1999 TOYOTA CAMRY ignition

* 1 : W/ ENGINE IMMOBILISER SYSTEM
* 2 : W/O ENGINE IMMOBILISER SYSTEM* 3 : TMC MADE
* 4 : TMMK MADE
B±R
A 22A 22
C 20C 23
C 3C 17
C 19(
*2) C 22(
*1)
A 11(
*2) A 11(
*1) NSW IGT1 IGF IGT2
STAI 2A A
EC
BR BR BRY±R W± RBR W± RB
W±R
IGT IGF GND IGF IGT GND+B +B
A
B± W
BB
1
GR(
*3)
B±O(
*4)
B±R
B±R
B±R
B±WJUNCTION CONNECTOR
IGNITION COIL
AND IGNITER
NO. 1IGNITION COIL
AND IGNITER
NO. 2
NOISE FILTER
(
IGNITION)
JUNCTION
CONNECTOR J25
I 3 I 4
J19
N 1
E 7
ENGINE CONTROL MODULEC A, E 9 BB
23432411
W±R

STARTING AND IGNITION (5S±FE)
I16 IGNITION SW
7±6 : Closed with the ignition SW at ON or ST position
7±8 : Closed with the ignition SW at ST position
P1 PARK/NEUTRAL POSITION SW
5±6 : Closed with the A/T shift lever in P or N position (A/T)
S1 (B), S2 (A) STARTER
Points closed with the Park/Neutral position SW at P or N position 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
C730I1630N129 (5S±FE)
E7A30J7A31P129 (5S±FE)
E9C30J8B31S1B29 (5S±FE)
F4A28 (5S±FE)J1131S2A29 (5S±FE)
F6C28 (5S±FE)J1931
I329 (5S±FE)J2531
I429 (5S±FE)J2931
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1B
1J20Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1K
()
2A
2B22Engine Room Main Wire and Engine Room J/B No.2 (Engine Compartment Left)
2D
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)
II242Engine Wire and Cowl Wire (Under the Blower Motor)II342Engine Wire and Cowl Wire (Under the Blower Motor)
: GROUND POINTS
CodeSee PageGround Points Location
EC38 (5S±FE)Surge Tank RH
IG40Instrument Panel Brace LH
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
I242Engine Wire
SERVICE HINTS

CHARGING
SLIG B
IC REGULATOR 2A 11T 81J2
A 3A1A2 C C
B 1 10A
GAUGE 5A
IGN
30A
AM2
B±G
YB±R B±G
B±G
B±G
BATTERY FL MAIN
3. 0W
JUNCTION
CONNE CTOR
YJ 1
TO DAYTIME RUNNING
LIGHT RELAY (
MAIN)
Y C
(
*1) B 1
A 1
B A F 1B±R 100A ALT
* 2 : W/O DA YTIME RUNNING LIGHT
F 2C1A 13
B 4
IK2 4 5A
ALT±S 2L 42C31K 31K1 2
74
6 AM2 AM1ACC
IG1
ST1
IG2
ST2
140A
AM1 1K 21K5
1B 11B5
E 3
B B±RB±R
WW± R W± RW
IGNITION SW I16B±RB±Y
Y
R±LR±L IG2 4
Y
(
*2)
(
*1)Y
(
*1)
2
1
EB1 6
F 4 , F 5 ,
G 1
GENERATORA B, G 2
C 8
CHARGE WARNING LIGHT
[COMB. METER]B A, C 9
F 6
FUSIBLE LINK
BLOCKF C, F 9* 1 : W/ DAYTIME RUNNING LIGHT

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
C8A30F6C26 (1MZ±FE)G2A26 (1MZ±FE)
C9B30F6C28 (5S±FE)G2A28 (5S±FE)
F4A26 (1MZ±FE)F9F26 (1MZ±FE)I1630F4A28 (5S±FE)F9F28 (5S±FE)J131
F5B26 (1MZ±FE)G1B26 (1MZ±FE)F5B28 (5S±FE)G1B28 (5S±FE)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1B
1J20Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1K
()
1T20Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
2A22Engine Room Main Wire and Engine Room J/B No 2 (Engine Compartment Left)2C22Engine Room Main Wire and Engine Room J/B No.2 (Engine Compartment Left)
2L22Cowl 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)
EB136 (1MZ±FE)Cowl Wire and Engine Room Main Wire (Under the Engine Room J/B No 2)EB138 (5S±FE)Cowl Wire and Engine Room Main Wire (Under the Engine Room J/B No.2)
IG240Instrument Panel Wire and Cowl Wire (Lower Finish Panel)
IK242Engine Room Main Wire and Cowl Wire (Right Kick Panel)
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
E336 (1MZ±FE)Cowl WireE338 (5S±FE)Cowl Wire
SERVICE HINTS

ENGINE CONTROL (1MZ±FE)
76
8 AM2 IG2
ST2
30A
AM2
5A IGN
1K 5
2L 41W 7 1K 311
1B 5
2A 11C 811
EB1 5
II3 12EB1 4
ID1 7
1 2
1 2
1 2
1 2
1 2
1 25 4 23 15
C 1
A 1
BL AAAAAAA
AG± R
G
R±L
W
Y
R
L B±R B(
*1)
B±R
B±RB±W W± R B B±GW±R
L±B L±B L±B W±BG±RB±R B±R
B±R B±R B±R B±R B±R B±R
G R±LWY RL
G±R
1J 3
1K 4
R
IGNITION SW
CIR OPN RELAY
JUNCTION CONNECTOR
JUNCTION
CONNECTORFUEL
PUMP I16
J18
F1 4
J40
INJECTOR NO. 1
INJECTOR NO. 2
INJECTOR NO. 3
INJECTOR NO. 4
INJECTOR NO. 5
INJECTOR NO. 6 I 8
I 9
I10
I11
I12
I13FUSIBLE LINK
BLOCKC F 4 F 6A
FL MAIN
3. 0W
BATTERY
5A STARTER
B±R
,
32 5125A
A/F
HTR FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
1
2 2 2
W±BA/F HTR RELA Y
ES11B±W
B
B
B±W B±W
B A
A C
A C
J35
JUNCTION
CONNECTORB A,
L
B±W
B±W B±W W±B
2R
B±R
J3 6
(
*1)(
*1)
(
*1)
(
*1) (
*1)
1
2IK17
I 1 B±R
B±R B±RB±R
(
*1)
W±B
M

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 water temp. 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 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 TERMINALS OXL1, OXR1
(Except California) and OXS of the engine control module. To maintain stable detection performance by the heated
oxygen sensor, a heater is used for warming the sensor. The heater is also controlled by the engine control module
(HTL, HTR (Except California) and HTS).
(4) RPM signal circuit
Camshaft position and crankshaft position are detected by the camshaft position sensor and crankshaft position sensor.
The camshaft position is input as a control signal to TERMINAL G22+ of the engine control module, and the engine
RPM is input into TERMINAL NE+.
(5) Throttle 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.
(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
The Park/Neutral position SW detects whether the shift position is 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 control assembly (Automatic A/C) or A/C Amplifier (Manual A/C) inputs the A/C operations into TERMINAL A/C
of the engine control module as a control signal.
(9) Battery signal circuit
(California or w/ engine immobiliser and/or traction control)
Voltage is always supplies to TERMINAL BATT of the engine control module.
If you turn on the ignition SW, the current goes from TERMINAL MREL of the engine control module to the EFI relay and
put on the relay, and the voltage related to the engine control module operation is supplied to TERMINAL +B of the
engine control module through the EFI relay.
(Except California or w/ engine immobiliser and/or traction control)
Voltage is constantly applied to TERMINAL BATT of the engine control module. When the ignition SW is turned on,
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 mass air flow meter and a signal is input into TERMINAL VG of the engine control
module as a control signal.
(11) NSW 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 the knock sensor 1 and 2, then the signals are input into TERMINALS KNKR and KNKL
of the engine control module as a control signal.
(13) Air fuel ratio signal circuit (California)
The air fuel ratio is detected and input as a control signal into TERMINALS AFL+, AFR+ of the engine control module.
SYSTEM OUTLINE

ENGINE CONTROL (1MZ±FE)
2. CONTROL SYSTEM
*SFI system
The SFI system monitors the engine condition through the signals, which are input from each sensor (Input signals (1) to
(12) ). 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, #40, #50 and #60 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, 3, 4, 12). 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 and IGT3. This signal
controls the igniter to provide the best ignition timing for the driving conditions.
*Heated oxygen sensor heater control system
The 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 heated oxygen sensor to improve detection performance of the sensor.
The engine control module evaluates the signals from each sensor (Input signals from 1, 4, 9, 10), current is output to
TERMINALS HTL, HTR and HTS, controlling the heater.
*Idle air control system
The idle air control system (Rotary solenoid type) increases the RPM and provides idle 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), current is output to TERMINALS RSO and RSC
to control idle air control valve.
*EGR control system
The EGR control system detects the signal from each sensor (Input signals from 1, 4, 9, 10), and outputs current to
TERMINAL EGR to control the VSV (EGR).
The EGR valve position sensor is mounted on the EGR valve. this sensor converts the EGR valve opening height into a
voltage and sends it to the engine control module as the EGR valve position signal.
*ACIS
ACIS includes a valve in the bulkhead separating the surge tank into two parts. This valve is opened and closed in
accordance with the driving conditions to control the intake manifold length in two stages for increased engine output in
all ranges from low to high speeds.
The engine control module judges the engine speed by the signals ( (4), (5) ) from each sensor and outputs signals to
the TERMINAL ACIS to control the VSV (Intake air control).
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.
4. FAIL±SAFE SYSTEM
When a malfunction occurs in any systems, 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.

E5 ENGINE COOLANT TEMP. SENSOR
1±2 : Approx. 15.04 kW (±20C, ±4F)
Approx. 5.74 kW (0C, 32F)
Approx. 2.45 kW (20C, 68F)
Approx. 1.15 kW (40C, 104F)
Approx. 0.584 kW (60C, 140F)
Approx. 0.318 kW (80C, 176F)
E7 (A), E8 (B), E9 (C), E10 (D), E11 (E)
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 : Always 4.5±5.5 volts (Ignition SW at ON position)
VTA1±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 fully open)
VG±E2G :1.1±1.5 volts (Engine idling and A/C SW OFF position)
THA±E2 :0.5±3.4 volts (Engine idling and intake air temp. 20°C, 68°F)
THW±E2 :0.2±1.0 volts (Engine idling and engine coolant temp. 80°C, 176°F)
IGF±E1 :4.5±5.5 volts (Ignition SW at ON position)
Pulse generation (Engine idling)
G22+±NE± : Pulse generation (Engine idling)
NE+±NE± : Pulse generation (Engine idling)
NSW±E1 :9.0±14.0 volts (Ignition SW on and other shift position in P or N position)
Below 3.0 volts (Ignition SW on and shift position in P or N position)
SPD±E1 : Pulse generation (Ignition SW on and rotate driving wheel slowly)
TC±E1 :9.0±14.0 volts (Ignition SW at ON Position)
W±E1 : Below 3.0 volts
A/C±E1 : Below 2.0 volts (Engine idling and A/C SW on)
9.0±14.0 volts (A/C SW off)
ACT±E1 :9.0±14.0 volts (Engine idling and A/C SW on)
Below 2.0 volts (A/C SW off)
ACIS±E01 :9.0±14.0 volts (Ignition SW at ON position)
STA±E1 :6.0 volts or more (Engine cranking)
THG±E2 :4.5±5.5 volts (Ignition SW at ON position)
ELS±E1 :7.5±14.0 volts (Taillight SW at ON position)
0±1.5 volts (Taillight SW at OFF position)
ELS2±E1 :7.5±14.0 volts (Defogger SW at ON position)
0±1.5 volts (Defogger SW at OFF position)
EGR±E01 :9.0±14.0 volts (Ignition SW at ON position)
FC±E1 :9.0±14.0 volts (Ignition SW at ON position)
0±3.0 volts (Engine idling)
EVP1±E01 :9.0±14.0 volts (Ignition SW at ON position)
CF±E1 :9.0±14.0 volts (Electric cooling fan is operating on high speed)
0±2.0 volts (Electric cooling fan is operating on low speed or off)
TACH±E1 : Pulse generation (Engine idling)
TPC±E1 :9.0±14.0 volts (Ignition SW on and disconnect the vacuum hose from the vapor pressure sensor)
PTNK±E1 :3.0±3.6 volts (Ignition SW at ON position)
1.3±2.1 volts (Ignition SW on and apply vacuum 2.0 kpa (15.0 mmHg, 0.6 in.Hg)
STP±E1 :7.5±14.0 volts (Ignition SW on and brake pedal depressed)
Below 1.5 volts (Ignition SW on and brake pedal released)
SIL±E1 : Pulse generation (During transmission)
RSC, RSO±E01 :9.0±14.0 volts (Ignition SW on and disconnect E 7 of engine control module connector)
KNKL, KNKR±E1 : Pulse generation (Engine idling)
HTS, HTL, HTR±E03 :9.0±14.0 volts (Ignition SW at ON position)
0±3.0 volts (Engine idling)
OXS, OXL, OXR±E1 : Pulse generation (Maintain engine speed at 2500 rpm for two minutes after warning up)
IGT1, IGT2, IGT3±E1 : Pulse generation (Engine idling)
#10, #20, #30, #40, #50, #60±E01 :9.0±14.0 volts (Ignition SW at ON position)
Pulse generation (Engine idling)
SERVICE HINTS