Toyota Supra 2015 Wiring Diagram Manual page 172

SYSTEM OUTLINE
THE 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.
(PPS OPERATION)
WHEN 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
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.
SERVICE HINTS
P1 PPS SOLENOID
1-2 : APPROX. 7.7
P4 PPS ECU
4-GROUND : APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION
6-GROUND : ALWAYS CONTINUITY
: PARTS LOCATION
CODE SEE PAGE
C10 A 28
C12 B 28
P1 25 (2JZ-GTE)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODE SEE PAGE
1E
20
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODE SEE PAGE
II1 38
: GROUND POINTS
CODE SEE PAGE
IF
36
IH
36
: SPLICE POINTS
CODE SEE PAGE
I8 38
TERMINAL 2
(25 C, 77 F)
CODE
P1
P4
T6
JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
INSTRUMENT PANEL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
ENGINE WIRE AND INSTRUMENT PANEL WIRE (RIGHT KICK PANEL)
GROUND POINTS LOCATION
LEFT KICK PANEL
RIGHT KICK PANEL
WIRE HARNESS WITH SPLICE POINTS
INSTRUMENT PANEL WIRE
TERMINAL 2 OF THE ECU
SEE PAGE
27 (2JZ-GE)
29
29
CODE SEE PAGE
I14 38
TERMINAL 6
CODE SEE PAGE
25 (2JZ-GTE)
V10 V10
27 (2JZ-GE)
WIRE HARNESS WITH SPLICE POINTS
INSTRUMENT PANEL WIRE
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