1994 MAZDA MX-5 instrument cluster

T INSTRUMENT CLUSTER 4. Set the SST to the resistance values shown in the figure. To get an accurate reading, wait 2 minutes after setting each value. 5. Verify that the gauge indicates the correct values. The al- \J lowable indication error is twice the width of the needle. 6. If not as specified, replace the oil pressure gauge. PRINTED CIRCUIT lnspection 1. Remove the instrument cluster. (Refer to page T-29.) 2. Check the printed circuit for damage or oxidization. 3. If necessary, replace the printed circuit. VEHICLE SPEED SENSOR lnspection 1. Remove the instrument cluster. 2. Connect an ohmmeter between terminals 2D and 2F. 3. Verify that the ohmmeter needle pulsates while rotating the speedometer cable shaft. ~ Pulsation: Ushaft rotation 4. If the correct number of pulsations fail to occur during each shaft rotation, replace the vehicle speed sensor. (Refer to page T-29.) WATER TEMPERATURE SENDER UNlT lnspection 1. Remove the sensor. 2. Place the sensor and a thermometer in water. 3. Heat the water gradually, and measure the resistance of the sensor with an ohmmeter. 4. If the resistance is not as specified, replace the sensor. Resistance: 190-260Q at 50°C (1 22°F) FUEL GAUGE SENDER UNlT (IN FUEL TANK) lnspection 1. Remove the fuel tank gauge sender unit. (Refer to section F.) 2. Disconnect the fuel gauge sender unit connector. 3. Check resistance between terminals A and B while slow- ly moving the unit arm from point F to point E. 4. If not correct, replace the fuel gauge sender unit. 2 Gartner Banana

INSTRUMENT CLUSTER T I OIL PRESSURE SENSOR 3. If not as specified, replace the oil pressure sensor. OIL PRESSURE SENSOR lnspection 1. Disconnect the oil pressure sensor connector. 2. Measure resistance between the oil pressure sensor and a body ground as shown. SPEEDOMETER CABLE lnspection 1. Disconnect the speedometer cable from the instrument cluster and transmission case. 2. Verify that the cable and gear spin easily when turned by hand. 3. If the cable or gear is stiff, replace as necessary. Condition Engine stopped Engine running Resistance 110-13052 13- 55R Gartner Banana

WARNING LIGHT AND SENDER UNIT T CIRCUIT DIAGRAM :-a m INSTRUMENT CLUSTER MLiN FUSS LICCd I n L IL/V~~J~,IB/M~W/BIG/LII R IL/V~Y/B[LG ( Y BILIB/Y~ 3 1 R I~/all r IG/R~R/w] B ~G/U~Y/G~G/B 1~ li IJ 91 n 10 w IE to 1~ 11 16 XL ar 11 b 30s a WXidZ.<, A, :-07 PLUlffi BRAKE SUlTCH 11) Gartner Banana

T WARNING LIGHT AND SENDER UNIT Remedy 1. Disconnect the timer and buzzer unit connector. 2. Turn the ignition switch ON, and verify that the seat belt warning light illuminates. I Warning light illuminates I Action Seat Belt Warning Light The seat belt warning light is controlled by the timer and buzzer unit. 1 Reolace timer and buzzer unit I Symptom: Seat belt warning light remains on six seconds after ignition switch is turned on. (Timer function does not operate.) I Yes Repair wiring harness (Instrument cluster - Timer and buzzer unit) I d 1 Symptom: Seat belt warning light does not illuminate when ignition switch is first turned on. I 45UOTX-070 Step 1 1. Ground terminal J of the timer and buzzer unit connector. 2. Turn the ignition switch ON, and verify that the seat belt warning light illuminates. 1 Warning light illuminates I Action I Step 2 1. Ground terminal D of the timer and buzzer unit connec- tor. 2. Turn the ianition switch ON. and verifv that the seat belt No Yes warning light illuminates. . Go to Step 2 Repair wiring harness (Timer and buzzer unit - GND) Warning light Illuminates Action Replace timer and buzzer unit Check bulb of seat belt warning light If bulb is OK, repair wiring harness (Instrument cluster - Timer and buzzer unit) Gartner Banana

T LIGHTING SYSTEM Description The headlight system consists of two halogen headlights mounted on retractable mechanisms, a head- light switch in the combination switch, and a retractor switch between the center ventilation outlets. When the headlight switch is rotated to the second position, the headlights are activated and the retract- able headlight actuator lift the headlights. If only the retractor switch is turned ON, the headlights will raise to the upright position, but all lights will be off. An emergency manual retractor knob is located on top of each retractable headlight actuator. 45UOTX-080 Troubleshooting A retractor indicator light is included in the instrument cluster. The indicator light illuminates when the re- tractable headlight actuator is operating and should go out when the headlights are fully raised or retracted. if the indicator light remains on, small objects, such as pebbles or pieces of ice, may lodged between the headlight and the vehicle body. Use the following procedure to correct this. Turn the ignition switch to OFF. Obtain the code number and deactivate the audio antitheft function. (Refer to page T-120.) Disconnect the negative battery cable or remove the RETRACTOR 30A fuse in the main fuse block. Raise or lower the headlight by turning the emergency retractor knob. Remove the obstruction. After verifying that the headlight switch and the retractor switch are off, reconnect the negative battery cable. Verify operation of the retractable headlight and the retractor indicator light. 45UOTX-095 --- Symptom: Headlights do not illuminate. HEAD 30A MAIN FUSE BLOCK Step 1 1. Check HEAD 30A fuse in the main fuse block. 2. If the fuse is burned, replace it. Check and repair the wir- ing harness, if necessary. 3. If the fuse is OK, go to Step 2. Gartner Banana

CRUISE CONTROL SYSTEM Step 8 - lnspection of actuator 1. Measure the cruise actuator solenoid resistance by us- ing an ohmmeter. Check terminals C-A 2. If not as soecified. redace the actuator. Resistance C-B C-D 3. If continuiiv is OK: ad to Ster, 84. Approx. 25 to 55R 4. ~isconne4 the actiator cabie from the accelerator ped- al. 5. Run the engine at idle speed. 6. Apply battery positive voltage to the following terminals, and check actuator operation. B+: Batterv aositive voltaae I Order 1 2 7. If not as specified, replace the actuator. Terminal condition AlBlClD 3 4 Step 9 - lnspection of vehicle speed sensor 1. Remove the instrument cluster. 2. Check for continuity between terminals 2D and 2F while rotating the speedometer cable. 3. If there are not four pulses per shaft rotation, replace the vehicle speed sensor. (Refer to page T-32.) 4. If there are four pulses per rotation, check the wiring har- ness. (instrument cluster - control unit). 5. If the wiring is OK, replace the cruise control unit. Operation of control cable GND GND GND - GND - - B+ B+ B+ - GND GND Pull Hold - - Extend Release Gartner Banana

T CRUISE CONTROL SYSTEM CRUISE CONTROL UNIT u CRUISE CONTROL MAIN SWITCH lnspection 1. Check for continuity between terminals of the cruise con- trol main switch. I I I I I I Neutral I Position Terminal A 'IBIDIFIGIH M : Continuity OFF ON 2. If not as specified, replace the cruise control main switch. CRUISE CONTROL SWITCH lnspection 1. Remove the knee protector and disconnect the com- bination switch connector. 2. Check for continuity between terminals of the combina- tion switch connector. u 0 0 Switch 3. If not as specified, replace the cruise control switch. SETICOAST RESUMVACCEL VEHICLE SPEED SENSOR lnspection 1. Remove the instrument cluster. 2. Check for continuity between terminals 2D and 2F while rotating the speedometer cable. 3. If there are not four pulses per shaft rotation, replace the vehicle speed sensor. (Refer to page T-32.) d n V Terminal 0 0 SE I RE M: Continuity 0 E 0 0 0 Gartner Banana

AUDIO Component 4LC (AUTO LEV- Terminal A: Speaker left F : Speaker right B: Speaker left H: Speaker right C: N.C. I : N.C. D: N.C. J : N.C. Connector BID A : Headrest speaker left H: Headrest speaker right B : Headrest speaker left I : System mute C: ACC J : ALC (INSTRUMENT D: Illurni (IN) CLUSTER) F : Headrest speaker right A: Bodysonic right C: Bodysonic left B: Bodysonic right D: Bodysonic left AICW FI H 1 : Input right 5 : Input left 2 : +13.2V Control Power 6: GND 3 : Input left E : Shield earth 4 : lnput right I J Gartner Banana