wiring TOYOTA CAMRY 1999 Service Manual PDF

DI±290
± DIAGNOSTICSENGINE (1MZ±FE)
525 Author: Date:
DTC P0340 Camshaft Position Sensor Circuit
Malfunction
CIRCUIT DESCRIPTION
Camshaft position sensor (G22 signal) consist of a signal plate and pickup coil.
The G22 signal plate has one tooth, on its outer circumference and is mounted on the left bank camshafts.
When the camshafts rotate, the protrusion on the signal plate and the air gap on the pickup coil change,
causing fluctuations in the magnetic field and generating an electromotive force in the pickup coil.
The NE signal plate has 34 teeth and is mounted on the crankshaft. The NE signal sensor generates 34
signals for every engine revolution. The ECM detects the standard crankshaft angle based on the G22 signal
and the actual crankshaft angle and the engine speed by the NE signals.
DTC No.DTC Detecting ConditionTrouble Area
P0340
No camshaft position sensor signal to ECM during cranking
(2 trip detection logic)
Open or short in camshaft position sensor circuit

Camshaft position sensor
P0340No camshaft position sensor signal to ECM with engine speed
600 rpm or more

Camshaft osition sensor

Starter

ECM
WIRING DIAGRAM
Refer to DTC P0335 (Crankshaft Position Sensor ºAº Circuit Malfunction) on page DI±287 .
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 resistance of camshaft position sensor (See page IG±1).
Reference INSPECTION USING OSCILLOSCOPE
Refer to DTC P0335 on page DI±287.
NG Replace camshaft position sensor.
OK
DI07V±06

A07446
J20
Junction
Connector
EFI Relay
2K2J
2C
BB±YJ27 J28
W±B
EB
9B±Y Y±G
AA1218
13 1
2
G±Y
BRECM
EGR
E01
EGLS5 V
E2 32
VC
5 V
THG
E7
2
1W±GY
BR18
8
MREL
B+ BR
EGR Gas Temp. Sensor
E10 E10
22
E11 E10E11
Engine Room J/B
2A2
7 1
53
1 5
EFI
VSV
for EGR
B±Y
Junction
Connector
B
2
B±Y
J35
J35C
C Junction
ConnectorB±W
B±W
B±W
EGR Valve
Position Sensor
II3From
FL MAIN
S06906
Vehicle Speed
70 ~ 90 km/h
(43 ~ 56 mph)
Idling
IG SW OFF(1)(2)(3)
(4)(5)
Warmed up 3 ~ 5 min. 3 min. 3 ~ 5 min. 2 min.Time
± DIAGNOSTICSENGINE (1MZ±FE)
DI±293
528 Author: Date:
WIRING DIAGRAM
SYSTEM CHECK DRIVING PATTERN

DI±302
± DIAGNOSTICSENGINE (1MZ±FE)
537 Author: Date:
DTC P0402 Exhaust Gas Recirculation Flow
Excessive Detected (Ex CA Spec.)
CIRCUIT DESCRIPTION
Refer to DTC P0401 (Exhaust Gas Recirculation Flow Insufficient Detected) on page DI±292.
DTC No.DTC Detecting ConditionTrouble Area
P0402
When EGR cut±off, lift amount of EGR valve is
2.6 mm (0.1 in.) or more
(2 trip detection logic)

EGR valve stuck open

VSV for EGR open malfunction

Short in VSV circuit for EGR

Open or short in EGR valve position sensor circuit

EGR valve position sensor

ECM
See DTC P0401 (Exhaust Gas Recirculation Flow Insufficient Detected) on See page DI±292 for SYS-
TEM CHECK DRIVING PATTERN and 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.
TOYOTA hand±held tester
1 Check connection and blockage of vacuum hose.
NG Repair or replace vacuum hose.
OK
2 Check VSV for EGR (See page DI±292, step 5).
OK Go to step 4.
NG
DI07X±06

A07447
Vapor Pressure Sensor
2J2
9J23
B±Y
V
VSV for EVAP
LG
AA
2
1ECM
5V
VC
PTNK
E1
E2
EVP1
E01
E01
TPC
3
2
Engine Rom J/B
MREL VSV for Vapor
Pressure Sensor
II3
EB
B±W
W±BL±R Y
1BRE10
E7
E10
E72
17
18
7
9
E78
EFI Relay
IA1 L±RY Y
ID1 II13
5
1
II1 BR
BR
ID1 E10
B±Y
J28 J27
B
ID1 10
1
2
ID12 2A
7 1
2C5
2K 53
2
1 EFI
B±WFL MAIN
From
24
B+
J28E B±YB
B±Y
B±Y
V
J35
J35C
C Junction
Connector
Junction
ConnectorJunction
Connector DI±312
± DIAGNOSTICSENGINE (1MZ±FE)
547 Author: Date:
WIRING DIAGRAM
INSPECTION PROCEDURE

If DTCs P0441, P0446, P0450 or P0451 is output after DTC P0440, first troubleshoot DTCs P0441,
P0446, P0450 or P0451. If no malfunction is detected, troubleshoot DTC P0440 next.

Ask the customer whether, after the MIL came on, the customer found the fuel tank cap loose and tight-
ened it. Also ask the customer whether the fuel tank cap was loose when refuelling. If the fuel tank cap
was not loose, it was the cause of the DTC. If the fuel tank cap was not loose or if the customer was
not sure if it was loose, troubleshoot according to the following procedure.

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.

When the ENGINE RUN TIME in the freeze frame data is less than 200 seconds, carefully check the
VSV for EVAP, charcoal canister and vapor pressure sensor.

± DIAGNOSTICSENGINE (1MZ±FE)
DI±319
554 Author: Date:
DTC No.DTC Detecting ConditionTrouble Area
Pressure in charcoal canister does not drop during purge con-
trol (2 trip detection logic)
P0441During purge cut±off, pressure in charcoal canister is very low
compared with atmospheric pressure
(2 trip detection logic)
Open or short in VSV circuit for EVAP

Open or short in VSV circuit for vapor pressure sensor


Open or short in vaporpressure sensor circuit
When VSV for vapor pressure sensor is OFF, ECM judges that
there is no continuity between vapor pressure sensor and
charcoal canister (2 trip detection logic)

Open or short in vapor pressure sensor circuit

VSV for EVAP

VSV for vapor pressure sensor

Vapor pressure sensor
P0446
When VSV for vapor pressure sensor is ON, ECM judges that
there is no continuity between vapor pressure sensor and fuel
tank (2 trip detection logic)
Va o r ressure sensor

Vacuum hose cracks, holed blocked, damaged or
disconnected ((1), (4), (5),(6) and (7) in fig. 1)

Charcoal canister cracks, holed or damaged
F l t k fill h k l k d d dAfter purge cut off operates, pressure in charcoal canister is
maintained at atmospheric pressure
(2 trip detection logic)
Fuel tank over fill check valve cracked or damaged
WIRING DIAGRAM
Refer to DTC P0440 (Evaporative Emission Control System Malfunction) on page DI±311 for the WIRING
DIAGRAM.
INSPECTION PROCEDURE
HINT:

If DTCs P0441, P0446, P0450 or P0451 is output after DTC P0440, first troubleshoot DTCs P0441,
P0446, P0450 or P0451. If no malfunction is detected, troubleshoot DTC P0440 next.

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.

When the ENGINE RUN TIME in the freeze frame data is less than 200 seconds, carefully check the
VSV for EVAP, charcoal canister and vapor pressure sensor.
TOYOTA hand±held tester
1 Check VSV connector for EVAP, VSV connector for vapor pressure sensor and
vapor pressure sensor connector for looseness and disconnection.
NG Repair or connect VSV or sensor connector.
OK

DI±332
± DIAGNOSTICSENGINE (1MZ±FE)
567 Author: Date:
WIRING DIAGRAM
Refer to DTC P0440 (Evaporative Emission Control Malfunction) on page DI±311.
INSPECTION PROCEDURE
HINT:

If DTCs P0441, P0446, P0450 or P0451 is output after DTC P0440, first troubleshoot DTCs P0441,
P0446 ,P0450 or P0451. If no malfunction is detected, troubleshoot DTC P0440 next.

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.

When the ENGINE RUN TIME in the freeze frame data is less than 200 seconds, carefully check the
VSV for EVAP, charcoal canister and vapor pressure sensor.
1 Check voltage between terminals VC and E2 of ECM connector
(See page DI±311, step 9).
NG Check and replace ECM (See page IN±31).
OK
2 Check voltage between terminals PTNK and E2 of ECM connectors
(See page DI±311, step 10).
OK Check and replace ECM (See page IN±31).
NG
3 Check for open and short in harness and connector between vapor pressure
sensor and ECM (See page IN±31).
NG Repair or replace harness or connector.
OK
Replace vapor pressure sensor.

A00223
Vehicle Speed
Sensor
Combination
Meter
ECM
Transaxle4±Pulse 4±Pulse
Vehicle Speed Sensor
Q00515 Q00514
A03316
Combination
MeterJ15
Junction
Connector
14
C93
V±W V±W V±WECM
SPD5V
BBE8 22
IG3
± DIAGNOSTICSENGINE (1MZ±FE)
DI±333
568 Author: Date:
DTC P0500 Vehicle Speed Sensor Malfunction
CIRCUIT DESCRIPTION
The vehicle speed sensor outputs a 4±pulse signal for every revolution of the rotor shaft, which is rotated
by the transmission output shaft via the driven gear. After this signal is converted into a more precise rectan-
gular waveform by the waveform shaping circuit inside the combination meter, it is then transmitted to the
ECM. The ECM determines the vehicle speed based on the frequency of these pulse signals.


DTC No.DTC Detecting ConditionTrouble Area
P0500
No vehicle speed sensor signal to ECM under conditions (a)
and (b):
(2 trip detection logic)
(a) Park/neutral position switch is OFF
(b) Vehicle is being driven
Open or short in vehicle speed sensor circuit

Vehicle speed sensor

Combination meter

ECM
WIRING DIAGRAM
DI082±06

P01559
Throttle Valve
From
Air
Cleaner
Signal
ECM
ValveIAC Valve
To Cylinders Intake Air Chamber
A07448
From
BatteryFL
MAIN
EC
F4 F611Fusible
Link
Block
B1
7 2
5EFI Engine Room J/B
EFI Relay1
23
5 2A
2K 2J
2C W±BIAC Valve
J27J28
B±Y
9II3
21
3E1116
15ECM
RSO
E01
RSC
E01 AA
B±W
MREL
B+ E11
E78
B±G
BB±YB±Y
J36
J35 AC J16
Junction
Connector
B±YR±W
Y±B
B±W
Junction
ConnectorB
Junction
Connector B DI±336
± DIAGNOSTICSENGINE (1MZ±FE)
571 Author: Date:
DTC P0505 Idle Control System Malfunction
CIRCUIT DESCRIPTION
The rotary solenoid type IAC valve is located in front of the in-
take air chamber and intake air bypassing the throttle valve is
directed to the IAC valve through a passage.
In this way the intake air volume bypassing the throttle valve is
regulated, controlling the engine speed.
The ECM operates only the IAC valve to perform idle±up and
provide feedback for the target idling speed.
DTC No.DTC Detecting ConditionTrouble Area
P0505Idle speed continues to vary greatly from target speed
(2 trip detection logic)

IAC valve is stuck or closed

Open or short in IAC valve circuit

Open or short in A/C signal circuit

Air intake (hose loose)

ECM
WIRING DIAGRAM
DI083±06

DI±340
± DIAGNOSTICSENGINE (1MZ±FE)
575 Author: Date:
DTC P1130 A/F Sensor Circuit Range/Performance Mal-
function (Only for California Spec.)
DTC P1150 A/F Sensor Circuit Range/Performance Mal-
function (Only for California Spec.)
CIRCUIT DESCRIPTION
Refer to DTC P0125 (Insufficient Temp. for Closed Loop Fuel Control (Only for California Spec.)) on Page
DI±249.
DTC No.DTC Detecting ConditionTrouble Area
Voltage output* of A/F sensor remains at 3.8 V or more, or
2.8 V or less, during engine running after engine is warmed
up (2 trip detection logic)
*: Output value changes at inside of ECM only.
P1130
P1150Voltage output* of A/F sensor does not change from 3.30 V,
during engine running after engine is warmed up
(2 trip detection logic)
*: Output value changes at inside of ECM only.
Open or short in A/F sensor (bank 1, 2 sensor 1) circuit

A/F sensor (bank 1, 2 sensor 1)

ECM
Open or short in A/F sensor circuit
(2 trip detection logic)
HINT:

After confirming DTC P1130 or P01150, use the OBD II scan tool or TOYOTA hand±held tester to con-
firm voltage output of A/F sensor (AFS B1 S1/O2S B1 S1) from ºCURRENT DATAº.

The A/F sensor's output voltage and the short±term fuel value can be read using the OBD II scan tool
or TOYOTA hand±held tester.

The ECM controls the voltage of AFR/AFL
and AFR/AFL terminals of ECM to the fixed voltage.
Therefore, it is impossible to confirm the A/F sensor output voltage without OBD II scan tool or TOYOTA
hand±held tester.

OBD II scan tool (excluding TOYOTA hand±held tester) displays the one fifth of the A/F sensor output
voltage which is displayed on the TOYOTA hand±held tester.
WIRING DIAGRAM
Refer to DTC P0125 (Insufficient Coolant Temp. for Closed Loop Fuel Control (Only for California Spec.))
on page DI±249.
DI1K6±03

A02509
HAFL (+)
HAFR (+)
± DIAGNOSTICSENGINE (1MZ±FE)
DI±349
584 Author: Date:
DTC P1135 A/F Sensor Heater Circuit Malfunction
(Bank 1 Sensor 1) (Only for California Spec.)
DTC P1155 A/F Sensor Heater Circuit Malfunction
(Bank 2 Sensor 1) (Only for California Spec.)
CIRCUIT DESCRIPTION
Refer to DTC P0125 (Insufficient Coolant Temp. for Closed Loop Fuel Control (Only for California Spec.))
on page DI±249.
DTC No.DTC Detecting ConditionTrouble Area
P1135
When heater operates, heater current exceeds 8 A
(2 trip detection logic)
Open or in heater circuit of A/F sensors
(bank 1, 2 sensor 1)P1135
P1155Heater current of 0.25 A or less when heater operates
(2 trip detection logic)
(bank 1, 2 sensor 1)

A/F sensors (bank 1, 2 sensor 1) heater

ECM
WIRING DIAGRAM
Refer to DTC P0125 (Insufficient Coolant Temp. for Closed Loop Fuel Control (Only for California Spec.))
on page DI±249.
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 voltage between terminal HAFR, HAFL of ECM connector and body
ground.
PREPARATION:
(a) Remove glove compartment (See page SF±73).
(b) Turn the ignition switch ON.
CHECK:
Measure voltage between terminals HAFR, HAFL of the ECM
connector and body ground.
OK:
Voltage: 9 ~ 14 V
OK Check and replace ECM (See page IN±31).
NG
DI1K8±04