lock MAZDA MX-5 1994 Workshop Manual

-01 ABS CONTHOL UNIT (Fa) 10-02 ABS HYDRAULIC UNIT (F) , WlRlNQ DIAQRAM -03 ABS HYDRAULIC UNIT 10-04 ABS WHEEL SPEED SENSOR LF(F) 10-05 ABS MEL SPEEO SENSOR W(F) 0 -06 ABS WHEEL SPEEO =ANTILOCK BRAKE SYSTEM SENSOR LR (R) 10-07 ABS WHEEL SPEED SENSOR RR(R) I I Gartner Banana

ANTILOCK BRAKE SYSTEM (ABS) P HYDRAULIC UNIT Removal 1 lnstallation 1. Disconnect the negative battery cable. - 2. Remove in the order shown in the figure, referring to Removal Note. 3. The only serviceable parts of the hydraulic unit are the valve relay and the motor relay. If there is a failure of any other part, replace the hydraulic unit assembly. 4. Install in the reverse order of removal, referring to Installation Note. 5. Add brake fluid, bleed the air, and check for fluid leakage. 1. Connectors 3. Nut bolts 2. Brake pipes 4. Hydraulic unit Removal / lnstallation Note . . . . page P-55 Gartner Banana

P ANTILOCK BRAKE SYSTEM (ABS) Disassembly 1 Assembly 1. Disassemble in the order shown in the figure. 2. Assemble in the reverse order of disassembly, referring to Assembly Note. 2.2-2.6 Nm [22-27 kgfcm, 2&29 [2--3,14--22) 6.9-9.8 Nm (70-1 00 kgfcm, 81-47 Inlbf) 1 15--25 11 S-2.5,11-18) 19-25 [1.92.6,14--19) t4.m [kgfm, Wlbf) 25uopx-o: 1. Nut, washer . 2. ABS bracket 3. Connector bolt 4. Gasket 5. Pipe joint 6. Bolt 7. Clip Installation Note 8. Cover 9. Motor relay ................... Inspection page P-56 10. Valve relay ................... Inspection page P-57 11. Casing 12. Mount 13. Stud ................. below 14. Nut, washer 15. Ground wire 16. Hydraulic unit Assembly note A SECTION A-A Clip Secure only the larger part of the wiring harness in the clips. The 2-pin connector part of the harness should re- main outside the clips. Gartner Banana

ANTILOCK BRAKE SYSTEM (ABS) P Removal I Installation note Brake pipes Caution Brake fluid will damage painted surfaces. If brake fluid does get on a painted surface, wipe it off im- mediately. Loosenltighten the brake pipes fromlto the hydraulic unit with the SST. 15UOPX-058 ABS CONTROL UNIT Removal I Installation 1. Disconnect the negative battery cable. 2. Roll back the carpet. 3. Remove in the order shown in the figure. 4. Install in the reverse order of removal. 1. Protecter 15UOPX-059 3. ABS control unit 2. Connector Gartner Banana

P ANTILOCK BRAKE SYSTEM (ABS) RELAYS Removal 1 Inspection / Installation 1. Disconnect the negative battery cable. 2. Remove in the order shown. 3. Inspect all parts and replace as necessary. 4. Install in the reverse order of removal. 1. Cover 3. Valve relay 2. Motor relay Inspection ................... page P-57 Inspection ....................... below lnspection Motor relay 1. Disconnect the negative battery cable. 2. Release the motor relay lock from the hydraulic unit and remove the motor relay. 3. Connect an ohmmeter and check for continuity at the relay terminals. Ground M: Indicates continuity 4. If continuity is not as specified, replace the motor relay. 5. If OK, check the wiring harness (Motor relay - Control unit main fuse [ABS 60A1). Gartner Banana

ANTILOCK BRAKE SYSTEM (ABS) Valve relay 1. Disconnect the negative battery cable. 2. Release the valve relay locks from the hydraulic unit and remove the valve relay. 3. Using an ohmmeter, check continuity of the relay termi- nals. m: Indicates continuity 4. If continuity is not as specified, replace the valve relay. Connect to a 0 12V - b Ground - d b 0 c d e - 0 0 Gartner Banana

ANTILOCK BRAKE SYSTEM (ABS) ABS WHEEL SPEED SENSOR (FRONT) Removal 1 Inspection / Installation 1. Removal in the order shown in the figure. 2. Install in the reverse order of removal. I. Connector 2. Bolts 3. Bolt 4. Wheel speed sensor lnspection . . . . . . . . . . . . . . . . . . . . . . . below Inspection Wheel speed sensor 1. Measure resistance between terminals of the wheel speed sensor. Resistance: 1 .&I .2 kQ 2. If not as specified, replace the wheel speed sensor. Gartner Banana

ANTILOCK BRAKE SYSTEM (ABS) P ABS SENSOR ROTOR (FRONT) Removal l Inspection / lnstallation 1. Inspect the ABS sensor rotor for missing and damaged teeth. Note The sensor rotor does not need to be removed unless you are replacing it. 2. Remove in the order shown in the figure, referring to Removal Note. 3. Install in the reverse order of removal, referring to lnstallation Note. 25UOPX-03 1. Wheel hub 2. ABS sensor rotor .......... Removal / Installation section M Removal Note ................... below Installation Note ................. below Removal note ABS sensor rotor Remove the sensor rotor from the wheel hub with the SST. lnstallation note ABS sensor rotor Press a new sensor rotor onto the wheel hub with the SST. Gartner Banana

ANTILOCK BRAKE SYSTEM (ABS) ABS WHEEL SPEED SENSOR (REAR) Removal 1 Inspection I Installation 1. Remove the filler pipe protector (left side). 2. Remove the spare tire (right side). 3. Remove in the order shown in the figure. 4. Install in the reverse order of removal. 1. Connector 2. Mud guard 3. Bolts 4. Wheel speed sensor lnspection . . . . . . . . . . . . . . . . . . . . . . . below lnspection Wheel speed sensor 1. Measure resistance between terminals of the wheel speed sensor. Resistance: 1 .O-1.2 kR 2. If not as specified, replace the wheel speed sensor. Gartner Banana

ANTILOCK BRAKE SYSTEM (ABS) P ABS SENSOR ROTOR (REAR) Removal / Inspection 1. Inspect the ABS sensor rotor for missing and damaged teeth. Note The sensor rotor does not need to be removed unless you are replacing it. 2. Remove in the order shown in the figure, referring to Removal Note. 25uopx-o: 1. Drive shaft 2. Sensor rotor Removal . :. . . . . . . . . . . . . . . . . . . section M Removal Note . . . . . . . . . . . . . . . . . . . below 3. Boot band and boot Removal note Sensor rotor Tap the sensor rotor off the drive shaft with a chisel. Gartner Banana