1994 MAZDA MX-5 AIR BAG

BODY ELECTRICAL SYSTEM ................................... INDEX T- 2 ........................... SWITCHES T- 2 FUSES AND RELAYS .................. T- 3 .............................. LIGHTS T- 4 CRUISE CONTROL SYSTEM ........... T- 5 ...................... AUDIO SYSTEM T- 6 SRS AIR BAG SYSTEM ................ T- 7 ............................... OUTLINE T- 8 TROUBLESHOOTING GUIDE ........... T- 8 ELECTRICAL SYMBOLS ............... T- 9 ................................... FUSE T- 10 STRUCTURAL VIEW ................... T- 10 ...................... SPECIFICATIONS T- 11 ........................ DESCRIPTION T- 12 ....................... REPLACEMENT T- 12 ....................... RELAY .. ....... T- 13 STRUCTURAL VIEW ................... T- 13 ........................ DESCRIPTION T- 13 RETRACTABLE HEADLIGHT RELAY .... T- 14 ....................... FLASHER UNIT T- 14 ........................... TNS RELAY T- 15 .......................... HORN RELAY T- 15 COOLANT FAN RELAY ................. T- 15 REAR WINDOW DEFROSTER RELAY ... T- 16 HEADLIGHT RELAY ................... T- 16 ................................ SWITCH T- 17 ................... STRUCTURAL VIEW T- 17 ........................ DESCRIPTION T- 17 .................... IGNITION SWITCH T- 18 COMBINATION SWITCH ............... T- 19 RETRACTOR SWITCH AND HAZARD WARNING ............................. SWITCH T- 21 ................. INSTRUMENT CLUSTER T- 22 ................... STRUCTURAL VIEW T- 22 ........................ DESCRIPTION T- 22 .................... CIRCUIT DIAGRAM T- 23 ................. TROUBLESHOOTING T- 24 ............ REMOVAL / INSTALLATION T- 29 ........... DISASSEMBLY 1 ASSEMBLY T- 29 ...................... SPEEDOMETER T- 30 ........................ TACHOMETER T- 30 WATER TEMPERATURE GAUGE ....... T- 30 ......................... FUEL GAUGE T- 31 OIL PRESSURE GAUGE ............... T- 31 .................... PRINTED CIRCUIT T- 32 VEHICLE SPEED SENSOR ............. T- 32 WATER TEMPERATURE SENDER UNlT . T- 32 FUEL GAUGE SENDER UNlT ...................... (IN FUEL TANK) T- 32 OIL PRESSURE SENSOR .............. T- 33 ............... SPEEDOMETER CABLE T- 33 WARNING LIGHT AND SENDER UNIT ..... T- 34 ................... STRUCTURAL VIEW T- 34 CIRCUIT DIAGRAM .................... T- 35 ................. TROUBLESHOOTING T- 36 BRAKE FLUID LEVEL SENSOR ......... T- 39 PARKING BRAKE SWITCH ............. T- 39 ..................... BUCKLE SWITCH T- 39 ...................... LIGHTING SYSTEM T- 40 ................... STRUCTURAL VIEW T- 40 ......................... HEADLIGHTS T- 41 ......................... STOPLIGHTS T- 53 TURN AND HAZARD WARNING LIGHTS . T- 57 ..................... BACK-UP LIGHTS T- 66 TAILLIGHTS. SIDE MARKER LIGHTS. PARKING LIGHTS AND LICENSE PLATE LIGHTS . T- 69 DAYTIME RUNNING LIGHTS (DRL) .................... (CANADA SPEC.) T- 72 ........... REAR COMBINATION LIGHT T- 76 .................... INTERIOR LIGHTS T- 78 ................ ILLUMINATION LIGHTS T- 82 .................................. HORN T- 84 ................... STRUCTURAL VIEW T- 84 .................... CIRCUIT DIAGRAM T- 85 ................. TROUBLESHOOTING T- 86 ............ REMOVAL 1 INSTALLATION T- 87 ............ REAR WINDOW DEFROSTER T- 89 ................... STRUCTURAL VIEW T- 89 ........................ DESCRIPTION T- 89 ................. TROUBLESHOOTING T- 90 ................ REPAIRING FILAMENT T- 93 ............. CRUISE CONTROL SYSTEM T- 94 ................... STRUCTURAL VIEW T- 94 .................... CIRCUIT DIAGRAM T- 95 ................. TROUBLESHOOTING T- 96 ....... SELF-DIAGNOSTIC INSPECTION T-100 ............... CRUISE CONTROL UNIT T-103 .................... ACTUATOR CABLE T-104 ..................... CLUTCH SWITCH T-105 .......... STOP LIGHTIBRAKE SWITCH T-105 ...... CRUISE CONTROL MAIN SWITCH T-106 ........... CRUISE CONTROL SWITCH T-106 ............. VEHICLE SPEED SENSOR T-106 ........................... ACTUATOR T-107 a .................................. AUDIO T-108 ................... STRUCTURAL VIEW T-108 ................... SYSTEM DIAGRAM T-109 ............................ FEATURES T-110 FUNCTION AND OPERATING ......................... PROCEDURE 1-111 ............. OPERATION DESCRIPTION T-113 .................. ANTITHEFT SYSTEM T-120 ................. TROUBLESHOOTING T-122 ............ REMOVAL I INSTALLATION T-145 .................... POWER ANTENNA T-149 ......................... INSPECTION T-153 CONNECTOR TERMINAL .................... SPECIFICATIONS T-154 SRS AIR BAG SYSTEM .................. T-156 PREPARATION ........................ T-156 ................... STRUCTURAL VIEW T-156 .......... COMPONENT DESCRIPTION T-157 SYSTEM DIAGRAM ................... T-158 ................. SERVICE WARNINGS T-159 GENERAL PROCEDURES ............. T-160 TROUBLESHOOTING ................. T-160 DRIVER-SIDE AIR BAG MODULE ....... T-206 PASSENGER-SIDE AIR BAG MODULE . . T-207 DIAGNOSTIC MODULE ................ T-208 CLOCK SPRING ....................... T-209 CRASH SENSOR (D-SENSOR) ......... T-210 CRASH SENSOR (S-SENSOR) ......... T-213 AIR BAG MODULE DISPOSAL . .. PROCEDURE ........................ T-215 INSPECTION OF SST (DEPLOYMENT TOOL) ............... T-217 Gartner Banana

INDEX T SRS AIR BAG SYSTEM 1. Driver-side air bag module ...... Removal / Installation page T-206 ........ Disposal procedure page T-215 2. Passenger-side air bag module ...... Removal / Installation page T-207 ........ Disposal procedure page T-215 3. Clock spring ...... Removal / Installation page T- 19 ................ Inspection page T-209 I 45UOTX-007 4. Diagnostic module ...... Removal / Installation page T-208 5. Crash sensor (D-sensor) ...... Removal / Installation page T-210 ................ Inspection page T-212 6. Crash sensor (S-sensor) Removal / Installation ...... page T-213 ................ Inspection page T-214 Gartner Banana

T OUTLINE OUTLINE TROUBLESHOOTING GUIDE Symptom a Speedometer does not operate or indication is incorrect a Tachometer does not operate Water temperature gauge does not operate Fuel gauge does not operate a Oil pressure gauge does not operate a Brake system warning light remains illuminated Brake system warning light does not illuminate when parking brake on a Brake system warning light does not illuminate when brake fluid in reservoir is below MIN a OID off indicator light does not illuminate when OID off switch turned on Seat belt warning light remains on six seconds after ignition switch is turned on (Timer function does not operate) Seat belt warning light does not illuminate when ignition switch is first turned on a Headlights do not illuminate Headlight does not illuminate (Right or left) Retractable headlight actuator do not operate (Both sides) Retractable headlight actuator does not operate (One side) Stoplights do not illuminate (All) Stoplight does not illuminate (One only) Turn and hazard warning functions do not operate Turn signals not operate (Hazard warning function operates normally) Hazard warning function does not operate (Turn signals function normally) Back-up lights does not illuminate Taillights, side marker lights, and license plate lights do not illuminate Daytime running lights do not illuminate Daytime running light function does not cancel lnterior lights do not illuminate Interior liahts remains illuminated (Control switch: DOOR ~osition) Horn does not sound Vehicle speed cannot be set (Cruise control unit will not hold vehicle speed) Speakers do not operate (Without headrest speakers) Speakers do not operate (With headrest speakers) Poor sound quality or noise (Radio) Poor sound quality (Cassette tape player) Cassette tape will not load Cassette tape will not play Compact disc will not load Compact disc skips No sound can be heard Some speakers do not operate Bodysonic will not play Service code table (With passenger-side air bag) Service code table (With out ~assenaer-side air baa) Reference page T-24 T-25 T-26 T-27 T-28 T-36 T-37 T-37 Gartner Banana

FUSE SPECIFICATIONS Main Fuse Block u I Fuse Amperes Protected circuit HEAD INJ MAIN BTN 30A 30A COOLING FAN (AD FAN) 1 ABS I 60A I Antilock brake svstem I Headlight relay, Headlight switch Alternator, Diagnostic module (for air bag system) 80A 40A ST SIG RETRACTOR Fuse Box No.1 Except circuits protected in main fuse block: INJ 30A, HEAD 30A, RETRACTOR 30A TNS relay, Headlight switch 30A 20A EGI main relay, Coolant fan relay A/C relay 10A 30A Park l Neutral switch, Circuit-opening relay Retractable headlight actuator Fuse ENGINE METER (POWER WIND) Amperes 15A WIPER TAIL ROOM I 10A I PCME, Key reminder switch, Audio unit I Protected circuit EGI main relay, Coolant fan relay 15A 30A STOP HAZARD CIGAR 15A I Cigarette lighter, Audio unit 1 Instrument cluster, Turn signal switch, Timer and buzzer unit, Cruise control main switch Power window switch 20A 15A Fuse Box No.2 Blower switch, Wiper switch Taillights, Side marker lights, License plate lights, Parking lights 15A 15A Fuse Amperes Protected circuit I Stoplight switch, Horn switch, Cruise control unit Flasher unit Fuse Color Code (DEFOG) (ANTENNA) I Fuse amperes I Color code Fuse type 25UOTX-013 20A 20A I I 10A Red 1 I Rear window defroster Power antenna Plate type 15A 20A Light blue Yellow 30A 30A 80A Light green Pink Black Cartridge type Gartner Banana

SWITCH T SWITCH STRUCTURAL VIEW 1. Ignition switch 2. Combination switch 3. Retractor switch 4. Hazard warning switch DESCRIPTION Combination Switch The combination switch is includes a clock spring type electrical connector for supplying electrical cur- rent to the air bag module and horn switches. When installing the combination switch, make sure the clock spring connector is properly aligned. If it is not, it may be broken or the steering wheel may not turn fully. (Refer to page T-19.) 45UOTX-022 Gartner Banana

SWITCH T COMBINATION SWITCH Removal 1 Installation 1. Disconnect the negative battery cable. - 2. Remove as shown in the figure. 3. Install in the reverse order of removal. Before installing the steering wheel, reset the clock spring connec- tor. COLUMN COVER TURN CLOCKWIS RETURN 2.75 TURNS - STEERING WHEEL / AIR BAG MODULE Clock spring connector adjustment 1. Set the front wheels straight ahead. 2. Turn the clock spring connector clockwise until it stops. Caution Do not force the front wheels straight ahead. 3. Return the connector 2.75 turns. 4. Align the marks on the clock spring connector and the outer housing. Gartner Banana

T WARNING LIGHT AND SENDER UNIT WARNING LIGHT AND SENDER UNlT STRUCTURAL VIEW 1. Brake system warning light 2. Seat belt warning light 3. Air bag system warning light 4. Retractor indicator light 5. Alternator warning light 6. MIL (malfunction indicator light) 7. O/D OFF indicator light 8. Antilock brake system warning light 9. Washer level indicator light 10. Rear window defroster indicator light Reference Table Warning indicator light SRS air bag system Retractor indicator light Alternator MIL (malfunction indicator light) O/D OFF Antilock brake system Washer level 45UOTX-062 T-34 Reference page or section T-154 T- 48 section G section F section K section P T- 39 J Gartner Banana

:-2 .BACK-UP LIGHTS .HORN .STOPLIGHTS .HIGH-MOUNT STOPLIGHT MAIN FUSE BLOCK MAIN BUB TRAOE NUMBER ma-u~ LIGHTS: 11% (~WI Ix-oal OoA FUSE BLOCK \ ,, HIGH-HOUNT STOPLIGHT: 921 (l8.4W) STOP STRIGHTS: 1157 (27Wl PARK/NEUTRAL W/R (F) << IX-MI 15* FUSE BLOCK W/G IF) 0 F-O2k=zz& hORN RELAY F-03 G/O (F) STOR IGHT -5t SWITCH F-03 BACK-LP G/R LIGHT SWITCH OATA LINK PASSENGER-SIOE CONNECTOa (F) AIR BAG MOOWE (SECTION U! R/G (F) z:zzzz::zzzz:zz: G/R IF) F-0.551 HORN 0RIVE;I-SIOE AIR BAG MOOULE . E-19 E-20 A B B (R) (Rl A - VW REAR COnsINATION LIGHT F-05 HORN (F) F-06 PASSENGER-SIDE AIR BAG MXIULE(F) I U j-03 ORIVER-SIOE S-W PASSENGER-SIOE A:R BAG nrrmE (F) AIR BAG MX)UE (F) Gartner Banana