warning light MAZDA MX-5 1994 Owner's Manual

T WARNING LIGHT AND SENDER UNIT TROUBLESHOOTING Check the METER 15A fuse in the fuse box before troubleshooting. If it is burnt, replace it after checking and repairing the wiring harness. i/ Brake System Warning Light I Symptom: Brake system warning light remains illuminated. 45UOTX-063 Step 1 - Check brake fluid level Check brake fluid level. Below MIN I I Check brake system (Refer to section P) I Brake fluid level Action Step 2 - Check parking brake switch 1. Disconnect the parking brake switch connector. 2. Check for continuity between the terminal of the switch and ground. Above MIN Go to Step 2 3. If not as specified, adjust or replace the parking brake switch. (Refer to section P.) 4. If the switch is OK, go to Step 3. I Step 3 - Check brake fluid level sensor I 1. Check for continuity of the sensor. *. 1' Lever Pulled one notch Released Continuity Yes No - I Above MIN No Brake fluid level Below MIN 2. If not as specified, replace the level sensor. 3. If the sensor is OK, repair the wiring harness. Continuity Yes Gartner Banana

WARNING LIGHT AND SENDER UNIT T Symptom: Brake system warning light does not illuminate when parking brake is on. (Ignition switch to ON) 45UOTX-065 Remedy 1. Disconnect the parking brake switch connector. 2. Check for continuity between the terminal of the switch and ground. I Released 1 No I Lever 3. If not as specified, adjust or replace the parking brake switch. 4. If the switch is OK, repair the wiring harness. Continuity 010 OFF Indicator Light Symptom: O/D off indicator light does not illuminate when O/D off switch turned on. 45UOTX-069 Pulled one notch I Yes Symptom: Brake system warning light does not illuminate when brake fluid in reservoir tank is below MIN. 45UOTX-067 Remedy 1. Check the bulb of the O/D off indicator light. 2. If the bulb is burned out, replace it. u Remedy 1. Disconnect the brake fluid level sensor connector. 2. Check for continuity of the brake fluid level sensor. Brake fluid level Below MIN Above MIN Continuity Yes No 3. If not as specified, replace the level sensor. 4. If the sensor is OK, repair the wiring harness. 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

WARNING LIGHT AND SENDER UNIT T OHMMETER Washer Level Indicator lnspection 1. Disconnect the connector from the washer level sensor. 2. Jump terminal-wire L (harness side) to a body ground. 3. Start the engine and check that the WASHER indicator illuminates. 4. If there is no illumination, check the bulb, wiring harness, and sensor. Replace or repair as necessary. Washer Level Sensor lnspection 1. Connect the sensor connector (sensor side) to an ohm- meter. 2. Move the sensor float up and down. 3. Verify that there is continuity when the float is at the low- est point. BRAKE FLUID LEVEL SENSOR lnspection 1. Check for continuity of the sensor. 2. If continuity is not as specified, replace the level sensor. Float level Below MIN Above MIN BUCKLE SWITCt Continuity Yes No OHMMETER -1 PARKING BRAKE SWITCH lnspection 1. Disconnect the parking brake switch connector. 2. Check for continuity between the switch connector and ground. I Lever I Continuity I 3. If continuity is not as specified, adjust or replace the parking brake switch. (Refer to section P.) Pulled one notch Released BUCKLE SWITCH lnspection 1. Disconnect the buckle switch connector 2. Check for continuity of the switch. Yes No Seat belt I Continuity Seat belt buckled Seat belt unbuckled No Yes 3. If continuity is not as specified, replace the buckle switch. Gartner Banana

T LIGHTING SYSTEM LIGHTING SYSTEM STRUCTURAL VIEW 1. Retractable headlight 2. Retractable headlight actuator 3. Stoplight 4. High-mount stoplight 5. Turn and hazard warning light 6. Back-up light 7. License plate light 8. Side marker light 9. Taillight 10. Rear combination light 11. Interior light Gartner Banana

RtAH TURN ANU HAZARO WARNING LIGHTS . .. . 1 156 (27W) . .. I I 6 tiAzAmJ B ' ORL CONTROL UNIT (F) (F) I (SECTICN E-2) I I I '-1 FLASHER WIT =TURN AND HAZARD WARNING LIGHTS G/B G/W G/B G/W B (A) (R) AZARO ARVING WITCH E-19 1 I HAZARO INSTRUclENT CLUSTER 0 (SECTION C-b) (:I Gartner Banana

T LIGHTING SYSTEM Troubleshooting 1 Symptom: Turn and hazard warning function do not operate. I Step 1 Check HAZARD 15A fuse and METER 15A fuse in the fuse block. Step 2 Measure voltage at terminal H (B/R) of the flasher unit connector. Fuse Burnt OK Action Replace fuse after checking and repairing wiring harness Go to Step 2 Step 3 1. Disconnect the flasher unit connector. 2. Check for continuity between terminal A (B) of the flasher unit connector and ground. B+: Battery positive voltage -1 Voltage B+ Other Continuity Step 4 1. Turn the ignition switch ON. 2. Set the turn signal switch ON (right or left) and measure voltage at terminal C (G/Y) and terminal B (G/R) of the combination switch connector (&pin connector). Action Go to Step 3 Repair wiring harness (Hazard fuse - Flasher unit) Action Yes No B+: Battery positive voltage I Terminal I Wire IVoltaae 1 Action I Reconnect connector and go to Step 4 Repairing wiring harness (Flasher unit - GND) C - u (w) ,, .,. I (ti~nl - B+ Others B+ , Others I lnspect combination switch Go to Step 5-1 Inspect combination switch Go to Ster, 5-2 d Gartner Banana

LIGHTING SYSTEM J 45UOTX-116 2. Set the turn signal switch to the left position and measure voltage at terminal E (G/R) of the flasher unit connector. Step 5 1. Set the turn signal switch to the right position and mea- sure voltage at terminal F (GN) of the flasher unit con- nector. B+: Battery positive voltage Voltage B+ Other Action Turn the ignition switch OFF and go to Step 6 Repair wiring harness (Combination switch - Flasher unit) B+: Battery positive voltage Voltage B+ Other Step 6 1. Remove the hazard warning switch. 2. Check for continuity between terminal H(B) of the hazard warning switch connector and ground. 2. If correct, reconnect connector and go to Step 8. 3. If not as specified, replace the hazard warning switch. Action Turn the ignition switch OFF and go to Step 6 Repair wiring harness (Combination switch - Flasher unit) Continuity Yes No Step 7 1. Check for continuity between terminals of the hazard warning switch. Step 8 1. Disconnect the flasher unit connector. 2. Check for continuity between terminal C(0) of the flasher Actlon Go to Step 7 Repair wiring harness (Hazard warning switch connector - GND) Switch OFF ON unit and ground. W: Continuity Terminal I Yes Turn off the hazard warning switch and go to I Continuity F 0 0 B 0 Action D 0 No Repair wiring harness (Flasher unit - Hazard warning switch) Gartner Banana

T LIGHTING SYSTEM FRONT TURN REAR TURN Step 9 1. Reconnect connector and turn the ignition switch to ON. 2. Set the turn signal switch to the right position and mea- sure voltage at terminal G(G/W) of the flasher unit con- -i nector. B+: Batterv ~ositive voltaae I Other I Replace flasher unit I Voltage 3. Set the turn signal switch to the left position and measure voltage at terminal D(G/B) of the flasher unit connector. Action B+: Battery positive voltage Alternates OV and B+ I Go to Step 10 I Voltage I Action I 1 Alternates OV and B+ 1 Go to Ste~ 10 1 I Other I Replace flasher unit I Step 10 1. Disconnect the turn signal light connectors. 2. Set the turn signal switch to the left or right position. 3. Measure the voltage at the terminals of the combination light connector. Light 1 Terminal I Voltage I I Alternates Front Alternates Front C (GIO) OV and B+ LH Alternates qyr I A (WB, I OV and B+ Ln I 1 Other - B+: Battery positive voltage Action I Go to Step 11 Go to Step 11 Go to Step 11 I Repair wiring harness (Flasher unit - Front combination liaht) Go to Step 11 I Repair wiring harness (Flasher unit - Rear combination light) 1. Turn the ignition switch to OFF. 2. Remove and check the bulbs. I Position I BUM I Action I Hazard warning 7 Hazard warning Bulb OK Burn OK Replace bulb Repair wiring harness (Front combination light - GND) Replace bulb Repair wiring harness (Rear combination light - GND) 4 Gartner Banana

LIGHTING SYSTEM T Symptom: Turn signals do not operate. (Hazard warning function operates normally.) J 45UOTX-I23 Step 1 Check the METER 15A fuse in the fuse block. Fuse 1 Action 1 I Burnt I Replace fuse after checking and repairing wirina harness I OK I GO to step 2 I Step 2 1. Turn the ignition switch to ON. 2. Measure voltage at terminal A(B/Y) of the combination switch connector. Other B+: Battery positive voltage Repair wiring harness (TURN fuse - Combination switch) Voltage B+ Step 3 Set the turn signal switch to ON (right or left) and mea- sure voltage at terminal C (GN) and terminal B(G/R) of the combination switch connector (&pin connector). Action Go to Step 3 B+: Battery positive voltage Terminal I Wire IVoltage 1 Action inspect combination switch (Refer to Daae T-20) Gartner Banana