1994 MAZDA MX-5 cruise control

T SWITCH 1 FLASHER UNlT TR CRUISE CONTROL UNlT u Inspection 1. Disconnect the negative battery cable. 2. Remove the knee protector. 3. Disconnect the combination switch connector. i 4. Check for continuity between the terminals described by using an ohmmeter. 5. If the continuity is not as specified, replace the combina- tion switch as an assembly. Lights, dimmer, and passing switch Position Low beam Headlight High beam Passing Tail, Parking W: Continuity Turn signal switch Terminal E I HL I HU (TNSJHEADI BA I B I Switch m: Continuity Left Right Windshield wiper and washer switch O--O : Continuity d Terminal 0 0 Cruise control switch FU I TL TR 0 0 I Position SETICOAST RESUME/ACCEL Terminal SE I RE W: Continuity 0 E 0 0 0 ,i Gartner Banana

nia (i' [-I PACL LIGHT '-6 1.4k HEATER CDNTRCL CONTROL X3 SWITCH SWITCH ILLMI1UATIONS 1 -a? .ILLUMINATION LIGHTS WARNING I CRUISE CCNTQOL ILLVMINATION -0l PANEL LIGHT CONTROL SWITCH (I1 I 1-02 HEATER CONTROL SWITCH ILLGMINA~IONS (11 11-03 ASHTRAY ILLUMINATION (I) H-06 AT SELECT ILLUMINATION(II I -07 HAZARD WAWING AND RETRACTOFi SWITCH ILLUMINATION(II I-oz CRUISE CONTROL MAIN snITcn ILLWINATION (11 E-10 FRONT FOG LIGHT ANO REAR WIMOW DEFROSTER SUITCH ILLUMINATION (I) I 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 T CIRCUIT DIAGRAM Gartner Banana

T CRUISE CONTROL SYSTEM TROUBLESHOOTING Before troubleshooting the system, check the following items: 1. Is the customer using the system correctly? 2. Is the fuse burnt? If it is, replace it after checking and repairing the wiring harness. d Symptom: Vehicle speed cannot be set. (Cruise control unit will not hold vehicle speed.) 45UOTX-189 ("pj") SRUISE MAIN Step 1 1. Turn the ignition switch ON. 2. Turn the cruise control main switch ON. 3. Check that the main switch indicator light comes ON. 4. If the light does not come ON, go to Step 2. 5. If the light comes ON, go to Step 3. Step 2 1. Check for continuity between the terminals of the cruise control main switch. Neutral OFF I Position M: Continuity 2. If not as specified, replace the switch. 3. If the switch is OK, repair the wiring harness. (METER 15A fuse - Cruise control main switch - GND) Terminal A~B~D~F~G~H Step 3 1. Measure the voltage at the following terminal wires of the cruise control unit connector. Disconnect the CIS control unit connector before measuring the voltage at terminal J. 2. If all terminal voltage are OK, replace the cruise control unit. -- / 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

T CRUISE CONTROL SYSTEM ~~UOTX-195 3. If not as specified, replace the clutch switch. 4. If the switch is OK, repair the wiring harness (fuse - clutch switch - control unit). w B A CRUISE CONTROL UNIT I Step 5 - lnspection of clutch switch 1. Disconnect the clutch switch connector. 2. Check for continuity between terminals of the switch. I RESUMUACCEL I 0 I 0 I m: Continuity Step 6 - lnspection of cruise control switch 1. Remove the knee protector and disconnect the com- bination switch connector. 2. Check for continuity between terminals of the combina- tion switch connector. ./ 3. If not as specified, replace the cruise control switch. 4. If the switch is OK, repair the wiring harness (cruise con- trol switch - control unit). Pedal position Pedal released Pedal depressed Switch Step 7 - lnspection of stoplight switch 1. Disconnect the stoplight switch. 2. Check for continuity between terminals of the switch. W: Continuity Terminal Terminal A 0 SE Pedal position 3. If not as specified, replace the stoplight switch. 4. If the switch is OK, repair the wiring harness (cruise con- trol unit - stoplight switch). B 0 RE I E Terminal A B i Pedal released Pedal depressed m: Continuity 4 0 0 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