instrument panel TOYOTA CAMRY 1999 Service Manual PDF

FI3605
Flashing
ON
OFF
0.13 Seconds
± DIAGNOSTICSENGINE (1MZ±FE)
DI±201
436 Author: Date:
(a) Check the DTC.
(1) Initial conditions.

Battery positive voltage 11 V or more

Throttle valve fully closed

Transmission in ºPº or ºNº position

Air conditioning switched OFF
(2) Turn ignition switch OFF.
(3) Prepare the TOYOTA hand±held tester.
(4) Connect the TOYOTA hand±held tester to the
DLC3 at the lower center of the instrument panel.
(5) Turn the ignition switch ON and push the TOYOTA
hand±held tester switch ON.
(6) Switch the TOYOTA hand±held tester normal mode
to check mode (Check that the MIL flashes.).
NOTICE:
If the TOYOTA hand±held tester switches the ECM from
normal mode to check mode or vice±versa, or if the igni-
tion switch is turned from ON to ACC or OFF during check
mode, the DTC and freezed frame data will be erased.
(7) Start the engine (The MIL goes out after the engine
start.).
(8) Simulate the conditions of the malfunction de-
scribed by the customer.
NOTICE:
Leave the ignition switch ON until you have checked the
DTC, etc.
(9) After simulating the malfunction conditions, use the
TOYOTA hand±held tester diagnosis selector to
check the DTC and freezed frame data, etc.
HINT:
Take care not to turn the ignition switch OFF. Turning the ignition
switch OFF switches the diagnosis system from check mode to
normal mode. So all DTC, etc. are erased.
(10) After checking the DTC, inspect the applicable cir-
cuit.

A03319
Instrument
Panel J/B
Engine
Room
J/B
N0.2
BatteryFL
MAINB±GB±R B±R
B±R
W±RJ18
Junction
Connector
B±R
B±R
B±R
B±R
B±R
B±R2
2
2
2
2
21
1
1
1
1
1L
R
Y
W
R±L
GE10
Ignition
Switch
No. 1
No. 2
No. 3
No. 4
No. 5
No. 6
Injector
BR
BR
EC
II3
5
6
21
311
2
3
4#10
#20
#30
#40
#50
#60
E01
E02ECM
12
2L
2A
AM2
4
1
B
F4F6 11 6
7
1K 1K 1C
1B 38
55
W±RE10
E11
E11
E11
E11
E11
E11 Fusible
Link
Block
± DIAGNOSTICSENGINE (1MZ±FE)
DI±277
512 Author: Date:
HINT:
When the 2 or more codes for a misfiring cylinder are recorded repeatedly but no Random Misfire code is
recorded, it indicates that the misfires were detected and recorded at different times.
WIRING DIAGRAM
CONFIRMATION DRIVING PATTERN
(1) Connect the TOYOTA hand±held tester or OBD II scan tool.
(2) Record DTC and the freeze frame data.
(3) Use the TOYOTA hand±held tester to set to Check Mode. (See page DI±197)
(4) Drive the vehicle several times with the engine speed, load and its surrounding range shown with
ENGINE SPD, CALC LOAD in the freeze frame data or MISFIRE RPM, MISFIRE LOAD in the data list.
If you have no TOYOTA hand±held tester, turn the ignition switch OFF after the symptom is simulated
the first time. Then repeat the simulation process again.
HINT:
In order to memorize DTC of misfire, it is necessary to drive around MISFIRE RPM, MISFIRE LOAD in the
data list for the following period of time.
Engine SpeedTime
Idling3 minutes 30 seconds or more
1000 rpm3 minutes or more
2000 rpm1 minute 30 seconds or more
3000 rpm1 minute or more
(5) Check whether there is misfire or not by monitoring DTC and the freeze frame data. After that, record
them.
(6) Turn ignition switch OFF and wait at least 5 seconds.

S05723
J18
Junction
Connector
A
A A A AII3B±R
B±R B±R W±R128 3
1K 1C
Ignition
Switch
76
1K
1BB±R
G
B±R
B±R Y
LIgnition Coil
Spark Plug
No.1
No.2
No.3
11
12
2
2
ED
BR
3 2 1
10
9
7
6
5
4
W±R LG±B
BR±Y
IgniterECM
IGT1
IGT2
IGT3
IGF5 VInstrument
Panel J/B
E1125
E1113
E1112
E1111GR
B±R
5
5
W±R
Engine Room J/B
2L4
AM2
2A1
B
Fusible
Link
Block 1
1
F6
B±GFL
MAIN
Battery
F4
Instrument
Panel J/B
DI±352
± DIAGNOSTICSENGINE (1MZ±FE)
587 Author: Date:
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Read freeze frame data using TOYOTA hand±held tester or OBD II scan tool. Because freeze frame records
the engine conditions when the malfunction is detected, when troubleshooting it is useful for determining
whether the vehicle was running or stopped, the engine warmed up or not, the air±fuel ratio lean or rich, etc.
at the time of the malfunction.
1 Check spark plug and spark of misfiring cylinder (See page DI±276).
NG Go to step 4.
OK

A07449
Fusible
Link
Block
FL
MAINStop Light Switch
B±G1B 1CSTOP
WG±WLight
Failure
Sensor 7
2
To Stop Light Instrument Panel J/B
Instrument Panel J/B
E7 15
G±W
1S 1R
1R1
2
F9
F4
BatteryECM
STP
E1 B±R
ALT
G±WA
C
J27Junction
Connector
J2845
2
G±W7 4
1
1
± DIAGNOSTICSENGINE (1MZ±FE)
DI±363
598 Author: Date:
DTC P1520 Stop Light Switch Signal Malfunction
(Only for A/T)
CIRCUIT DESCRIPTION
This signal is used to detect when the brakes have been applied. The STP signal voltage is the same as
the voltage supplied to the stop lights.
The STP signal is used mainly to control the fuel cut±off engine speed (The fuel cut±off engine speed is re-
duced slightly when the vehicle is braking.).
DTC No.DTC Detecting ConditionTrouble Area
P1520
Stop light switch does not turn off when repeating the driving at
30 km or more 10 times or more after depressing brake
(2 trip detection logic)
Short in stop light switch signal circuit

Stop light switch

ECM
WIRING DIAGRAM
DI088±06

A07450
Ignition SwitchW±R B±RInstrument Panel J/B
FL
MAINFusible
Link
Block
BatteryJunction
ConnectorECM
B±R
W±R
BR
BR
W±B
B±Y
B
6
7
2 4
17
2 5
4
1 1B
AA F4 F6 E10E7
2F 2K 2J
2L
2AEFI EFI
RelayEngine Room
J/B+B
E1 17 16
AM2
EB EC
J28
3
1E72
MREL
E78IGSW
J27
1W
1B7
5 IGN
1K3
1K5
B+ B
B±Y
B±W
B±W
J35 J35
C
C
Junction
Connector
B±GJ22
Junction
Connector
± DIAGNOSTICSENGINE (1MZ±FE)
DI±369
604 Author: Date:
ECM Power Source Circuit
CIRCUIT INSPECTION
When the ignition switch is turned on, battery positive voltage is applied to terminal IGSW of the ECM and
the EFI main relay (Marking: EFI) control circuit in the ECM sends a signal to terminal MREL of the ECM
switching on the EFI main relay.
This signal causes current to flow to the coil, closing the contacts of the EFI, main relay and supplying power
to terminals +B of the ECM.
If the ignition switch is turned off, the ECM continues to switch on the EFI main relay for a maximum of 2
seconds for the initial setting of the IAC valve.
WIRING DIAGRAM
DI4DU±01

S04164
IGN Fuse
Instrument Panel J/B
± DIAGNOSTICSENGINE (1MZ±FE)
DI±371
606 Author: Date:
4 Check EFI fuse.
PREPARATION:
Remove IGN fuse from instrument panel J/B.
CHECK:
Check continuity of IGN fuse.
OK:
Continuity
NG Check for short in all the harness and compo-
nents connected to IGN fuse
(See attached wiring diagram).
OK
5 Check ignition switch (See page BE±13).
NG Replace ignition switch.
OK
Check and repair harness and connector be-
tween battery and ignition switch, and igni-
tion switch and ECM.

A07451
ECM
E01 FC 3
E7
G±R
5EB1
G±R 1
1
1 1 15
3
2
CIR OPN Relay
Engine Room R/B
L±B
EB1
ID1L±B
A
A
5 4 10
7
W±B
W±BJ11
Junction
Connector
IG BL
StarterS2
B±R
EB
B±R 2D
2K 2F
9 5 4 2C 10
II2
10
Junction
Connector
J8 J7
C B(A/T)
(A/T) GR
(M/T) B±WPark/
Nutral
Position
Switch
6 5(A/T)
B±W(A/T)
B±WII2
11 11
ST Relay
B B
B EFI Relay23
15
2
13 5
2J 2K
W±BB±R W±B B±RB±W
7 8R1K
W±R
1J
43
1B
STARTER
5 5
1
2 B±W
W±B
2A
2B31
2L 4 AM27Instrument Panel J/B
Battery
B±GFL
MAIN F6
F4 1
Fusible
Link
BlockB B
EFI
MAINB+
MREL
8
E7
B±R
Fuel
Pump
1W 1K1
IGN
1
ST2
IG2
AM2Clutch
Start
Switch
L±BW±B
Junction
Connector
A
J40
Junction
Connector
1K 7
*B±O *1GR
(M/T)
*B±O *1GR
J35 J35C
*B±O *1GR
B±W
B±R
Junction
Connector J26
1
7
3
1K
*: TMMK made
*
1: TMC made
± DIAGNOSTICSENGINE (1MZ±FE)
DI±375
610 Author: Date:
WIRING DIAGRAM

A00307
ON
VSV is ON VSV is OFF
Air Filter Air
Air
E
FE
F
BE6653
FI7073 FI7074
Air Filter
± DIAGNOSTICSENGINE (1MZ±FE)
DI±381
616 Author: Date:
INSPECTION PROCEDURE
TOYOTA hand±held tester
1 Connect TOYOTA hand±held tester and check operation of VSV for ACIS.
PREPARATION:
(a) Remove the fuse cover on the instrument panel.
(b) Connect the TOYOTA hand±held tester to the DLC3.
(c) Turn the ignition switch ON and push the TOYOTA hand±
held tester main switch ON.
(d) Select the ACTIVE TEST mode on the TOYOTA hand±
held tester.
CHECK:
Check operation of VSV when VSV is operated by the TOYOTA
hand±held tester.
OK:
VSV is ON:
Air from pipe E is flowing out through pipe F.
VSV is OFF:
Air from pipe E is flowing out through the air filter.
OK Check for vacuum tank (See page SF±51).
NG
2 Check VSV for ACIS (See page SF±60).
NG Replace VSV for ACIS.
OK

A07453
5
1B±R
1ECM Engine Room J/B
E77
STA
E1 S2
Starter W±B 9 5
2D
2K 3
2
Sarter Relay MAIN
2B3
2J 11 B
J7
J7 J8
Junction
Connector CB
B II210 From Battery
W±B
W±B
A
A J11
Junction
Connector
IG Instrument
Panel J/B
STARTER
From Ignition Switch11
II2
B±W(A/T)
B±W(A/T)
B±W
Park/Neutral
Position Switch 6
5
B±W(A/T)
B
B
B
1J
1K 3
4
B±W(M/T)
12
Clutch Start Switch
GR
*1GR1
*1B±O
*GR
*GR
*GR
*B±O(M/T)
J16
Junction
Connector
*B±O
*: TMMK made
*
1: TMC made
*1B±O
DI±384
± DIAGNOSTICSENGINE (1MZ±FE)
619 Author: Date:

Starter Signal Circuit
CIRCUIT DESCRIPTION
When the engine is cranked, the intake air flow is slow, so fuel vaporization is poor. A rich mixture is therefore
necessary in order to achieve good startability. While the engine is being cranked, the battery positive volt-
age is applied to terminal STA of the ECM. The starter signal is mainly used to increase the fuel injection
volume for the starting injection control and after±start injection control.
WIRING DIAGRAM
DI08B±06

DI02W±02
FI0534
S05335
TOYOTA hand±held tester
DLC3
± DIAGNOSTICSAUTOMATIC TRANSAXLE (A140E)
DI±389
624 Author: Date:
PRE±CHECK
1. DIAGNOSIS SYSTEM
(a) Description

When troubleshooting OBD II vehicles, the only dif-
ference from the usual troubleshooting procedure
is that you connect an OBD II scan tool complying
with SAE J1987 or TOYOTA hand±held tester to the
vehicle, and read off various data output from the
vehicle's ECM.
OBD II regulations require that the vehicle's on±
board computer lights up the Malfunction Indicator
Lamp (MIL) on the instrument panel when the com-
puter detects a malfunction in the computer itself or
in drive system components which affect vehicle
emissions. In addition to the MIL lighting up when
a malfunction is detected, the applicable DTCs pre-
scribed by SAE J2012 are recorded in the ECM
memory (See page DI±16).
If the malfunction only occurs in 3 trips, the MIL goes
off but the DTCs remain recorded in the ECM
memory.

To check the DTCs, connect an OBD II scan tool or
TOYOTA hand±held tester to DLC3 on the vehicle.
The OBD II scan tool or TOYOTA hand±held tester
also enables you to erase the DTCs and check
freeze frame data and various forms of engine data
(For instruction book).
DTCs include SAE controlled codes and Manufac-
turer controlled codes.
SAE controlled codes must be set as the codes pre-
scribed by the SAE, while Manufacturer controlled
codes can be set freely by the manufacturer within
the prescribed limits.
(See DTC chart on page DI±401)