1994 MAZDA MX-5 brake light

SHIFT MECHANISM (WITH SHIFT-LOCK SYSTEM) K TROUBLESHOOTING Circuit Diagram - 1-21 AT SHIFT-LOCK SYSTEM Diagnosis chart Problem -- Selector lever cannot be moved from P range with brake pedal depressed and ignition switch ON Possible cause ROOM 1 OA fuse burned or not installed METER 10A fuse burned IG1 system malfunction Wire harness broken Poor connection IG 80A fuse burned Ignition switch malfunction Stop light switch remains OFF Stop light system malfunction Wire harness broken Poor connection STOP 15A fuse burned P range switch remains OFF P range switch system malfunction Wire harness broken (poor ground) Poor connection Shift-lock actuator malfunction Wire harness broken Poor connection Misadjustrnent of selector lever or improper assembly of shift-lock actuator Action I Page Repair or replace Connect firmly Replace Install or replace Replace K-155 K-155 Repair or replace K-155 Connect firmly K-155 Replace K-155 Inspect and replace Adjust or replace section T section T Repair or replace Connect firmly Inspect and replace Repair or replace Connect firmly Adjust or repair K-155 K-I55 K-155 K-155 K-159 Gartner Banana

K ' SHIFT MECHANISM (WITH SHIFT-LOCK SYSTEM) Problem Possible cause Selector lever can be ROOM 1OA fuse burned or not installed moved lrom nnp. [stop light switch remains ON with ignition switch ON, but without brake pedal I Shift-lock actuator malfunction depressed Misadjustment of selector lever or improper assembly of shift-lock actuator Selector lever can be ROOM 10A fuse burned or not installed range Ignition switch malfunction with ignition switch OFF and brake pedal de- Shift-lock actuator malfunction pressed Misadjustrnent of selector lever or improper assembly of shift-iock actuator Shift-lock actuator op- P range switch remains ON eration heard when brake pedal depressed ' Misadjustment of selector lever or improper assembly with ignition switch ON of shift-lock actuator in other than P range Action -- Install or replace Adjust or replace lnspect and replace Adjust or replace Install or replace Inspect and replace inspect and replace Adjust or replace Inspect and replace Adjust or replace section T K-159 Selector lever remains locked when emergency override button oper- ated Emergency override button not pushed fully down Broken emergency override button lgnitlon key can be turned to lock position with selector lever in other than P range Push down fully and hold emergency override but- Misadjustment of indicator pedal ROOM 10A fuse burned or not installed Key interlock solenoid malfunction Wire harness broken Poor connection P range switch remains ON P range switch system malfunction Wire harness broken Poor connection lnspect and replace Repair or replace Connect firmly Adjust Install or replace K-161 - K-151 Inspect and replace Repair or replace Connect firmly I lanition kev cannot be I P ranae switch remains OFF I lns~ect and replace 1 K-158 I K-159 K-166 K-166 Key cylinder (push switch) malfunction Wire harness broken Poor connection Key interlock unit malfunction I ~~~~~$1~~~~ I Key iierlock solenoid malfunction I' I I Inspect and replace I K-158 I range Inspect and replace Repair or replace Connect firmly Inspect and replace Key cylinder (push switch) malfunction I Inspect and replace I section T section T K-155 K-155 section T I I Misadjustment of selector lever 1 Adjust I K-160 ] Gartner Banana

K SHIFT MECHANISM (WITH SHIFT-LOCK SYSTEM) CONNECTOR B CONNECTOR A 3. Lift up slightly on the selector lever, selector sleeve, and indicator panel, and disconnect the hold switch connec- tor. 4. Disconnect the HOLD switch connector. .--' 5. Shift the selector lever to P range. 6. Turn the ignition switch ON, and check terminal voltages and continuity, referring to the chart below. Disconnect the shift-lock actuator connector to check continuity be- tween terminal c (harness side) and ground. 7. If not as specified, repair the wiring harness and/or shift- lock actuator. I ~~UOKX-477 B+: Battery positive voltage I Connector I Terminal connectd to l terminal I Condition I Correct measurement vaive I I 1 I I A a B-C I P range, selector lever release button not depressed I OR I lBl e I B I P ranae, selector lever release button not depressed I OV I A B B B B 8. Grasp the HOLD switch wiring harness and pull it while pushing the selector knob down fully onto the selector le- ver. 9. Connect the HOLD switch connector. 10. Adjust the indicator panel. (Refer to page K-161.) Install the screws in the order shown in the figure. 11. Apply locking compound to the selector knob screw threads after the threads have been cleaned. Tighten the screws. Tightening torque: 2.0-2.9 N-m (20-30 kgf-cm, 18-26 in-lbf) b a b C (harness side) d 12. Install the rear console. 13. Connect the negative battery cable. 14. Verify correct operation of the shift-lock system. B-C B-C B-C Body B-C Constant Ignition switch OFF Ignition switch ON Constant Brake pedal released -t depressed OR B+ El+ on OV -+ B+ -1 Gartner Banana

SHIFT MECHANISM (WITH SHIFT-LOCK SYSTEM) K BUTTON NEED NOT BEDEPRESSED BUTTON MUST BE DEPRESSED 0.9--1.0mm 0.64.7mm i0.035--0.039 in} (0.024-0.028 in) I 0.5-0.6mm (0.02-0.024 in) 45UOKX-48 HEAVY-GAUGE WIRE , SLIDER '22EEL SELECTOR LEVER Inspection 1. Verify that the selector lever can only be shifted as shown in the figure. When shifting from P range, do so with the ignition switch ON and the brake pedal de- pressed. 2. Verify there is a click at each range when shifted from P -+ L range. 3. Verify that the positions of the selector lever and the indi- cator are aligned. 4. Verify that the button returns smoothly when pushed to shift. Adjustment Lever position 1. Disconnect the negative battery cable to deactivate the shift-lock. 2. Remove the rear console, selector knob, selector sleeve, and indicator panel. (Refer to "Shift-lock actuator inspection"; page K-159, steps 1-45.) 3. Loosen the locknut. 4. Shift the transmission to P range by pushing the adjust- ment lever forward. 5. Adjust the lever so that the clearance between the guide plate and the guide pin in P range with the push rod light- ly depressed is as shown. 6. Tighten the locknut. Tightening torque: 18-24 Nem (1.8-2.5 kgf-m, 14--18 ft-lbf) 7. Move the selector lever to N and D ranges and verify that there is the same clearance between the guide plate and the guide pin. 8. If not as specified, readjust the lever. 9. lnstall the indicator panel, selector sleeve, selector knob, and rear console in the reverse order of removal. 10. Check the selector lever operation. (Refer to "lnspec- tion"; page K-161.) Indicator panel 1. Remove the rear console. 2. Shift the selector lever to P range. 3. Loosen the indicator screws. 4. Align the alignment hole in the slider with the hole in the indictor panel. Install suitable heavy-gauge wire to hold the slider. 5. Tighten the indicator mounting screws in the order shown in the figure. 6. Remove the wire from the slider. 7. Verify that the selector lever properly aligns with the indi- cator in each range. 8. Verify correct operation of the emergency override but- ton. Gartner Banana

BRAKE SYSTEM P CLEARANCE BRAKE PEDAL On-vehicle Inspection Pedal height Verify that the distance from the center of the upper surface of the pedal pad to the carpet is as specified. Pedal height: l7l-l8l mm (6.93-7.13 in} (With carpet) Adjustment 1. Disconnect the stoplight switch connector. 2. Loosen locknut@ and turn switch @ until it does not con- tact the pedal. 3. Loosen locknuts @I and turn rod 0 to adjust the height. 4. Adjust the pedal free play and tighten operating rod lock- nuts @I. 5. Turn the stoplight switch until it contacts the pedal; then turn an additional 1 /2 turn. Tighten the locknuts. Tightening torque: 14--18 N.m (1.4--1.8 kgf-m, 10-13 ft-lbf) 6. Connect the stoplight switch connector. 7. Verify that the stoplight operates correctly. Pedal play 1. Depress the pedal a few times to eliminate the vacuum in the system. 2. Lightly depress the pedal by hand until resistance is felt, and check the free play. Free play: 4--7mm (0.16-4.28 in) Adjustment 1. Loosen locknuts @I and turn rod to adjust the free play. 2. Check the pedal height and verify that the stoplight switch operates correctly. Tightening torque: 24--34 N.m (2.4--3.5 kgf-m, 17-25 ft-lbf} Pedal-to-floor clearance 1. Verify that the distance from the floor panel to the center of the upper surface of the pedal pad is as specified when the pedal is depressed with a force of 589 N (60 kgf, 132 Ibf}. Pedal-to-floor clearance: 95mm (3.74 in} (Without carpet) 2. If the distance is less than specified, inspect for air in the brake system. Gartner Banana

BRAKE SYSTEM P I I TOUCHING 1 T~~H,IN~ I ADJUSTING NUT 97GOPX-O Removal note Brake pipe Cautlon Brake fluid will damage painted surfaces. If brake fluid does get on a painted surface, wipe it off im- mediately. 1. Modify the brake pipe tightening torque to allow for use of a torque wrench-SST combination. (Refer to section GI) "Torque Formulas" 2. Disconnect~connect the brake pipe fromlto the master cylinder by using the SST. 3. Tighten the brake pipe by using the SST. Tightening torque: 13--22 N-m (1 3-2.2 kgf-m, 9.4--16 ft-lbf) Installation note Master cylinder Inspect the push rod clearance as follows. 1. Turn the nut of the SST clockwise to fully retract the SST gauge rod. Attach the SST to the power brake unit. Tightening torque: 9.8-15.7 N.m (1 .&I .6 kgf.m, 7.2-11.6 ft4bf) 2. Apply 66.7 kPa (500 mmHg, 19.7 inHg) vacuum using a vacuum pump. 3. Turn the adjusting nut of the SST counterclockwise until the gauge rod just contacts the push rod end of the power brake unit. Push lightly on the end of the gauge rod to be sure it is seated. Verify that there is no gap between the adjusting nut and SST body. Gartner Banana

BRAKE SYSTEM CLEARANCE (0) CLEARANCE (C) CLEARANCE (B) 4. Remove the SST from the power brake unit without dis- turbing the adjusting nut. Set the SST onto the master cylinder as shown in the figure. -J Caution When pushing only use enough pressure to bot- tom the rod in the piston. If too much pressure is applied a false reading will occur. 5. Push lightly on the end of the SST gauge rod to be sure it is bottomed in the master cylinder piston, but do not push so hard that the piston mores. Note Any clearance between the SST body and the adjusting nut (clearance B) or between the body and the master cylinder (clear- ance C). Adjust the push rod as necessary as outlined in "Adjustment" below. I Measurement 1 Push rod I I Clearance at (B) I Too short I Adjustment The threads of the push rod are specially designed so that the bolt becomes harder to turn past a certain point. This is to prevent the bolt from coming loose. Turn the bolt only within this range when adjusting. Clearance at (C) No clearance at (B) or (C) '.A Clearance at B 1. Push lightly on the end of the SST gauge rod, and mea- sure the clearance between the adjusting nut and the SST body. Too long OK 2. Using the SST, turn the nut to lengthen the power booster push rod an amount equal to the clearance mea- sured at B. Clearance at C 1. Measure and record height Dl of the gauge rod. Gartner Banana

P BRAKE SYSTEM k FIRST PEDAL VACUUM GAUG DEPRESSION FORCE GAUGE POWER BRAKE UNIT Quick Inspection, On-vehicle Power brake unit function check (Simple method) ii Step 1 1. With the engine stopped, depress the pedal a few times. 2. With the pedal depressed, start the engine. 3. If immediately after the engine starts the pedal moves down slightly, the unit is operating. Step 2 1. Start the engine and let it run 1 or 2 minutes. 2. Stop the engine. 3. Depress the pedal with the usual force. 4. If the first pedal stroke is long and becomes shorter with subsequent strokes, the unit is operating. 5. If a problem is found, inspect for damage or improper connection of the check valve or vacuum hose. Repair if necessary, and inspect it once again. Step 3 1. Start the engine. 2. Depress the pedal with the usual force. 3. Stop the engine with the pedal depressed. 4. Hold the pedal down for about 30 seconds. 5. If the pedal height does not change, the unit is operating. ,, 6. If there is a problem, check for damage or improper con- nection of the check valve or vacuum hose. Repair if necessary, and check once again. If the nature of the problem is still not clear after following the 3 steps above, follow the more detailed check described in "Method using tester," below. (Method using tester) Connect the SST, vacuum gauge, and pedal depression force gauge as shown in the figure. After bleeding the air from the SST, conduct the test as described in the 3 steps below. Inspection using gauges Connect the SST gauges, a vacuum gauge (A), and a pedal depression gauge (B) as shown. Bleed the air from the SST gauges before performing the following tests. a) Checking for vacuum loss Unloaded condition 1. Start the engine. 2. Stop the engine when the vacuum gauge indicates 66.7 kPa (500 mmHg, 19.7 inHg). 3. Observe the vacuum gauge for 15 seconds. If the gauge indicates 63.4-66.6 kPa (475-500 mmHg, ,, 18.7-19.7 inHg), the unit is operating. Gartner Banana