battery MAZDA MX-5 1994 Workshop Manual

T SRS AIR BAG SYSTEM Possible cause ij Defective diagnostic module Defective wiring harness Defective S-sensor Step 1 Carry out "Before Servicing" procedure under GEN- ERAL PROCEDURES, page T-1 60. Service Code 12 Flowchart No.3 Step 2 Check the ENGINE fuse. Fuse Action I Symptom Step 3 1. Disconnect the diagnostic module connector. 2. Connect the negative battery cable. 3. Measure the voltage at terminal 1 L (WIG) of the diagnos- OK Burnt tic module connector. Go to Step 3 Go to Step 4 B+: Battery positive voltage - Other Repair wiring harness iEGI INJ fuss-Diaanostic module1 I Voltage B+ -- ~ Action Replace diagnostic module (Refer to page T-208) I NO Replace diagnostic module (Refer to Daae T-2081 Step 4 1. Disconnect the diagnostic module connector. 2. Check for continuity between terminal 1 H (GIB) of the diagnostic module connector and ground. Step 5 1. Disconnect the orange and blue S-sensor connectors. 2. Check for continuity between terminal 2C (G) of the diag- nostic module connector and ground. 1 Continuity Action 1 Continuity Yes Action Go to Step 5 Yes No Replace wiring harness Go to Step 6 L Gartner Banana

SRS AIR BAG SYSTEM T L Possible cause Flowchart No.8 Defective air bag module Defective clock spring Defective wiring harness Defective diagnostic module Warning Handling the air bag module improperly can accidently deploy the air bag, which may seri- ously injure you. Read SERVICE WARNINGS, page T-159, before handling the air bag module. Symptom Step 1 Carry out "Before Servicing" procedure under GEN- ERAL PROCEDURES, page T-1 60. Service Code 32 Step 2 1. Remove the air bag module. 2. Install a 1 -ohm (rated power 1 W) resistor between termi- nals B and C of the air bag module connector. 3. Connect the negative battery cable. 4. Turn the ignition switch to ON and check the service code. 1 Other I Replace air baa module (Refer to paae T-206) I Service code 32 Step 3 1. Disconnect the clock spring connector. 2. Install a 1-ohm (rated power 1 W) resistor between termi- nals B and C of the clock spring connector. 3. Connect the negative battery cable. 4. Turn the ignition switch to ON and check the service code. I Service code Action I Action Remove 1 -ohm resistor and go to Step 3 I 32 I Remove 1 -ohm resistor and ao to Ste~ 4 I 1 Other Replace combination switch (Refer to page T-19) Step 4 1. Turn the ignition switch to LOCK. 2. Disconnect the negative battery cable. 3. Disconnect the diagnostic module connector. 4. Measure the resistance between terminals 2D (GNV) and 2F (GY) of the diagnostic module connector. Resistance 1 R More than 1R Action Replace diagnostic module (Refer to page T-208) Replace wiring harness Gartner Banana

T SRS AIR BAG SYSTEM I Flowchart No.9 I Symptom I Service Code 34 I Possible cause Defective air bag module Defective clock spring Defective wiring harness Defective diagnostic module Warning Handling the air bag module improperly can accidently deploy the air bag, which may seri- ously injure you. Read SERVICE WARNINGS, page T-159, before handling the air bag module. Step 1 Carry out "Before Servicing" procedure under GEN- ERAL PROCEDURES, page T-1 60. Step 2 1. Remove the air bag module. 2. Make sure the shorting bars at the diagnostic module connector, clock spring connectors, and air bag module are properly installed. Note An engaged shorting bar or poorly mated connector can cause code 34 to set. 3. Connect the negative battery cable. 4. Turn the ignition switch to ON and check the service code. -- Step 3 1. Turn the ignition switch to LOCK. 2. Disconnect the clock spring connector. 3. Turn the ignition switch to ON and check the service code. Service code 32 34 Action Replace air bag module (Refer to page T-206) Go to Step 3 Step 4 1. Turn the ignition switch to LOCK. 2. Disconnect the negative battery cable. 3. Disconnect the diagnostic module connector. 4. Measure the resistance between terminals 2D (GNV) and 2F (GY) of the diagnostic module connector. Service code 32 Action Replace combination switch (Refer to page T-19) 1 Less than 1 R I Replace wiring harness I Resistance 1 a Action Replace diagnostic module (Refer to page T-208) d Gartner Banana

SRS AIR BAG SYSTEM Possible cause Defective air bag module Defective clock spring Ddfective S-sensor Defective D-sensor Defective diagnostic module Defective wiring harness Service Code 13 Flowchart No.14 Note When fault code 13 sets, the air bag unit blows an internal non-replaceable thermal fuse to prevent accidental deployment of the air bag. The air bag unit must be replaced once code 13 has set, but should not be replaced until the cause for the fault is repaired. Symptom Step 1 Carry out "Before Servicing" procedure under GEN- ERAL PROCEDURES, page T-1 60. Step 2 1. Remove the air bag module. 2. Install a 1 -ohm (rated power 1 W) resistor between termi- nals B and C of the air bag module connector. 3. Connect the negative battery cable. 4. Turn the ignition switch to ON and check the service d 1 code. 1 Other I Go to Step 3 Service code 51 Step 3 1. Turn the ianition switch to LOCK. Action Replace air bag module and then replace diagnostic module 2. ~isconnegt the diagnostic module connector. 3. Check for continuity between terminal 2F (GY) of the diagnostic module connector and ground. I Continuity Action 1 Step 4 1. Disconnect the clock spring connector. 2. Check for continuity between terminal 2F (GY) of the diagnostic module connector and ground. Yes No Continuity Yes Go to Step 4 Go to Step 6 Gartner Banana

SRS AIR BAG SYSTEM DRIVER-SIDE AIR BAG MODULE Removal I Installation Warning 4 Handling the air bag module improperly can accidently deploy the air bag, which may serious- ly injure you. Read SERVICE WARNINGS, page T-159, before handling the air bag module. 1. Carry out "Before Servicing" procedure under GENERAL PROCEDURES, page T-160. 2. Remove in the order shown in the figure. 3. Install in the reverse order of removal. 4. Follow the troubleshootina flowchart (page T-160) to verify that the air bag system is operating normally. 1. Bolts 2. Support rope 3. Driver-side air bag module Installation note . . . . . . . . . . . . . . . . . below Installation note Driver-side air bag module 1. Connect the blue and orange clock spring connectors. 2. Connect the negative battery cable. 3. Turn the ignition switch to ON and verify that service code 32 is set. 4. If another service code is set, troubleshoot the system. 5. If service code 32 is set, turn the ignition switch to OFF and disconnect the negative battery cable. 6. Disconnect the orange and blue clock spring connec- tors. 7. Install the driver-side air bag module. Gartner Banana

SRS AIR BAG SYSTEM T PASSENGER-SIDE AIR BAG MODULE Removal I Installation b Warning Handling the air bag module improperly can accidently deploy the air bag, which may serious- ly injure you, Read SERVICE WARNINGS, page T-159, before handling the air bag module. 1. Carry out "Before Servicing" procedure under GENERAL PROCEDURES, page T-160. 2. Remove the glove compartment. 3. Remove in the order shown in the figure. 4. Install in the reverse order of removal. 1. Bolts 2. Support rope 3. Passenger-side air bag module Installation note . . . . . . . . . . . . . . . . . below Installation note Passenger-side air bag module 1. Connect the blue and orange clock spring connectors. 2. Connect the negative battery cable. 3. Turn the ignition switch to ON and verify that service code 33 is set. 4. If another service code is set, troubleshoot the system. 5. If service code 33 is set, turn the ignition switch to OFF and disconnect the negative battery cable. 6. Disconnect the orange and blue clock spring connec- tors. 7. Install the driver-side air bag module. Gartner Banana

SRS AIR BAG SYSTEM T AIR BAG MODULE DISPOSAL PROCEDURE Before scrapping a vehicle with an undeployed air bag module, deploy the air bag. Never dispose of a live air bag module. If the deployment tool SST is not available, consult the nearest Mazda representa- i/ tive for assistance. 46UOTX-908 Air Bag Deployment 1. Move the vehicle to an open space, away from strong winds, and open all of the vehicle's doors. 2. Deactivate the audio antitheft system, if installed. (Refer to page T-120.) 3. Disconnect the negative battery cable. 4. Follow the appropriate procedure for the driver-side or passenger-side air bag module. Driver-side air bag module (1 ) Make sure the air bag module is firmly mounted to the steering wheel. (2) Remove the lower panel. (3) Disconnect the orange and blue clock spring con- nectors. (4) Inspect the SST. (Refer to page T-217.) (5) Connect the SST to the clock spring connector as shown in the figure. Passenger-side air bag module (1) Remove the glove compartment. (2) Disconnect the orange and blue passenger-side air bag module connector. Gartner Banana

T SRS AIR BAG SYSTEM GREEN LIGHT -+@ @ . ACTIVATION SWITCH RED ' LIGHT (3) Inspect the SST (Refer to page T-217.) (4) Connect the SST to the air bag module. 5. Connect the red clip of the SST to the positive battery ter- minal and the black clip to the negative terminal. 6. Verify that the red light on the SST is illuminated. 7. Make sure all persons are standing at least 6 m (20 ft} from the vehicle. 8. Press the activation switch on the SST to deploy the air bag. Air Bag Disposal Warning The air bag is very hot immediately after it de- ploys. You can be burned. Do not touch the air bag module for at least 15 minutes after deployment. Warning Pouring water on a deployed air bag is danger- ous. The water will mix with the residual gases to form a gas that can make breathing difficult if in- haled. Do not pour water on the deployed air bag module. Warning A deployed air bag module may contain deposits of sodium hydroxide, a caustic by-product of the gas-generated combustion. If this substance gets in your eyes or on your hands, it can cause irrita- tion and itching. When handling a deployed air bag module, wear gloves and safety glasses. 1. Put on gloves and safety glasses. 2. Place the deployed air bag module in a plastic bag, seal it, and then dispose of it. 3. Wash your hands after removing your gloves. Gartner Banana

SRS AIR BAG SYSTEM T INSPECTION OF SST (DEPLOYMENT TOOL) Use the SST (deployment tool) to deploy a live air bag module before disposing of it. Before connecting the SST to the clock spring connector or air bag module connector, inspect operation b of the SST. CONNECTOR B CONNECTOR A STEP 1 RED @ STEP 2 ACTIVATION SWITCH I 29UOTX-357 lnspection Procedure 1. Inspect operation of the SST by following the steps be- low. 1 1 3 1 Press activation switch I ON I OFF I - Connect connectors A and B of ST 2. If not as specified, do not use the SST because it may cause the air bag to unexpectedly deploy upon connec- tion to the module. Connect red clip to positive bat- tery terminal and black clip to nenative battery terminal OFF ON OFF OFF Gartner Banana

TROUBLESHOOTING u TROUBLESHOOTING GUIDE I Symptom Blower motor does not operate Reference page Below Magnetic clutch does not operate I U-7 Condenser fan does not operate e Symptom: Blower motor does not operate I U-9 Insufficient cooling No cooling Intermittent cooling Normal operation of blower motor Blower motor speed is controlled by the fan switch and a resistor in the blower unit. When the fan switch L is in the OFF position, the motor ground circuit is open and the blower motor does not operate. When the switch is in the first (Low) position, current flow from the blower motor is restricted by the three resis- tors in the resistor, and the blower motor turns at low speed. Changing the fan switch to the second (Mid), third (high), or fourth (Super-high) position causes the cir- cuit resistance to decrease, and the blower motor speed becomes correspondingly faster. I l U-10 (-1 (rn) I I I RESET BUTTON FUSE BLOCK Step 1 1. Check the circuit breaker. 2. If the reset button is not out, go to Step 2. 3. If the reset button is out, check for a short circuit in the harness. Repair as necessary; then depress the reset button to reset the circuit breaker. circuit breaker HEATER Step 2 1. Turn the ignition switch to ON. 2. Turn the fan switch to the fourth position. 3. Measure the voltage at the A terminal wire of the blower motor connector. B+: Battery positive voltage I Terminal I Voltage Action I Amperage 30A Location Fuse block A U-5 Bt Other Go to Step 3 Repair wiring harness (Circuit breaker - Blower motor) Gartner Banana