fuse MAZDA MX-5 1994 Repair Manual

CRUISE CONTROL SYSTEM T Inspection Procedure Self-diagnosis 1. Connect a 1.4W test light between terminals D and F, of the cruise control unit connector. Note There is no wire in terminal D of the connector. Push the test light through the connector and touch the cor- responding pin on the control unit. 2. Turn the ignition switch to ON. 3. Turn the cruise control on by pressing the MAlN switch. The MAlN indicator light will come on. 4. Press and hold the RESUMEIACCEL switch for more than 3 seconds. The test light will illuminate for 3 se- conds and go out for 2 seconds. 5. The on-board diagnosis system is activated and the test light will flash if there is a problem. Refer to the chart be- low to obtain the problem code number. Note The cruise control system will not operate in self-diag- nosis mode. 6. After retrieving the code(s), drive the vehicle at more than 16 kmlh (10 MPH) or press the MAlN switch to deactivate self-diagnosis. The MAlN indicator light will go off. 7. Follow the action corresponding to the problem code. Service Code Table If there are two or more problems in the system, the problem with the highest priority will be indicated. Priority Pattern of output signal ON 2 OFF n 4 OFF ON 5 OFF I No. Code I Possible cause Defective wiring (Cruise actuator- Cruise control unit, Stoplight switch-Cruise control unit) 01 Defective actuator Defective stoplight switch (For O5 1 Defective wiring (Fuse - Cruise control unit) Both stoplight and brake switch (for 07 vehicle and cruise) are ON simulta- neously Defective SETICOAST, or RESUMEIACCEL switch l5 1 Defective cruise control unit Action Repair harness lnspect actuator (Refer to page T-107) Inspect brake switch (Refer to page T-105) Replace fuse Repair harness Inspect stoplight and brake switch (Refer to pages T-105 and T-56) Inspect cruise control switch (Refer to page T-106) Go to troubleshooting Gartner Banana

CRUISE CONTROL SYSTEM T BRAKE AND STOPLIGHT SWITCH CLUTCH SWITCH Removal Loosen the locknut and remove the switch. Installation Install in the reverse order of removal. Adjustment Adjust the switch to set the specified pedal height. Pedal height: 175--185mm (6.89-7.82 in) Pedal free play: 0.6-3.lmm (0.02-4.12 in) Inspection 1. Disconnect the clutch switch connector. 2. Check for continuity between terminals of the switch. Pedal position Terminal A B 1 0-a: Continuity Pedal released 3. If not as specified, replace the clutch switch. Pedal de~ressed STOP LIGHTIBRAKE SWITCH Removal Loosen the locknut and remove the switch. 0 I 0 Installation Install in the reverse order of removal. Adjustment Adjust the switch to set the specified pedal height. Pedal height: l7l-l8l mm (6.93--7.13 in) Pedal free play: 4.0-7.0mm (0.16-0.28 in) Inspection 1. Disconnect the brake switch connector. 2. Check for continuity between terminals of the switch. I I I Pedal released I I I Pedal position w: Continuity Terminal Pedal depressed 3. If not as specified, replace the brake switch. 4. If the switch is OK, repair the wiring harness (fuse - brake switch - control unit). A 0 I 0 B Gartner Banana

AUDIO Name ;can button 3epeat button rrack search button Press SCAN button and beginning of tunes are played one by one (10 seconds for each) Press button during playback and scanning starts from next tune Press button during scanning and tune being scanned is played Scanning is canceled automatically when all programs in disc have been scanned Illustration Press RPT button during a tune is playing to play it repeatedly Press again to cancel repeat operation and resume normal playback Operation Press button to search for beginning of next or current program 1. PressA(up) button for less than 0.5 second during disc play and be- ginning of next tune is selected and played Tunes are changed one by one with each press of button When pressed during play of last tune, first tune is replayed 2. PressV(down) button for less than 0.5 second during disc play and current tune is replayed from beginning Tunes are changed one by one with each press of button When pressed during play of first tune, last tune is replayed Press button to fast forwardheverse disc 1. Press and hold FF (up) button for more than 0.5 second and disc play position moved ahead at high speed while button pressed When last part of last tune is reached, first tune is selected and disc stops 2. Press and hold REV (down) button for opposite operation of FF button When first part of first tune reached, disc stops reversing and starts playing Clock The clock can be set while the radio or tape/CD player is ON. Illustration Clock button (clock display) HIM button (clock setup) 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, nn Gartner Banana

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

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 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 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