1994 MAZDA MX-5 sensor

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

T SRS AIR BAG SYSTEM Step 9 1. Disconnect the left D-sensor connector. 2. Check for continuity between terminal B of the left D-sen- sor and ground. il I Continuity I Action I Step 10 Check for continuity between terminal 1 C (BRIG) of the diagnostic module connector and ground. I Continuity Action 1 Yes No I Yes I GO to step 11 Replace D-sensor and then replace diagnos- tic module Replace air bag harness and then replace diagnostic module Step 11 1. Disconnect the right D-sensor connector. 2. Check for continuity between terminal B of the right No D-sensor connectoiand ground. Replace diagnostic module (Refer to page T-208) Continuity Action Replace D-sensor and then replace diagnos- tic module Replace air bag harness and then replace I Flowchart No.15 I Symptom 1 Service Code 51 I Possible cause Blown internal fuse in diagnostic module (fault conditions no longer present) Diagnostic module not replaced after service code 13 set and conditions corrected Intermittent short in air bag deployment circuit Remedy If repairs were made for a service code 13, replace the diagnostic module. If an intermittent short is sus- pected, inspect the wiring harnesses and connectors for damage. If they are not damaged, wiggle the harness and connectors to induce the intermittent short; service code 13 will be set when the fault is induced. Then follow the troubleshooting procedure for service code 13. Gartner Banana

SRS AIR BAG SYSTEM Possiblecause Defective wiring harness Defective S-sensor Defective diagnostic module Flowchart No.16 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 1 H (GIB) of the diagnostic module connector and ground. Continuity Action I Symptom Yes I Go to Step 3 I Service Code 52 Step 3 1. Disconnect the orange and blue S-sensor connectors. 2. Check for continuity between terminal B of the S-sensor and ground. No Replace diagnostic module (Refer to page T-208) I No 1 Re~lace wirina harness I Continuity Yes Action Replace S-sensor (Refer to page T-213) Possible cause Internal failure of diagnostic module Flowchart No.17 Remedy Replace the diagnostic module. (Refer to page T-208.) Symptom Service Code 53 Gartner Banana

T SRS AIR BAG SYSTEM CRASH SENSOR (D-SENSOR) Removal 1 Installation 1. Carry out "Before Servicing" procedure under GENERAL PROCEDURE, page T-160. 2. Remove in the order shown in the figure. 3. Install in the reverse order of removal. 1. Upper seal boards 2. Cover 3. Bolts d 4. Crash sensor (D-sensor, center) Installation note . . . . . . . . . . . page T-189 Gartner Banana

SRS AIR BAG SYSTEM T 1. Mud guard 2. Cover 3. Bolts 4. Crash sensor (D-sensor, right) ........... Installation note page T-212 1. Mud guard 4. Crash sensor (D-sensor. left) 2. cove? 3. Bolts -, Installation ............... page T-212 T-211 Gartner Banana