1994 MAZDA MX-5 fuse chart

SHIFT MECHANISM (WITH SHIFT-LOCK SYSTEM) K TROUBLESHOOTING Circuit Diagram - 1-21 AT SHIFT-LOCK SYSTEM Diagnosis chart Problem -- Selector lever cannot be moved from P range with brake pedal depressed and ignition switch ON Possible cause ROOM 1 OA fuse burned or not installed METER 10A fuse burned IG1 system malfunction Wire harness broken Poor connection IG 80A fuse burned Ignition switch malfunction Stop light switch remains OFF Stop light system malfunction Wire harness broken Poor connection STOP 15A fuse burned P range switch remains OFF P range switch system malfunction Wire harness broken (poor ground) Poor connection Shift-lock actuator malfunction Wire harness broken Poor connection Misadjustrnent of selector lever or improper assembly of shift-lock actuator Action I Page Repair or replace Connect firmly Replace Install or replace Replace K-155 K-155 Repair or replace K-155 Connect firmly K-155 Replace K-155 Inspect and replace Adjust or replace section T section T Repair or replace Connect firmly Inspect and replace Repair or replace Connect firmly Adjust or repair K-155 K-I55 K-155 K-155 K-159 Gartner Banana

CRUISE CONTROL SYSTEM T Inspection Procedure Self-diagnosis 1. Connect a 1.4W test light between terminals D and F, of the cruise control unit connector. Note There is no wire in terminal D of the connector. Push the test light through the connector and touch the cor- responding pin on the control unit. 2. Turn the ignition switch to ON. 3. Turn the cruise control on by pressing the MAlN switch. The MAlN indicator light will come on. 4. Press and hold the RESUMEIACCEL switch for more than 3 seconds. The test light will illuminate for 3 se- conds and go out for 2 seconds. 5. The on-board diagnosis system is activated and the test light will flash if there is a problem. Refer to the chart be- low to obtain the problem code number. Note The cruise control system will not operate in self-diag- nosis mode. 6. After retrieving the code(s), drive the vehicle at more than 16 kmlh (10 MPH) or press the MAlN switch to deactivate self-diagnosis. The MAlN indicator light will go off. 7. Follow the action corresponding to the problem code. Service Code Table If there are two or more problems in the system, the problem with the highest priority will be indicated. Priority Pattern of output signal ON 2 OFF n 4 OFF ON 5 OFF I No. Code I Possible cause Defective wiring (Cruise actuator- Cruise control unit, Stoplight switch-Cruise control unit) 01 Defective actuator Defective stoplight switch (For O5 1 Defective wiring (Fuse - Cruise control unit) Both stoplight and brake switch (for 07 vehicle and cruise) are ON simulta- neously Defective SETICOAST, or RESUMEIACCEL switch l5 1 Defective cruise control unit Action Repair harness lnspect actuator (Refer to page T-107) Inspect brake switch (Refer to page T-105) Replace fuse Repair harness Inspect stoplight and brake switch (Refer to pages T-105 and T-56) Inspect cruise control switch (Refer to page T-106) Go to troubleshooting Gartner Banana

SRS AIR BAG SYSTEM T Service Code Table (With passenger-side air bag) Possible cause Flowchart No. Poor connection of diagnostic module priority connector Open circuit or poor connection of power source circuit code Output signal (Air bag system warning light) Remains ON Damaged D-sensor (D-sensor ON) 2 Poor installation of S-sensor Damaged S-sensor (S-sensor ON) 12 5 22 OFF OFF Open connection in S-sensor feed circuit S-sensor diagnosis circuit open High resistance or open circuit in driver- 8 32 OFF side air bag module circuit High resistance or open circuit in pas- senger-side air bag module circuit Low resistance in driver-side air bag module circuit I 11 1 35 ION- OFF b Low resistance in passenger-side air bag module circuit Open circuit between diagnostic module 10 and D-sensor - Poor installation of right D-sensor 113 144 ION- OFF 34 OFF Poor installation of center D-sensor 14 I 15 1 46 ION- OFF Poor installation of left D-sensor 45 System-down fuse burnt OFF 1 17 1 52 ( ON ml flk OFF Damaged back-up battery Damaged diagnostic module I 18 I 53 IoNm[~ OFF Poor connection of all D-sensor 19 I I I w Note If two or more troubles exist in the air bag system, the warning light indicates the cause of the trouble with the highest priority. T-163 99 Flashes quickly and continuously Gartner Banana

SRS AIR BAG SYSTEM T Possible cause Defective diagnostic module Defective S-sensor Defective wiring harness Step 1 Carry out "Before Servicing" procedure under GENER- AL PROCEDURES, page T-160. Service Code 12 Flowchart No.2 Step 2 Check the EGI IJN fuse. Symptom I Fuse I Action I Step 3 1. Disconnect the diagnostic module connector. 2. Connect the negative battery cable. 3. Measure the voltage at terminal 1 L (WIG) of the diagnos- tic module connector. OK Burnt B+: Battery positive voltage Voltage Action I Go to Step 3 Go to Step 4 Step 4 1. Disconnect the diagnostic module connector. 2. Check for continuity between terminal 1L (WIG) of the diagnostic module connector and ground. B+ Other Replace diagnostic module Repair wiring harness (EGI INJ fuse - Diagnostic module) I NO I GO to Step 5 I Continuity Yes Step 5 Check for continuity between terminal 1H (GIB) of the diagnostic module connector and ground. Continuity I Action Action Repair wiring harness (EGI INJ fuse - Diag- nostic module) and replace the fuse Yes ( Go to Step 6 No Replace diagnostic module (Refer to page T-208) 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

T SRS AIR BAG SYSTEM Possible cause ij Defective diagnostic module Defective wiring harness Defective S-sensor Step 1 Carry out "Before Servicing" procedure under GEN- ERAL PROCEDURES, page T-1 60. Service Code 12 Flowchart No.3 Step 2 Check the ENGINE fuse. Fuse Action I Symptom Step 3 1. Disconnect the diagnostic module connector. 2. Connect the negative battery cable. 3. Measure the voltage at terminal 1 L (WIG) of the diagnos- OK Burnt tic module connector. Go to Step 3 Go to Step 4 B+: Battery positive voltage - Other Repair wiring harness iEGI INJ fuss-Diaanostic module1 I Voltage B+ -- ~ Action Replace diagnostic module (Refer to page T-208) I NO Replace diagnostic module (Refer to Daae T-2081 Step 4 1. Disconnect the diagnostic module connector. 2. Check for continuity between terminal 1 H (GIB) of the diagnostic module connector and ground. Step 5 1. Disconnect the orange and blue S-sensor connectors. 2. Check for continuity between terminal 2C (G) of the diag- nostic module connector and ground. 1 Continuity Action 1 Continuity Yes Action Go to Step 5 Yes No Replace wiring harness Go to Step 6 L Gartner Banana

SRS AIR BAG SYSTEM Step 6 Check for continuity between terminal 1H (G/B) of the diagnostic module connector and ground. I Flowchart No.4 I Symptom I Service Code 21 I Continuity Yes I No I Replace S-sensor (Refer to page T-213) I Action Replace air bag wiring harness and EGI INJ fuse Possible cause Defective S-sensor Defective wiring harness Defective diagnostic module 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 E (RIB) of the diagnostic module connector and ground. I Continuitv Action 1 Yes Replace diagnostic module (Refer to page T-208) I NO I GO to step 3 Step 3 1. Disconnect the orange and blue S-sensor connectors. 2. Check for continuity between terminal A of the S-sensor and ground. Continuity 1 Action I 1 yes I Replace wiring harness I I No I Replace S-sensor (Refer to page T-213) I 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