horn MAZDA MX-5 1994 User Guide

:-2 .BACK-UP LIGHTS .HORN .STOPLIGHTS .HIGH-MOUNT STOPLIGHT MAIN FUSE BLOCK MAIN BUB TRAOE NUMBER ma-u~ LIGHTS: 11% (~WI Ix-oal OoA FUSE BLOCK \ ,, HIGH-HOUNT STOPLIGHT: 921 (l8.4W) STOP STRIGHTS: 1157 (27Wl PARK/NEUTRAL W/R (F) << IX-MI 15* FUSE BLOCK W/G IF) 0 F-O2k=zz& hORN RELAY F-03 G/O (F) STOR IGHT -5t SWITCH F-03 BACK-LP G/R LIGHT SWITCH OATA LINK PASSENGER-SIOE CONNECTOa (F) AIR BAG MOOWE (SECTION U! R/G (F) z:zzzz::zzzz:zz: G/R IF) F-0.551 HORN 0RIVE;I-SIOE AIR BAG MOOULE . E-19 E-20 A B B (R) (Rl A - VW REAR COnsINATION LIGHT F-05 HORN (F) F-06 PASSENGER-SIDE AIR BAG MXIULE(F) I U j-03 ORIVER-SIOE S-W PASSENGER-SIOE A:R BAG nrrmE (F) AIR BAG MX)UE (F) Gartner Banana

MAIN FUSE @LOCK MAIN EUE TRADE NUMBER W (F) EACX-uP LIGHTS: 1156 (2%) Ix-oal FUSE BLOCK U ,, HIGH-MOUNT STOPLIGHT: Q1 (18.4W) STOP STCRIMTS: 1157 (27WI PARK/NEUTRAL W/R (F) - SWITCH OoA [X-031 Ix-olll 15A (SECTION H-1) FUSE ELDCK WG (F) 1 MTER 0 L (Fl HORN RELAY G/O (F) STOPLIGHT -12 SWITCH OWERTRAIN ONTROL ACK-UP G/R IGHT AT DATA LINK PASSENGER-SIDE CONNECTW RUISE CONTROL UNIT AIR BAG MOOVLE (SECTION U) m38 ::::s::t::z:::== R/G IF) t G/R G/O t I (F) (Fl G T I R/G G I I (R) (R) R/G G [R) (R) (R) 0, WW REAR COMBINATION LIGHT .BACK-UP LIGHTS .HORN .STOPLIGHTS 1 HIGH-MOUNT STOPLIGHT 1 :-06 PASSENGER-SIOE AIR 8AG HOOULE (F) U i-04 PASSENGER-SIDE AIR BAG MOWLE (F) Gartner Banana

T HORN HORN STRUCTURAL VIEW 1. Horn T-84 2. Horn relay 3. Horn switch Gartner Banana

1 mw GRIVER-SIDE AIR BAG MOOULE :-2 SWITCH [a-. .BACK-UP LIGHTS .HORN .STOPLIGHTS .HIGH-MOUNT STOPLIGHT 1 REAR COHeINATION LIGHT '-05 HORN (F) S-03 DRIVEA-SIDE AIR BAG mlDlhE (F) :-06 PASSENGER-SIDE AIR BAG WDULE (F) j-04 PASSENGER-SIDE AIR BAG WOULE (F) Gartner Banana

T HORN Symptom: Horn does not sound. 05UOTX-191 Step 1 1. Check the STOP 15A fuse. 2. If the fuse is burned, replace it. Check and repair the wire harness, if necessary. 3. If the fuse is OK, go to Step 2. Step 2 1. Disconnect the horn connector. 2. Apply battery positive voltage to the horn, and check if the horn sounds. 3. If the horn sounds, go to Step 3. 4. If the horn does not sound, replace the horn. Step 3 1. Remove the knee protector. 2. Ground the terminal B (GIO) of the horn relay connector. 3. If the horn sounds, go to Step 4. 4. If the horn does not sound, go to Step 6. Step 4 1. Disconnect the negative battery cable. 2. Remove the air bag module. (Refer to page T-204.) 3. Check for continuity between the terminal of the horn switch connector and the steering shaft. I OFF I No I Horn switch ON 4. If correct, go to Step 5. 5. If not as specified, replace the horn switch and steering wheel as an assembly. Verify that the air bag system is operating normally by monitoring the air bag warning light. Continuity Yes Gartner Banana

HORN T Step 6 1. Ground the terminal B (GIO) of the horn relay connector. 2. Measure the voltage at the following terminal wires of the horn relay connector. Step 5 1. Remove the knee protector. 2. Disconnect the clock spring connector. 3. Check for continuity of the clock spring connector as shown in the figure. B+: Batterv ~ositive voltaae Continuity Yes No A (WIG) Actlon Repair wiring harness (Horn relay - Clock spring connector) Replace combination switch D (WIG) Voltage B+ Repair wiring harness Other I (STOP l5A fuse - Horn relay) Action Check D terminal Other B+ Repair wiring harness (STOP 15A fuse - Horn relay) Check C terminal REMOVAL I INSTALLATION Horn Remove and install as shown in the figure. Horn Switch 1. Disconnect the negative battery cable. u C (GIR) '+ Other Repair wiring harness (Horn relay - Horn) Replace horn relay Gartner Banana

T HORN TURN CLOCKWISE T RETURN 2.75 TURNS +I 2. Remove the air bag module and then remove the steer- ing wheel assembly. d 3. Before installation of the steering wheel reset the clock spring connector as follows: (1) Set the front wheels straight ahead. (2) Turn the clock spring connector clockwise until it stops. (3) Return 2.75 turns. (4) Align the marks (counterclockwise) on the clock spring connector and the outer housing. 4. Install the steering wheel and the air bag module. Verify that the air bag system is operating normally by monitor- ing the air bag warning light. Gartner Banana

SRS AIR BAG SYSTEM SYSTEM DIAGRAM PASSENGER-SIDE S-SENSOR AIR BAG MODULE I IG1 B+ HORN RELAY CLOCK SPRING BACK-UP BATTERY I AIR BAG SYSTEM WARNING LIGHT SENSOR -7 System Operation During collision When either of the D-sensors and the S-sensor are activated (closed) simultaneously by shock of a colli- sion, the circuit to the inflator is completed. The inflator creates nitrogen gas and the air bag is deployed. The air bag vents the nitrogen gas from the vent hole on the back side of the bag to reduce shock to the driver and to allow easier exit from the vehicle. During normal condition and malfunction The diagnostic module constantly monitors the components and wiring of the air bag system for malfunc- tion, open circuits, and short circuits. .J If a malfunction is detected, the diagnostic module illuminates or flashes the warning light. In the case of a short circuit in the sensors or sensor harnesses, the diagnostic module activates the warning light and shuts down the system to prevent accidental deployment of the air bag. Gartner Banana

T SRS AIR BAG SYSTEM GENERALPROCEDURES Before Servicing 1. Deactivate the audio antitheft system, if installed. (Refer to page T-120.) 2. Disconnect the negative battery cable. 3. Remove the lower panel. 4. Disconnect the orange and blue clock spring connec- tors. 5. Remove the glove compartment. 6. Disconnect the orange and blue passenger-side air bag module connectors. I , 46UOTXd21 TROUBLESHOOTING Troubleshootinn Procedure The air bag diagnostic module has a self-diagnosis function that flashes or illuminates the AIR BAG sys- tem warning light to indicate trouble in the air bag system. The trouble can be determined by the warning light illumination or flashing pattern. If the light does not illuminate but the system still has trouble, a warn- ing buzzer will sound 5 cycles of 5 times each. . . Flowchart I START Troubleshoot warning light circuit Does AIR BAG system warning light illuminate for 4-8 secs and I I Yes t Refer to service code table and troubleshoot system Press horn switch while turning steering wheel. Does horn sound? I I I Yes Reconnect connectors Are air bag module and horn switch connectors properly con- nected to clock spring connec- tor? Yes I I I I Troubleshooting horn circuit - Gartner Banana

SECTION NAME KEY SETS FRONT BUHPER REAR SUNPER WINDOW rlOULBIHG L COWL GRILLES HEAD LAMPS IIEAD LAHP RE 1 RACTORS FRONT COHBINATION LAWS REAR CUHBlNATIOH LAHPS L ICE HOE LAWS ORNhHENTS REAR F f Hf Ci+CR BONNET TRUNK 110 f RWT PANEL S FLHOEW & WHfkL APWOt4 P4NkL!$ LUSH & COWL PANELS SIDE PANELS FLOOR PANELS F LOOR ATTACHHENTS (HOLE COVERS ) HkTER HOOD SCf 600NC TCH CAB1.k RC 1 ER COMPONENTS SECTION nAnE ---------_L---_-----__________L_______I__________________L_______I__________________L_______I________-__________L_______I__________________L_______I__________________L_______I________ HEAI'ER Wit COMPONENTS HEATER CONTROLS COHPONENf S HEATER BLOWER COWPONENTS AIR CONBlTXOMR COHPRESSOR COHPONENTS (AIR CDh DITIONER) COOLING UNIT (AIR CO#DlTZONERI WINDOW GLASSES SUNRtOF SWiTCMES L RELAvC (ENGINE) DASMIOAWD SWITCHES CO~bfNAI~OH SWlfCiI RELAYS L UNIT i8OBV) DOOR SWITCH L HORNS AUTO CRUISE CONTROL C't SIGH AUDIO SYSTEHS (ANTENNA C WEAK ER MIWBSH2El.D YASHCK (U/U ANTI LUCI MAKC SYSICI) 7250 QUARTER WINCOW L TRIHS Gartner Banana