1994 MAZDA MX-5 coolant

CONTROL SYSTEM Check Point for Each Terminal B+: Battery positive voltage Terminal -. - Connection to Abnormal voltage Possible cause Battery Always OV (Battery OK) Always OV Main relay a ROOM 10A fuse burned Open circuit in wiring from ROOM 1 OA fuse to PCME terminal 1A Main relay malfunction (Refer to page F-156) Open circuit in wiring from main relay to PCME termi- nal 1 B Ignition switch (Start position) a Main relay malfunction (Refer to page F-156) Open circuit in wiring from main relay to data link connector terminal +B Open or short circuit in wiring from data link connec- tor terminal MEN to PCME terminal 1 D Always OV (Starter turns) Always OV Open circuit in wiring from starter interlock switch to PCME terminal 1 C Self-Diagnosis Checker (Monitor lamp) Always B+ a Poor connection at PCME connector PCME malfunction I Always approx. 5V I a PCME malfunction Malfunction indicator light (MIL) Always below 2.5V (MIL always ON) Always below 2.5V Open circuit in wiring from combination meter to (MIL never ON) I PCME terminal I E a Short circuit in wiring from combination meter to PCME terminal 1 E PCME malfunction Always B+ Poor connection at PCME connector a PCME malfunction Self-Diagnosis Checker (Code No.) Always below 2.5V (No display on Self-Diagnosis Checker) Main relay malfunction (Refer to page F-156) a Open circuit in wiring from main relay to data link connector terminal +B Always B+ Always below 2.5V ("88" is displayed and buzzer sounds continuously) a Poor connection at PCME connector a PCME malfunction - Open or short circuit in wiring from data link connec- tor terminal FEN to PCME terminal I E Igniter Always OV a Refer to Code No.01 troubleshooting I (Refer to section GI Powertrain control module (transmission) Always B+ I PCME malfunction A/C relay malfunction (Refer to section U) a Open circuit in wiring from main relay to NC relay a Open circuit in wiring from NC relay to PCME termi- nal 1 J a Short circuit in wiring from NC relay to PCME termi- nal 1 J a PCME malfunction Always below 2.5V (NC does not operate) Always below 2.5V (Air conditioning sensor OFF but A/C operates) AIC relay Air conditioning sensor malfunction (Refer to section U) Poor connection at PCME connector PCME malfunction Always B+ Open circuit in wiring from PCME terminal 1 K to ground PCME malfunction Ground (MT) Always B+ Open (AT) Always OV Short circuit in wiring from PCME terminal 1 K to grounc PCME malfunction Coolant fan relay Always below 1 .OV (Coolant fan OK) Open or short circuit in wiring from fan relay to PCME terminal I L PCME malfunction Gartner Banana

CONTROL SYSTEM B+: Battery positive voltage Terminal Connection to Abnormal voltaae Possible cause Mass airflow sensor (Intake air temperature sensor) Refer to Code No.10 troubleshooting (Refer to page F-87) Always OV or approx. 5V Intake air temperature sensor malfunction (Refer to page F-152) Refer to Code No.09 troubleshooting (Refer to page F-87) Engine coolant temper- ature sensor Always OV or approx. 5V r Engine coolant temperature sensor malfunction (Refer to page F-154) Refer to Code No.25 Troubleshooting (Refer to page F-91) Always OV or B+ PRC solenoid valve r Open or short circuit in wiring from condenser fan relay to PCME terminal 25 PCME malfunction Open or short circuit in wiring from fuel pump relay to PCME terminal 2T Condenser fan relay Always below 2.OV Fuel pump relay Always below 1 .OV Main relay malfunction (Refer to page F-156) r Open or short circuit in wiring from fuel injector to PCME terminal 2U or 2V Always OV Fuel injector ldle air control valve Purge solenoid valve Always B+ Always OV or B+ Always OV or B+ PCME malfunction r Refer to Code No.34 troubleshooting (Refer to page F-93) ldle air control solenoid valve malfunction (Refer to page F-I 06) r Refer to Code No.26 troubleshooting (Refer to page F-91) r Purge solenoid valve malfunction (Refer to pane F-132) -- Fuel injector Always OV Main relay malfunction (Refer to page F-156) Open or short circuit in wiring from fuel injector to PCME terminal 2Y or 22 Always B+ PCME malfunction Gartner Banana

CONTROL SYSTEM TEMPERATURE NGlNE COOLANT EMPERATURE ENGINE COOLANT TEMPERATURE SENSOR Removal 1. Remove the ignition coil assembly. (Refer to section G.) 2. Disconnect the engine coolant temperature sensor con- 4 nector. 3. Remove the engine coolant temperature sensor. lnspection 1. Place the sensor in water with a thermometer and heat the water gradually. 2. Measure resistance of the sensor with an ohmmeter. 3. If not as specified, replace the engine coolant tempera- ture sensor. Specification DCBA Coolant 20°C {68"F) 80°C {I 76°F) FEELER GAUGE Resistance kR 2.21 - 2.69 0.287- 0.349 Installation 1. Install the engine coolant temperature sensor and a new washer. Tightening torque: -J 25-29 N.m (2.5-3.0 kgf-m, 19--21 ft-lbf) 2. Connect the engine coolant temperature sensor con- nector. 3. Install the ignition coil assembly. (Refer to section G.) THROTTLE POSITION SENSOR lnspection Idle switch 1. Turn the ignition switch OFF and the throttle valve closed throttle position. 2. Disconnect the throttle position sensor connector. 3. Check continuity of the throttle position sensor terminals C and D. I C-D I Continuity 4. If not as specified, adjust the throttle position sensor. (Refer to page F-155.) 5. Insert a feeler gauge 0.4 mm {0.016 in) between the stopper and the throttle lever. 6. Verify that no continuity the throttle position sensor ter- minals C and D. - 7. If continuity, adjust the throttle position sensor. (Refer to page F-155.) Specification Terminals Throttle valve closed throttle ~osition Gartner Banana

K MECHANICAL SYSTEM TEST MECHANICAL SYSTEM TEST PREPARATION SST STALL TEST 49 0378 400A Gauge set, oil pressure 49 801 9 901 Gauge, oil pressure For oil pressure test For oil pressure test This test is performed to determine if there is slippage of the friction elements or malfunction of the hy- draulic components. Preparation 1. Check the engine coolant, engine oil, and ATF levels before testing. 2. Warm the engine thoroughly to raise the ATF temperature to operating level (50--80°C, 122-176°F). 3. Engage the parking brake and use wheel chocks at the front and rear of the wheels. ENGAGE PARKING BRAKE WARM UP ENGINE COOLANT LEVEL ENGINE OIL LEVEL TEMPERATURE 60-70°C (1 40-1 58°F) ATF LEVEL Gartner Banana

OUTLINE OUTLINE SPECIFICATIONS Front Suspension - Transmission item (Stabilizer Specifications MT I AT - I Susoension tvoe I . , . , I . , Shock absorber Cylindrical double acting, low-pressure-gas charged I Double-wishbone TY pe Torsion bar Coil spring I - Diameter mm linl I 20.0 10.79) Identification mark color 19.0 (0.75) White Wire diameter mm (in) Coil inner diameter mm {in) I Blue Free length mm {in) Coil number 11 .O (0.43) 83 i3.27) 11 .O (0.43) 83 (3.27) 292.5 (1 1 32) 6.32 3 +. 3 (0.12 + 0.12) 0°18' + 18' Total toe-in I - I 35UORX-001 Rear Suspension 302.0 (1 1.89) 6.32 mm {in) degree Total toe-in (per side) 1 degree Front wheel alignment (Unladedt1) 0°09' +. 09' Caster anglee3 4"26' +. 45' Kingpin angle 11 "20' Maximum steering angle Transmission Specifications MT I AT Item Differential - Suspension type Inner Outer "TORSEN" LSD 1 Standard Double-wishbone Coil springs 370 23' a 2" 32" 32' -t 2" Camber anglee2 Torsion bar 12.0 (0.47) 1 11.0 (0.43) 1 11 .O (0.43) Cylindrical double acting, low-pressure-gas charged - Stabilizer Identification mark color Wire diameter mm {in) 0°24' + 45' Type Diameter mm {in) I Coil number I 7.68 I 7.96 I Shock absorber Yellow 10.1 {0.40} Coil inner diameter mm {in) Free length mm {in) Green 10.2 {0.40) 35UORX-002 *I Fuel tank full; radiator coolant and engine oil at specified levels; spare tire, jack, and tools in designated positions. '2 Difference between left and right must not exceed I O. '3 Difference between left and right must not exceed 1'30'. "TORSEN" is a registered trademark of ZEXEL-GLEASON USA.INC 83 I3.27) 348.5 j13.72) Rear wheel alignment (Unladed*') 83 (3.27) 356.5 (1 4.04) Total toe-in Total toe-in (per side) mm (in) degree degree 3 -c 3 (0.12 + 0.121 0°18' + 18' 0°09' + 09' Camber angle*2 -0°43' 2 30' Gartner Banana

WHEEL ALIGNMENT WHEEL ALIGNMENT FRONT WHEEL ALIGNMENT Specifications (Unladed*l) PRE-INSPECTION 1. Check the tire inflations, and adjust to the recommended d pressure if necessary. 2. lnspect the front wheel bearing play and correct if neces- sary. 3. lnspect the wheel and tire runouts. 4. Inspect the ball joints and steering linkage for excessive looseness. 5. The vehicle must be on level ground and carry no lug- gage or passengers. 6. Measure the height from the center of the wheel to the fender brim. The difference between left and right mea- surement must not exceed 10mm (0.39 in), and the rear measurement must be larger then the front measure- ment by 10-30mm (0.4--1.1 in). Caution The proper caster and camber angle vary depend- ing on the vehicle height. Refer to the following and to page R-9 for the specifications. Inspection and adjustment of wheel alignment must be done with the vehicle unladed*'. . . I Y -- t~otal toe-in l~er side) I 1 dearee 0'09' + 09' I Total toe-in 3 2 3 I0.12 2 0.12) 0'1 8' 2 18' mm (in) dearee Maximum steering angle U - Inner Outer 11 '20' -0°20' 2 45' 0'03' ? 45' 0'24' 2 45' 0°44' -+ 45' 1'02' -+ 45' 5'1 6' ? 45' 5O02' -+ 45' 4O49' 2 45' 4'35' -+ 45' 4'21 ' -+ 45' I Kingpin angle 37"23' -+ 2" 32O32' 2 2" '1 Fuel tank full; radiator coolant and engine oil at specified levels; spare tire, jack, and tools in designated positions. OSUORX-009 ** Difference between left and right must not exceed lo. '3 Difference between left and right must not exeed 1'30'. 328-337 {I 2.9-1 3.3) 338-347 {I 3.3-1 3.7) 340-357 I13.7-14.1) 358-367 {I 4.1-14.4) 36&377 {I 4.4--14.8) 328-337 {I 2.9--13.3) 338-347 {I 3.3-1 3.7) 348-357 113.7-14.1) 358-367 {I 4.1-14.4) 368-377 {I 4.4--14.8) Camber angleg2 Caster angle*3 Height from center Of wheel to fender brim mm {in) Height from center Of wheel to fender brim mm (in) Gartner Banana

WHEEL ALIGNMENT REAR WHEEL ALIGNMENT Specifications (Unladed*) I Item I Specifications I L *' Fuel tank full; radiator coolant and engine oil at specified levels; spare tire, jack, and tools in designated positions. 05Uo~x-01~ *2 Difference between the leff and right must be exeed lo. 3 + 3 i0.12 * 0.12) 0'18' k18' 0'09' 2 09' -1 "08' +. 30' Total toe-in Total toe-in (per side) Camber angle'' LEFT WHEEL - mm {in) degree degree INCREASE I 1 346-355 (1 3.6-1 4.0) Height from center of wheel to fender brim'2 mm Iin) RIGHT WHEEL C INCREASE 356-3135 {14.0-14.4) 366-375 {I 4.4--14.8) 376-385 {I 4.8-1 5.2) 386--395 {I 5.2-1 5.6) LEFT WHEEL -C -0°54' r 30' -0'43' 2 30' -0°35' r 30' -0'30' +. 30' Toe-in Toe-in is adjusted by turning the front and/or rear adjust- ing cam bolts at the lower arm. Caution Adjust the toe-in before adjusting the camber. 1. Loosen the front and/or rear cam nuts. 2. Turn the front and/or rear adjusting cam bolts to provide the correct toe-in. I Counter- Counter- Decrease Clockwise Clockwise clockwise clockwise Toe-in Note Turning the front cam one graduation changes the toe-in about 2.8mm (0.11 in} and the camber about 15'. Turning the rear cam one graduation changes the toe-in about 2.8mm I0.11 in} and the camber about 6'. 3. 'Adjust the camber. Left wheel Camber Camber is adjusted by turning the front and rear cams at the lower arm. Right wheel Caution Adjust the camber after adjusting the toe-in. Front cam I Rear cam I Front cam I Rear cam 1. Loosen the front and rear cam nuts. 2. Turn the front and rear adjusting cam bolts the same amount in the opposite direction to provide the correct camber angle. Gartner Banana

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