TSRM/MK4 Supra/Wiring Diagrams
Repair ManualWiring Diagrams
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SRS/SRS (Supplemental Restraint System)5 / 6
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SYSTEM OUTLINE — MK4 Supra SRS (Supplemental Restraint System) wiring diagram, page 5
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SYSTEM OUTLINE THE SRS (SUPPLEMENTAL RESTRAINT SYSTEM) IS A DRIVER AND FRONT PASSENGER PROTECTION DEVICE WHICH HAS A SUPPLEMENTAL ROLE TO THE SEAT BELTS. WHEN THE IGNITION SW IS TURNED TO ACC OR ON, CURRENT FROM THE CIG FUSE FLOWS TO TERMINAL 14 OF THE CENTER AIRBAG SENSOR ASSEMBLY ON Y WIRE.N THE IGNITION SW IS ON, THE CURRENT FLOWS FROM THE CIG FUSE TO TERMINAL 13. IF AN ACCIDENT OCCURS WHILE DRIVING, WHEN DECELERATION CAUSED BY A FRONTAL IMPACT IS DETECTED BY EACH SENSOR AND SWITCH, AND THE FRONTAL IMPACT EXCEEDS A SET LEVEL (WHEN THE SAFING SENSOR BUILT INTO THE CENTER AIRBAG SENSOR ASSEMBLY IS ON AND THE CENTER AIRBAG SENSOR IS ON, FRONT AIRBAG SENSORS ARE OFF), CURRENT FROM THE CIG OR IGN FUSE FLOWS TO TERMINALS 3, 2, OF THE CENTER AIRBAG SENSOR ASSEMBLY → TERMINAL 1 OF THE AIRBAG SQUIB → TERMINALS A, 1, OF THE CENTER AIRBAG SENSOR ASSEMBLY → TERMINAL 5, TERMINAL A OF BODY GROUND → GROUND. WHEN THE SAFING SENSOR BUILT INTO THE CENTER AIRBAG SENSOR ASSEMBLY IS ON AND THE FRONT AIRBAG SENSOR LH OR RH IS ON, CENTER AIRBAG SENSOR IS OFF AND CURRENT FROM THE CIG OR IGN FUSE FLOWS TO TERMINALS 3, 2, OF THE CENTER AIRBAG SENSOR ASSEMBLY → TERMINAL 1 OF THE AIRBAG SQUIB → TERMINALS 4, 1, OF THE CENTER AIRBAG SENSOR ASSEMBLY → TERMINAL B OR H → TERMINAL 1 OF THE FRONT AIRBAG SENSOR → TERMINAL 2 → TERMINAL 9 OR 10 OF THE CENTER AIRBAG SENSOR ASSEMBLY → TERMINAL 5, TERMINAL 6 OR BODY GROUND → GROUND. WHEN THE SAFING SENSOR BUILT INTO THE CENTER AIRBAG SENSOR ASSEMBLY IS ON, AND THE FRONT AIRBAG SENSOR LH OR RH IS ON AND CENTER AIRBAG SENSOR IS ON, ONE OF THE ABOVE–MENTIONED CIRCUITS IS ACTIVATED SO THAT CURRENT FLOWS TO THE AIRBAG SQUIBS AND CAUSES THEN TO OPERATE. THE AIRBAG STORED INSIDE THE STEERING WHEEL PAD IS INSTANTANEOUSLY EXPANDED TO SOFTEN THE SHOCK TO THE DRIVER. THE AIRBAG STORED INSIDE THE PASSENGER'S INSTRUMENT PANEL IS INSTANTANEOUSLY EXPANDED TO SOFTEN THE SHOCK TO THE PASSENGER. : PARTS LOCATION CODE SEE PAGE CODE SEE PAGE CODE SEE PAGE A27 28 D1 26 (2JZ–GE) F2 24 (2JZ–GTE) A28 28 D5 26 F 26 (2JZ–GE) C5 28 24 (2JZ–GTE) T6 29 D1 24 (2JZ–GTE) F1 26 (2JZ–GE) : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR CODE SEE PAGE JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION) 1E 20 INSTRUMENT PANEL WIRE AND J/B NO. 1 (LEFT KICK PANEL) 1G 20 1J 20 COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL) : CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS CODE SEE PAGE JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION) IF1 36 INSTRUMENT PANEL WIRE AND COWL WIRE (INSTRUMENT PANEL REINFORCEMENT LH) IH1 38 ENGINE WIRE AND INSTRUMENT PANEL WIRE (RIGHT KICK PANEL) : GROUND POINTS CODE SEE PAGE GROUND POINTS LOCATION IE 36 LEFT KICK PANEL : SPLICE POINTS CODE SEE PAGE WIRE HARNESS WITH SPLICE POINTS CODE SEE PAGE WIRE HARNESS WITH SPLICE POINTS I5 38 INSTRUMENT PANEL WIRE I14 38 INSTRUMENT PANEL WIRE