1994 MAZDA MX-5 coolant temperature

CONTROL SYSTEM STRUCTURAL VIEW i 1. Powertrain control module (engine) 6. Heated oxygen sensor Inspection . . . . . . . . . . . . . . . . . . page F-144 Inspection . . . . . . . . . . . . . . . . . . page F-156 Removal / Installation . . . . . . . . page F-143 Replacement . . . . . . . . . . . . . . . page F-156 2. Crankshaft position sensor 7. Main relay Removal . . . . . . . . . . . . . . . . . . . page F-153 Inspection . . . . . . . . . . . . . . . . . . page F-156 lnspection . . . . . . . . . . . . . . . . . . page F-153 8. Clutch switch Installation . . . . . . . . . . . . . . . . . page F-153 Inspection . . . . . . . . . . . . . . . . . . page F-157 3. Mass airflow sensor Replacement . . . . . . . . . . . . . . . page F-157 System inspection . . . . . . . . . . . page F-152 9. Neutral switch Inspection . . . . . . . . . . . . . . . . . . page F-152 Inspection . , . . . . . . . . . . . . . . . . page F-157 4. Engine coolant temperature sensor Replacement . . . . . . . . . . . . . . . page F-157 Removal . . . . . . . . . . . . . . . . . . . page F-154 10. Steering pressure sensor Inspection . . . . . . . . . . . . . . . . . . page F-154 Inspection . . . . . . . . . . . . . . . . . . page F-158 Installation . . . , . . . . . . . . . . . . . page F-154 Replacement . . . . . . . . . . . . . . . page F-158 5. Throttle position sensor -,' Inspection . . . . . . . . . . . . . . . . . . page F-155 Adjustment . . . . . . . . . . . . . . . . . page F-155 Replacement . . . . . . . . . . . . . . . page F-156 Gartner Banana

F CONTROL SYSTEM B+: Battery positive voltage Connection to 1 Test condition 1 Voltage I Remark I -- EGR solenoid valvi Idle B+ Blower switch -- EGR solenoid valve (vacuum) :vent) Initial acceleration* Blower switch at mid, high or su- per high position Blower switch OFF or low Headlight switch Neutral or clutch switch (MT) B+ Idle ParWneutral switch (AT) Ground (Injector) Ground (Output) Ground (PCME) Approx. OV - Approx. 12V B+ Headlights ON (Tail, parking, low beamfhigh beam) Headlights OFF Neutral position or clutch pedal de- pressed Other conditions Ground (Input) Crankshaft position (SGT-signal) Ignition switch ON N or fJ range Other conditions Constant Constant Constant -. Mass airflow sensor .. . . EGR function sensor I while running Approx. 0-5v Initial acceleration* Approx, 2V OV ov B+ Constant Ignition switch ON Idle Crankshaft position sensor (SGC-signal) Data link connector (TEN terminal) Igniter I I I Vre f I lanition switch ON 1 4.5-5.9.' 1 - B+ - OV B+ OV OV OV Ignition switch ON Idle - - - OV OV or 5V ADD~OX. 2V - - Ignition switch ON Idle System Selector test switch at "02 MONITOR" System Selector test switch at "SELF-TEST" Ignition switch ON Idle lanition switch ON I . . I I 1 Ignition switch ON I Below 1 .OV I I - - . . Below 1 .OV Below 1 .OV ear window defrost- er relay Throttle position sensor Heated oxygen sensor - OV or 5V Approx. 1.5V B+ ov Below 0.5V Approx. 1 V Approx. 1 .OV - - - " Rear window defroster switch OFF Rear window defroster switch ON Accelerator pedal released Accelerator ~edal fullv de~ressed Mass airflow sensor B+ Below 1 .OV 0.1-1 .o 3.14.5 Intake air temperature sensor Engine coolant tem- perature sensor lgnition switch ON lgnition switch ON Ignition switch ON Idle ireen and red lamps flash At 200C {680Fj Engine coolant temperature 20°C {680F) After warm-up Below 1 .OV 1 .O-2.0 - Approx. 2.5V Approx. 2.5V Approx. 0.4V Built in mass airflow lgnition switch ON 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

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

TECHNICAL DATA D. LUBRICATION SYSTEM - Engine ltem BP DOHC - -. Lubrication system Force-fed type E. COOLING SYSTEM Trochoid gear 344-41 I3.5--4.5,s-31 9&l96 {I .&2.0, 15--28) 295-392 {3.0-4.0,43-56) 0.02-0.1 8 {0.000&0.0070) 0.20 {0.0079) 0.09-0.18 (0.0036-0.0070) 0.20 {0.0079) 0.03-0.1 2 {0.0012-0.0047) 0.14 (0.0055) TY pe Relief pressure kPa {kgf/cm2, psi) Oil pressure kPa {kgf/cm2, psi) Inner rotor tooth tip to outer rotor clearance mm {in) Outer rotor to body clearance mm {in) Side clearance mm {in) Water seal type I Unified mechanical seal Thermostat 1,000 rpm 3,000 rpm Standard Maximum Standard Maximum Standard Maximum Oil filter Engine ltem - - Cooling system . . Impeller diameter mm {in) Number of impeller blades Type Relief pressure differential kPa {kgf/cm2, psi) BP DOHC Water-cooled, forced circulation - 75 i2.95) 6 Full-flow, paper element 74-1 17 {0.&1.2, 12-1 7) TY pe . ., . . . - Radiator I Water pump Wax, two-stage v. . . Full-open temperature "c {OF) Full-open lift mm {in) Engine oil TVD~ O~enina tem~erature "C con I Sub: 83.5-86.5 U83-187). Main: 86.5-89.5 (1 88-1 931 100 (21 2) Sub: 1.5 (0.06) min., Main: 8.0 (0.31) min. -. . - . . Cooling circuit checking pressure kPa {kgflcmz, psi) I 103 {I .05, 14.9) I Centrifugal, V-ribbed belt driven TY pe I Coolant fan I 4.0 (4.2, 3.5) 3.6 {3.8,3.2) 3.75 (4.0, 3.3) API Service SG, SH (ECII) ILSAC Capacity Corrugated fin viscosity Above -25°C (-1 3°F) SAE 1 OW-30 number Below 0°C {3Z°F) SAE 5W-30 Total (dry engine) L {US qt, Imp qt) Oil replacement L {US qt, Imp qt) Oil and oil filter replacement L {US qt, Imp qtl Cap valve o~enina pressure kPa {krrf/cm2, psi} 1 73.6--102 {0.75--1.05, 10.7-14.91 Capacity W-V I 120-1 2 Current A 1 below 7.7 Engine oil Type Number of blades Outer diameter mm {in) Coolant Capacity L {US qt, Imp qt) I 6.0 {6.3,5.3) Electric 5 320 (1 2.61 Gartner Banana

TD TECHNICAL DATA Idle speed rpm 1 800-900 (850 2 50) [MT]', 750-850 (800 f 50) [ATJ' lanition timina BTDC I 9"-11' (10' f 1")' u' F. FUEL AND EMISSION CONTROL SYSTEMS - Engine ltem Item 1 Throat diameter mm {in) 1 55 (2.2) 1 Antifreeze solution BP DOHC Specification 1 Throttle body Fuel pump TY pe I Impeller (in-tank) Coolant protection Above -1 6°C (3°F) Above -26°C (-15°F) Above -40°C {-40°n Tv~e -. Output pressure kPa (kgf/cm2, psi) I 294-437 {3.0--6.5,43--92) Fuel filter Specific gravity at 20°C {WF) 1.054 1.066 1.078 Volume percentage % Horizontal draft Water 65 55 45 -. . - Regulating pressure kPa {kgf/cm2, psi) I 280-289 I2.85--2.95, 40.141.9) Fuel iniector Coolant 35 45 55 TY pe IAC valve Solenoid resistance n 1 10.7-1 2.3 (at 20°C (68°F)) Low-pressure side TYP~ Type of drive Resistance n Purge solenoid valve Solenoid resistance n 1 23-27 (at 20°C (68°F)) I Nylon element Pressure regulator TY pe High-ohmic Voltage 13.8 (at 20°C (68"FI) Engine coolant temperature sensor 7 20°C {68"F) I 2.21 -2.69 Resistance kn I 80°C (1 76OF} I 0.287-0.349 High-pressure side Diaphragm i/ Crankshaft position sensor Air valve Openin~l temperature OC {OF) I Below 45 (1 131 Paper element Twe 1 Fuel tank I Hall effect . . . . . . . Capacity L {US gal, Imp gal) I 48 {12.7, 10.5) Air cleaner housing Element type Free play mm (in) I 1-3 {0.039--0.118) I Fuel Oil permeated Specification Accelerator cable Unleaded regular (RON 87 or higher) J +....with system selector (49 B019 9AO) test switch at SELF TEST Gartner Banana