1986 TOYOTA SUPRA Service Repair Manual

179

180
CRUISE CONTROL

181
PPS (PROGRESSIVE POWER STEERING)

182
PPS (PROGRESSIVE POWER STEERING)
10A
GAUGE10A
ECU±IG
I141E 121E 17
A 9
B 11
II1 4 II114
IFIH SOL+ SOL± E
II1 8 II1 23 II1 2
1 3254
6 1
75Y
Y
P
Y
P LG±B
LG±R
W±B LG±B
LG±RBRR Y L±R
YY
B±R
1PPS ECU SPEEDOMETER
[COMB. METER] ODO AND TRIP
V10
VEHICLE SPEED SENSOR
(
SPEED SENSOR)
NO. 1
(
FOR COMBINATION METER) FROM POWER SOURCE SYSTEM(
SEE PAGE 56)
SPD B
P4 I14
I14
TE LL TA LE L I GHT RH T6
A 10 A 11
26 B C10 , C12A
L±R
Y
RL±RBR
L±R
PPS SOLENOID P1
I8
BR
BR12

183
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 " 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.
P 1 PPS SOLENOID
1±2 : APPROX. 7.7
(25°C, 77°F)
P 4 PPS ECU
4±GROUND : APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION
6±GROUND : ALWAYS CONTINUOUS
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C10A28P 127 (2JZ±GE)V1025 (2JZ±GTE)
C12B28P 429V1027 (2JZ±GE)
P 125 (2JZ±GTE)T 629
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1E20INSTRUMENT PANEL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
II138ENGINE WIRE AND INSTRUMENT PANEL WIRE (RIGHT KICK PANEL)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
IF36LEFT KICK PANEL
IH36RIGHT KICK PANEL
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
I 838INSTRUMENT PANEL WIREI 838INSTRUMENT PANEL WIRE
SYSTEM OUTLINE
SERVICE HINTS

184
SHIFT LOCK
1I 14 1I91I10
1 2SHIFT LOCK
CONTROL S W
SHIFT LOCK
SOLENOID
4 62 1 5
P1
P
P2
SLS±
SLS+
IE15A
CIG10A
ECU±IG15A
STOP
KEY INTERLOCK
SOLENOID ACC IG STP
KLS+EL±RL G±WG G±R
V
W±B W±B W±B
G±WB±RL±R
SHIFT LOCK ECU FROM POWER SOURCE SYSTEM(
SEE PAGE 56)
K3S7
1K 12
1J 1
W
1 2
STOP LIGHT
SW S11
W±B

185
WHEN THE IGNITION SW IS TURNED TO ACC POSITION THE CURRENT FROM THE CIG FUSE FLOWS TO TERMINAL 5 OF THE SHIFT
LOCK ECU, IN THE ON POSITION, THE CURRENT FROM THE ECU±IG FUSE FLOWS TO TERMINAL 1 OF THE ECU.
1. SHIFT LOCK MECHANISM
WITH THE IGNITION SW ON, WHEN A SIGNAL THAT THE BRAKE PEDAL IS DEPRESSED (STOP LIGHT SW ON) AND A SIGNAL THAT
THE SHIFT LEVER IS PUT IN ªPº POSITION (CONTINUITY BETWEEN P1 AND P OF THE SHIFT LOCK CONTROL SW) IS INPUT TO THE
ECU, THE ECU OPERATES AND CURRENT FLOWS FROM TERMINAL 1 OF THE ECU " TERMINAL 'SLS+' OF THE SHIFT LOCK
SOLENOID " SOLENOID " TERMINAL 'SLS±' " TERMINAL 4 OF THE ECU " GROUND. THIS CAUSES THE SHIFT LOCK SOLENOID
TO TURN ON (PLATE STOPPER DISENGAGES) AND THE SHIFT LEVER CAN SHIFT INTO POSITION OTHER THAN THE ªPº.
2. KEY INTERLOCK MECHANISM
WITH THE IGNITION SW ON OR ACC POSITION, WHEN THE SHIFT LEVER IS PUT IN ªPº POSITION (NO CONTINUITY BETWEEN P2
AND P OF SHIFT LOCK CONTROL SW), THE CURRENT FLOWING FROM TERMINAL 6 OF THE ECU " KEY INTERLOCK SOLENOID IS
CUT OFF. THIS CAUSES THE KEY INTERLOCK SOLENOID TO TURN OFF (LOCK LEVER DISENGAGES FROM LOCK POSITION) AND
THE IGNITION KEY CAN BE TURNED FROM ACC TO LOCK POSITION.
S 7 SHIFT LOCK ECU
5±GROUND : APPROX. 12 VOLTS WITH THE IGNITION SW AT ACC OR ON POSITION
1±GROUND : APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION
4±GROUND : ALWAYS CONTINUOUS
2±GROUND : APPROX. 12 VOLTS WITH THE BRAKE PEDAL DEPRESSED
S11 STOP LIGHT SW
2±1 : CLOSED WITH THE BRAKE PEDAL DEPRESSED
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
K 329S 729S1129
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1I
1J20COWL WIRE AND J/B NO.1 (LEFT KICK PANEL)
1K
20COWL WIRE AND J/B NO.1 (LEFT KICK PANEL)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
IE36LEFT KICK PANEL
1212
X4
5612 K3 S 7 S11BLUE
SYSTEM OUTLINE
SERVICE HINTS

186
CIGARETTE LIGHTER AND CLOCK
15A
CIG7. 5A
DOME10A
PANEL
1E 221I3
1E 111B 5
IF3 10 I15
A A521
2
4 3 12
AL±R
W±B
G±O
G±O G±OR L±R L±R W±BL±R
R
IH
W±B
CLOCK C8
CIGARETTE
LIGHTER C6
JUNCTION
CONNECTOR J1FROM POWER SOURCE SYSTEM(
SEE PAGE 56)