{"model":"mk4","model_name":"MK4 Supra","vehicle":"Toyota Supra A80 (1993–2002, 2JZ-GE / 2JZ-GTE)","document":"Electrical Wiring Diagram","section":"PPS","section_name":"PPS (Progressive Power Steering)","page":2,"pages_in_section":2,"title":"System Outline","section_header":"Power Steering System","ocr_text":"SYSTEM OUTLINE\n\nTHE PPS (HYDRAULIC REACTION TYPE) CONTROLS THE HYDRAULIC PRESSURE APPLIED TO THE HYDRAULIC REACTION CHAMBER IN THE GEAR BOX CONTROL UNIT USING THE PPS ECU, TO CHANGE THE STEERING FORCE AND PROVIDE OPTIMUM STEERING FEELING AT ANY VEHICLE SPEEDS AND UNDER ANY STEERING CONDITIONS.\n(PPS OPERATION)\nWHEN THE IGNITION SW IS TURNED ON THE STARTING CURRENT FLOWS FROM THE ECU–IG FUSE TO TERMINAL 4 OF THE PPS ECU. THE PPS ECU MONITORS VEHICLE SPEED, INPUT SIGNAL TO TERMINAL 5 OF THE ECU. WHEN THE VEHICLE SPEED IS LOW, THE PPS ECU SENDS A HIGHER–CURRENT FROM TERMINAL 1 OF THE ECU → TERMINAL 1 OF THE SOLENOID VALVE → TERMINAL 2 → TERMINAL 2 OF THE ECU → TERMINAL 6 → GROUND, INCREASING THE SOLENOID VALVE OPENING ANGLE TO PROVIDE COMFORTABLE STEERING OPERATION. WHEN THE VEHICLE SPEED IS HIGH, THE PPS ECU DECREASES THE SOLENOID VALVE OPENING ANGLE BY REDUCING THE CURRENT TO THE VALVE TO PROVIDE RESPONSIVE STEERING FEELING.\n\nSERVICE HINTS\n\nP 1 PPS SOLENOID\n1–2 : APPROX. 7.7Ω (25˚C, 77˚F)\nP 4 PPS ECU\n4–GROUND : APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION\n6–GROUND : ALWAYS CONTINUOUS\n\n: PARTS LOCATION\n\nCODE SEE PAGE CODE SEE PAGE CODE SEE PAGE\nC10 A 28 P 1 27 (2JZ–GE) V10 25 (2JZ–GTE)\nC12 B 28 P 4 29 27 (2JZ–GE)\nP 1 25 (2JZ–GTE) T 6 29\n\n: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR\n\nCODE SEE PAGE JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)\n1E 20 INSTRUMENT PANEL WIRE AND J/B NO. 1 (LEFT KICK PANEL)\n\n: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS\n\nCODE SEE PAGE JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)\nIi1 38 ENGINE WIRE AND INSTRUMENT PANEL WIRE (RIGHT KICK PANEL)\n\n: GROUND POINTS\n\nCODE SEE PAGE GROUND POINTS LOCATION\nIF 36 LEFT KICK PANEL\nIH 36 RIGHT KICK PANEL\n\n: SPLICE POINTS\n\nCODE SEE PAGE WIRE HARNESS WITH SPLICE POINTS CODE SEE PAGE WIRE HARNESS WITH SPLICE POINTS\nI 8 38 INSTRUMENT PANEL WIRE I 8 38 INSTRUMENT PANEL WIRE\n\n183","image":"https://tsrm.sasquatchvc.com/images/mk4-ewd/PPS/PPS_002.png","url":"https://tsrm.sasquatchvc.com/mk4/ewd/PPS/2","prev":{"page":1,"url":"https://tsrm.sasquatchvc.com/mk4/ewd/PPS/1","api":"https://tsrm.sasquatchvc.com/api/pages/mk4/ewd/PPS/1"},"next":null,"section_url":"https://tsrm.sasquatchvc.com/mk4/ewd/PPS","section_api_pages":["https://tsrm.sasquatchvc.com/api/pages/mk4/ewd/PPS/1","https://tsrm.sasquatchvc.com/api/pages/mk4/ewd/PPS/2"],"note":"OCR transcript of a scanned Toyota factory manual page; verify critical values (torque specs, part numbers) against the image."}