battery MAZDA MX-5 1994 Workshop Manual

RELAY TIMER a 45UOTX-01 FLASHER UNIT Inspection 1. Turn the ianition switch to ON. RETRACTABLE HEADLIGHT RELAY Inspection 1. Disconnect the relay. 2. Apply battery positive voltage and check for continuity .- between terminals of the relay. B+: Batterv ~ositive voltaae Step -- -- M: Continuity Terminal A I H I G I B I D 1 2 3. If not as specified, replace the relay. 2. Operate the following switches and check the operation of the turn signal and hazard warning lights. 0 0 3. If not as specified, troubleshoot the circuit., 0 Switch Turn signal switch Hazard warning switch HAZARD WARNING SW - - 0 Procedure Right side ON Left side ON ON 0 B+ Operation Right turn signal lights flash Left turn signal lights flash All turn signal lights flash 0 GND V Gartner Banana

RELAY b TNS RELAY lnspection 1. Disconnect the relay. 2. Apply battery positive voltage and check for continuity between terminals of the relay. I B+: Battery positive voltage 3. If not as specified, replace the relay. O O- - - HORN RELAY lnspection 1. Disconnect the relay. 2. Apply battery positive voltage and check for continuity between terminals of the relay. B+: Battery positive voltage 45UOTX-016 I 1 Terminal I 0--0: Continuity Step 1 2 0--0: Continuity 3. If not as specified, replace the relay. 1 2 COOLANT FAN RELAY lnspection 1. Disconnect the relay. 2. Apply battery positive voltage and check for continuity between terminals of the relay. Terminal B+: Battery positive voltage A 0 C 0 Step W: Continuity 1 2 3. If not as specified, replace the relay. B B+ 0 B+ Terminal D GND 0 GND A 0 c 0 B I D 0 B+ 0 GND Gartner Banana

T RELAY REAR WINDOW DEFROSTER RELAY Inspection 1. Disconnect the relay. 2. Apply battery positive voltage and check for continuity between terminals of the relay. I 1 I I I 45UOTX419 I 2 0 0 B+ I GND I M: Continuity B+: Battery positive voltage Terminal 3. If not as specified, replace the relay. Step A 1 HEADLIGHT RELAY lnspection 1. Disconnect the relay. 2. Apply battery positive voltage and check for continuity between terminals of the relay. C 3. If not as specified, replace the relay. '. B+: Battery positive voltage Terminal B 0 Step 1 2 D 0 M : Continuity A 0 B+ B 0 GND C 0 D 0 Gartner Banana

T SWITCH IGNITION SWITCH Replacement 1. Disconnect the negative battery cable. 2. Remove the column covers. 3. Remove the screw and the ignition switch. 4. Install in the reverse order of removal. Inspection 1. Check for continuity between terminals of the switch. ACC 82 IG1 45UOTX-OX I Terminal 1 Position I B1 1 82 1 ACC I IG1 I IG2 I ST LOCK M: Continuity 2. If not as specified, replace the combination switch. Gartner Banana

SWITCH T COMBINATION SWITCH Removal 1 Installation 1. Disconnect the negative battery cable. - 2. Remove as shown in the figure. 3. Install in the reverse order of removal. Before installing the steering wheel, reset the clock spring connec- tor. COLUMN COVER TURN CLOCKWIS RETURN 2.75 TURNS - STEERING WHEEL / AIR BAG MODULE Clock spring connector adjustment 1. Set the front wheels straight ahead. 2. Turn the clock spring connector clockwise until it stops. Caution Do not force the front wheels straight ahead. 3. Return the connector 2.75 turns. 4. Align the marks on the clock spring connector and the outer housing. Gartner Banana

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

T INSTRUMENT CLUSTER Symptom: Water temperature gauge does not operate. 05UOTX-466 Preparation SST ( ) ... CANADA ONLY I 45UOTX-036 49 0839 285 Checker, fuel and thermometer 05UOTX-052 Step 1 1. Disconnect the water temperature sensor connector. 2. Connect the red lead of the SST to terminal A of the con- nector and the black lead to ground. 3. Turn the ignition switch to ON. 4. Set the SST to the resistance values shown in the figure. To get an accurate reading, wait 2 minutes after setting each value. 5. Verify that the water temperature gauge indicates the correct values. The allowable indication error is twice the width of the needle. For inspection of gauges Gauge display I Action Correct Incorrect I ( ) ... CANADA ONLY 45UOTX-038 T-26 Replace water temperature sensor Go to Step 2 Gauge display Correct Step 2 1. Remove the instrument cluster. (Refer to page T-29.) 2. Apply battery positive voltage to terminal 2K of the instrument cluster and connect terminal 2J of the instru- ment cluster to ground. 3. Connect the red lead of the SST to terminal 2L of the instrument cluster and the black lead to ground. 4. Set the SST to the resistance values shown in the figure. To get an accurate reading, wait 2 minutes after setting each value. 5. Verify that the water temperature gauge indicates the correct values. The allowable indication error is twice the width of the needle. Action Repair wiring harness (Instrument cluster - Water temperature sensor) I Incorrect I ReDlace water tem~erature aauae I Gartner Banana

INSTRUMENT CLUSTER T Symptom: Fuel gauge does not operate. L, Preparation SST Step 1 1. Disconnect the connector from the fuel gauge sender unit. 2. Connect the red lead of the SST to the A (Y) terminal wire and the black lead to ground. 3. Turn the ignition to ON. 49 0839 285 Checker, fuel and thermometer 4. Set the SST to the resistance values shown in the figure. To get an accurate reading, wait 2 minutes after setting each value. 5. Verify that the gauge indicates the correct values. The al- lowable indication error is twice the width of the needle. For inspection of gauges Gauge display Action I Step 2 1. Remove the instrument cluster. (Refer to page T-29.) 2. Apply battery positive voltage to terminal 2K and ground to terminal 2J. 3. Connect the red lead of the SST to terminal 1 A and the black lead to ground. Correct Incorrect 4. Set the SST to the resistance values shown in the figure. To get an accurate reading, wait 2 minutes after setting each value. 5. Verify that the gauge indicates the correct values. The al- lowable indication error is twice the width of the needle. Replace fuel gauge sender unit Go to Step 2 ( Gauge display I Action I Correct Incorrect Repakwiring harness (Instrument cluster - Fuel gauge sender unit) Replace fuel gauge Gartner Banana

T INSTRUMENT CLUSTER Symptom: Oil pressure gauge does not operate. 05UOTX-468 Preparation SST I 49 0839 285 For inspection of Checker, fuel gauges and thermometer Step 1 1. Disconnect the connector from the oil pressure sensor. 2. Connect the red lead of the SST to the A (YIR) terminal wire and the black lead to ground. 3. Turn the ignition switch ON. 4. Set the SST to the resistance values shown in the figure. To get an accurate reading, wait 2 minutes after setting each value. 5. Verify that the gauge indicates the correct values. The al- lowable indication error is twice the width of the needle. I Incorrect I GO to step 2 Gauge display Correct Step 2 1. Remove the instrument cluster. (Refer to page T-29.) 2. Apply battery positive voltage to terminal 2K and ground to terminal 2J. 3. Connect the red lead of the SST to terminal 26 and the black lead to ground. Action Replace oil pressure sensor 4. Set the SST to the resistance values shown in the figure. To get an accurate reading, wait 2 minutes after setting each value. 5. Verify that the gauge indicates the correct values. The al- lowable indication error is twice the width of the needle. Incorrect I Replace oil pressure gauge Gauge display Correct Action Repair wiring harness (Instrument cluster - Oil pressure sensor) Gartner Banana

T INSTRUMENT CLUSTER Standard indication (kmlhl I 80 I 80-84 45UOTX-047 1 Standard Indication 1 Allowable ranae I Allowable range (kmlhl Standard indication (MPH) 30 WATER TEMPERATURE GAUGE Preparation SST Allowable range (MPH) 30-32 SPEEDOMETER lnspection Note .-,' Tire wear and improper inflation will increase speedo- meter error. 1. Using a speedometer tester, check the speedometer for allowable indication error, and check the operation of the odometer. Replace if necessary. 2. Check the speedometer for fluctuation and/or abnormal noise. If there is fluctuation or if the speedometer does not move, remove and inspect the speedometer cable. If it is in good condition, replace the speedometer as- sembly. TACHOMETER lnspection 1. Connect a test tachometer to the engine, and start the engine. 2. Check the tachometer for allowable indication error. Re- place if necessary. lnspection 1. Remove the instrument cluster. (Refer to page T-29.) 2. Apply battery positive voltage to terminal 2K and ground to terminal 2J. 3. Connect the red lead of the SST to terminal 2L and the black lead to ground. 49 0839 285 Checker, fuel and thermometer For inspection of gauges ( ) ... CANADA ONLY I I 45UOTX-050 183R 2on (I sn) 4. Set the SST to the resistance values shown in the figure. To get an accurate reading, wait 2 minutes after setting each value. 5. Verify that the gauge indicates the correct values. The al- lowable indication error is twice the width of the needle. 6. If not as specified, replace the water temperature gauge. -/' Gartner Banana