1999 TOYOTA CAMRY light

DI±18
± DIAGNOSTICSENGINE (5S±FE)
253 Author: Date:
DTC No.
(See Page)Detection ItemTrouble AreaMIL*1Memory
P0340
(DI±103)Camshaft Position Sensor
Circuit Malfunction
Open or short in camshaft position sensor circuit
Camshaft position sensor
Distributor
Starter
ECM

P0401
(DI±105)Exhaust Gas Recirculation
Flow Insufficient Detected
EGR valve stuck closed
Open or short in VSV circuit for EGR
Vacuum or EGR hose disconnected
Manifold absolute pressure sensor
EGR VSV open or close malfunction
ECM

P0402
(DI±113)Exhaust Gas Recirculation
Flow Excessive Detected
EGR valve stuck open
Vacuum or EGR hose is connected to wrong post
Manifold absolute pressure sensor
ECM

*2
P0420
(DI±116)
Catalyst System Efficiency
Below Threshold
(Except California Spec.)Three±way catalytic converter
Open or short in heated oxygen sensor circuit
Heated oxygen sensor

*3
P0420
(DI±119)
Catalyst System Efficiency
Below Threshold
(Only for California Spec.)
Three±way catalystic converter
Open short in heated oxygen sensor (bank 1 sensor 2) circuit
Heated oxygen sensor (bank 1 sensor 2)
Open or short in A/F sensor circuit
A/F sensor

P0440
(DI±122)Evaporative Emission Control
System Malfunction
Vapor pressure sensor
Fuel tank cap incorrectly installed
Fuel tank cap cracked or damaged
Vacuum hose cracked, holed, blocked, damaged or
disconnected ((1) or (2) in fig. 1)
Hose or tube cracked, holed, damaged or loose seal
((3) in fig. 1)
Fuel tank cracked, holed or damaged
Charcoal canister cracked, holed or damaged
Fuel tank over fill check valve cracked or damaged

P0441
(DI±129)Evaporative Emission Control
System Incorrect Purge Flow
Open or short in VSV circuit for vapor pressure sensor
VSV for vapor pressure sensor
Open or short in vapor pressure sensor circuit
Vapor pressure sensor
O h t i VSV i it f EVAP

P0446
(DI±129)Evaporative Emission Control
System Vent Control
Malfunction
Open or short in VSV circuit for EVAP
VSV for EVAP
Vacuum hose cracks, hole, blocked, damaged or disconnected
((1), (4), (5) holed (6) and (7) in fig. 1)
Charcoal canister cracked, holed or damaged
Fuel tank over fill check valve cracked or damaged

P0450
(DI±142)Evaporative Emission Control
System Pressure Sensor
Malfunction
Open or short in vapor pressure sensor circuit
V

P0451
(DI±142)Evaporative Emission Control
System Pressure Sensor
(Range/performance)Vapor pressure sensor
ECM

*1: 


MIL lights up
*
2: Except California Specification vehicles
*
3: Only for California Specification vehicles

± DIAGNOSTICSENGINE (5S±FE)
DI±19
254 Author: Date:
DTC No.
(See Page)Detection ItemTrouble AreaMIL*1Memory
P0500
(DI±145)Vehicle Speed Sensor
Malfunction
Combination meter
Open or short in No.1 vehicle speed sensor circuit
No.1 vehicle speed sensor
ECM

P0505
(DI±148)Idle Control System
Malfunction
IAC valve is stuck or closed
Open or short in IAC valve circuit
Open or short in A/C switch circuit
Air intake (hose loose)
ECM

*1: 


MIL lights up
2. MANUFACTURER CONTROLLED
DTC No.
(See Page)Detection ItemTrouble AreaMIL*1Memory
*2
P1130
(DI±152)A/F Sensor Circuit
Range/Performance MalfunctionOpen or short in A/F sensor circuit
A/F sensor
ECM

*2
P1133
(DI±157)A/F Sensor Circuit Response
MalfunctionA/F sensor
*2
P1135
(DI±161)A/F Sensor Heater Circuit
MalfunctionOpen or short in heater circuit of A/F sensor
A/F sensor heater
ECM

P1300
(DI±163)Igniter Circuit Malfunction (No.1)
Open or short in IGF or IGT circuit from igniter to ECM
Ignition coil (No.1)
ECM

P1310
(DI±163)Igniter Circuit Malfunction (No.2)
Open or short in IGF or IGT circuit from igniter to ECM
Ignition coil (No.2)
ECM

P1335
(DI±169)Crankshaft Position Sensor Cir-
cuit Malfunction
(During engine running)Open short in crankshaft position sensor circuit
Crankshaft position sensor
ECM
±
*3
P1520
(DI±170)Stop Light Switch Signal Mal-
functionShort in stop light switch signal circuit
Stop light switch
ECM

P1600
(DI±173)ECM BATT MalfunctionOpen in back up power source circuit
ECM
*3
P1780
(DI±175)Park/Neutral Position Switch
MalfunctionShort in park/neutral position switch circuit
Park/neutral position switch
ECM

*1: 


MIL lights up
*
2: Only for California Specification vehicles
*
3: Only for A/T models

DI±20
± DIAGNOSTICSENGINE (5S±FE)
255 Author: Date:
DTC No.
(See Page)Detection ItemTrouble AreaMIL*1Memory
*2
B2795
(DI±928)Unmatched key CodeImmobiliser system±
*2
B2796
(DI±929)No Communnication in
Immobiliser systemImmobiliser system±
*2
B2797
(DI±932)Communication Malfunction No.1Immobiliser system±
*2
B2798
(DI±935)Communication Malfunction No.2Immobiliser system±
*1: ±


MIL does not light up
*2: Only for w/ engine immobiliser system models

DI±24
± DIAGNOSTICSENGINE (5S±FE)
259 Author: Date:
Symbols (Terminals No.)Wiring ColorConditionSTD Voltage (V)
*1GBR
IdlingBelow 3.01
HTAF (E9 ± 2) ± E04 (E9 ± 15)G e BR
IG switch ON9 ~ 14
LOCK IN (E9 ± 18)
± E1 (E9 ± 14)W ± L e BRA/C compressor is operatingPulse generation
(See page DI±190)
LOCK (E7 15) E1(E9 14)RWBRA/C indicator light lights upBelow 4.0LOCK (E7 ± 15) ± E1(E9 ± 14)R ± W e BRA/C indicator light does not lights upBelow 1.0
A/C SW (E7 ± 10)RBBRA/C switch ON9 ~ 14A/C SW (E7 10)
± E1 (E9 ± 14)R ± B e BRA/C switch OFFBelow 1.0
PRS (E7 ± 13) ± E1 (E9 ± 14)G e BRA/C pressure is normallyBelow 1.0
THR (E8 10) E2 (E8 9)LRBRIG switch ON, A/C evaporator temp. 0°C (32°F)2.2 ~ 2.6THR (E8 ± 10) ± E2 (E8 ± 9)L ± R e BRIG switch ON, A/C evaporator temp. 15°C (59°F)1.4 ~ 1.8
MGC (E7 21) E01(E9 14)LYBRA/C magnetic clutch ONBelow 1.0MGC (E7 ± 21) ± E01(E9 ± 14)L ± Y e BRA/C magnetic clutch OFF9 ~ 14
* STP (E7 4) E1 (E9 14)GWBRIG switch ON, Brake pedal depressed7.5 ~ 14* STP (E7 ± 4) ± E1 (E9 ± 14)G ± W e BRIG switch ON, Brake pedal releasedBelow 1.5
ELS (E7 2) E1 (E9 14)BRBRDefogger switch and taillight switch ON7.5 ~ 14ELS (E7 ± 2) ± E1 (E9 ± 14)B ± R e BRDefogger switch and taillight switch OFFBelow 1.5
PSSW (E8 ± 12) BLBRIG switch ON9 ~ 14PSSW (E8 12)
± E1 (E9 ± 14)B ± L e BRAt idling, Turn steering wheel to lock positionBelow 3.0
SIL (E7 ± 16) ± E1 (E9 ± 14)W e BRDuring transmissionPulse generation
*: Only for A/T models
*1: Only for California Specification vehicles

± DIAGNOSTICSENGINE (5S±FE)
DI±27
262 Author: Date:
Symbols (Terminals No.)Wiring ColorConditionSTD Voltage (V)
*1GBR
IdlingBelow 3.01
HTAF (E9 ± 2) ± E04 (E9 ± 15)G e BR
IG switch ON9 ~ 14
LOCK IN (E9 ± 19)
± E1 (E9 ± 24)W ± L e BRA/C compressor is operatingPulse generation
(See page DI±190)
LOCK (E7 ± 20)RWBRA/C indicator light lights upBelow 4.0LOCK (E7 20)
± E1 (E9 ± 24)R ± W e BRA/C indicator light does not lights upBelow 1.0
A/C SW (E7 ± 10)RBBRA/C switch ON9 ~ 14A/C SW (E7 10)
± E1 (E9 ± 24)R ± B e BRA/C switch OFFBelow 1.0
PRS (E7 ± 19) ± E1 (E9 ± 24)G e BRA/C pressure is normallyBelow 1.0
THR (E8 11) E2 (E8 9)LRBRIG switch ON, A/C evaporator temp. 0°C (32°F)2.2 ~ 2.6THR (E8 ± 11) ± E2 (E8 ± 9)L ± R e BRIG switch ON, A/C evaporator temp. 15°C (59°F)1.4 ~ 1.8
MGC (E7 ± 21)LYBRA/C magnetic clutch ONBelow 1.0MGC (E7 21)
± E01 (E9 ± 13)L ± Y e BRA/C magnetic clutch OFF9 ~ 14
* STP (E7 9) E1 (E9 24)GWBRIG switch ON, Brake pedal depressed7.5 ~ 14* STP (E7 ± 9) ± E1 (E9 ± 24)G ± W e BRIG switch ON, Brake pedal releasedBelow 1.5
ELS (E7 13) E1 (E9 24)BRBRDefogger switch and taillight switch ON7.5 ~ 14ELS (E7 ± 13) ± E1 (E9 ± 24)B ± R e BRDefogger switch and taillight switch OFFBelow 1.5
PSSW (E9 ± 4) BLBRIG switch ON9 ~ 14PSSW (E9 4)
± E1 (E9 ± 24)B ± L e BRAt idling, Turn steering wheel to lock positionBelow 3.0
SIL (E7 ± 6) ± E1 (E9 ± 24)W e BRDuring transmissionPulse generation
TACH (E7 ± 7) ± E1 (E9 ± 24)B ± O eBRIdlingPulse generation
KSW (E10 4) E1 (E9 24)LBBRAt the time of inserting keyBelow 1.5KSW (E10 ± 4) ± E1 (E9 ± 24)L ± B e BRIn the condition without key insertedPulse generation
RXCK (E10 ± 3)
± E1 (E9 ± 24)R ± L eBRAt the time of inserting keyPulse generation
CODE (E10 ± 8)
± E1 (E9 ± 24)G ± W eBRAt the time of inserting keyPulse generation
TXCT (E10 ± 1)
± E1 (E9 ± 24)L ± Y eBRAt the time of inserting keyPulse generation
IMLD (E10 ± 1) ± E1 (E9 ± 24)R ± Y eBRIn the condition without key insertedPulse generation
MREL (E10 ± 7)
± E1 (E9 ± 24)B ± W eBRIG switch ON9 ~ 14
IGSW (E7 ± 1) ± E1 (E9 ± 24)B ± ReBRIG switch ON9 ~ 14
*: Only for A/T models
*1: Only for California Specification vehicles

A01666
Vehicle speed
50 ~ 65 km/h
(31 ~ 40 mph)
Idling
IG SW OFF
(1)
1 ~ 3 min.1 min.Time
(2)(3)(4)
(5)
± DIAGNOSTICSENGINE (5S±FE)
DI±67
302 Author: Date:
CONFIRMATION DRIVING PATTERN
(1) Connect the TOYOTA hand±held tester to the DLC3.
(2) Switch the TOYOTA hand±held tester from normal mode to check mode (See page DI±3).
(3) Start the engine and warm it up with all accessory switches OFF.
(4) Drive the vehicle at 50 ~ 65 km/h (31 ~ 40 mph) for 1 ~ 3 min. to warm up the heated oxygen sensor.
(5) Let the engine idle for 1 min.
(6) Perform steps (3) to (5) three times.
HINT:
If a malfunction exists, the MIL will light up during step (6).
NOTICE:
If the conditions in this test are not strictly followed, detection of the malfunction will not be possible.
If you do not have a TOYOTA hand±held tester, turn the ignition switch OFF after performing steps
(3) to (6), then perform steps (3) to (6) again.
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 Are there any other codes (besides DTC P0130) being output?
YES Go to relevant DTC chart.
NO

± DIAGNOSTICSENGINE (5S±FE)
DI±79
314 Author: Date:
DTC P0171 System too Lean (Fuel Trim)
(Only for California Spec.)
DTC P0172 System too Rich (Fuel Trim)
(Only for California Spec.)
CIRCUIT DESCRIPTION
Fuel trim refers to the feedback compensation value compared against the basic injection time. Fuel trim
includes short±term fuel trim and long±term fuel trim.
Short±term fuel trim is the short±term fuel compensation used to maintain the air±fuel ratio at its ideal
theoretical value.
The signal from the A/F sensor is approximately proportional to the existing air±fuel ratio, and ECM compar-
ing it with the ideal theoretical value, the ECM reduces fuel volume immediately if the air±fuel ratio is rich
and increases fuel volume if it is lean.
Long±term fuel trim compensates the deviation from the central value of the short±term fuel trim stored up
by each engine tolerance, and the deviation from the central value due to the passage of time and changes
of using environment.
If both the short±term fuel trim and long±term fuel trim exceed a certain value, it is detected as a malfunction
and the MIL lights up.
DTC No.DTC Detecting ConditionTrouble Area
P0171
When air±fuel ratio feedback is stable after engine warming up,
fuel trim is considerably in error on rich side
(2 trip detection logic)

Gas leakage on exhaust system

Air intake (loose hoses)

Fuel line pressure

Injector blockage

Manifold absolute pressure sensor

Engine coolant temp. sensor

A/F sensor
P0172
When air±fuel ratio feedback is stable after engine warming up,
fuel trim is considerably in error on lean side
(2 trip detection logic)

Gas leakage on exhaust system

Fuel line pressure

Injector leak, blockage

Manifold absolute pressure sensor

Engine coolant temp. sensor

A/F sensor
HINT:

When the DTC P0171 is recorded, the actual air±fuel ratio is on the lean side. When DTC P0172 is
recorded, the actual air±fuel ratio is on the rich side.

If the vehicle runs out of fuel, the air±fuel ratio is lean and DTC P0171 is recorded. The MIL then comes
on.

If the total of the short±term fuel trim value and long±term fuel trim value is within + 38 %, the system
is functioning normally.

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

The ECM controls the voltage of AF
and AF 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.
DI1JW±03

DI±84
± DIAGNOSTICSENGINE (5S±FE)
319 Author: Date:
DTC P0171 System too Lean (Fuel Trim)
(Except California Spec.)
DTC P0172 System too Rich (Fuel Trim)
(Except California Spec.)
CIRCUIT DESCRIPTION
Fuel trim refers to the feedback compensation value compared against the basic injection time. Fuel trim
includes short±term fuel trim and long±term fuel trim.
Short±term fuel trim is the short±term fuel compensation used to maintain the air±fuel ratio at its ideal
theoretical value. The signal from the heated oxygen sensor indicates whether the air±fuel ratio is RICH or
LEAN compared to the ideal theoretical value, triggering a reduction in fuel volume if the air±fuel ratio is rich,
and an increase in fuel volume if it is lean.
Long±term fuel trim is overall fuel compensation carried out long±term to compensate for continual deviation
of the short±term fuel trim from the central value due to individual engine differences, wear over time and
changes in the usage environment.
If both the short±term fuel trim and long±term fuel trim are LEAN or RICH beyond a certain value, it is
detected as a malfunction and the MIL lights up.
DTC No.DTC Detecting ConditionTrouble Area
P0171
When air±fuel ratio feedback is stable after engine warming up,
fuel trim is considerably in error on RICH side
(2 trip detection logic)

Gas leakage on exhaust system

Air intake (hose loose)

Fuel line pressure

Injector blockage

Heated oxygen sensor (bank 1 sensor 1)

Manifold absolute pressure sensor

Engine coolant temp. sensor
P0172
When air±fuel ratio feedback is stable after engine warming up,
fuel trim is considerably in error on LEAN side
(2 trip detection logic)

Gas leakage on exhaust system

Fuel line pressure

Injector leak, blockage

Heated oxygen sensor (bank 1 sensor 1)

Manifold absolute pressure sensor

Engine coolant temp. sensor
HINT:

When the DTC P0171 is recorded, the actual air±fuel ratio is on the LEAN side. When DTC P0172 is
recorded, the actual air±fuel ratio is on the RICH side.

If the vehicle runs out of fuel, the air±fuel ratio is LEAN and DTC P0171 is recorded. The MIL then
comes on.

If the total of the short±term fuel trim value and long±term fuel trim value is within + 38 %, the system
is functioning normally.

The heated oxygen sensor (bank 1 sensor 1) output voltage and the short±term fuel trim value can
be read using the OBD II scan tool or TOYOTA hand±held tester.
DI4NG±01