clock MAZDA MX-5 1994 Repair Manual

SRS AIR BAG SYSTEM 1 Flowchart No.10 I Symptom I Service Code 34 I Possible cause Defective driver-side air bag module Defective clock spring Defective wiring harness Defective diagnostic module Step 1 Carry out "Before Servicing" procedure under GENER- AL PROCEDURES, page T-160. Step 2 Check if the pin B of the clock spring connector is broken. I Pin B I Action 1 I OK I GO to Step 3 I - -- -- - Broken I Replace wiring harness 1 Step 3 1. Install a 1 -ohm (rated power I W) resistor between termi- nals B and C of the passenger-side air bag module con- nector. 2. Connect the negative battery cable. 3. Turn the ignition switch to ON and check the service code. 1 Service code I Action 1 I Yes ( Replace wiring harness I 34 Other Go to Step 4 Go to Step 5 Step 4 1. Turn the ignition switch to LOCK. 2. Disconnect the negative battery cable. 3. Disconnect the diagnostic module connector. 4. Check for continuity between terminals 2F (GY) and 2D (GNV) of the diagnostic module connector. I Continuity I Action I No Replace diagnostic module (Refer to page T-208) Gartner Banana

T SRS AIR BAG SYSTEM 2-PIN CONNECTOR 45UOTX-30E Step 5 Warning Handling the air bag module improperly can acci- ii dently deploy the air bag, which may seriously in- jure you. Read SERVICE WARNINGS, page T-159, before handling the air bag module. 1. Turn the ignition switch to LOCK. 2. Disconnect the negative battery cable. 3. Remove the driver-side air bag module. (Refer to page T-206.) 4. Check if the pin B of the clock spring connector is broken. I Pin B I Action 1 OK I Go to Step 6 I Step 6 1. Connect the clock spring connector. 2. Check if the service code 34 still set. I Code 34 set I Action 1 Broken I Yes I Replace combination switch (Refer to paae T-19) Replace combination switch (Refer to page T-19) 1 -- - No Replace driver-side air bag module (Refer to page T-206) Gartner Banana

SRS AIR BAG SYSTEM T I Flowchart No.11 I Symptom Ice Code 35 Possible cause Defective passenger-side air bag module Defective wiring harness Defective diagnostic module Step 1 Carry out "Before Servicing" procedure under GENER- AL PROCEDURES, page T-160. Step 2 Check if the pin B of the passenger-side air bag module connector. Step 3 1. Install a 1 -ohm (rated power 1 W) resistor between termi- nals B and C of the clock spring connector. 2. Connect the negative battery cable. 3. Turn the ignition switch to ON and check the service code. Pin B OK Broken Action Go to Step 3 Redace wiring harness I Other 1 Replace passenger-side air bag module (Refer to oaae T-207) I Service code 35 Step 4 1. Turn the ignition switch to LOCK. 2. Disconnect the negative battery cable. 3. Disconnect the diagnostic module connector. 4. Check for continuity between terminals 2G (GN) and 2D (GMI) of the diagnostic module connector. Action Go to Step 4 I Continuitv - Action Yes No I Replace wiring harness Replace diagnostic module (Refer to page T-208) 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 2-PIN CONNECTOR I CLOCK SPRING Inspection Warning Handling the air bag module improperly can accl- dently deploy the air bag, which may seriously in- jure you. Read SERVICE WARNINGS, page T-159, before handling the air bag module. 1. Carry out "Before Servicing" procedure under GENER- AL PROCEDURES, page T-160. 2. Remove the Driver-side air bag module. (Refer to page T-206.) 3. Check for continuity between terminals of the clock spring. 4. If not as specified, replace the combination switch. (Refer to page T-18.) 5. Connect the blue and orange clock spring connectors. 6. Check if the pin B of the clock spring connector (harness- side) is broken. 7. If pin B is broken, replace the wiring harness. 8. Check if the pin B of the driver-side air bag module con- nector (on clock spring) is broken. 9. If pin B is broken, replace the combination switch. 10. Disconnect the diagnostic module connector. Terminals 11. Connect the blue and orange clock spring connectors. A 0 12. Check for continuity between terminals B and C of the clock spring. 13. If continuity exists, replace the combination switch. 1 0---0: Continuity B 0 C n 2A n 28 0 3A 0 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