1994 MAZDA MX-5 Workshop Manual

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 T LJ Possible cause Poor connection of D-sensor connector Defective D-sensor Defective wiring harness Defective diagnostic module Flowchart No.10 Step 1 Carry out "Before Servicing" procedure under GEN- ERAL PROCEDURES, page T-1 60. Step 2 1. Disconnect the diagnostic module connector, 2. Measure the resistance between terminals 2L (BR/B) and 2E (BR) of the diagnostic module connector. Symptom Service Code 41 1 Other I Go to Ste~ 3 I Resistance 1.18 kn Action Go to Step 4 11.18 kn I I Redace wirina harness I Step 3 1. Disconnect the left D-sensor connector. 2. Measure the resistance between terminals A and B of the left D-sensor connector. Resistance Step 4 Measure the resistance between terminals 2H (BW) and 1 A (BR/R) of the diagnostic module connector. Action I Other I Resistance Action I Replace left 0-sensor (Refer to page T-210) 1.18 kn Other Go to Step 6 Go to Step 5 Step 5 1. Disconnect the center D-sensor connector. 2. Measure the resistance between terminals A and B of the center D-sensor. Resistance 1.18 kn Other Action Replace wiring harness Replace center D-sensor (Refer to page T-210) T-197 Gartner Banana

T SRS AIR BAG SYSTEM Step 6 Measure the resistance between terminals 2J (BRN) and 1 C (BRIG) of the diagnostic module connector. I Resistance I Action I - Step 7 1. Disconnect the right D-sensor connector. 2. Measure the resistance between terminals A and B of 1.18 kR Other the right-D-sensor. Replace diagnostic module (Refer to page T-208) Go to Step 7 Resistance 1.18 WZ Action Replace wiring harness Other Replace right D-sensor (Refer to page T-210) Gartner Banana

SRS AIR BAG SYSTEM T L Possible cause Poor installation of right D-sensor Defective right D-sensor Defective wiring harness Defective diagnostic module Step 1 Carry out "Before Servicing" procedure under GEN- ERAL PROCEDURES, page T-1 60. Service Code 44 Flowchart No.11 Symptom Step 3 1. Disconnect the right D-sensor connector. 2. Check for continuity between terminal B of the right D-sensor and ground. I Continuity I Action Step 2 1. Disconnect the diagnostic module connector. 2. Check for continuity between terminal 2J (BRN) of the diagnostic module connector and ground. 1 Yes I Replace wiring harness Continuity Yes No Action Replace diagnostic module (Refer to page T-208) Go to Step 3 No Replace right D-sensor (Refer to page T-210) Gartner Banana

T SRS AIR BAG SYSTEM Possible cause Poor installation of center D-sensor Defective center D-sensor Defective wiring harness Defective diagnostic module Flowchart No.12 Step 1 Carry out "Before Servicing" procedure under GEN- ERAL PROCEDURES, page T-1 60. Step 2 1. Disconnect the diagnostic module connector. 2. Check for continuity between terminal 2H (BRAN) of the diagnostic module connector and ground. Symptom Service Code 45 Step 3 1. Disconnect the center D-sensor connector. 2. Check for continuity between terminal B of the center D-sensor and ground. Continuity Yes No I Continuitv I Action I Action Replace diagnostic module (Refer to page T-208) Go to Step 2 Yes I Replace wiring harness I No Replace center D-sensor (Refer to page T-210) Gartner Banana

SRS AIR BAG SYSTEM T Possible cause Poor installation of left D-sensor Defective left D-sensor Defective wiring harness Defective diagnostic module Flowchart No.13 Step 1 Carry out "Before Servicing" procedure under GEN- ERAL PROCEDURES, page T-1 60. Step 2 1. Disconnect the diagnostic module connector. 2. Check for continuity between terminal 2E (BR) of the diagnostic module connector and ground. Symptom Service Code 46 Step 3 1. Disconnect the left D-sensor connector. 2. Check for continuity between terminal B of the left D-sen- sor and ground. Continuity Yes No Action Replace diagnostic module (Refer to page T-208) GO to Step 3 Replace left D-sensor (Refer to page T-210) I Continuity Yes Action Replace wiring harness 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 T Step 5 1. Disconnect the orange and blue S-sensor connectors. 2. Check for continuity between terminal C of the S-sensor and ground. Continuity Action 1 Yes Step 6 Check for continuity between terminal 1A (BFUR) of the diagnostic module connector and ground. Replace S-sensor and then replace diagnos- tic module No Replace wiring harness and then replace diag- nostic module - - I NO I Go to Step 8 Continuity Step 7 1. Disconnect the center D-sensor connector. 2. Check for continuity between terminal B of the center D-sensor and ground. Action I Continuitv Action 1 Yes I GO to ~te~ 7 Step 8 Check for continuity between terminal 2L (BR/B) of the diagnostic module connector and ground. Yes No -- Replace center D-sensor and then replace diagnostic module Replace wiring harness and then replace diag- nostic module I NO I GO to Step 10 Continuity Yes Action Go to Step 9 Gartner Banana