audio MAZDA MX-5 1994 Service Manual

AUDIO Clock The clock can be adjusted during radio, tape, or CD play. I Name I Illustration Clock button (clock display) ALC (Auto level controller) Name 1 Illustration ALCJbodysonic volume control knob I Mute button Roof mode button I Stereo-wide button Operation Press button to display present radio frequency or operation mode If power supply to unit is broken (burnt fuse or disconnected battery), clock setup will be canceled When clock button is pushed for 2 seconds, clock display flashes. At this point, press H button to advance hours and M button to advance minutes Press clock button again to return to normal display If clock button is pressed again while clock display is flashing and time has not been adjusted (that is, H and M buttons have not been pressed), min- utes will be set at :00. If time before adjustment showed 30-59 minutes, time will be set at next hour For example, Operation Press knob to turn ALC on or off 1. At ON, ALC adjusts sound corresponding to vehicle speed; ALC indica- tor light turns on 2. To adjust seat vibration, turn knob to right or left Right -t Seat vibration increases Left + Seat vibration decreases Turn knob right or left to transfer sound Right -+ Door speakers Left -t Headrest speakers Press button to lower overall volume by 10dB Press button to switch between roof-open mode and roof-closed mode; sound quality is adjusted depending on whether roof is opened or closed Press button to turn stereo-wide function on or off At ON, stereo-wide mode improves sound quality Gartner Banana

T AUDIO ANTITHEFT SYSTEM Alarm Conditions If the antitheft system protection has been activated, any one of the following conditions will trigger the sys- tem: .--' Disconnected battery cable Discharged battery Disconnected audio unit connectors. If the system is triggered, the audio unit will then be inoperative when it is reconnected to a power source, and "code" will flash on the display until the preselected code number is input. Follow the procedures in "Canceling Antitheft Operation" (page T-110) to deactivate the unit. Setting the Code Number 1. Turn the audio unit off with the ignition switch at ACC. 2. Push REW and FF simultaneously for approximately 2 seconds until "code" is displayed. 3. Push REW and FF together again within 10 seconds un- til bars appear on the display. 4. Select a personal code number and record it before in- putting it. If the number is input and then forgotten, it can- not be canceled, and if the unit is disconnected again, the audio unit will be inoperati. .-/ 5. Use channel buttons 1-4 to input the selected code number. Press 1 for the first digit, 2 for the second, 3 for the third, and 4 for the last digit. If the display is deleted, repeat the procedure from step 1. 6. With the code number displayed, press and hold REW and FF for approximately 2 seconds until a beep is heard and "code" begins to flash. 7. After approximately 5 seconds, the display will change to time. This indicates the system is set. Gartner Banana

AUDIO T Canceling The Code Number 1. Turn the ignition switch to ACC and then turn off the au- dio unit. 2. Press REW and FF simultaneously for approximately 2 seconds until "code" is displayed. 3. Press REW and FF again until bars appear on the dis- play. 4. Use channel buttons 1-4 to input the current code num- ber. Press 1 for the first digit, 2 for the second, 3 for the third, and 4 for the last digit. 5. With the code number on the display, press and hold REW and FF for approximately 2 seconds until a beep is heard. "Code" will be displayed for approximately 5 se- conds. After it disappears, the code number is canceled. 6. If "ErrW(error) appears on the display, repeat the proce- dure from step 1. To Deactivate Antitheft System Canceling Antitheft Operation 1. Push REW and FF until bars are displayed. 2. Use channel buttons 1-4 to input the current code num- bers. Press 1 for the first digit, 2 for the second, 3 for the third, and 4 for the last digit. Gartner Banana

AUDIO 3. Press and hold REW and FF for approximately 2 se- conds until a beep is heard. "Code" will be displayed for approximately 5 seconds and then disappear to indicate that the audio unit is operative. -.- Caution Three consecutive errors, including turning the ignition switch to OFF and disconnecting the au- dio unit, will activate the antitheft system and ren- der the audio unit completely inoperative. If this occurs, contact Panasonic 4. If "Err" (error) appears, repeat the procedure from step 1. TROUBLESHOOTING Before troubleshooting, verify that the customer is using the audio system correctly. If not, advise the customer of the proper operating procedures. (Refer to page T-108.) TY pe 1 1. Speaker(s) do not operate (without headrest speakers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page T-125 -, 2. Speaker(s) do not operate (with headrest speakers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page T-127 TY pe 2 1. No sound can be heard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page T-137 2. Some speakers do not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page T-138 3. Bodysonic will not play . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page T-143 Type 1 and Type 2 1. Poor sound quality or noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page T-131 2. Poor sound quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page T-133 3. Cassette tape will not load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page T-134 4. Cassette tape will not play . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page T-135 5. Compact disc will not load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page T-136 6. Compact disc skips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page T-136 45UOTX-236 Gartner Banana

AUDIO T Circuit Diagram TYPE 1 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

T AUDIO BALANCE CONTROL 45UOTX-24' Table 1 Step 4 Locate the faulty speaker(s) by using the balance control. 1. Turn the ignition switch to ACC. 2. Play a prerecorded tape, and set the volume to the cen- ..-, ter position. 3. Set the balance control as shown in Table 1. 4. Check operation of each speaker. 5. From results of Table 1 testing, go to the next step. maker I Balance I Left door I Left Speaker operates Yes Right door Yes Right Judgement Left door speaker circuit OK Next Step - Left door speaker circuit faulty Right door speaker circuit OK 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 5 - Right door speaker circuit faulty Step 6 1. Disconnect the connector from the suspected faulty speaker. 2. Measure resistance between terminals of the speaker. Resistance: 4R 3. If not as specified, replace the speaker. 4. If the resistance is OK, go to Step 7. Step 5 J OSUOTX-254 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