1999 TOYOTA CAMRY check engine light

DI00G±07
ENGINE CONTROL SYSTEM Check Sheet
Customer's Name
Driver's Name
Data Vehicle
Brought in
License No.
Model and Model
Year
Frame No.
Engine Model
Odometer Reading
Problem Symptoms
Engine does
not Start
Difficult to
Start
Poor Idling
Poor
Driveability
Engine Stall
Others
Engine does not crankNo initial combustionNo complete combustion
Engine cranks slowly
Other
Incorrect first idleIdling rpm is abnormalHigh ( rpm)Low ( rpm)
Rough idling
Other
HesitationBack fireMuffler explosion (after±fire)Surging
Knocking
Other
Soon after startingAfter accelerator pedal depressed
After accelerator pedal released
During A/C operation
Shifting from N to D
Other
Datas Problem
Occurred
Problem Frequency
Condition When
Problem Occurs
Weather
Engine Operation
Engine Temperature Place Outdoor
TemperatureConstant
Sometimes ( times per day/month)Once only
Other
Fine
CloudyRainySnowyVarious/Other
Hot
Warm CoolCold (approx. °F/ °C)
Highway
SuburbsInner cityUphillDownhill
Rough road
Other
Cold
Warming upAfter warming upAny temperatureOther
Starting
Just after starting ( min.)IdlingRacing
Driving
Constant speedAccelerationDeceleration
A/C switch ON/OFF
Other
Condition of MILRemains on Sometimes lights up Does not light up
NormalMalfunction code(s) (code )
Freezed frame data ( )
NormalMalfunction code(s) (code )
Freezed frame data ( )
Normal Mode
(Precheck)
Check Mode DTC InspectionInspector's
Name
km
miles
DI±2
± DIAGNOSTICSENGINE
CUSTOMER PROBLEM ANALYSIS CHECK

DI64S±01
S05347
S05331
TOYOTA Hand±Held Tester
DLC3
± DIAGNOSTICSENGINE
DI±3
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 to the vehicle the OBD II scan
tool complying with SAE J1978 or TOYOTA hand±
held tester, 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 emission control
system/components or in the power train control
components which affect vehicle emissions, or a
malfunction in the computer. In addition to the MIL
lighting up when a malfunction is detected, the ap-
plicable Diagnostic Trouble Code (DTC) prescribed
by SAE J2012 are recorded in the ECM memory.
(See page DI±14)
If the malfunction does not reoccur in 3 consecutive trips, the
MIL goes off automarially but the DTCs remain recorded in the
ECM memory.

To check the DTCs, connect the OBD II scan tool or
TOYOTA hand±held tester to the Data Link Con-
nector 3 (DLC3) on the vehicle. The OBD II scan
tool or TOYOTA hand±held tester also enables you
to erase the DTCs and check freezed frame data
and various forms of engine data (For operating
instructions, see the OBD II scan tool's instruction
book.)
DTCs include SAE controlled codes and manufac-
turer controlled codes. SAE controlled codes must
be set as prescribed by the SAE, while manufactur-
er controlled codes can be set freely by the
manufacturer within the prescribed limits. (See DTC
chart on page DI±14)

DI±4
± DIAGNOSTICSENGINE

The diagnosis system operates in normal mode
during normal vehicle use. It also has a check mode
for technicians to simulate malfunction symptoms
and troubleshoot. Most DTCs use 2 trip detection
logic* to prevent erroneous detection, and ensure
thorough malfunction detection. By switching the
ECM to check mode when troubleshooting, the
technician can cause the MIL to light up for a mal-
function that is only detected once or momentarily.
(TOYOTA hand±held tester only)
(See page DI±3)

*2 trip detection logic: When a malfunction is first
detected, the malfunction is temporarily stored in
the ECM memory. (1st trip)
If the same malfunction is detected again during the second
drive test, this second detection causes the MIL to light up. (2nd
trip) (However, the ignition switch must be turned OFF between
the 1st trip and 2nd trip.)

Freeze frame data:
Freeze frame data records the engine condition
when a misfire (DTCs P0300 ± P0304) or fuel trim
malfunction (DTCs P0171 and P0172) or other mal-
function (first malfunction only), is detected. Be-
cause freeze frame data records the engine condi-
tions (fuel system, calculated load, engine coolant
temperature, fuel trim, engine speed, vehicle
speed, etc.) when the malfunction is detected.
When troubleshooting, it is useful for determining
whether the vehicle was running or stopped, the en-
gine was warmed up or not, the air±fuel ratio was
lean or rich, etc. at the time of the malfunction.

Priorities for troubleshooting.
If troubleshooting priorities for multiple DTCs are given in the
applicable DTC chart, these should be followed.
If no instructions are given, troubleshoot DTCs according to the
following priorities.
(1) DTCs other than fuel trim malfunction (DTCs P0171
and P0172), EGR (DTCs P0401 and P0402), and
misfire (DTCs P0300 ± P0304).
(2) Fuel trim malfunction (DTCs P0171 and P0172),
and EGR (DTCs P0401 and P0402).
(3) Misfire (DTCs P0300 ± P0304).

A04550
DLC3
1
234
56
7
8
9
10 11 12 13 1415
16
S05347
± DIAGNOSTICSENGINE
DI±5
(b) Check the DLC3.
The vehicle's ECM uses ISO 9141±2 for communication.
The terminal arrangement of DLC3 complies with SAE
J1962 and matches the ISO 9141±2 format.
Terminal No.Connection/Voltage or ResistanceCondition
7Bus  Line/Pulse generationDuring transmission
4Chassis Ground e Body Ground/1 W or lessAlways
5Signal Ground e Body Ground/1 W or lessAlways
16Battery Positive e Body Ground/9 ± 14 VAlways
HINT:
If your display shows UNABLE TO CONNECT TO VEHICLE
when you have connected the cable of the OBD II scan tool or
TOYOTA hand±held tester to DLC3, turned the ignition switch
ON and operated the scan tool, there is a problem on the ve-
hicle side or tool side.

If communication is normal when the tool is connected to
another vehicle, inspect DLC3 on the original vehicle.

If communication is still not possible when the tool is con-
nected to another vehicle, the problem is probably in the
tool itself, so consult the Service Department listed in the
tool's instruction manual.
2. INSPECT DIAGNOSIS (Normal Mode)
(a) Check the MIL.
(1) The MIL comes on when the ignition switch is turned
ON and the engine is not running.
HINT:
If the MIL does not light up, troubleshoot the combination meter
(See Pub. No. RM654U, page BE±2).
(2) When the engine started, the MIL should go off. If
the lamp remains on, the diagnosis system has de-
tected a malfunction or abnormality in the system.
(b) Check the DTC.
NOTICE:
TOYOTA hand±held tester only: When the diagnosis sys-
tem is switched from normal mode to check mode, it
erases all DTCs and freezed frame data recorded in normal
mode. So before switching modes, always check the DTCs
and freezed frame data, and note them down.
(1) Prepare the OBD II scan tool (complying with SAE
J1978) or TOYOTA hand±held tester.

DI±6
± DIAGNOSTICSENGINE
(2) Connect the OBD II scan tool or TOYOTA hand±
held tester to DLC3 under the instrument panel low-
er pad.
(3) Turn the ignition switch ON and turn the OBD II scan
tool or TOYOTA hand±held tester switch ON.
(4) Use the OBD II scan tool or TOYOTA hand±held
tester to check the DTCs and freezed frame data
and note them down. (For operating instructions,
see the OBD II scan tool's instruction book.)
(5) See page DI±3 to confirm the details of the DTCs.
NOTICE:

When simulating symptoms with an OBD II scan tool
(excluding TOYOTA hand±held tester) to check the
DTCs, use normal mode. For code on the DTC chart
subject to º2 trip detection logicº, perform the follow-
ing either action.

Turn the ignition switch OFF after the symptom is
simulated the first time. Then repeat the simulation
process again. When the problem has been simulated
twice, the MIL lights up and the DTCs are recorded in
the ECM.

Check the 1st trip DTC using Mode 7 (Continuous Test
Results) for SAE J1979.
(c) Clear the DTC.
The DTCs and freezed frame data will be erased by either
action.
(1) Operating the OBD II scan tool (complying with SAE
J1978) or TOYOTA hand±held tester to erase the
codes. (See the OBD II scan tool's instruction book
for operating instructions.)
(2) Disconnecting the battery terminals or EFI fuse.
NOTICE:
If the TOYOTA hand±held tester switches the ECM from
normal mode to check mode or vice±versa, or if the ignition
switch is turned from ON to ACC or OFF during check
mode, the DTCs and freezed frame data will be erased.
3. INSPECT DIAGNOSIS (Check Mode)
HINT:
TOYOTA hand±held tester only:
Compared to the normal mode, the check mode has an in-
creased sensitivity to detect malfunctions.
Furthermore, the same diagnostic items which are detected in
the normal mode can also be detected in the check mode.
(a) Check the DTC.
(1) Initial conditions

Battery positive voltage 11 V or more

Throttle valve fully closed

Transmission in P or N position

Air conditioning switched OFF
(2) Turn ignition switch OFF.

A07370S05309A07664
E1 TE1
SST
DLC1
A09429
DI±10
± DIAGNOSTICSENGINE
6 Check ignition timing.
PREPARATION:
(a) Warm up the engine to normal operating temperature.
(b) Shift the transmission into the N position.
(c) Keep the engine speed at idle.
(d) Using SST, connect terminals TE1 and E1 of the DLC1.
SST 09843±18020
(e) Using a timing light, connect the tester to the No.1 high±
tension cord.
CHECK:
Check the ignition timing.
OK:
Ignition timing: 10° BTDC at idle
NG Proceed to page IG±1 and continue to trouble-
shoot.
OK
Proceed to problem symptoms table on page
DI±21.
7 Check fuel shutoff valve for fuel tank.
PREPARATION:
(a) Be sure that enough fuel is in the tank.
(b) Connect the TOYOTA hand±held tester to the DLC3.
(c) Turn the ignition switch ON and push TOYOTA hand±held
tester main switch ON.
(d) Use the ACTIVE TEST mode to operate the fuel shutoff
valve for the fuel tank.
(e) Please refer to the TOYOTA hand±held tester operator's
manual for further details.
(f) If you have no TOYOTA hand±held tester, Connect be-
tween terminal FC of the ECM connector and body
ground.
CHECK:
Check the operating sound of the fuel shutoff valve for the fuel
tank when it is operated.

A09397
ECM
J18
J/C
7 From
Battery
B
213
EFI Relay VSV
for EGR
21P-B23
E6EGR
E01
2K2
2J EFI
Engine Room J/B No.2 1B 9
B-Y
B
2AB-Y
IG3
EB
W-B
2F4B-Y
5
B-YFrom
Ignition SW
P20769
Vehicle Speed
60 ± 80 km/h
(38 ± 50 mph)
Idling
IG SW OFF
(1)(2)
Warm up
3 ± 5 min.2 min.
3 ± 5 min.Time (3)
(4)
(5)(6)
(7)
2 min. DI±64
± DIAGNOSTICSENGINE
WIRING DIAGRAM
SYSTEM CHECK DRIVING PATTERN
(1) Connect the OBD II scan tool or TOYOTA hand±held tester to the DLC3.
(2) Start and warm up the engine with all the accessories switched OFF.
(3) Run the vehicle at 60 ± 80 km/h (38 ± 50 mph) for 3 min. or more.
(4) Idle the engine for about 2 min.
(5) Do steps (3) and (4) again.
(6) Stop at safe place and turn the ignition switch OFF.
(7) Do steps (2) to (5) again.
(8) Check the READINESS TESTS mode on the OBD II scan tool or TOYOTA hand±held tester.
If COMPL is displayed and the MIL does not light up, the system is normal.
If INCMPL is displayed and the MIL does not light up, run the vehicle again and check it.
HINT:
INCMPL is displayed when either condition (a) or (b) exists.
(a) The system check is incomplete.

A00407
Air
Air FilterAir
E
System: OFFSystem: ON GG E
± DIAGNOSTICSENGINE
DI±65
(b) There is a malfunction in the system.
If there is a malfunction in the system, the MIL will light up after steps (2) to (5) above are done. (2 trip
detection logic)
INSPECTION PROCEDURE
HINT:

If DTCs P0105, P0106 and P0400 are output simultaneously, perform troubleshooting of DTC P0105
first.

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 was warmed up or not, the air±fuel
ratio was lean or rich, etc. at the time of the malfunction.
TOYOTA hand±held tester:
1 Check connection of vacuum hose and EGR hose (See Pub. No. RM654U, page
EC±12).
NG Repair or replace.
OK
2 Check VSV for EGR.
PREPARATION:
(a) Connect the TOYOTA hand±held tester to the DLC3.
(b) Turn the ignition switch ON and push the TOYOTA hand±
held tester main switch ON.
(c) Select the ACTIVE TEST mode on the TOYOTA hand±
held tester.
CHECK:
Check the operation of the VSV when it is operated by the TOY-
OTA hand±held tester.
OK:
EGR system is OFF:
Air from port E is flowing out through the air filter.
EGR system is ON:
Air from port E is flowing out port G.
OK Go to step 4.
NG
3 Check operation of VSV for EGR (See Pub. No. RM654U, page SF±43).