ignition MAZDA MX-5 1994 Workshop Manual

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 I Symptom: No sound can be heard I Possible cause Burnt CIGAR fuse Burnt ROOM fuse Damaged audio unit ROOM 1 OA 35UOTX-077 Open circuit in wiring harness Poor connection of connector Damaged DIN cord Step 1 Check the CIGAR 15A fuse and ROOM 1 OA fuse in the fuse block. I Fuse 1 Action I Step 2 1. Remove the audio unit. (Refer to page T-145.) 2. Check the connectors and the DIN cord of the audio unit. 3. If a connection is poor or loose, repair or replace it. 4. If the connectors are OK, go to Step 3. Burnt OK Step 3 1. Turn the ignition switch to ACC position. 2. Measure voltage at terminals A (UB) and C (UR) of the AM-FM radio unit connector (1 2-pin). Replace fuse after checking and repairing wiring harness Go to Step 2 B+: Battery positive voltage Terminal 1 Voltfe Action Measure terminal C (VR) voltage Repair wiring harness (CIGAR fuse - AMeFM radio unit) Go to Step 4 Repair wiring harness (ROOM fuse - AM-FM radio unit) 1 Step 4 1. Check for continuity between body of the AM-FM radio unit and ground. I No Repair wiring harness (AM-FM radio unit - GND) 1 Continuity Yes Action Replace audio unit 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

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

Ix-osl, FUSE ANTENNA BLOCK 1OA 8 R/B J-3 MAIN FUSE BLOCK .POWER ANTENNA MAIN IGNITION m SWITCH L~W PMR ANTENNA MOTOR BR I I T Y w -13 REAR [R) -POHER ANTENNA ASSEMBLY J-14 POWER ANTENNA RELAY I I I Gartner Banana

T AUDIO / SNAP-RING OUN TlNG NUT BROKEN Antenna Mast Removal / Installation 1. Using snap-ring pliers, remove the mounting nut. 2. With the ignition switch at ACC or ON, turn the radio switch on, and pull out the antenna mast. Check the end of the plastic rack for damage. If the rack end is kinked or broken, replace the motor. 3. With the ignition switch at ACC or ON and the radio on, feed the rack of the new mast into the motor with toothed side facing toward the front of the vehicle. Turn the radio off. While the motor is retracting the rack, feed the mast into the motor. 4. Reinstall the mounting nut. 5. With the ignition switch at ACC or ON, turn the radio on and off a few times and check to see that the antenna op- erates smoothly. Gartner Banana

SRS AIR BAG SYSTEM L Possible cause Defective air bag module(s) Defective clock spring Defective S-sensor Defective D-sensor Defective diagnostic Defective wiring harness Step 1 Carry out "Before Servicing" procedure under GENER- AL PROCEDURES, page T-160. Service Code 13 Flowchart No.3 Step 2 1. Connect the negative battery cable. 2. Turn the ignition switch ON and check the service code. Symptom Step 3 Service code 13 Other Warning Handling the air bag module improperly can acci- dently deploy the air bag, which may seriously in- jure you. Read SERVICE WARNINGS, page T-159, before handling the air bag module. Action Go to Step 5 Go to Step 3 1. Turn the ignition switch to LOCK. 2. Disconnect the negative battery cable. 3. Remove the driver-side air bag module. (Refer to page T-206.) 4. Connect the blue and orange clock spring connectors. 5. Connect the negative battery cable. 6. Turn the ignition switch to ON and check the service code. I Service code I Action 1 13 Other Replace combination switch (Refer to page T-19) Go to step 4 Gartner Banana