1994 MAZDA MX-5 brake

T LIGHTING SYSTEM Stoplight Switch Adjustment 1. Adjust the brake pedal height. (Refer to section P.) 2. Disconnect the stoplight switch connector. 4 3. Loosen the stoplight switch locknut. 4. Turn the stoplight switch until it contacts the pedal arm. Turn an additional 112 turn. 5. Tighten the locknut. Locknut tightening torque: 14-18 N.m (1.4-1.8 kgf-m, 120-156 in-lbf) I I I Brake pedal depress I 0 0 1 I Inspection Stoplight switch 1. Disconnect the stoplight switch connector. 2. Check for continuity between terminals of the switch. lnspection condition 3. If not as specified, replace the stoplight switch. Terminal A I B I Brake pedal released I m : Continuity Gartner Banana

LIGHTING SYSTEM T Symptom: Daytime running lights (DRL) do not illuminate. (Turn signals function normally.) DRL operate with engine running and following switches are off: Headlight switch Turn signal switch (Selected turn signal light flashes, other light remains illumi- nated) Hazard warning switch Parking brake switch (Parking brake released) Step 1 1. Position the vehicle on a flat surface and block the wheels to prevent vehicle movement. 2. Turn the ignition switch to ON. 3. Measure the voltage at the following terminal wires of the DRL control unit. 4. If correct, replace the DRL control unit. B+: Battery positive voltage Step 2 1. Disconnect the parking brake switch connector. 2. Check for continuity between the terminal of the switch and a body ground. Terminal J (L) u Connected to WIPER 20A fuse I(B) B (R) C (WIR) Parking brake lever Pulled one notch Continuity Yes Released Test condition Constant GND Parking brake switch Headlight switch No I 3. If not as specified, adjust or replace the parking brake switch. 4. If correct, repair wiring harness. (DRL control unit - Parking brake switch) Specification B+ Constant Parking brake released Headlight switch off Action Repair wiring harness (WIPER 20A - DRL control unit) Other B+ Other Repair wiring harness (DRL control unit - GND) Go to Step 2 Go to Step 3 Gartner Banana

T LIGHTING SYSTEM Step 3 1. Remove the column cover and disconnect the connec- tors of the headlight switch. 2. Check for continuity between the terminals of the head- Q light switch connector. Position I Terminal I I I I Headlight High beam I I 3. If not as specified, replace the combination switch. 4. If correct, repair wiring harness. (Headlight switch - DRL control unit) I Symptom: Daytime running lights (DRL) function does not cancel. OSUOTX-161 Headlight Low beam Step 1 1. Turn the ignition switch ON. 2. Verify the symptom by operating the following switches; the DRL should cancel. Go to the specified Step. Headlight switch. Hazard warning switch. Turn signal switch. Parking brake switch (lever pulled one notch). 0 1 0 0---0 : Continuity Symptom: DRL function not canceled when Headlight switch ON I Parking brake switch ON Step 5 I 05UOTX-163 Next Step Step 2 Hazard warning switch ON Turn signal switch ON Step 4 Step 4 4. If not as specified, go to Step 3. 5. If correct, replace the DRL control unit. Step 2 1. Turn on the ignition switch. 2. Turn on the headlight switch. 3. Check the voltage at the terminal wire C (WIR) of the DRL control unit connector. B+: Battery positive voltage J Terminal Voltage C (WIR) B+ Gartner Banana

LIGHTING SYSTEM T Step 3 1. Remove the column cover and disconnect the connec- tors of the headlight switch. 2. Check for continuity between the terminals of the head- light switch connector. Position I- Terminal 0---0: Continuity HL Headlight High beam Headlight Low beam 3. If not as specified, replace the combination switch. 4. If correct repair wiring harness. (Headlight switch - DRL control unit) B A 1. Turn on the ignition switch. 2. Turn on the headlight switch. 3. Check the voltage at the following terminal wires of the DRL control unit connector. 0 B+: Battery positive voltage I Terminal I Voltage I 0 I I 45UOTX-151 4. If not as specified, repair wiring harness. (Flasher unit - DRL control unit) 5. If correct, replace the DRL control unit. F (GIB) H (GN) Step 5 1. Turn on the ignition switch. 2. Pull the parking brake lever more than one notch. 3. Check the voltage at terminal wire B (R) of the DRL con- trol unit connector. Cycles B+ and OV Cycles B+ and OV 4. If not as specified, go to Step 6. 5. If correct, replace the DRL control unit. T-75 B+: Battery positive voltage I Terminal Voltage B IR1 B+ Gartner Banana

T LIGHTING SYSTEM r REAR COMBINATION LIGHT Disassembly 1. Use a hot air blower to soften the "hot melt" (bonding Turn signal switch (in combination switch) Front turn signal lights agent) around the lens. Step 6 1. Disconnect the parking brake switch connector. 2. Check for continuity between the terminal of the switch and ground. u T-19 T-64 2. Remove the lens from the light rear of the lens with a hammer I Parking brake lever Pulled one notch Released 45U0TX-153 4. If correct, repair wirring harness. (Parking brake switch - DRL control unit) Removal 1 Installation Refer to the following pages: housing by pushing the handle or round bar. Continuity Yes No Item Headlight switch (in combination switch) Hazard warning switch 3. Remove the old hot melt from the light housing. 3. If not as specified, adjust or replace the parking brake switch. Reference page T-19 T-21 Gartner Banana

T CRUISE CONTROL SYSTEM CRUISE CONTROL SYSTEM STRUCTURAL VIEW 1. Cruise control unit 2. Cruise actuator 3. Actuator cable 4. ParkINeutral switch 5. Brake switch 6. Cruise control main switch 7. Cruise control switch 8. Clutch switch Gartner Banana

CRUISE CONTROL SYSTEM B+: Battery Dositive voltage erminall Win color . . .. Action Connected to Cruise actuator Cruise actuator Test condition Main switch OFF Main switch ON Cruise A\actuator Specification Main switch OFF Main switch ON PCMT OV 9V Main switch OFF . Main switch ON Brake switch Go to Step 8 OV . 9V Ignition switch OFF lanition switch ON ParklNeutral switch Cruise control Main switch ON switch (Set switch and coast switch) Check main switch OV 9V - Brake pedal depressed Brake ~edal released Clutch switch Check main switch OV B+ Shift to "N" or "P" range Shift to other ranae Go to section K OV 9V Clutch pedal depressed Clutch pedal released Stoplight switch Go to Step 4 OV 5V Cruise control switch (Resume switch and accel switch) speed I While rotating rear tires I beMeenM,, sor Run I GO to Step 9 Go to section K OV B+ Brake pedal depressed Brake pedal released Cruise actuator I I I Battery 1 Constant I B+ I Repair wiring harness Go to Step 5 Main switch ON While turning resume switch after main switch ON B+ OV Main switch OFF Step 4 - Inspection of brake switch 1. Disconnect the brake switch connector. 2. Check for continuity between terminals of the switch. Go to Step 7 B+ OV OV GND 1 Constant Pedal position Go to Step 6 OV I Repair wiring harness Terminal A B 1 I Main switch ON 9V 45UOTX-19 Go to Step 8 3. If not as specified, replace the brake switch. 4. If the switch is OK, repair the wiring harness (fuse - brake switch - control unit). Pedal released Pedal depressed M: Continuity 0 0 Gartner Banana

CRUISE CONTROL SYSTEM T Inspection Procedure Self-diagnosis 1. Connect a 1.4W test light between terminals D and F, of the cruise control unit connector. Note There is no wire in terminal D of the connector. Push the test light through the connector and touch the cor- responding pin on the control unit. 2. Turn the ignition switch to ON. 3. Turn the cruise control on by pressing the MAlN switch. The MAlN indicator light will come on. 4. Press and hold the RESUMEIACCEL switch for more than 3 seconds. The test light will illuminate for 3 se- conds and go out for 2 seconds. 5. The on-board diagnosis system is activated and the test light will flash if there is a problem. Refer to the chart be- low to obtain the problem code number. Note The cruise control system will not operate in self-diag- nosis mode. 6. After retrieving the code(s), drive the vehicle at more than 16 kmlh (10 MPH) or press the MAlN switch to deactivate self-diagnosis. The MAlN indicator light will go off. 7. Follow the action corresponding to the problem code. Service Code Table If there are two or more problems in the system, the problem with the highest priority will be indicated. Priority Pattern of output signal ON 2 OFF n 4 OFF ON 5 OFF I No. Code I Possible cause Defective wiring (Cruise actuator- Cruise control unit, Stoplight switch-Cruise control unit) 01 Defective actuator Defective stoplight switch (For O5 1 Defective wiring (Fuse - Cruise control unit) Both stoplight and brake switch (for 07 vehicle and cruise) are ON simulta- neously Defective SETICOAST, or RESUMEIACCEL switch l5 1 Defective cruise control unit Action Repair harness lnspect actuator (Refer to page T-107) Inspect brake switch (Refer to page T-105) Replace fuse Repair harness Inspect stoplight and brake switch (Refer to pages T-105 and T-56) Inspect cruise control switch (Refer to page T-106) Go to troubleshooting Gartner Banana