1997 TOYOTA SUPRA brake sensor

155
AND A/T INDICATOR (2JZ-GE)
THIS SYSTEM ELECTRICALLY CONTROLS THE LINE PRESSURE, THROTTLE PRESSURE, LOCK-UP PRESSURE AND
ACCUMULATOR PRESSURE ETC. THROUGH THE SOLENOID VALVE. THE ELECTRONICALLY CONTROLLED
TRANSMISSION IS A SYSTEM WHICH PRECISELY CONTROLS GEAR SHIFT TIMING AND LOCK-UP TIMING IN
RESPONSE TO THE VEHICLE'S DRIVING CONDITIONS AND THE ENGINE OPERATING CONDITIONS DETECTED BY
VARIOUS SENSORS, MAKING SMOOTH DRIVING POSSIBLE BY SHIFT SELECTION FOR EACH GEAR WHICH IS THE
MOST APPROPRIATE TO THE DRIVING CONDITIONS AT THAT TIME, AND CONTROLS THE ENGINE TORQUE DURING
SHIFTING TO ACHIEVE OPTIMUM SHIFT FEELING.
1. GEAR SHIFT OPERATION
WHEN DRIVING, THE ENGINE WARM UP CONDITION IS INPUT AS A SIGNAL TO TERMINAL (B) 44 OF THE ENGINE
CONTROL MODULE FROM THE ENGINE COOLANT TEMP. SENSOR AND THE VEHICLE SPEED SIGNAL FROM
VEHICLE SPEED SENSOR NO. 2 IS INPUT TERMINAL (B) 23 OF THE ENGINE CONTROL MODULE. AT THE SAME
TIME, THE THROTTLE VALVE OPENING SIGNAL FROM THE THROTTLE POSITION SENSOR IS INPUT TO TERMINAL
(B) 43 OF THE ENGINE CONTROL MODULE AS THROTTLE ANGLE SIGNAL.
BASED ON THESE SIGNALS, THE ENGINE CONTROL MODULE SELECTS THE BEST SHIFT POSITION FOR DRIVING
CONDITIONS AND SENDS CURRENT TO THE ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOIDS.
WHEN SHIFTING TO 1ST SPEED, THE CURRENT FLOWS FROM TERMINAL (B) 10 OF THE ENGINE CONTROL
MODULE  TERMINAL 1 OF THE ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID .  GROUND AND
CONTINUITY TO NO. 1 SOLENOID CAUSES THE SHIFT (NO. 2 SOLENOID DOES NOT HAVE CONTINUITY AT THIS
TIME.)
FOR 2ND SPEED, THE CURRENT FLOWS SIMULTANEOUSLY FROM TERMINAL (B) 9 OF THE ENGINE CONTROL
MODULE  TERMINAL 2 OF ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID  GROUND, AND
FROM TERMINAL (B) 10 OF THE ENGINE CONTROL MODULE  TERMINAL 1 OF THE ELECTRONICALLY
CONTROLLED TRANSMISSION SOLENOID  GROUND, AND CONTINUITY TO NO. 1 AND NO. 2 SOLENOIDS
CAUSES THE SHIFT.
FOR 3RD SPEED, THERE IS NO CONTINUITY TO NO. 1 SOLENOID, ONLY TO NO. 2 SOLENOID, CAUSING THE SHIFT.
SHIFTING INTO THE 4TH SPEED (OVERDRIVE) OCCURS WHEN NO CURRENT FLOWS TO NO. 1 AND NO. 2
SOLENOIDS.
2. LOCK-UP OPERATION
WHEN THE ENGINE CONTROL MODULE JUDGES FROM EACH SIGNAL THAT LOCK-UP OPERATION CONDITIONS
HAVE BEEN MET, THE CURRENT FLOWS FROM TERMINAL (B) 8 OF THE ENGINE CONTROL MODULE  TERMINAL
3 OF THE ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID GROUND, CAUSING CONTINUITY TO
THE LOCK-UP SOLENOID AND CAUSING LOCK-UP OPERATION.
3. STOP LIGHT SW CIRCUIT
IF THE BRAKE PEDAL IS DEPRESSED (STOP LIGHT SW ON) WHEN DRIVING IN LOCK-UP CONDITION, A SIGNAL IS
INPUT TO TERMINAL(A) 4 OF THE ENGINE CONTROL MODULE. THE ENGINE CONTROL MODULE OPERATES AND
CUTS THE CURRENT TO THE SOLENOID TO RELEASE LOCK-UP.
4. OVERDRIVE CIRCUIT
*O/D MAIN SW ON
WHEN THE O/D MAIN SW IS TURNED ON (SW POINT IS OPEN), A SIGNAL IS INPUT TO TERMINAL (A) 28 OF THE
ENGINE CONTROL MODULE AND THE ELECTRONICALLY CONTROLLED TRANSMISSION CAUSES SHIFT TO
OVERRIDE WHEN THE CONDITIONS FOR OVERDRIVE ARE MET.
*O/D MAIN SW OFF
WHEN THE O/D MAIN SW IS TURNED OFF (SW POINT IS CLOSED). THE CURRENT FLOWING THROUGHTHE O/D
OFF INDICATOR LIGHT FLOWS TO GROUND BY WAY OF THE O/D MAIN SW AND CAUSES THE O/D OFF INDICATOR
LIGHT TO LIGHT UP. AT THE SAME TIME, A SIGNAL IS INPUT TO TERMINAL (A) 28 OF THE ENGINE CONTROL
MODULE AND THE ELECTRONICALLY CONTROLLED TRANSMISSION PREVENTS SHIFT INTO OVERDRIVE.
5. ELECTRONICALLY CONTROLLED TRANSMISSION PATTERN SELECT SW CIRCUIT
WHEN THE ELECTRONICALLY CONTROLLED TRANSMISSION PATTERN SELECT SW IS SWITCHED FROM NORMAL
TO MANUAL, A SIGNAL IS INPUT TO TERMINAL (A) 18 OF THE ENGINE CONTROL MODULE. INPUT OF THIS SIGNAL
CAUSES CURRENT TO FLOW FROM THE GAUGE FUSE TO TERMINAL (A) 1 OF THE COMBINATION METER 
TERMINAL (A) 12 TERMINAL (A) 25 OF THE ENGINE CONTROL MODULE  GROUND, LIGHTING UP THE
INDICATOR LIGHT. IF THE A/T SHIFT LEVER IS THEN SHIFTED TO 2º POSITION, THE ENGINE CONTROL MODULE
ENABLES THE VEHICLE TO START OFF WITH THE TRANSMISSION IN 2ND GEAR, THUS PERMITTING EASING
STARTING OFF AND DRIVING ON SLIPPERY ROADS.
6. CRUISE CONTROL
WHEN CRUISE CONTROL OPERATION IS SELECTED A SIGNAL IS INPUT TO TERMINAL (A) 12 OF THE ENGINE
CONTROL MODULE FROM CRUISE CONTROL ECU. AS A RESULT, THE ENGINE CONTROL MODULE OPERATES AND
CONTROLS OVERDRIVE, LOCK-UP AND SO ON FOR SMOOTH DRIVING.
SYSTEM OUTLINE

162
ABS (W/O TRACTION CONTROL)
THIS SYSTEM CONTROLS THE RESPECTIVE BRAKE FLUID PRESSURES ACTING ON THE DISC BRAKE CYLINDERS
OF THE RIGHT FRONT WHEEL, LEFT FRONT WHEEL AND REAR WHEELS WHEN THE BRAKES ARE APPLIED IN A
PANIC STOP SO THAT THE WHEELS DO NOT LOCK. THIS RESULTS IN IMPROVED DIRECTIONAL STABILITY AND
STEERABILITY DURING PANIC BRAKING.
1. INPUT SIGNALS
(1) SPEED SENSOR SIGNAL
THE SPEED OF THE WHEELS IS DETECTED AND INPUT TO TERMINALS FL+, FR+, RL+ AND RR+ OF THE ABS
ECU.
(2) STOP LIGHT SW SIGNAL
A SIGNAL IS INPUT TO TERMINAL STP OF THE ABS ECU WHEN THE BRAKE PEDAL IS DEPRESSED.
2. SYSTEM OPERATION
DURING SUDDEN BRAKING, THE ABS ECU WHICH HAS SIGNALS INPUT FROM EACH SENSOR CONTROLS THE
CURRENT FLOWING TO THE SOLENOID INSIDE THE ACTUATOR AND LETS THE HYDRAULIC PRESSURE ACTING ON
EACH WHEEL CYLINDER ESCAPE TO THE RESERVOIR. THE PUMP INSIDE THE ACTUATOR IS ALSO OPERATING AT
THIS TIME AND IT RETURNS THE BRAKE FLUID FROM THE RESERVOIR TO THE MASTER CYLINDER, THUS
PREVENTING LOCKING OF THE VEHICLE WHEELS.
IF THE ECU JUDGES THAT THE HYDRAULIC PRESSURE ACTING ON THE WHEEL CYLINDER IS INSUFFICIENT, THE
CURRENT ACTING ON SOLENOID IS CONTROLLED AND THE HYDRAULIC PRESSURE IS INCREASED.
HOLDING OF THE HYDRAULIC PRESSURE IS ALSO CONTROLLED BY THE ECU, BY THE SAME METHOD AS ABOVE,
BY REPEATED PRESSURE REDUCTION, HOLDING AND INCREASE ARE REPEATED TO MAINTAIN VEHICLE
STABILITY AND TO IMPROVE STEERABILITY DURING SUDDEN BRAKING.
A 6 (A), A 7 (B) ABS ACTUATOR
(A) 1-GROUND : ALWAYS CONTINUITY
(B) 5-(A) 4:33

(B) 1,(B) 2,(B) 4,(A) 4:APPROX. 8.8

(B) 5,(B) 6,(B) 8,(A) 4:APPROX. 4.3

A10, A11 ABS SPEED SENSOR FRONT LH, RH
1-2:1.4-1.8 K
(20
C, 68
F)
A31, A32 ABS SPEED SENSOR REAR LH, RH
1-2:0.9-1.3 K
(20
C, 68
F)
A18, (B), A19(A) ABS ECU
(B) 2-GROUND :10-14 VOLTS WITH THE IGNITION SW ON
(B)12-GROUND :10-14 VOLTS WITH THE STOP LIGHT SW ON (BRAKE PEDAL DEPRESSED)
(A) 2, (A) 13-GROUND :ALWAYS CONTINUITY
(A) 1, (A) 4, (A) 10, (A) 11, (A) 21, (A) 22-GROUND:10-14 VOLTS WITH THE IGNITION SW ON
S11 STOP LIGHT SW
1-2:CLOSED WITH THE BRAKE PEDAL DEPRESSED
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
A 6A26(2JZ-GE)A1126(2JZ-GE)D 126(2JZ-GE)
A 7B26(2JZ-GE)A18B28D 528
A 8A26A19A28S1129
A 9B26A3130T 529
A1026(2JZ-GE)A3230
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
222R/B NO. 2 (ENGINE COMPARTMENT LEFT)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
1E20INSTRUMENT PANEL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1I20COWL WIRE AND J/B NO 1 (LEFT KICK PANEL)1K20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
SYSTEM OUTLINE
SERVICE HINTS

166
ABS (W/ TRACTION CONTROL)
THIS SYSTEM CONTROLS THE RESPECTIVE BRAKE FLUID PRESSURES ACTING ON THE DISC BRAKE CYLINDERS
OF THE RIGHT FRONT WHEEL, LEFT FRONT WHEEL, RIGHT REAR WHEEL AND LEFT REAR WHEEL WHEN THE
BRAKES ARE APPLIED IN A PANIC STOP SO THAT THE WHEELS DO NOT LOCK.
THIS RESULTS IN IMPROVED DIRECTIONALLY STABILITY AND STEERABILITY DURING PANIC BRAKING.
1. INPUT SIGNALS
(3) SPEED SENSOR SIGNAL
THE SPEED OF THE WHEELS IS DETECTED AND INPUT TO TERMINALS FL+, FR+, RL+ AND RR+ OF THE ABS
ECU.
(4) STOP LIGHT SW SIGNAL
A SIGNAL IS INPUT TO TERMINAL STP OF THE ABS ECU WHEN THE BRAKE PEDAL IS DEPRESSED.
(5) DECELERATION SENSOR SIGNAL
LONGITUDINAL AND LATERAL ACCELERATION IS DETECTED AND INPUT TO THE ABS ECU.
2. SYSTEM OPERATION
DURING SUDDEN BRAKING, THE ABS ECU WHICH HAS SIGNALS INPUT FROM EACH SENSOR CONTROLS THE
CURRENT FLOWING TO THE SOLENOID INSIDE THE ACTUATOR AND LETS THE HYDRAULIC PRESSURE ACTING ON
EACH WHEEL CYLINDER ESCAPE TO THE RESERVOIR. THE PUMP INSIDE THE ACTUATOR IS ALSO OPERATING AT
THIS TIME AND IT RETURNS THE BRAKE FLUID FROM THE RESERVOIR TO THE MASTER CYLINDER, THUS
PREVENTING LOCKING OF THE VEHICLE WHEELS.
IF THE ECU JUDGES THAT THE HYDRAULIC PRESSURE ACTING ON THE WHEEL CYLINDER IS INSUFFICIENT, THE
CURRENT ACTING ON SOLENOID IS CONTROLLED AND THE HYDRAULIC PRESSURE IS INCREASED.
HOLDING OF THE HYDRAULIC PRESSURE IS ALSO CONTROLLED BY THE ECU, BY THE SAME METHOD AS ABOVE,
BY REPEATED PRESSURE REDUCTION, HOLDING AND INCREASE ARE REPEATED TO MAINTAIN VEHICLE
STABILITY AND TO IMPROVE STEERABILITY DURING SUDDEN BRAKING.
A20 (A), A21 (B) ABS ECU
(A) 13-GROUND::10-14 VOLTS WITH THE IGNITION SW AT ON POSITION
(A) 5-GROUND:10-14 VOLTS WITH THE STOP LIGHT SW ON
(A) 12,(A) 25-GROUND:ALWAYS CONTINUITY
A 6 (A), A 7 (B) ABS ACTUATOR
(A) 1-GROUND:ALWAYS CONTINUITY
(A) 5-(A) 4.33 W
(B) 1, (B) 2, (B) 3, (B) 4- (A) 4,:APPROX. 8 8 W
(B) 5, (B) 6, (B) 7, (B) 8- (A) 4,:APPROX. 4.3 W
S11 STOP LIGHT SW
2-1:CLOSED WITH THE BRAKE PEDAL DEPRESSED
A10, A11 ABS SPEED SENSOR FRONT LH, RH
1-2:0.4-1.8 K W (20
C, 68
F)
A31, A32 ABS SPEED SENSOR REAR LH, RH
1-2:0.9-1.3 K W (20
C, 68
F)
SYSTEM OUTLINE
SERVICE HINTS

176
CRUISE CONTROL
CURRENT IS APPLIED AT ALL TIMES THROUGH STOP FUSE TO TERMINAL 1 OF THE CRUISE CONTROL ECU,
TERMINAL 2 OF THE STOP LIGHT SW, AND ALSO THROUGH THE ECU-B FUSE TO TERMINAL 15 OF THE CRUISE
CONTROL ECU.
WITH THE IGNITION SW TURNED TO ON, THE CURRENT FLOWS THROUGH GAUGE FUSE TO TERMINAL (A) 9 OF
THE COMBINATION METER AND THE CURRENT THROUGH ECU-IG FUSE FLOWS TO TERMINAL 14 OF THE CRUISE
CONTROL ECU.
WHEN THE IGNITION SW IS ON AND THE CRUISE CONTROL MAIN SWITCH IS TURNED ON, A SIGNAL IS INPUT FROM
TERMINAL 15 OF CRUISE CONTROL MAIN SW TO TERMINAL 19 OF THE CRUISE CONTROL ECU. AS A RESULT, THE
CRUISE CONTROL ECU FUNCTIONS AND THE CURRENT FLOWS THROUGH TERMINAL 14 OF THE CRUISE
CONTROL ECU TO TERMINAL 13 OF THE CRUISE CONTROL ECU " GROUND, AND THE CRUISE CONTROL SYSTEM
IS IN A CONDITION READY FOR OPERATION.
AT THE SAME TIME, THE CURRENT THROUGH THE GAUGE FUSE FLOWS TO TERMINAL (A) 9 OF THE CRUISE
CONTROL INDICATOR LIGHT " TERMINAL (B) 6 " TERMINAL 7 OF THE CRUISE CONTROL ECU " TERMINAL 13 "
GROUND, CAUSING THE CRUISE CONTROL INDICATOR LIGHT TO LIGHT UP, INDICATING THAT THE CRUISE
CONTROL IS READY FOR OPERATION.
1. SET OPERATION
WHEN THE CRUISE CONTROL MAIN SW IS TURNED ON AND THE SET SW IS PUSHED WITH THE VEHICLE
SPEED WITHIN THE SET LIMIT (APPROX. 40 KM/H, 25 MPH TO 200 KM/H, 124 MPH), A SIGNAL IS INPUT TO
TERMINAL 18 OF THE CRUISE CONTROL ECU AND THE VEHICLE SPEED AT THE TIME THE SET SW IS
RELEASED, WHICH I MEMORIZED IN THE ECU AS THE SET SPEED.
2. SET SPEED CONTROL
DURING CRUISE CONTROL DRIVING, THE ECU COMPARES THE SET SPEED MEMORIZED IN THE ECU WITH THE
ACTUAL VEHICLE SPEED INPUTS INTO TERMINAL 20 OF THE CRUISE CONTROL ECU FROM THE SPEED
SENSOR, AND CONTROLS THE CRUISE CONTROL ACTUATOR TO MAINTAIN THE SET SPEED.
WHEN THE ACTUAL SPEED IS LOWER THAN THE SET SPEED, THE ECU CAUSES THE CURRENT TO THE
CRUISE CONTROL ACTUATOR TO FLOW FROM TERMINAL 12 " TERMINAL 1 OF THE CRUISE CONTROL
ACTUATOR " TERMINAL 2 " TERMINAL 11 OF THE CRUISE CONTROL ECU. AS A RESULT, THE MOTOR IN THE
CRUISE CONTROL ACTUATOR IS ROTATED TO OPEN THE THROTTLE VALVE AND THE THROTTLE CABLE IS
PULLED TO INCREASE THE VEHICLE SPEED. WHEN THE ACTUAL DRIVING SPEED IS HIGHER THAN THE SET
SPEED, THE CURRENT TO CRUISE CONTROL ACTUATOR FLOWS FROM TERMINAL 11 OF THE ECU "
TERMINAL 2 OF THE CRUISE CONTROL ACTUATOR " TERMINAL 1 " TERMINAL 12 OF THE CRUISE CONTROL
ECU.
THIS CAUSES THE MOTOR IN THE CRUISE CONTROL ACTUATOR TO ROTATE TO CLOSE THE THROTTLE VALVE
AND RETURN THE THROTTLE CABLE TO DECREASE THE VEHICLE SPEED.
3. COAST CONTROL
DURING THE CRUISE CONTROL DRIVING, WHILE THE COAST SW IS ON, THE CRUISE CONTROL ACTUATOR
RETURNS THE THROTTLE CABLE TO CLOSE THE THROTTLE VALVE AND DECREASE THE DRIVING SPEED. THE
VEHICLE SPEED WHEN THE COAST SWITCH IS TURNED OFF IS MEMORIZED AND THE VEHICLE CONTINUES AT
THE NEW SET SPEED.
4. ACCEL CONTROL
DURING CRUISE CONTROL DRIVING, WHILE THE ACCEL SW IS TURNED ON, THE CRUISE CONTROL ACTUATOR
PULLS THE THROTTLE CABLE TO OPEN THE THROTTLE VALVE AND INCREASE THE DRIVING SPEED.
THE VEHICLE SPEED WHEN THE ACCEL SW IS TURNED OFF IS MEMORIZED AND THE VEHICLE CONTINUES AT
THE NEW SET SPEED.
5. RESUME CONTROL
UNLESS THE VEHICLE SPEED FALLS BELOW THE MINIMUM SPEED LIMIT (APPROX. 40 KM/H, 25 MPH) AFTER
CANCELING THE SET SPEED BY THE CANCEL SW, PUSHING THE RESUME SW WILL CAUSE THE VEHICLE TO
RESUME THE SPEED SET BEFORE THE CANCELLATION.
6. MANUAL CANCEL MECHANISM
IF ANY OF THE FOLLOWING OPERATIONS OCCUR DURING CRUISE CONTROL OPERATION, THE MAGNETIC
CLUTCH OF THE ACTUATOR TURNS OFF AND THE MOTOR ROTATES TO CLOSE THE THROTTLE VALVE AND
THE CRUISE CONTROL IS RELEASED.
*PLACING THE SHIFT LEVER IN EXCEPT Dº POSITION (PARK/NEUTRAL POSITION SW EXCEPT Dº POSITION).
SIGNAL IS NOT INPUT TO TERMINAL 2 OF THE ECUº (A/T)
*DEPRESSING THE BRAKE PEDAL (STOP LIGHT SW ON). SIGNAL IS INPUT TO TERMINAL 16 OF THE ECUº
*PUSHING THE CANCEL SWITCH (CANCEL SW ON). SIGNAL IS INPUT TO TERMINAL 18 OF THE ECUº
*DEPRESSING THE CLUTCH PEDAL (CRUISE CONTROL CLUTCH SW OFF). SIGNAL IS NOT INPUT TO TERMINAL
2 OF THE ECUº
SYSTEM OUTLINE

C 4C10 C6C7C8C11
A 1C13 B7B5B4A14 B2B1
I 2 I 2I14
A A
EB I H E C 2 1 1II1 33
II1 34
2 1
IB2 14 IF1 15
D 6
P 5J 1
E 7
BRAKE FLUID LEVEL
WARNI NG SW
DIODE
ENGI NE OIL
LEVEL SENSOR
JUNCTION
CONNECTORPARKING BRAKE
SW
DAYTIME RUNNING
LI GHT RELAY
(
MAIN)
BRK
PKBDELAYCOMBINATION METER FROM POWER SOURCE SYSTEM (
SEE PAGE 56)
G- W
R- B
L
G- R
L- Y
G- B BR- W
W- B
W- B
G
L- W
Y- G
R- Y
R- G Y- GG BR W- B W- BBR- W BR- W B- W
BR- W
BR- W R- W W- B
Y- G (
*3)
L- WR- Y Y- G R- G
BR- W BR- W B- W B- WG- OG- O
BRAKE
P
R
N
D
2
L
MASTER (
*1) (
*2)
(
*1)
(
*4)
(
*1 *4) (
*1 *3)
(
*2)
FROM A/ T INDI CATOR LIGHT SW
[P ARK/NEUTRAL POSITION SW]
12
18
8
B 2
C C10 , C11 , C12BA
44
R- W
(
*3)
W- B
A
SNOW
A 5IF1 9
P- G P- G
(
*3) (
*3)TO THROTTLE ECU
(
*2)
(
*2)
1
GENERATOR G 2
L
10A
PANEL
1I 8
221
*1 : USA
* 2 : CANADA* 3 : 2JZ- GTE
* 4 : 2JZ- GE

224
COMBINATION METER
B2 BRAKE FLUID LEVEL WARNING SW
1-2 : CLOSED WITH THE FLOAT DOWN
P5 PARKING BRAKE SW
1-GROUND : CLOSED WITH THE PARKING BRAKE LEVER PULLED UP
O2 OIL PRESSURE SW
1-GROUND : CLOSED WITH THE OIL PRESSURE ABOVE APPROX. 20 KPA (2.8 PSI, 0.2 KG/CM
2)
E4 ENGINE COOLANT TEMP. SENDER
1-GROUND : APPROX. 160-240 W (50
C, 122
F)
APPROX. 17.1-20.4 W (120
C, 288
F)
E7 ENGINE OIL LEVEL SENSOR
1-2 : CLOSED WITH THE FLOAT UP AND THE ENGINE OIL TEMP. AT BELOW APPROX. 55
C (131
F)
OPEN WITH THE FLOAT DOWN AND THE ENGINE OIL TEMP. AT BELOW APPOX. 60
C (140
F)
F14 FUEL SENDER
1-2 : APPROX. 3 W AT FUEL FULL
APPROX. 110 W AT FUEL EMPTY
C10 (B), C12 (A) COMBINATION METER
(B) 9-GROUND : APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION
(A) 16-GROUND : APPROX. 12 VOLTS WITH THE IGNITION SW AT ST POSITION AND THE SHIFT LEVER AT P OR N
POSITION (A/T)
12 VOLTS WITH THE IGNITION SW AT ST POSITION AND THE CLUTCH PEDAL DEPRESSED
(M/T)
(A) 8-GROUND : ALWAYS CONTINUITY
(A) 11-GROUND : ALWAYS CONTINUITY
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
A1328E724 (2JZ-GTE)O227 (2JZ-GE)
B224 (2JZ-GTE)E726 (2JZ-GE)P225 (2JZ-GTE)B226 (2JZ-GE)E1029P227 (2JZ-GE)
C928F1430P429
C10B28G224 (2JZ-GTE)P529
C11C28G226 (2JZ-GE)T529
C12A28I427T629
D628J129T1329
E424 (2JZ-GTE)L230V1025 (2JZ-GTE)E426 (2JZ-GE)O225 (2JZ-GTE)V1027 (2JZ-GE)
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
222R/B NO. 2 (ENGINE COMPARTMENT LEFT)
423R/B NO. 4 (LEFT KICK PANEL)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1B20ENGINE ROOM MAIN WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1E20INSTRUMENT PANEL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1G
1H
1I20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1J
()
1K
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IB136ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)IB236ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)
IE136INSTRUMENT PANEL WIRE AND FLOOR NO. 2 WIRE (LEFT KICK PANEL)
IF136INSTRUMENT PANEL WIRE AND COWL WIRE (INSTRUMENT PANEL REINFORCEMENT LH)IF236INSTRUMENT PANEL WIRE AND COWL WIRE (INSTRUMENT PANEL REINFORCEMENT LH)
IF336INSTRUMENT PANEL WIRE AND COWL WIRE (RIGHT KICK PANEL)
II138ENGINE WIRE AND INSTRUMENT PANEL WIRE (RIGHT KICK PANEL)
IJ238ENGINE WIRE COWL WIRE (RIGHT KICK PANEL)
BP140FUEL GAUGE WIRE AND FLOOR NO. 2 WIRE (LUGGAGE ROOM FRONT LH)
SERVICE HINTS

S05506
Sub-Throttle Position
Sensor Connector
Water Bypass Hose
PS Air Hose

Gasket
Throttle Body
Throttle Position Sensor Connector
Sub-Throttle Actuator Connector
Control Cable
Bracket and Cable
Vacuum
Hose
Air
Hose
IAC Valve Pipe
Air Hose
Air Intake
Chamber Stay
IAC Valve
Connector Engine Wire Protector
VSV Connector for EGR
MAP Sensor Connector
VSV Connector for Fuel Pressure Control
Filler Cap
x 10 No.3 Timing Belt Cover
Ignition Coils AssemblyEVAP Hose
EGR Pipe
Engine Wire
Protector
Ground Cable
Brake Booster
Vacuum Hose
EGR Gas
Temperature
Sensor Connector
Vacuum Hose
Pressure Tank
and VSV Assembly
Engine Wire Bracket
Engine Wire Clamp
Manifold Stay
Gasket
x 5
No.4 Water Bypass Pipe PS Air Hose
No.4 Water
Bypass Hose
Water Bypass hose
Air Intake Chamber
Engine Wire Protector

Gasket
Fuel Inlet Pipe
Fuel Pressure
Pulsation DamperVacuum Sensing Hose
Intake Manifold and
Delivery Pipe Assembly
Fuel Return Hose

Gasket
x 6

Gasket
Gasket
Engine Wire Bracket
PS Vane Pump
Oil Dipstick and
Guide for Transmission Oil Dipstick and
Guide for Engine

O-Ring

O-Ring
Timing Belt
Gasket
No.2 Timing
Belt Cover
Drive Belt Tensioner
Dust Cover
Timing Belt Tensioner
Drive Belt Tensioner Damper

Non-reusable part
Drive Belt TensionerM/T
- ENGINE MECHANICAL (2JZ-GTE)CYLINDER HEAD
EM-27
1132 Author
: Date
:
1997 SUPRA (RM502U)

EM-2
- ENGINE MECHANICAL (2JZ-GTE)CO/HC
1107 Author
: Date
:
1997 SUPRA (RM502U)
If the CO/HC concentration does not comply with regulations,
troubleshoot in the order given below.
(1) Check heated oxygen sensors operation.
(See page SF-82)
(2) See the table below for possible causes, and then
inspect and correct the applicable causes if neces-
sary.
COHCPhenomenonCauses
NormalHighRough idle1. Faulty ignitions:

Incorrect timing

Fouled, shorted or improperly gapped plugs
2. Incorrect valve clearance
3. Leaky EGR valve
4.Leaky intake and exhaust valves
5.Leaky cylinder
LowHighRough idle
(Fluctuating HC reading)1. Vacuum leaks:

PCV hose

EGR valve

Intake manifold

Air intake chamber

Throttle body

IAC valve

Brake booster line
2. Lean mixture causing misfire
HighHighRough idle
(Black smoke from exhaust)1. Restricted air filter:
2. Faulty SFI system:

Faulty fuel pressure regulator

Clogged fuel return line

Defective ECT sensor

Defective turbo pressure sensor

Faulty ECM

Faulty injector

Faulty throttle position sensor

Faulty MAF meter