Page 1065 of 1807
6
30A
AM2 22
222 1
MB 1
A152 31
IB2 12 EA1 3IJ213
I 4E16 E16
IF2 13
IF2 10 EA2 1IJ11
IGNITION SW
50A
MAIN
BATTERY
STARTERTHEFT DETERRENT
AND DOOR LOCK
CONTROL ECU STARTER
RELAY
TO BULB CHECK RELAY
[COMB. METER]PARK /NEUTRA
POSITION SW
(
A/T) CLUTCH
START SW
(
M/T)
B S 2 , S 3A I19
T13 C 9P 2 B- R B- W
B- O
B- W
B B- W
B
B
L- OIJ1 2B
(
A/ T)
B
(
M/T)
B- WB
(
A/T) B- W
(
A/ T)
B
(
M/T)B- W B- W
BB- W L- OB B
L- OB
B
B
(
A/T)
255
W- R W- R
IB1 4
22
B
(
A/T)
B
E17 : A/T
E16 : M/T I 4
B
B
(
A/T)
(
M/ T)(
M/ T)
(
A/ T)
(
A/T)
(
A/ T)
I20 IJ29
B- W
81J 6
1K 47. 5A
ST
11
2A 1
SRLY
7AM2 IG2
ST2
LP
N6
60
STARTING AND IGNITION (2JZ-GTE)
Page 1066 of 1807
A 2B5B4B10 B11 B12 B6
B 77 B76 B57 B56 B55 B54 B53 B52 B58
B 26 B6B25 B27 B7A16A 4 A 3 B 7 B 8 B 9 B 3 B 2 B 1
G1
G- G2 NE NE-TACOGND IGF IGT6 IGT5 IGT4 IGT3 IGT2 IGT1+B IGC2 IGC3 IGC4 IGC5 IGC6 IGC1
STA NSW IGT1 IGT2 IGT3 IGT4 IGT5 IGT6 IGFE16 E11 E11 E11 E11 E11 E16
2 1
2 1
2 1
2 1
2 1
2 1
2 12121
EC 2 1
EDII1 29 B- O
B- W
BB-O B-O B-O B-O B-O B-O B-O
B- O
B- O
B- O
B- O
B- O
B- O
B- O G Y- R Y- GY- BY L- Y B- W
R- W
W- R
LG
B- R
L
R
R- Y
BR
B- O BR B- W B- W
BR BR
A A A
(
SHIELDED)
(
SHIELDED)IGNITION COIL
NO. 2
NOISE FILTER
IGNITER
ENGINE CONTROL MODULE
CAMSHAFT POSITION
SENSOR NO. 1CAMSHAFT POSI TION
SENSOR NO. 2CRANKSHAFT POSITION
SENSORTO TACHOMETER
[COMB. METER]
BR
A E 9 , E10BB I 2 , I 3A
I 7
N 1
C 3
C 2 C 1
IGNITION COIL
NO. 3 I 8
IGNITION COIL
NO. 4 I 9
IGNITION COIL
NO. 5 I10
IGNITION COIL
NO. 6 I11
IGNITION COIL
NO. 1 I 6
(
A/T)
(
A/ T)
JUNCTION
CONNECTOR J 2
B- R B- WW
(
SHIELDED)L
BR O
I17
BR
A
61
Page 1067 of 1807

62
STARTING AND IGNITION (2JZ-GTE)
I19 IGNITION SW
7-8 : CLOSED WITH THE IGNITION SW AT ST POSITION
7-6 : CLOSED WITH THE IGNITION SW AT ON OR ST POSITION
P2 PARK/NEUTRAL POSITION SW (A/T)
6-5 : CLOSED WITH THE A/T SHIFT LEVER IN P OR N POSITION
C9 CLUTCH START SW (M/T)
1-2 : CLOSED WITH THE CLUTCH PEDAL FULLY DEPRESSED
S2 (A), S3 (B) STARTER
POINTS CLOSED WITH THE PARK/NEUTRAL POSITION SW ON AND THE IGNITION SW AT ST POSITION (A/T)
POINTS CLOSED WITH THE CLUTCH START SW ON AND THE IGNITION SW AT ST POSITION (M/T)
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C124I3B25J229
C224I625N125 (2JZ-GTE)
C324 (2JZ-GTE)I725P225 (2JZ-GTE)
C928I825S2A25 (2JZ-GTE)
D124 (2JZ-GTE)I925S3B25 (2JZ-GTE)
E9B29I1025T1329
E10A29I1125
I2A25I1929
: 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 WIRE HARNESS (CONNECTOR LOCATION)
1J20COWL WIRE AND J/B NO 1 (LEFT KICK PANEL)IK20COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
2A22BATTERY AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
EA132(2JZ-GTE)ENGINE WIRE AND ENGINE ROOM MAIN WIRE (NEAR THE R/B NO 2)EA232ENGINE WIRE AND ENGINE ROOM MAIN WIRE (NEAR THE R/B NO. 2)
IB136ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)IB236ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)
IF236INSTRUMENT PANEL WIRE AND COWL WIRE (INSTRUMENT PANEL REINFORCEMENT LH)
II138ENGINE WIRE AND INSTRUMENT PANEL WIRE (RIGHT KICK PANEL)
IJ138ENGINE WIRE AND COWL WIRE (RIGHT KICK PANEL)IJ238ENGINE WIRE AND COWL WIRE (RIGHT KICK PANEL)
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
EC32 (2JZ-GTE)FRONT SIDE OF INTAKE MANIFOLD
ED32 (2JZ-GTE)REAR SIDE OF INTAKE MANIFOLD
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
E11I4
E1632ENGINE WIREI1738COWL WIRE
E17I20
SERVICE HINTS
Page 1068 of 1807
63
12 12 12
12
X
X XX
XX
256
267
27X
XX
X 58 57
77 X
56
76 55 54 53 52
X X
X16
XXX X
X2
341 2345 6
789 11121012
AA AA
AAAAAAA
12
561
1 BBLACK
S 3 A
S 2 B DARK GRAY E 9A DARK GRAY E10
BBLACK I 3 ABLACK I 2C 1 C 2 C 3 C 9
I 6, I 7, I 8
I 9, I10, I11I19
J 2 N 1 P 2
T1 3 BLACK BLACK DARK GRAY
BL ACK
(
HINT : SEE PAGE 7)GRA Y GRAY
OR ANGEX
X X
X
XX
X XX 25X
X678X
Page 1069 of 1807
123
LIG S B
IC REGULATOR
BW
W
B- O Y- G
Y- G
Y
WY
W
BATTERY
GENERATORAAA B 123 1 II1 34 II123
W
W
A G 1 , G 2B FROM POWER SOURCE SYSTEM (
SEE PAGE 56)
EA2 4
EA3 2(
*1)
(
*2)
W
W
W
I14
Y- G Y- G
Y- G FROM
COMBINATION
METERCHARGE WARNING LIGHT
[ TELL TAL E LI GHT RH] T 6 Y- G
TO DAYTIME RUNNING
LIGHT RELAY(
MAIN)
1E 81E1210A
GA UGE 7. 5A
IGN
22
7. 5A
ALT- S 22
11 120A
ALT
2A 1
68
CHARGING*1 : 2JZ- GTE
*2 : 2JZ- GE
Page 1070 of 1807

69
G2 (A) GENERATOR
(A) 3-GROUND :13.9-15.1 VOLTS WITH THE ENGINE RUNNING AT 2000 RPM AND 25C (77F)
13.5-14.3 VOLTS WITH THE ENGINE RUNNING AT 5000 RPM AND 115C (239F)
(A) 1-GROUND ;0-4 VOLTS WITH THE IGNITION SW AT ON POSITION AND THE ENGINE NOT RUNNING
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
G1B24 (2JZ-GTE)G2A24 (2JZ-GTE)T629G1B26 (2JZ-GE)G2A26 (2JZ-GE)
: 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 WIRE HARNESS (CONNECTOR LOCATION)
1E20INSTRUMENT PANEL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
2A22BATTERY AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
EA232ENGINE WIRE AND ENGINE ROOM MAIN WIRE (NEAR THE R/B NO 2)EA334ENGINE WIRE AND ENGINE ROOM MAIN WIRE (NEAR THE R/B NO. 2)
II138ENGINE WIRE AND INSTRUMENT PANEL WIRE (RIGHT KICK PANEL)
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
I1438INSTRUMENT PANEL WIRE
1
123 B
G 1ABLACK
12 X X X3T 6 G 2
SERVICE HINTS
Page 1071 of 1807

70
ENGINE CONTROL (2JZ-GTE)
THE ENGINE CONTROL SYSTEM UTILIZES A MICROCOMPUTER AND MAINTAINS OVERALL CONTROL OF THE
ENGINE, TRANSMISSION ETC. AN OUTLINE OF THE ENGINE CONTROL IS GIVEN HERE.
1. INPUT SIGNALS
(1) ENGINE COOLANT TEMP. SIGNAL CIRCUIT
THE ENGINE COOLANT TEMP. SENSOR DETECTS THE ENGINE COOLANT TEMP. WHICH IS INPUT INTO
TERMINAL THW OF THE ENGINE CONTROL MODULE AS A CONTROL SIGNAL.
(2) INTAKE AIR TEMP. SIGNAL CIRCUIT
THE INTAKE AIR TEMP. SENSOR IS INSTALLED IN THE MASS AIR FLOW METER AND DETECTS THE INTAKE AIR
TEMP. WHICH IS INPUT AS A CONTROL SIGNAL TO TERMINAL THA OF THE ENGINE CONTROL MODULE.
(3) OXYGEN DENSITY SIGNAL CIRCUIT
THE OXYGEN DENSITY IN THE EXHAUST EMISSION IS DETECTED BY THE HEATED OXYGEN SENSOR SIDE AND
INPUT AS A CONTROL SIGNAL TO TERMINAL OX1, OXS OF THE ENGINE CONTROL MODULE.
(4) RPM SIGNAL CIRCUIT
CRANKSHAFT POSITION IS DETECTED BY THE CRANKSHAFT POSITION SENSOR. CRANKSHAFT POSITION IS
INPUT AS A CONTROL SIGNAL TO TERMINAL NE OF THE ENGINE CONTROL MODULE.
(5) THROTTLE POSITION SIGNAL CIRCUIT
THE THROTTLE POSITION SENSOR DETECTS THE THROTTLE VALVE OPENING ANGLE AS A CONTROL SIGNAL,
WHICH IS INPUT INTO TERMINAL VTA1 OF THE ENGINE CONTROL MODULE. WHEN THE VALVE IS COMPLETELY
CLOSED, THE CONTROL SIGNAL IS INPUT INTO TERMINAL IDL1.
(6) VEHICLE SPEED CIRCUIT
THE VEHICLE SPEED IS DETECTED BY VEHICLE SPEED SENSOR NO. 1 INSTALLED IN THE TRANSMISSION AND
THE SIGNAL IS INPUT TO TERMINAL SP1 OF THE ENGINE CONTROL MODULE VIA THE COMBINATION METER.
(7) NEUTRAL POSITION SIGNAL CIRCUIT
THE PARK/NEUTRAL POSITION SW DETECTS WHETHER THE SHIFT POSITION IS IN Nº AND Pº OR NOT, AND
THE SIGNAL IS INPUT INTO TERMINAL NSW OF THE ENGINE CONTROL MODULE.
(8) A/C SW SIGNAL CIRCUIT
THE OPERATING VOLTAGE OF THE A/C MAGNETIC CLUTCH IS DETECTED AND THE SIGNAL IS INPUT INTO
TERMINAL ACMG OF ENGINE CONTROL MODULE AS A CONTROL SIGNAL.
(9) BATTERY SIGNAL CIRCUIT
VOLTAGE IS CONSTANTLY APPLIED TO TERMINAL BATT OF THE ENGINE CONTROL MODULE. WITH THE
IGNITION SW TURNED ON, THE VOLTAGE FOR ENGINE CONTROL MODULE START-UP POWER SUPPLY IS
APPLIED TO TERMINAL +B OF THE ENGINE CONTROL MODULE VIA EFI MAIN RELAY.
THE CURRENT FLOWING THROUGH THE IGN FUSE FLOWS TO TERMINAL IGSW OF THE ENGINE CONTROL
MODULE.
(10) INTAKE AIR VOLUME SIGNAL CIRCUIT
INTAKE AIR VOLUME IS DETECTED BY THE MASS AIR FLOW METER AND THE SIGNAL IS INPUT TO TERMINAL
VG OF THE ENGINE CONTROL MODULE AS A CONTROL SIGNAL.
(11) STOP LIGHT SW SIGNAL CIRCUIT
THE STOP LIGHT SW IS USED TO DETECT WHETHER THE VEHICLE IS BRAKING OR NOT AND THE SIGNAL IS
INPUT INTO TERMINAL STP OF THE ENGINE CONTROL MODULE AS A CONTROL SIGNAL.
(12) STARTER SIGNAL CIRCUIT
TO CONFIRM WHETHER THE ENGINE IS CRANKING THE VOLTAGE APPLIED TO THE STARTER MOTOR DURING
CRANKING IS DETECTED AND THE SIGNAL IS INPUT IN TERMINAL STA OF THE ENGINE CONTROL MODULE AS
A CONTROL SIGNAL.
(13) ENGINE KNOCK SIGNAL CIRCUIT
ENGINE KNOCKING IS DETECTED BY KNOCK SENSOR FRONT AND REAR SIDE AND THE SIGNAL IS INPUT
TERMINALS KNK1 AND KNK2 AS A CONTROL SIGNAL.
SYSTEM OUTLINE
Page 1072 of 1807

71
2. CONTROL SYSTEM
*SEQUENTIAL MULTIPORT FUEL INJECTION SYSTEM
THE SEQUENTIAL MULTIPORT FUEL INJECTION SYSTEM MONITORS THE ENGINE CONDITION THROUGH THE
SIGNALS INPUT FROM EACH SENSOR (INPUT SIGNALS FROM (1) TO (13) ETC.) TO THE ENGINE CONTROL
MODULE. THE BEST FUEL INJECTION TIMING IS DECIDED BASED ON THIS DATA AND THE PROGRAM
MEMORIZED BY THE ENGINE CONTROL MODULE, AND THE CONTROL SIGNAL IS OUTPUT TO TERMINALS #10,
#20, #30, #40, #50 AND #60 OF THE ENGINE CONTROL MODULE TO OPERATE THE INJECTOR (INJECT THE FUEL).
THE SEQUENTIAL MULTIPORT FUEL INJECTION SYSTEM PRODUCES CONTROLS OF FUEL INJECTION
OPERATION BY THE ENGINE CONTROL MODULE IN RESPONSE TO THE DRIVING CONDITIONS.
*ESA SYSTEM
THE ESA SYSTEM MONITORS THE ENGINE CONDITION THROUGH THE SIGNALS INPUT TO THE ENGINE
CONTROL MODULE FROM EACH SENSOR (INPUT SIGNALS FROM (1), (2), (4) TO (13) ETC.). THE BEST IGNITION
TIMING IS DECIDED ACCORDING TO THIS DATA AND THE MEMORIZED DATA IN THE ENGINE CONTROL MODULE
AND THE CONTROL SIGNAL IS OUTPUT TO TERMINALS IGT1, IGT2, IGT3, IGT4, IGT5 AND IGT6 THESE SIGNALS
CONTROL THE IGNITER TO PROVIDE THE BEST IGNITION TIMING FOR THE DRIVING CONDITIONS.
*HEATED OXYGEN SENSOR HEATER CONTROL SYSTEM
THE MAIN HEATED OXYGEN SENSOR, SUB HEATED OXYGEN SENSOR HEATER CONTROL SYSTEM TURNS THE
HEATER ON WHEN THE INTAKE AIR VOLUME IS LOW (TEMP. OF EXHAUST EMISSIONS IS LOW) AND WARMS UP
THE OXYGEN SENSOR TO IMPROVE DETECTION PERFORMANCE OF THE SENSOR. THE ENGINE CONTROL
MODULE EVALUATES THE SIGNALS FROM EACH SENSOR (INPUT SIGNALS FROM (1), (2), (4), (9) TO (11) ETC.),
AND OUTPUTS CURRENT TO TERMINALS HT1, HTS TO CONTROL THE HEATER
*IDLE AIR CONTROL SYSTEM
THE IDLE AIR CONTROL SYSTEM (STEP MOTOR TYPE) INCREASES THE ENGINE SPEED AND PROVIDES IDLING
STABILITY FOR FAST IDLE-UP WHEN THE ENGINE IS COLD, AND WHEN THE IDLE SPEED HAS DROPPED DUE TO
ELECTRICAL LOAD AND SO ON. THE ENGINE CONTROL MODULE EVALUATES THE SIGNALS FROM EACH
SENSOR (INPUT SIGNALS FROM (1), (4), (5), (8), (9), (11) ETC.), OUTPUTS CURRENT TO TERMINALS ISC1, ISC2,
ISC3 AND ISC4 TO CONTROL THE IDLE AIR CONTROL VALVE.
*EGR CONTROL SYSTEM
THE EGR CONTROL SYSTEM DETECTS THE SIGNAL FROM EACH SENSOR (INPUT SIGNALS FROM (1), (4), (9), (10)
ETC.), AND OUTPUTS CURRENT TO TERMINAL EGR TO CONTROL THE EGR VALVE.
*FUEL PUMP CONTROL SYSTEM
THE ENGINE CONTROL MODULE OUTPUTS CURRENT TO TERMINAL FPC AND CONTROLS THE FUEL PUMP ECU
AND FUEL PUMP DRIVE SPEED IN RESPONSE TO THE DRIVING CONDITIONS
3. DIAGNOSIS SYSTEM
WITH THE DIAGNOSIS SYSTEM, WHEN THERE IS A MALFUNCTION IN THE ENGINE CONTROL MODULE SIGNAL
SYSTEM, THE MALFUNCTIONING SYSTEM IS RECORDED IN THE MEMORY. THE MALFUNCTIONING SYSTEM CAN BE
FOUND BY READING THE CODE DISPLAYED BY THE MALFUNCTION INDICATOR LAMP.
4. FAIL-SAFE SYSTEM
WHEN A MALFUNCTION HAS OCCURRED IN ANY SYSTEM, IF THERE IS A POSSIBILITY OF ENGINE TROUBLE BEING
CAUSED BY CONTINUED CONTROL BASED ON THE SIGNALS FROM THAT SYSTEM, THE FAIL-SAFE SYSTEM
EITHER CONTROLS THE SYSTEM BY USING DATA (STANDARD VALUES) RECORDED IN THE ENGINE CONTROL
MODULE MEMORY OR ELSE STOPS THE ENGINE.