Step 3 1. Disconnect the auto level controller DIN cord (6-pin). Voltage B+ Other 2. Measure the voltage at terminal 2 of the DIN cord. Action Go to Ste~ 3 J Repair wiring harness (CIGAR fuse - Auto level controller) B+: Batterv ~ositlve voltage I Other I Replace AMaFM radio unit . . - Step 4 1. Make sure headrest speaker and bodysonic connectors are properly connected. 2. If the connections are OK, go to Step 5. 3. If a connection is poor, repair it. Voltage B+ Action Go to Stea 4 Gartner Banana