ignition MAZDA MX-5 1994 Workshop Manual

T SRS AIR BAG SYSTEM Step 4 1. Turn the ignition switch to LOCK. 2. Disconnect the negative battery cable. 3. Connect the blue and orange passenger-side air bag d module connectors. 4. Connect the negative battery cable. 5. Turn the ignition switch to ON and check the service code. I Service code I Action I I 13 Replace passenger-side air bag module (Refer to page T-207) I I mer I Replace driver-side air bag module (Refer to ~aae T-2061 I No I Go to Step 6 Step 5 1. Turn the ignition switch to LOCK. 2. Disconnect the diagnostic module connectors. 3. Check for continuity between terminal 2F (GY) of the diagnostic module connector and ground. Step 6 Check for continuity between terminal 2G (GN) of the diagnostic module connector and ground. I Continuity Action d Continuity Yes Step 7 Check for continuity between terminal 20 (GNV) of the diagnostic module connector and ground. Action Replace wiring harness Yes No Replace wiring harness Go to Step 7 I NO I GO to Step 9 ~d Continuity Yes Action Go to Step 8 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

SRS AIR BAG SYSTEM T 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 2D (GMI) and 2F (GY) of the diagnostic module connector. Action 45UOTX-301 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

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

Possible cause u 0 Burnt air bag warning light bulb Defective diagnostic module Defective wiring harness Step 1 Carry out "Before Servicing" procedure under GEN- ERAL PROCEDURES, page T-1 60. Air bag system warning light does not illuminate for 6 seconds Flowchart No.1 Step 2 1. Disconnect the diagnostic module connector. 2. Turn the ignition switch to ON. 3. Check the air bag warning light. I Llght condition I Action 1 Symptom 1 Illuminate I Replace diagnostic module (Refer to ~aae T-208) 1 -- I Not illuminate I GO to step 3 J Step 3 1. Remove the instrument cluster. 2. Check the air bag system warning light bulb. I Repair wiring harness (Diagnostic module--Instrument cluster) I Bulb Burnt Action Replace bulb .- 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