1994 MAZDA MX-5 check engine

ROAD TEST (Hold) shift diagram LOCKUP AVAILABLE WHEN COASTING 818 718 - 618 - 518 ' 418 - 3/8 ' 218 - 118 - 018 0 20 (1 2) 40 (25) 60 (37) 80 (50) 100 (63) 120 (75) 140 (87) 160 (99) VEHICLE SPEED kmh {mph} Noise and Vibration Drive the vehicle in 2nd (Hold) and listen closely for any out of the ordinary noise or vibration. The torque converter, propeller shift, and differential can be sources of abnormal noise and vibration if they are not functioning properly. Check these when searching for sources of noise and vibration. L-RANGE TEST Shift Pattern For this test it is not necessary to inspect shift shock and shift points, since they are almost exactly the same as those for the D-range test. However, in the D-range (Normal) shift diagram, the shift points are different. ,, In L-range, the shift patterns for Normal mode are the same. 1. Shift the selector lever to L-range and select the Normal mode. 2. Accelerate the vehicle and verify that 1-2 up and downshifts are obtained, and that no third gear, no fourth gear, and no lockup are obtained. 3. Drive in 1 st gear, then decelerate and verify that engine braking effect is felt. 4. While driving in D-range (Hold mode) and third gear, shift the selector lever to L-range and verify that third gear is held until the 3-2 downshift point as shown in the L-range (Hold) shift diagram, and that 2nd gear is held until 2-1 downshift point is achieved. 5. Accelerate the vehicle in L-range (Hold mode) and verify that 1 st gear is held. L-range (Power) shift diagram LOCKUP AVAILABLE WHEN COASTING o 20 (12) 40 (25) 60 (37) 80 (50) 100 163) i 20 (75) 14dp7) 160 pgj VEHICLE SPEED kwh {mph) Gartner Banana

K ELECTRICAL SYSTEM COMPONENTS ELECTRICAL SYSTEM COMPONENTS PREPARATION SST 49 GO1 8 904 Sheet 49 9200 162 Monitor, Engine Signal - 49 DO1 9 902 Adapter Harness For inspection of powertrain control module (transmission) terminal voltage For inspection of powertrain control module (transmission) terminal voltage p@ HOLD For inspection of powertrain control module (transmission) terminal voltage HOLD SWITCH lnspection lnspection of operation 1. Turn the ignition switch from OFF to ON. 2. Verify that the hold indicator light is not illuminated. De- press the hold switch and verify that the hold indicator -J light illuminates. 3. If not as specified, check the terminal voltage of the hold switch. lnspection of voltage 1. Remove the front console. 2. Turn the ignition switch ON. 3. Measure voltage at the hold switch connector. B+: Battery positive voltage Position (V): Voltage Normal (V) Depressed (V) 4. If not as specified, check the continuity of the hold switch. Connector terminal A B+ 0 B 0 0 Gartner Banana

ELECTRICAL SYSTEM COMPONENTS K I POWERTRAIN CONTROL POWERTRAIN CONTROL MODULE (TRANSMISSION) lns~ection 1. kemove the powertrain control module (Transmission). (Refer to page K-45.) 2. Disconnect the control module connectors. 3. Connect the SSTs (Engine Signal Monitor and Adapt- er Harness) to the powertrain control module (Transmis- sion) as shown. 4. Place the SST (sheet) on the Engine Signal Monitor. 5. Turn the ignition switch ON. 6. Measure the terminal voltage at each terminal. 7. If any control module terminal voltage is incorrect, check the related input of output devices and wiring. If no prob- lem is found, replace the powertrain control module (Transmission). Caution Applying voltage to terminals A and B of this SST will damage the SST. Gartner Banana

K TRANSMISSION 52. Apply ATF to a new O-ring and install it onto the vehicle speed pulse generator. 53. Apply locking compound to the mounting bolt threads, then install the vehicle speed pulse generator. Tightening torque: 7.9-10.7 N-m (80-110 kgtcm, 70-95.4 inmlbf) 54. Apply ATF to the new O-rings and install them into the transmission case. 55. Install the lockup control solenoid. 56. Rotate the manual shaft fully rearward; then return it two notches to the N position. 57. Loosely tighten the parwneutral switch nuts. 58. Remove the screw on the switch body and move the parklneutral switch so that the screw hole on the switch body is aligned with the small hole inside the switch. - Check their alignment by inserting a 2.0mm (0.0079 in) diameter pin into the holes. 59. Tighten the switch attaching nuts. 60. Remove the pin, and tighten the screw into the hole. Tightening torque: 5.0--6.8 Nem (50-70 kgfecrn, 44-60 in-lbf) 61. Ensure that the torque converter is installed correctly by measuring the distance (A) between the end of the torque converter and the end of the converter housing. "A": 22.5mm (0.89 in) 62. Remove the transmission from the engine stand. Gartner Banana

SHIFT MECHANISM (WITH SHIFT-LOCK SYSTEM) K POSSlBLt TO SHIFT c3 BRAKEPEDAL DEPRESSED 45UOKX42! EMERGENCY OVERRIDE BUTTON '
+ I SHIFT TO P RANGE 1 SHIFT-LOCK lnspection 1. Turn the ignition switch to ON engine OFF. 2. Verify that the selector lever is in P range. 3. Without the brake pedal depressed, verify that the selec- tor lever cannot be shifted from P range. 4. Depress the brake pedal and verify that the selector le- ver can be shifted from P range. 5. If not as specified, check the P range switch continuity andlor shift-lock actuator terminal voltage and continu- ity. (Refer to pages K-159.) EMERGENCY OVERRIDE BUTTON lnspection 1. Verify that the engine is off. 2. Verify that the selector is locked in P range. 3. Remove the indicator panel cover with the screwdriver as shown. 4. Insert the screwdriver into the emergency override hole, push down, and verify that the selector lever can be shifted from P range. 5. If not as specified, inspect and repair as necessary, re- ferring to the Troubleshooting diagnosis chart. (Refer to pages K-155.) KEY INTERLOCK lnspection 1. Turn the ignition switch to ON engine OFF. 2. Shift the selector lever to R range. 3. Verify that the ignition key cannot be turned to the LOCK position. 4. Shift the selector lever to P range. 5. Verify that the ignition key can be turned to the LOCK position. 6. If not as specified, inspect and repair as necessary, re- ferring to Troubleshooting. (Refer to pages K-155.) KEY INTERLOCK SOLENOID lnspection 1. Disconnect the negative battery cable. 2. Remove the column cover. 3. Disconnect the key interlock solenoid connector. 4. Insert the ignition key in the key cylinder. 5. Apply battery voltage between terminals 6 and C, and verify that the solenoid operates. 6. If not as specified, replace key interlock solenoid. 7. Connect the key interlock solenoid connector. 8. Install the column cover. 9. Connect the negative battery cable. Gartner Banana

ENGINE SPEED SENSING POWER STEERING N TROUBLESHOOTING GUIDE (CONT'D) Possible Cause I Problem Abnormal noise from steering system Loose oil pump Loose steering gear Loose oil pump bracket Drive belt loosettight Air in system Malfunctioning steering gear Malfunctioning oil pump Obstruction near steering column or pressure hose Loose steering linkage Worn steering joints Action Tighten Tighten Tighten Adjust Bleed air Replace Replace Repair or replace Tighten or replace Replace PageISection section B N-25 N- 9 N- 9 25UONX41 AIR BLEEDING 1. Check the fluid level. (Refer to page N-22.) 2. Turn the steering wheel fully to the left and right several times with the engine not running. 3. Recheck the fluid level. If it has dropped, add fluid. 4. Repeat steps 2 and 3 until the fluid level stabilizes. 5. Start the engine and let it idle. 6. Turn the steering wheel fully to the left and right several times. 7. Verify that the fluid is not foamy and that the fluid level has not dropped. 8. Add fluid if necessary, and repeat steps 6 and 7. Gartner Banana

N ENGINE SPEED SENSING POWER STEERING Caution Never hold the steering wheel to the extreme left or right for more than five seconds with the engine running. This could damage the power steering d pump- 8. Turn the steering wheel fully to the left and right and measure the fluid pressure generated by the gear hous- ing. If the pressure is not within specification, replace the gear housing assembly. Gear housing fluid pressure: 7,601--8,335 kPa (77.545.0 kgflcm2, 1,103-1,208 psi) 9. Remove the gauge set. Install and tighten the pressure hose to the specified torque. Tightening torque: 3247 N.m (3.24.8 kgf.m, 24--34 ft.lbf} 10. Bleed the air from the system. (Refer to page N-21.) STEERING WHEEL AND COLUMN Obtain the code number and deactivate the audio anti- theft system before disconnecting the battery. (Refer to section T.) On-vehicle Inspection -1 Steering wheel effort 1. With the vehicle on a hard, level surface, put the wheels in the straight-ahead position. 2. Start the engine and warm the power steering fluid to 50--60°C (1 22-1 40°F). 3. With the engine running at idle, attach a pull scale to the outermost point of the steering wheel spoke. Then, starting with the wheels in the straight-ahead posi- tion, measure the effort required to turn the steering wheel to the left and to the right. Steering wheel effort: 2635 N (2.63.6 kgf, 5.3-7.9 Ibf) (during one turn of the steering wheel) 2 4. If not within specification, check the following: fluid level, air in system, fluid leakage at hose or connections, func- tion of oil pump and steering gear, and tire pressure. Gartner Banana

ENGINE SPEED SENSING POWER STEERING N STEERING GEAR AND LINKAGE Removal / Installation 1. Turn the wheels to the straight-ahead position. 2. Loosen the wheel lug nuts. 3. On level ground, jack up the front of the vehicle and support it on safety stands. 4. Remove the wheels. Note Turning the steering wheel while the steering gear is removed will make reinstallation difficult. Do not turn the steering wheel while the steering gear is removed. If the steering wheel is turned in that condi- tion, the clockspring connector may have to be adjusted. (Refer to section T.) 5. Remove in the order shown in the figure, referring to Removal Note. 6. With the wheels in the straight-ahead position, install in the reverse order of removal. 7. Tighten all necessary bolts and nuts to the specified torque. 8. After installation: (1) Check for fluid leakage. (Refer to page N-22.) (2) Bleed air from the system. (Refer to page N-21.) (3) Adjust the front wheel alignment. (Refer to section R.) 1. Cotter pin 5. Pressure pipe 2. Nut ~emovai Note ............... page N-26 3. Tie-rod endlsteering knuckle 6. Return hose Removal Note ............... page N- 7 7. Mounting bracket bolt 4. Bolt 8. Steering gear and linkage Gartner Banana