1994 MAZDA MX-5 audio

T AUDIO Symptom: Compact disc will not load Possible cause Damaged compact disc Ll' Damaged CD player Note The CD player automatically ejects dirty or damaged discs. Step 1 1. Check if a known good compact disc will load. 2. If the compact disc will load, the system is OK. 3. If the compact disc will not load, go to Step 2. Step 2 1. Check if the radio operates normally. 2. If the radio operates normally, replace the audio unit. 3. If the radio does not operate there is defective in the power supply circuit. I I 35UOTX-074 Symptom: Compact disc skips Possible cause Damaged compact disc Damaged CD player Remedy 1. Check with the driver if skipping occurs often. 2. If it occurs often, check that the audio unit is properly installed. (1) If the audio unit is not installed properly, remedy it. (2) If the audio unit is installed properly, replace the audio unit. 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

AUDIO T Step 2 1. Remove the door speaker (woofer). (Refer to page T-146.) 2. Make sure the speaker is properly connected. 3, If the connections are OK, go to Step 3. 4. If a connection is poor, repair it. Step 3 1. Disconnect the connector from the suspected faulty door speaker. 2. Measure the resistance between the terminals of the door speaker (woofer). Step 4 1. Remove the audio unit. (Refer to page T-145.) 2. Make sure the audio unit connectors are properly con- Resistance 4Q Other nected. 3. If the connections are OK. ao to Step 5. Action Go to Step 4 Replace speaker 4. If a connection is poor, rep& it. 1. 6heck for continuity between the AM-FM radio unit con- nector (1 2-pin) and the door speaker (woofer) connec- tor (2-pin). Radio r 'Laker I connector I connector Right door 2. If correct, replace the AM-FM radio unit. 3. If not as specified, repair the wiring. Left door ~ ~ I M ((VV 12-pin tr B (WG) 2-pin N (L) 12-pin +t A (RMI) 2-pin Yes Yes K (RIG) 12-pin tr B (RIG) 2-pin L (WW) 12-pin o A (RNV) 2-pin Yes Yes Gartner Banana

T AUDIO Step 6 1. Remove the door speaker (tweeter). (Refer to page T-146.) 2. Make sure the speaker is properly connected. 3. If the connections are OK, go to Step 7. 4. If a connection is poor, repair it. Step 7 1. Disconnect the connector from the suspected faulty door speaker. 2. Measure the resistance between the terminals of the door speaker (tweeter). Step 8 1. Remove the audio unit. (Refer to page T-145.) 2. Make sure the audio unit connectors are properly con- nected. 3. If the connections are OK, go to Step 9. 4. If a connection is poor, repair it. Resistance 9R Other Step 9 1. Check for continuity between the network connector (4-pin) and the door speaker (tweeter) connector (2-pin). Action Go to Step 8 Replace speaker Network I 'paller I connector 'peaker I Continuity I I connector 2. If correct, go to Step 10. 3. If not as specified, repair the wiring. Right door Left door I C (UR) &pin tt A (UR) 2-pin D (BIL) &pin tt B (BIL) 2-pin C (UR) &pin tt A (UR) 2-pin D (BIL) 4-pin tt B (BIL) 2-pin Yes Yes Yes Yes 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