wiring MAZDA MX-5 1994 Workshop Manual

SRS AIR BAG SYSTEM T i/ Possible cause Open circuit in wiring harness Damaged diagnostic module Flowchart No.7 Step 1 Carry out "Before Servicing" procedure under GENER- AL PROCEDURES, page T-160. Step 2 1. Disconnect the diagnostic module connector. 2. Check for continuity between terminal 2B (GNV) and 20 (GNV) of the diagnostic module connector. Symptom Continuity Action I Service Code 24 I Yes Replace diagnostic module (Refer to Daae T-208) - -- No I Replace wiring harness Gartner Banana

T SRS AIR BAG SYSTEM I Flowchart No.8 I Symptom I Service Code 32 I Possible cause a Defective driver-side air bag module a Defective clock spring Defective wiring harness a Defective diagnostic module Step 1 Carry out "Before Servicing" procedure under GENER- AL PROCEDURES, page T-160. Step 2 1. Install a jumper wire between terminals 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. I Other I Go to Step 3 I Service code 32 Step 3 Action Go to Step 4 Warning -- a Handling the air bag module improperly can acci- dently deploy the air bag, which may seriously in- jure you. Read SERVICE WARNINGS, page T-159, before handling the air bag module. Turn the ignition switch to LOCK. Disconnect the negative battery cable. Remove the driver-side air bag module. (Refer to page T-206.) Remove the jumper wire from the clock spring connector and connect the clock spring connector. Install a jumper wire between terminals B and C of the driver-side air bag module connector. Connect the negative battery cable. Turn the ignition switch to ON and check the service code. I Service code Action I 32 Replace combination switch (Refer to page T-19) Other Replace driver-side air bag module (Refer to page T-206) Gartner Banana

T SRS AIR BAG SYSTEM 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. Service Code 33 Flowchart No.9 Step 2 1. Install a 1 -ohm (rated power 1 W) resistor between termi- nals B and C of the clock spring connector. 2. Install a jumper wire between terminals B and C of the passenger-side air bag module connector. 3. Connect the negative battery cable. 4. Turn the ignition switch to ON and check the service code. I Service code Action I Symptom Step 3 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 33 Other (GNV) of the diagnostic module connector. ' Go to Step 3 Replace passenger-side air bag module (Refer to page T-207) i I N o I Replace wiring harness Continuity Yes Action Replace diagnostic module (Refer to page T-208) Gartner Banana

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

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

T SRS AIR BAG SYSTEM m~No.12Iy~m~torn I Service Code 41 Possible cause Poor connection of D-sensor connector Defective D-sensor Defective wiring harness Defective diagnostic module Step 3 1. Disconnect the suspect sensor connector. 2. Measure the resistance between terminal A of the sen- sor and ground. Measure I Action I Step 1 Carry out "Before Servicing" procedure under GENER- AL PROCEDURES, page T-160. Step 2 1. Disconnect the diagnostic module connector. 2. Measure the resistance between terminals 1C (BWG), 1 A (BWR), and 2L (BWB) of the diagnostic module con- nector and ground. 45UoTX-311 1.18kn Other - Resistance All , .18 kSL Other Replace wiring harness Replace sensor Action Replace diagnostic module (Refer to page T-208) Suspect sensor: Terminal 1 C -+ right D-sensor Terminal 1 A --+ Center D-sensor Terminal 2L -+ left D-sensor Go to Step 3 Gartner Banana

SRS AIR BAG SYSTEM i/ Possible cause Poor installation of right D-sensor Defective right D-sensor Defective wiring harness Defective diagnostic module Flowchart No.13 Step 1 Carry out "Before Servicing" procedure under GENER- AL PROCEDURES, page T-160. Step 2 1. Disconnect the diagnostic module connector. 2. Check for continuity between terminal 2J (BRN) of the diagnostic module connector and ground. I Continuity I Action 1 Symptom Service Code 44 Yes No I Yes I Replace wiring harness I Replace diagnostic module (Refer to page T-208) Go to Step 3 .I Step 3 1. Disconnect the right D-sensor connector. 2. Check for continuity between terminal B of the right D- sensor and ground. Continuity Action I No Replace right D-sensor (Refer to page T-210) Gartner Banana

T SRS AIR BAG SYSTEM I Flowchart No.14 1 Symptom I Service Code 45 Possible cause Poor installation of center D-sensor Defective center D-sensor Defective wiring harness Defective diagnostic module Step 1 Carry out "Before Servicingw procedure under GENER- AL PROCEDURES, page T-160. No Step 2 1. Disconnect the diagnostic module connector. 2. Check for continuity between terminal 2H (BWW) of the diagnostic module connector and ground. Continuity Action 1 Replace center D-sensor (Refer to page T-210) I - . - No 1 Go to Step 2 I Yes Step 3 1. Disconnect the center D-sensor connector. 2. Check for continuity between terminal B of the center D- sensor and ground. I Continulty Action I Replace diagnostic module (Refer to Dane T-2081 I I Yes I Replace wiring harness I 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.15 Step 1 Carry out "Before Servicing" procedure under GENER- AL PROCEDURES, page T-160. Step 2 1. Disconnect the diagnostic module connector. 2. Check for continuity between terminal 2E (BR) of the diagnostic module connector and ground. Symptom I Continuity I Action I 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. Yes No Replace diagnostic module (Refer to page T-208) Go to Step 3 I No Replace left D-sensor (Refer to page T-210) Continuity Yes Action Replace wiring harness Gartner Banana

T SRS AIR BAG SYSTEM I Flowchart No.16 I Symptom I Service Code 51 I Possible cause Blown internal fuse in diagnostic module (fault conditions no longer present) 0 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 harnesses 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. 36EOTX-143 Gartner Banana