1999 TOYOTA CAMRY relay

POWER SOURCE
HEAD RELAY [ENGINE ROOM J/B NO.2]
2±1 : Closed with the light control SW at HEAD position or the dimmer SW at FLASH position
Closed with the engine running and the parking brake pedal released (Parking brake SW off) (w/ Daytime Running
Light)
TAILLIGHT RELAY [INSTRUMENT PANEL J/B]
5±3 : Closed with the light control SW at TAIL or HEAD position
I16 IGNITION SW
2±3 : Closed with the ignition SW at ACC or ON position
2±4 : Closed with the ignition SW at ON or ST position
7±6 : Closed with the ignition SW at ON or ST position
7±8 : Closed with the ignition SW at ST position
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
F4A26 (1MZ±FE)F7D26 (1MZ±FE)G126 (1MZ±FE)F4A28 (5S±FE)F7D28 (5S±FE)G128 (5S±FE)
F5B26 (1MZ±FE)F8E26 (1MZ±FE)I1630F5B28 (5S±FE)F8E28 (5S±FE)J1131
F6C26 (1MZ±FE)F9F26 (1MZ±FE)F6C28 (5S±FE)F9F28 (5S±FE)
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
124Engine Room R/B No.1 (Engine Compartment Left)
224Engine Room R/B No.2 (Near the Battery)
325Engine Room R/B No.3 (Radiator Upper Support RH)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1A
1B20Cowl Wire and J/B Instrument Panel J/B (Lower Finish Panel)1J20Cowl Wire and J/B Instrument Panel J/B (Lower Finish Panel)
1K
2A
2B
2C22Engine Room Main Wire and Engine Room J/B No.2 (Engine Compartment Left)
2F
gg(g)
2G
2K22Cowl Wire and Engine Room J/B No 2 (Engine Compartment Left)2L22Cowl Wire and Engine Room J/B No.2 (Engine Compartment Left)
: GROUND POINTS
CodeSee PageGround Points Location
EB36 (1MZ±FE)Left Radiator Side SupportEB38 (5S±FE)Left Radiator Side Support
IG40Instrument Panel Brace LH
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
E336 (1MZ±FE)Cowl WireI142Cowl WireE338 (5S±FE)Cowl Wire
SERVICE HINTS

STARTING AND IGNITION (1MZ±FE)
2L 4
2A 1
IG M 1
B1
B±RB±R
B±G
B±RB
IGNITION SW
32 51
30A
AM2ST
RELAY
PARK/NEUTRAL
POSITION SW
BATTERY FL MAI N
3. 0WI16
P 1
AP
N5
6 2D 52K92J11 40A
MAIN 76
8 AM2 AM1ACC
IG1
ST1
IG2
ST2
5A
ST ARTER
1J 31K 4
1B 51K 5
W± R
2B 3
JUNCTION
CONNECTOR J1 1
W±B
B
AB
BB±W
GR(
*1) B
GR(
*1 A/T)
GR
B±WW±R
B±R
(
A/T)
JUNCTION
CONNECTOR J29
C 1
B C A 1
A BAB 1K3
1C8
II2 11
2 1
II2 10
B±O(
*2) R
B±W
GR(
*1)
B±O(
*2)
B±O B±W GR(
*1) B±O(
*2)
W±B
B±O(
*2 M/T)(
M/T)
(
*2 A/T)CLUTCH START S W C 7
B±W
(
A/T)
1 2
J 7
JUNCTION
CONNECTORB A, J 8
S 1
STARTERA B, S 2 F 4
FUSIBLE LINK
BLOCKC A, F 6
B C
(
A/T) GR
(
*1 M/T)
B±W

STARTING AND IGNITION (5S±FE)
2L 4
2A 1
IG M 1
B1
B±R
B±G
B±RB
IGNITION SW
32 51
30A
AM2ST
RELAY
PARK/NEUTRAL
POSITION SW
BATTERY FL MAI N
3. 0WI16
P 1
AP
N5
6 2D 52K92J11 40A
MAIN 76
8 AM2 AM1ACC
IG1
ST1
IG2
ST2
5A
ST ARTER
1J 31K 4
1B 51K 5
W± R
2B 3
JUNCTION
CONNECTOR J1 1
W±B
B
AB
BB±W
GR(
*3) B
GR(
*3 A/T)
GR
B±WW±R
(
A/T)
JUNCTION
CONNECTOR J29
C 1
B C A 1
A BABII2 11
2 1
II2 10
B±O(
*4) RB±W
GR(
*3)
B±O(
*4)
B±O B±W GR(
*3) B±O(
*4)
W±B
B±O(
*4 M/T)(
M/T)
(
*4 A/T)CLUTCH START SW C 7
B±W
(
A/T)
1 2
J 7
JUNCTION
CONNECTORB A, J 8
S 1
STARTERA B, S 2 F 4
FUSIBLE LINK
BLOCKC A, F 6B±RB±R
II3 13
B±R
B C
GR
(
*3 M/T)
(
A/T)
B±W

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

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

2K 7
2F 42C10 23 15
E 4E3E2E1DD5 B BBB A BAB
A 16 A1
EB15A
EFI FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
II3 9
B±Y B±Y B±Y
B±Y B±W
B±R
G
R±L
W
Y
R
LB±Y
B±YB±YB±R W± B
R±L
W
Y
R
L W± B
EFI RELAY
B±Y
+B BATT
ENGINE CONTROL MODULEB E 7 E 8ACE 9 FC
#60 #50 #40 #30 #20 #10 2C 5
W± B
B 16NEO
BR±W
A 14EFI+
W
A 21EFI±
B
A 13TRC+
LG
A 20TRC±
L
FROM ABS AND
TRACTI ON ECU 2J8
A EAE
B±Y
, , ,
A2
B±R
W± B B±W B±W
2
2J
B±W
B±Y B±Y
B(
*1)
B(
*1)
B±Y
B± Y
D E10 EE11 , 3
A G±R
G IGSWMRELA BB C
A 7P
N5 B±W B
JUNCTION
CONNECTORB J 7 J 8A
PARK/NEUTRAL
POSITION SW
JUNCTION
CONNECTOR
P 1
J29
STAB 20 B
B± W
, B
II2 11
10
II2 2 1
GR(
*4 A/T)B±W
B±W
B±O
GR
* 1 : CALIFORNIA
* 4 : TMC MADE
* 3 : W/ ENGINE IMMOBILISER SYSTEM6
B± O
GR
B±W(
A/T)(
M/T)
(
*5)
(
*4)
(
*5 A/T)C 7
CLUTCH START
SW
(
A/T)
A 8B±W
* 2 : W/ TRACTION CONTROLC 10TXCT
L±Y
C 5RXCK
R±L
C 4CODE
G±W
TO TRANSPONDER
KEY AMPLIFIER
(
*3)
(
*3)
(
*3)
6
(
*1)
(
*2)
(
*2)
(
*2)
(
*2)
(
*2)(
A/T)
B C
B±O(
*5 M/T) GR(
*4 M/T)
B B
NSW A 9ID1 1
VV
ID1 10
B±Y
2 1VSV (
VAPOR
PRESSURE SENSOR) V 7
B± Y
J27
JUNCTION
CONNECTORB A, J28
TPC
* 5 : TMMK MADE

I 2
I 2 I 2
I 2 I 21 2
1 2D 3
D 18 D23 D2D13 D14 A17 E 22D 9
1 II1 2
13 213 1 3 1
3 1 A
2312 34 2 4 2 2 B±Y
BR(
*1) BR
BR Y BR E2 VTA1 VC THG THW PTNKEGLSPS RSO RSC HTS OXS HAFR
B±LW± G
P BR
YY
BR BR
G±B G±Y YL BR BR
Y
R±W
Y±B
P±B
B
B± R(
*1)
BR(
*1)BBR BRB±Y B±Y
B±Y
(
SHIELDED)
(
SHIELDED)(
SHIELDED) Y
A
IDLE AIR CONTROL VALVE
HEATED OXYGEN SENSOR
(
BANK 1 SENSOR 2)
AIR FUEL RATIO SENSOR
(
BANK 1 SENSOR 1) I 1
H 8
A28
JUNCTION
CONNECTOR J20
T 2
THROTTLE POSITION SENSOR
EGR GAS TEMP. SENSOR
ENGINE COOLANT TEMP. SENSOR
VAPOR PRESSURE SENSOREGR VAL VE
POSITION SENSOR
POWER STEERING
OIL PRESSURE SWE 1
E 5
V 1E 2
P 2
ENGINE CONTROL MODULEB E 7 E 8ACE 9 DE10+B E1
HT OX
PTNK
E2 VCC
E2 VTA VC BRI 2ID1 6IG34II2 1 C 16
6
IND
P
R±Y R±Y R±Y
G± W G±W
E 29
FROM FAN NO. 1 RELAYCF
IMLD , , , EE1 1 , B B
B JUNCTION
CONNECTOR J2 4
B(
*1)
THEFT
DETERRENT
ECU T 3 BR B(
*1)
AFR± AFR+
B D
B D
B J10
JUNCTION
CONNECTOR E 16 E15 B9B8D11 D20
G(
*1 *4)
BR(
*1 *5)
R(
*1 *4)
B±R(
*1 *5)
B(
*1) B±Y
D 12 D4 I 2 BR
I 2
I 2 42
31A
OX HTBR
B
Y±RBR
B±Y (
SHIELDED)
(
*6)(
*6)
(
*6)
(
*6) (
*6) (
*6)
OXL1 HTLE1 +B
HEATED OXYGEN SENSOR
(
BANK 2 SENSOR 1) H 4
(
SHIELDED)BR(
*6)
BR(
*6)BR(
*6) BR(
*6)
II13
ID15 II1 4ID12
BRBR
YBR(
*6)
* 1 : CALIFORNIA
* 4 : TMC MADE
* 5 : TMMK MADE
* 6 : EXCEPT CALIFORNIA
(
*1)

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