2000 TOYOTA CAMRY ignition

2. INSPECT COOLING SYSTEM FOR LEAKS
(a) Fill the radiator with coolant and attach a radiator cap
tester.
(b) Warm up the engine.
(c) Pump it to 118 kPa (1.2 kgf/cm
, 17.1 psi), and check
that the pressure does not drop.
If the pressure drops, check the hoses, radiator or
water pump for leaks. If no external leaks are found,
check the heater core, cylinder block and head.
RADIATOR REMOVAL
1. DISCONNECT NEGATIVE (±) TERMINAL CABLE
FROM BATTERY
CAUTION: Work must be started after 90 seconds from
the time the ignition switch is turned to the ªLOCKº
position and the negative (±) terminal cable is discon±
nected from the battery.
COMPONENTS FOR REMOVAL AND
INSTALLATION
± 5S±FE ENGINECOOLING SYSTEMEG1±251

9=4 ±01
ELECTRIC COOLING FAN COMPONENTS
INSPECTION
1. INSPECT ENGINE COOLANT TEMPERATURE
SWITCH
(a) Using an ohmmeter, check that there is no continuity
between the terminals when the engine coolant tem±
perature is above 93
C (199
F).
(b) Using an ohmmeter, check that there is continuity
between the terminals when the engine coolant tem±
perature is below 83
C (181
F).
If continuity is not as specified, replace the switch. 2. DISCONNECT ENGINE COOLANT TEMPERATURE
SWITCH CONNECTOR
Check that the cooling fan rotates.
If not, check the cooling fan relay, cooling fan, engine
main relay and fuse, and check for a short circuit
between the cooling fan relay and engine coolant
temperature switch.
3. CONNECT ENGINE COOLANT TEMPERATURE
SWITCH CONNECTOR
ON±VEHICLE INSPECTION
Low Temperature (Below 83

C (181
F))
1. TURN IGNITION SWITCH ªONº
Check that the cooling fan stops.
If not, check the cooling fan relay and engine coolant
temperature switch, and check for a separated con±
nector or severed wire between the cooling fan relay
and engine coolant temperature switch.
High Temperature (Above 93
C (199
F))
4. START ENGINE
(a) Raise engine coolant temperature to above 93
C
(199
F).
(b) Check that the cooling fan rotates.
If not, replace the engine coolant temperature switch.
± 5S±FE ENGINECOOLING SYSTEMEG1±262

ELECTRIC COOLING FAN REMOVAL
(See Components for Removal and Installation)
1. DISCONNECT NEGATIVE (±) TERMINAL CABLE
FROM BATTERY
CAUTION: Work must be started after 90 seconds from
the time the ignition switch is turned to the 'LOCK'
position and the negative (±) terminal cable is discon±
nected from the battery.
5. REMOVE ELECTRIC COOLING FAN
(a) Disconnect the engine coolant temperature switch
connector from the radiator.
(b) Disconnect the engine coolant temperature switch
and electric cooling fan connectors from the fan
shroud.
(c) Remove the 4 bolts and cooling fan. 2. DRAIN ENGINE COOLANT (See page EG1±241)
3. w/ CRUISE CONTROL SYSTEM:
REMOVE CRUISE CONTROL ACTUATOR COVER
4. DISCONNECT UPPER RADIATOR HOSE FROM
RADIATOR
COMPONENTS FOR DISASSEMBLY AND
ASSEMBLY
± 5S±FE ENGINECOOLING SYSTEMEG1±265

1. DISCONNECT NEGATIVE (±) TERMINAL CABLE
FROM BATTERY
CAUTION: Work must be started after 90 seconds from
the time the ignition switch is turned to the ªLOCKº
position and the negative (±) terminal cable is discon±
nected from the battery.
2. REMOVE HOOD
3. DRAIN ENGINE OIL (See page EG1±274)
OIL PUMP REMOVAL
HINT: When repairing the oil pump, the oil pan and
strainer should be removed and cleaned.
OIL PUMP
COMPONENTS FOR REMOVAL AND
INSTALLATION
± 5S±FE ENGINELUBRICATION SYSTEMEG1±276

HOW TO PROCEED WITH TROUBLESHOOTING
The Engine Control System broadly consists of the sensors, Engine Control Module (ECM) and actuators.
The ECM receives signals from various sensors, judges the operating conditions and determines the
optimum injection duration, timing, ignition timing and idle speed.
In general, the Engine Control System is considered to be a very intricate system to troubleshoot. But, the
fact is that if you proceed to inspect the circuit one by one following the procedures directed in this manu-
al, troubleshooting of this system is not complex.
This section explains the most ideal method of troubleshooting and tells how to carry out the necessary
repairs.
1. CUSTOMER PROBLEM ANALYSIS
Using the customer problem analysis check sheet for reference, ask the customer in as much details
as possible about the problem.
2. CHECK AND CLEAR DIAGNOSTIC TROUBLE CODE (PRECHECK)
Before confirming the problem symptom, first check the diagnostic trouble code and make a note of
any malfunction code which is output, then clear the code.
HINT: Output of the malfunction code indicates that there is a malfunction in the circuit indicated.
However, it does not indicate whether the malfunction is still occurring or occurred in the past and
returned to normal. In order to determine this, the problem sym toms should be confirmed in step 4
first and the diagnostic trouble code be rechecked in step [6].
Accordingly, if troubleshooting is begun based on the malfunction code only in diagnostic trouble
code check in step [2], it could result in a misdiagnosis, leading to troubleshooting of circuits which
are normal and making it more difficult to locate the cause of the problem.
3. SETTING THE TEST MODE DIAGNOSIS, [4] PROBLEM SYMPTOM CONFIRMATION,
[5] SYMPTOM SIMULATION
In order to find out the trouble more quickly, set the diagnosis check in test mode and with higher
sensing ability of the ECM, confirm the problem symptoms. If the trouble does not reappear, use the
symptom simulation method to make sure the trouble is reproduced.
6. DIAGNOSTIC TROUBLE CODE CHECK IN TEST MODE
Check the diagnostic trouble code in test mode. If the malfunction code is output, proceed to step. If the
normal code is output, proceed to step [7].
7. BASIC INSPECTION
Carry out basic inspection such as the spark check and fuel pressure check, etc.
8. DIAGNOSTIC TROUBLE CODE CHART
If the malfunction code is displayed, proceed to inspect the circuit indicated by the chart for each
code.
9. MATRIX CHART OF PROBLEM SYMPTOMS
If the normal code is displayed in the diagnosis in test mode, perform troubleshooting according to
the inspection order in the Matrix Chart of Problem Symptoms.
10. PARTS INSPECTION
When the Matrix Chart of Problem Symptoms instructs to check the parts, proceed to parts inspection
section included in this manual.
11. CIRCUIT INSPECTION
Determine if the malfunction is the sensor, actuator, wire harness, connector or the ECM.
± 5S±FE ENGINEHOW TO PROCEED WITH TROUBLESHOOTINGEG1±292

DIAGNOSIS SYSTEM
DESCRIPTION
The ECM contains a built±in self±diagnosis system by which
troubles with the engine signal network are detected and a
Malfunction indicator lamp on the instrument panel lights up.
By analyzing various signals as shown in the later table (See
page EG1±300) the Engine Control Module (ECM) detects
system malfunctions relating to the sensors or actuators.
In the normal mode, the self±diagnosis system monitors 14
items, indicated by code No. as shown in EG1±300. A mal-
function indicator lamp informs the driver that a malfunction
has been detected. The light goes off automatically when the
malfunction has been repaired. But the diagnostic trouble
code(s) remains stored in the ECM memory (except for code
Nos. 16). The ECM stores the code(s) until it is cleared by
removing the EFI fuse with the ignition switch off.
The diagnostic trouble code can be read by the number of
blinks of the malfunction indicator lamp when TE1 and E1
terminals on the data link connector 1 or 2 are connected.
When 2 or more codes are indicated, the lowest number
(code) will appear first.
In the test mode, 9 items, indicated by code No. as shown in
EG1±300 are monitored. If a malfunction is detected in any
one of the systems indicated by code Nos. 13, 22, 24, 25, 26,
27, 31, 41 and 71 the ECM lights the malfunction indicator
lamp to warn the technician that malfunction has been de-
tected. In this case, TE2 and E1 terminals on the data link
connector 1 or 2 should be connected as shown later. (See
page EG1±298).
In the test mode, even if the malfunction is corrected, the
malfunction code is stored in the ECM memory even when
the ignition switch is off (except code Nos. 43 and 51). This
also applies in the normal mode. The diagnostic mode (nor-
mal or test) and the output of the malfunction indicator lamp
can be selected by connecting the TE1, TE2 and E1 termi-
nals on the data link connector 1 or 2, as shown later.
A test mode function has been added to the functions of the
self±diagnostic system of the normal mode for the purpose of
detecting malfunctions such as poor contact, which are diffi-
cult to detect in the normal mode. This function fills up the
self±diagnosis system. The test mode can be implemented
by the technician following the appropriate procedures of
check terminal connection and operation described later.
(See page
EG1±298)
± 5S±FE ENGINEDIAGNOSIS SYSTEMEG1±296

Diagnosis Inspection (Normal Mode)
MALFUNCTION INDICATOR LAMP CHECK
1. The Malfunction indicator lamp will come on when the
ignition switch is turned ON and the engine is not run±
ning.
HINT: If the malfunction indicator lamp does not light
up, proceed to troubleshooting of the combination meter
(See page BE±64).
2. When the engine is started, the malfunction indicator
lamp should go off.
If the light remains on, the diagnosis system has detected
a malfunction or abnormality in the system.
DIAGNOSTIC TROUBLE CODE CHECK
1. Turn ignition switch on.
2. Using SST, connect terminals between TE1 and E1 of
data link connector 1 or 2.
SST 09843±18020
As an example, the blinking patterns for codes;normal,
12 and 31 are as shown on the illustration.
4. Check the details of the malfunction using the diagnostic
trouble code table on page EG1±300.
5. After completing the check, disconnect terminals TE1
and E1, and turn off the display.
HINT: I n the event of 2 or more malfunction codes,
indication will begin from the smaller numbered code
and continue in order to the larger.3. Read the diagnostic trouble code from malfunction indi±
cator lamp.
HINT: If a diagnostic trouble code is not output, check
the TE1 terminal circuit (See page EG1±430).
± 5S±FE ENGINEDIAGNOSIS SYSTEMEG1±297

Diagnosis Inspection (Test Mode)
Compared to the normal mode, the test mode has high sens±
ing ability to detect malfunctions.
It can also detect malfunctions in the starter signal circuit, the
IDL contact signal of the throttle position sensor, air condi±
tioning signal and Park/Neutral Position switch signal.
Furthermore, the same diagnostic items which are detected in
the normal mode can also be detected in the test mode.
DIAGNOSTIC TROUBLE CODE CHECK
1. Initial conditions.
(a) Battery voltage 11 V or more.
(b) Throttle valve fully closed.
(c) Transmission in neutral position.
(d) Air conditioning switched off.
2. Turn ignition switch off.
3. Using SST, connect terminals TE2 and E1 of data link
connector 1 or 2.
SST 09843±18020
4. Turn ignition switch on.
HINT:
wTo confirm that the test mode is operating, check that
the malfunction indicator lamp flashes when the igni±
tion switch is turned to ON.
wIf the malfunction indicator lamp does not flash, pro±
ceed to troubleshooting of the TE2 terminal circuit on
page EG1±430.
5. Start the engine.
6. Simulate the conditions of the malfunction described by
the customer.
7. After the road test, using SST, connect terminals TE1 and
E1 of data link connector 1 or 2.
SST 09843±18020
8. Read the diagnostic trouble code on malfunction indica±
tor lamp on the combination meter (See page EG1±297).
9. After completing the check, disconnect terminals TE1,
TE2 and E1, and turn off the display.
HINT:
wThe test mode will not start if terminals TE2 and E1 are
connected after the ignition switch is turned on.
wWhen vehicle speed is 3 mph (5 km/h) or below,
diagnostic trouble code ª42º (Vehicle speed signal) is
output, but this is not abnormal.
wWhen the engine is not cranked, diagnostic trouble
code ª43º (Starter signal) output, but this is not ab±
normal.
wWhen the automatic transmission shift lever is in the
ªDº, ª2º, ªLº or ªRº shift position, or when the air
conditioning is on or when the accelerator pedal is
depressed, code ª51º (Switch condition signal) is
output, but this is not abnormal.
± 5S±FE ENGINE DIAGNOSIS SYSTEMEG1±298