TOYOTA CAMRY 1999 Service Repair Manual

ENGINE CONTROL (5S±FE)
EC EC I 2 II3 2II31 II2 12
C 21 B5A9A5A16
C 15 C26 C 13 C25 A9
A3 1
A42
A
A
A
A
A
B±YBR BR BR
BR BR
V±W
G± R
W
BR
G±W BR
BR
BR
BR
BR
BR
BR
BR
BR HT2 OX2 SPD W SIL
STP E03 E0 2 E01 E04
G± WBR BR
BR BR BR BR
BR
BR
BR
W G± R V±WB P±B
B P±B BR
BR
B±Y
(
SHIELDED)
(
*6)
HEATED OXYGEN
SENSOR
(
BANK 1 SENSOR 2) H 8
(
*6)
(
*5)
JUNCTION
CONNECTOR J2 3ENGINE CONTROL MODULEB E 7 E 8ACE 9
C 24E1
A
BR
A 7
B±O TACH
B±O
E1 +B
HT OX
C 15 C26 C 13 B16 A4 C 14A 8(
*1)
(
*2) , , DE10 , C 14 B13 A8A4A6(
*1)
(
*2)
D 2
BR EOM
A

IGIH II3 6II2 2
IJ1 7IJ12 IG3 10C 2B15 C6C5 A A
B B
B CA A B A A CC 7B14 7. 5A
OBD FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
1J 1015A
ST OP
1C 710A
GAUGE FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
1D 2
MALFUNCTION
INDICATOR LAMP
SPEEDOMETER
1J 1
IG33
1J 71R51R 4 1J 81 2
54
AD
12 3 A 16 7
ABD
B
CG SG W G±R V±W
BR
G± WV±W R±L
BAT SIL
BR
W±B W±BBR
G± W BR
W±B
G±WWB
R±L R±L
V±W R±L R±L
G±R
L
P
BR PL G±RR±L
R±L
G±R
R±L
BR
COMBINATION METERC C 9 C10B
JUNCTION
CONNECTORJUNCTION
CONNECTOR JUNCTION
CONNECTOR
STOP LIGHT SWDATA LINK
CONNECTOR 3
J15J 4
J21
S 6D 5
JUNCTION
CONNECTORB J 7 J 8AJUNCTION CONNECTORB J 7 J 8A
JUNCTION
CONNECTORB J27 J28A
JUNCTION
CONNECTOR
VEHICLE SPEED SENSOR
(
COMBINATION METER) V 2
J11SI SE
IG+
* 6 : EXCEPT CALIFORNIA * 5 : CALIFORNIA (
SHIELDED)
I 3IG3 6C 8
TACHOMETER
B±O B±O
B±O
B±O
BF
BF
A F JUNCTION
CONNECTORJ28 B
,
J27
JUNCTION
CONNECTORA
A F ,
,
A C CC
I 5 JUNCTION CONNECTOR J 3
BR(
SHIELDED)
(
SHIELDED) W
* 1 : W/ ENGINE IMMOBILISER SYSTEM
* 2 : W/O ENGINE IMMOBILISER SYSTEM
,

ENGINE CONTROL (5S±FE)
This system utilizes an engine control module and maintains overall control of the engine, transmission and so on. An outline
of the engine control is explained here.
1. INPUT SIGNALS
(1) Engine coolant temp. signal circuit
The engine coolant temp. sensor detects the engine coolant temp. and has a built±in thermistor with a resistance which
varies according to the engine coolant temp. thus the engine coolant temp. is input in the form of a control signal into
TERMINAL THW of the engine control module.
(2) Intake air temp. signal circuit
The intake air temp. sensor detects the intake air temp., which is input as a control signal into TERMINAL THA of the
engine control module.
(3) Oxygen sensor signal circuit
The oxygen density in the exhaust gases is detected and input as a control signal into TERMINAL OX1 (except
California) and OX2 of the engine control module.
(4) RPM signal circuit
Camshaft position and crankshaft position are detected by the camshaft position sensor and crankshaft position sensor.
Camshaft position is input as a control signal to TERMINAL G+ of the engine control module, and engine RPM is input
into TERMINAL NE+.
(5) Throttle signal circuit
The throttle position sensor detects the throttle valve opening angle, which is input as a control signal into TERMINAL
VTA of the engine control module.
(6) Vehicle speed signal circuit
The vehicle speed sensor, installed inside the transmission, detects the vehicle speed and inputs a control signal into
TERMINAL SPD of the engine control module.
(7) Park/Neutral position SW signal circuit (A/T)
The Park/Neutral position SW detects whether the shift position are in neutral, parking or not, and inputs a control signal
into TERMINAL STA of the engine control module.
(8) A/C SW signal circuit
The A/C amplifier function is built in the engine control module. The A/C SW signal inputs into the TERMINAL A/C SW of
the engine control module.
(9) Battery signal circuit
Voltage is constantly applied to TERMINAL BATT of the engine control module. When the ignition SW is turned on, the
voltage for engine control module start±up power supply is applied to TERMINAL +B of engine control module via EFI
relay.
(10) Intake air volume signal circuit
Intake air volume is detected by the manifold absolute pressure sensor (for manifold pressure) and is input as a control
signal into TERMINAL PIN of the engine control module.
(11) 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 into TERMINAL NSW of the engine control module as a control signal.
(12) Engine knock signal circuit
Engine knocking is detected by knock sensor 1 and the signal is input into TERMINAL KNK as a control signal.
(13) Electrical load signal circuit
The signal when systems such as the rear window defogger, headlights, etc. Which cause a high electrical burden are
on is input to TERMINAL ELS as a control signal.
(14) Air fuel ratio signal circuit (California)
The air fuel ratio is detected and input as a control signal into TERMINAL AF+ of the engine control module.
SYSTEM OUTLINE

2. CONTROL SYSTEM
*SFI system
The SFI system monitors the engine condition through the signals, which are input from each sensor (Input signals from
(1) to (14) etc.) to the engine control module. The best fuel injection volume 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 and
#40 of the engine control module to operate the injector. (Inject the fuel). The SFI system produces control 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, which are input to the engine control module from
each sensor (Input signals from (1), (2), (4) to (12) etc.) the best ignition timing is detected according to this data and the
memorized data in the engine control module, and the control signal is output to TERMINALS IGT1 and IGT2. This
signal controls the igniter to provide the best ignition timing for the driving conditions.
*Idle Air Control system
The IAC system (Step motor type) increases the RPM and provides idling stability for fast idle±up when the engine is
cold and when the idle speed has dropped due to electrical load, etc. The engine control module evaluates the signals
from each sensor (Input signals (1), (4) to (8), (13) etc.), outputs current to TERMINALS ISCO and ISCC, and controls
the idle air control valve.
*Fuel pump control system
The engine control module operation outputs to TERMINAL FC and controls the CIR OPN relay. Thus controls the fuel
pump drive speed in response to conditions.
*EGR control system
The EGR cut control system controls the VSV (EGR) by evaluating the signals from each sensor which are input to the
engine control module (Input signals (1), (5), (6), (9) etc.) and by sending output to TERMINAL EGR of the engine
control module.
*A/C conditioning operation system
In addition to the conventional A/C cut control, the engine control module performs the air conditioning operation as well
since the A/C amplifier function is built in it.
3. DIAGNOSIS SYSTEM
With the diagnosis system, when there is a malfunctioning in the engine control module signal system, the malfunction
system is recorded in the memory. The malfunctioning system can then be found by reading the display (Code) of the
malfunction indicator lamp.
4. FAIL±SAFE SYSTEM
When a malfunction occurs 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.
E7 (A), E8 (B), E9 (C), E10 (D) ENGINE CONTROL MODULE
Voltage at engine control module wiring connector
BATT±E1 : Always 9.0±14.0 volts
+B±E1 :9.0±14.0 volts (Ignition SW at ON position)
VC±E2 :4.5± 5.5 volts (Ignition SW at ON position)
VTA±E2 :0.3± 0.8 volts (Ignition SW on and throttle valve fully closed)
3.2±4.9 volts (Ignition SW on and throttle valve open)
PIM±E2 :3.3± 3.9 volts (Ignition SW at ON position)
THA±E2 :0.5±3.4 volts (Ignition SW on and intake air temp. 20°C, 68°F)
THW±E2 :0.2± 1.0 volts (Ignition SW on and coolant temp. 80°C, 176°F)
STA±E1 :6.0±14.0 volts (Engine cranking)
W±E1 :9.0±14.0 volts (No trouble and engine running)
TE1±E1 :9.0±14.0 volts (Ignition SW at ON position)
NSW±E1 :0± 3.0 volts (Ignition SW on and Park/Neutral position SW position P or N position)
9.0±14.0 volts (Ignition SW on and except Park/Neutral position SW position P or N position)
IGT1, IGT2±E1 : Pulse generation (Engine cranking or idling)
#10, #20, #30, #40±E01, E02 :9.0±14.0 volts (Ignition SW at ON position)
RESISTANCE AT ENGINE CONTROL MODULE WIRING CONNECTORS
(Disconnect wiring connector)
VC±E2 :2.5±5.0 kW
THA±E2 :2.21±2.69 kW (Intake air temp. 20°C, 68°F)
THW±E2 :0.29±0.354 kW (Coolant temp. 80°C, 176°F)
SERVICE HINTS

ENGINE CONTROL (5S±FE)
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A1128 (5S±FE)H830J2131
A1330H930J2331
A1430I129 (5S±FE)J2531
C128 (5S±FE)I329 (5S±FE)J27A31
C228 (5S±FE)I429 (5S±FE)J28B31
C730I829 (5S±FE)J2931
C9B30I929 (5S±FE)J4032
C10C30I1029 (5S±FE)K129 (5S±FE)
D128 (5S±FE)I1129 (5S±FE)M129 (5S±FE)
D530I1429 (5S±FE)P129 (5S±FE)
D1130I1630P229 (5S±FE)
E528 (5S±FE)J331S631
E7A30J431T229 (5S±FE)
E8B30J7A31T331
E9C30J8B31V129 (5S±FE)
E10D30J1031V229 (5S±FE)
F4A28 (5S±FE)J1131V429 (5S±FE)
F6C28 (5S±FE)J1231V529 (5S±FE)
F1432J1531V729 (5S±FE)
H328 (5S±FE)J1931
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
124Engine Room R/B No.1 (Engine Compartment Left)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1B20Cowl Wire and Instrument Panel J/B (Lower Finish Panel)1C20Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1D20Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1J
1K20Cowl Wire and Instrument Panel J/B (Lower Finish Panel)1R20Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1W
2A
2C22Engine Room Main Wire and Engine Room J/B No.2 (Engine Compartment Left)
2F
gg(g)
2J
2K22Cowl Wire and Engine Room J/B No.2 (Engine Compartment Left)
2L
g(g )

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
EB138 (5S±FE)Cowl Wire and Engine Room Main Wire (Under the Engine Room J/B No.2)
ID140Floor Wire and Cowl Wire (Left Kick Panel)
IG340Instrument Panel Wire and Cowl Wire (Under the Blower Motor)
II2
II342Engine Wire and Cowl Wire (Under the Blower Motor)
II4
g()
IJ142Engine Wire and Instrument Panel Wire (Under the Blower Motor)
IK142Engine Room Main Wire and Cowl Wire (Right Kick Panel)IK242Engine Room Main Wire and Cowl Wire (Right Kick Panel)
: GROUND POINTS
CodeSee PageGround Points Location
EB38 (5S±FE)Left Radiator Side Support
EC38 (5S±FE)Intake Manifold
IG40Instrument Panel Brace LH
IH40Instrument Panel Brace RH
BL44Under the Left Center Pillar
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
E338 (5S±FE)Cowl WireI3
I142Cowl WireI542Cowl Wire
I242Engine WireI6
2 1
3412
1


5
121212

14












15


8 7 5

2



6












14

15


8 7 6 5

2



DARK GRAY
A13 A14DARK GRAYC7
C9 (B)
BROWN
A11 C1 C2
C10 (C)DARK GRAY
C9 (B)(TMC Made)
(TMC Made) BROWN
C10 (C)
(TMMK Made)

ENGINE CONTROL (5S±FE)
XX3
X
X
X8 X X

12 X XX

XXX
X


X1232 1
12

4
67891011
12 13
14



19 20 212212

45X
891011
12 13
14 15 16



212212345678
9 1011121314151612345678
9 10111213141516
12
34X67
91011 12 13
14 15
X17X19

22 2324 25 26
2
345

891011 12 13
14 15
X 1718192021222324 25 261234X6
7 8 9 X 11 12
1
16XXXXXXX
X7 X 5 4 XXX BLACK
D5ORANGE GREEN
(* 1) (* 2) (* 1) DARK GRAY (* 2)
(* 1) DARK GRAY (* 2) DARK GRAY
F4 (A) D1D11 E5
E7 (A) E7 (A) E8 (B) E8 (B)
E9 (C) E9 (C) E10 (D)
1



452 1
342 1
34
2







12312341234121212
1212
X



X678
X X






DDDX


CC






CC
F6 (C) F14DARK GRAY DARK GRAYH9
GRAY GRAY BLACK BROWN GRAY BROWN
GRAY BLACK
I16 J3
(Hint : See Page 7)(Hint : See Page 7)BLACK
H3 H8
I1 I3 I4 I8 I9 I10
I11 I14J4
* 1 : w/ Engine Immobiliser System
* 2 : w/o Engine Immobiliser System

B



BBB
AAAAAA
B B BCCC
AA AA
AAAAAAA
AAAAAA
B B BCCC






DDD



AA
AAAA
B B A A A






BB B









BAAA BB
AAABBBBBAAA BB
AAABBBBB
AABB




EE F F

BBCC


EE F F GRAY GRAY BLACK
J11
(Hint : See Page 7) (Hint : See Page 7) (Hint : See Page 7)(Hint : See Page 7)
BLACK GRAY GRAY
J23 J25 J27 (A) J28 (B)
BLACK
(Hint : See Page 7) (Hint : See Page 7)
(Hint : See Page 7) (Hint : See Page 7)
(Hint : See Page 7)
(Hint : See Page 7)
(Hint : See Page 7) (Hint : See Page 7)
J7 (A) J8 (B) J10
J12 J15 J19 J21
1123
1123
XXXX6

X




1231212
X

56






1

2


AA
AAAA




BBBB














(Hint : See Page 7)
J29 J40
(Hint : See Page 7)DARK GRAY BLACK
GRAY BLACK BLUE BLACK
T3
BLACK BLACK BLUE BLACK BLUE
K1 M1
P1 P2 S6 T2
V1 V2 V4 V5 V7
12312

ENGINE IMMOBILISER SYSTEM
15A
EFI
32 51
2J 22C52F42K7
II4 6
D 7(
*2) A 8(
*1)
D 8C 4
D 3C 5
D 9(
*2) C 10(
*1)
II4 1 II44II42 B EA EAB A B
EBIE B±W
(
*1)
B±W
(
*2) B±W
(
*2)
B±W
(
*1) W±B
W±BB±Y
G± W
(
*2)
R±L
(
*2)
L±Y
(
*2) L±Y
(
*2) R±L
(
*2) G± W
(
*2)G±W
(
*1)
W±B
CODE RXCK TXCTMREL FROM POWER SOURCE SY STEM (
SEE PAGE 50)
EFI
RELAY
B±Y
L±Y
(
*1) R±L
(
*1)
E 7
ENGINE CONTROL
MODULEC A, E 9 D, E10
B±Y
J27
JUNCTION
CONNECTORB A, J28
5 1 234
B±YTRANSPONDER
KEY COIL
TRANS PONDER
KEY AMPLIFIER T 7
W± B W± B
* 1 : 1MZ± FE
* 2 : 5S±FE
JUNCTION
CONNECTOR J35 C
C

: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
E7A30J27A31T731
E9C30J28B31
E10D30J3531
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
2C22Engine Room Main Wire and Engine Room J/B No 2 (Engine Compartment Left)2F22Engine Room Main Wire and Engine Room J/B No.2 (Engine Compartment Left)
2J22Cowl Wire and Engine Room J/B No 2 (Engine Compartment Left)2K22Cowl Wire and Engine Room J/B No.2 (Engine Compartment Left)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
II442Engine Wire and Cowl Wire (Under the Blower Motor)
: GROUND POINTS
CodeSee PageGround Points Location
EB36(1MZ±FE)Left Radiator Side SuportEB38(5S±FE)Left Radiator Side Suport
IE40Cowl Side Panel LH



XX

8
X
X




X







XXX4 5 X
XXX10
X

XX
X


3
X

789X


12345


BB




EE






CC















EE

(1MZ±FE)
(1MZ±FE) (5S±FE) DARK GRAY
J27 (A)
J28 (B) J35 T7
(Hint : See Page 7)
(Hint : See Page 7) (Hint : See Page 7)
E7 (A) E9 (C) E10 (D)