TOYOTA CAMRY 1999 Service Repair Manual

READINESS MONITOR DRIVE PATTERNS ± EG003-02 RevisedMarch 29, 2002
Page 11 of 23
DRIVE PATTERN NO. 2: EGR Monitor (for 1FZ±FE Engine)
43 ± 56 mph
(70 ± 90 km/h)
Idling
IG SW off
3 ± 5 min 3 ± 5 min
3 ± 5 min
(b)3 ± 5 min
(c) (a)
Preconditions
The monitor will not run unless:

MIL is OFF.

Altitude is 7800 feet (2400 m) or less.

IAT (Intake Air) is 14F (±10C) or greater.

ECT (Coolant Temp) is less than 104F (40C).
Drive Pattern Procedure
Connect the OBDII Scantool to DLC3 to check monitor status and preconditions.
a. Start the engine and as soon as safely possible begin driving the vehicle at 43 ±
56 mph (70 ± 90 km/h) for a period of 3 ± 5 minutes.
NOTE:

Do not allow the Throttle Position (TP) to exceed 30%.

Drive with smooth throttle operation and avoid sudden acceleration.
b. Stop the vehicle and let the engine idle for 3 ± 5 minutes.
c. Repeat steps ªaº and ªbº once.
If readiness status does not switch to ªcomplete,º ensure preconditions are met, turn the
ignition OFF, then repeat steps ªaº through ªc.º
NOTE:
The readiness status may not switch to ªcompleteº after the first drive pattern trip if a
Pending Code has been set (first trip for a two±trip DTC).

Pending Codes are available from the DTC Info Menu in Enhanced OBDII.

Pending Codes indicate a POTENTIAL problem was detected. A second trip is
needed to confirm the DTC prior to diagnosis.

Once a second trip is completed, a current DTC will be stored. Readiness
Monitor
Drive
Patterns:
EGR Monitors
(Continued)

READINESS MONITOR DRIVE PATTERNS ± EG003-02 RevisedMarch 29, 2002
Page 12 of 23
DRIVE PATTERN NO. 3: Catalyst Monitor (O2S Type)
40 ± 50 mph
(64 ± 88 km/h)
35 ± 45 mph
(56 ± 72 km/h)
Idling
IG SW off
Warm up
ECT.176FIAT < 50F = 7 min
IAT > 50F = 3 min
(a)7 min
(b)
Preconditions
The monitor will not run unless:

MIL is OFF.

ECT (Coolant Temp) is 176F (80C) or greater.

IAT (Intake Air) is 14F (±10C) or greater.*
* For 2002 MY and later vehicles: The readiness test can be completed in cold ambient conditions
(less than 14F / ±10C), if the drive pattern is repeated a second time after cycling the ignition OFF.
Drive Pattern Procedure
Connect the OBDII Scantool to DLC3 to check monitor status and preconditions.
Note the IAT (Intake Air) value during engine startup. The driving time must be adjusted
during step ªaº based upon IAT (Intake Air) value at startup.
a. Drive the vehicle at 40 ± 55 mph (64 ± 88 km/h) for the time described below:

If IAT (Intake Air) was less than 50F (10C) when the engine was started,
drive for 7 minutes.

If IAT (Intake Air) was greater than 50F (10C) when the engine was started,
drive for 3 minutes.
b. Drive the vehicle at 35 ± 45 mph (56 ± 72 km/h) for approximately 7 minutes.
NOTE:

Drive with smooth throttle operation.

Avoid sudden acceleration.

Avoid sudden deceleration as much as possible with the throttle fully closed.
If readiness status does not switch to ªcomplete,º ensure preconditions are met, turn the
ignition OFF, then repeat steps ªaº and ªb.º
NOTE:
The readiness status may not switch to ªcompleteº after the first drive pattern trip if a
Pending Code has been set (first trip for a two±trip DTC).

Pending Codes are available from the DTC Info Menu in Enhanced OBDII.

Pending Codes indicate a POTENTIAL problem was detected. A second trip is
needed to confirm the DTC prior to diagnosis.

Once a second trip is completed, a current DTC will be stored. Readiness
Monitor
Drive
Patterns:
Catalyst
Monitors

READINESS MONITOR DRIVE PATTERNS ± EG003-02 RevisedMarch 29, 2002
Page 13 of 23
DRIVE PATTERN NO. 4: Catalyst Monitor (AF Sensor Type)
IAT < 50F = 7 min
IAT > 50F = 3 min
(a)
40 ± 50 mph
(64 ± 88 km/h)
Idling
IG SW off
16 min
(b) 35 ± 45 mph
(56 ± 72 km/h)
Warm up
ECT.176F
Preconditions
The monitor will not run unless:

MIL is OFF.

ECT (Coolant Temp) is 176F (80C) or greater.

IAT (Intake Air) is 14F (±10C) or greater.*
* For 2002 MY and later vehicles: The readiness test can be completed in cold ambient conditions
(less than 14F / ±10C), if the drive pattern is repeated a second time after cycling the ignition OFF.
Drive Pattern Procedure
Connect the OBDII Scantool to DLC3 to check monitor status and preconditions.
Note the IAT (Intake Air) value during engine startup. The driving time must be adjusted
during step ªaº based upon IAT (Intake Air) value at startup.
a. Drive the vehicle at 40 ± 55 mph (64 ± 88 km/h) for the time described below:

If IAT (Intake Air) was less than 50F (10C) when the engine was started,
drive for 7 minutes.

If IAT (Intake Air) was greater than 50F (10C) when the engine was started,
drive for 3 minutes.
b. Drive the vehicle allowing speed to fluctuate between 35 ± 45 mph (56 ± 72 km/h)
for about 16 minutes.
NOTE:

Drive with smooth throttle operation.

Avoid sudden acceleration.

Avoid sudden deceleration as much as possible with the throttle fully closed.
If readiness status does not switch to ªcomplete,º ensure preconditions are met, turn the
ignition OFF, then repeat steps ªaº and ªb.º
NOTE:
The readiness status may not switch to ªcompleteº after the first drive pattern trip if a
Pending Code has been set (first trip for a two±trip DTC).

Pending Codes are available from the DTC Info Menu in Enhanced OBDII.

Pending Codes indicate a POTENTIAL problem was detected. A second trip is
needed to confirm the DTC prior to diagnosis.

Once a second trip is completed, a current DTC will be stored. Readiness
Monitor
Drive
Patterns:
Catalyst
Monitors
(Continued)

READINESS MONITOR DRIVE PATTERNS ± EG003-02 RevisedMarch 29, 2002
Page 14 of 23
DRIVE PATTERN NO. 5: EVAP Monitor
(Internal Pressure Monitor/Non±Intrusive Type)
45 mph
(72 km/h)
25 mph
(40 km/h)
Idling
IG SW off
Soak
(1b)5 min
(2a)15 min
(2b) Warm up
ECT.176F
(1a)
Cold Soak Drive Pattern
Cold Soak Preconditions
The monitor will not run unless:

MIL is OFF.

Fuel level is between 1/2 to 3/4 full (for faster completion)
.

Altitude is 7800 feet (2400 m) or less.
IMPORTANT:
A cold soak must be performed prior to conducting the drive pattern to complete the
Internal Pressure Readiness Monitor.
Cold Soak Procedure
1a. Start the engine and allow ECT (Coolant Temp) to reach 176F (80C) or greater.
(This can be done by letting the engine idle or by driving the vehicle.)
1b. Let the vehicle cold soak for 8 hours or until the difference between IAT (Intake
Air) and ECT (Coolant Temp) is less than 13F (7C).
Example 1

ECT (Coolant Temp) = 75F (24C).

IAT (Intake Air) = 60F (16C).

Difference between ECT (Coolant Temp) and IAT (Intake Air) is 15F (8C).
%The monitor will not run because the difference between ECT (Coolant
Temp) and IAT (Intake Air) is greater than 13F (7C).
Example 2

ECT (Coolant Temp) = 70F (21C).

IAT (Intake Air) = 68F (20C).

Difference between ECT (Coolant Temp) and IAT (Intake Air) is 2F (1C).
%The monitor will run because the difference between ECT (Coolant Temp)
and IAT (Intake Air) is less than 13F (7C).
Readiness
Monitor
Drive
Patterns:
EVAP
Monitors

READINESS MONITOR DRIVE PATTERNS ± EG003-02 RevisedMarch 29, 2002
Page 15 of 23
Drive Pattern Preconditions
The monitor will not run unless:

MIL is OFF.

Fuel level is between 1/2 to 3/4 full (for faster completion)
.

Altitude is 7800 feet (2400 m) or less.

ECT (Coolant Temp) is between 40F and 95F (4.4C ± 35C).

IAT (Intake Air) is between 40F and 95F (4.4C ± 35C).

Cold Soak Procedure has been completed.
NOTE:
Before starting the engine, the difference between ECT (Coolant Temp) and IAT (Intake
Air) must be less than 13F (7C). (Refer to Examples 1 and 2 on previous page.)
Drive Pattern Procedure

Connect the OBDII Scantool to DLC3 to check monitor status and preconditions.

Release the pressure in the fuel tank by removing and then reinstalling the fuel tank
cap.

Start the engine and begin driving as directed.
NOTE:

Do not turn the ignition off until the drive pattern is complete.

Drive on smooth roads to reduce excessive fuel sloshing.
2a. Start the engine and as soon as safely possible begin driving at approximately 45
mph (72km/h) for 5 minutes. (See illustration on previous page.)
2b. Drive the vehicle at approximately 25 mph (40 km/h) for 15 minutes and include a
minimum of two stops for approximately 30 seconds. (See illustration on previous
page.)
The monitor should complete within approximately 20 minutes. If it does not, ensure
preconditions are met and repeat the drive pattern process beginning with the Cold Soak
Procedure.
NOTE:
The readiness status may not switch to ªcompleteº after the first drive pattern trip if a
Pending Code has been set (first trip for a two±trip DTC).

Pending Codes are available from the DTC Info Menu in Enhanced OBDII.

Pending Codes indicate a POTENTIAL problem was detected. A second trip is
needed to confirm the DTC prior to diagnosis.

Once a second trip is completed, a current DTC will be stored. Readiness
Monitor
Drive
Patterns:
EVAP
Monitors
(Continued)

READINESS MONITOR DRIVE PATTERNS ± EG003-02 RevisedMarch 29, 2002
Page 16 of 23
DRIVE PATTERN NO. 6: EVAP Monitor (Vacuum Pressure Monitor/Intrusive Type)
Idling
IG SW off
Warm up
(2a) Soak
(1a)15 ±50 min
(When the Readiness Monitor or
DTC is set, this test is complete.)
(2c)
10 sec
(2b)
3,000 rpm
Cold Soak Preconditions
The monitor will not run unless:

MIL is OFF.

Fuel level is between 1/2 to 3/4 full (for faster completion)
.

Altitude is 7800 feet (2400 m) or less.
Cold Soak Procedure
1a. Let the vehicle cold soak for 8 hours or until the difference between IAT (Intake
Air) and ECT (Coolant Temp) is less than 13F (7C).
Example 1

ECT (Coolant Temp) = 75F (24C).

IAT (Intake Air) = 60F (16C).

Difference between ECT (Coolant Temp) and IAT (Intake Air) is 15F (8C).
%The monitor will not run because the difference between ECT (Coolant
Temp) and IAT (Intake Air) is greater than 13F (7C).
Example 2

ECT (Coolant Temp) = 70F (21C).

IAT (Intake Air) = 68F (20C).

Difference between ECT (Coolant Temp) and IAT (Intake Air) is 2F (1C).
%The monitor will run because the difference between ECT (Coolant Temp)
and IAT (Intake Air) is less than 13F (7C).
Readiness
Monitor
Drive
Patterns:
EVAP
Monitors
(Continued)

READINESS MONITOR DRIVE PATTERNS ± EG003-02 RevisedMarch 29, 2002
Page 17 of 23
Drive Pattern Preconditions
The monitor will not run unless:

MIL is OFF.

Fuel level is between 1/2 to 3/4 full (for faster completion)
.

Altitude is 7800 feet (2400 m) or less.*

ECT (Coolant Temp) is between 40F and 95F (4.4C ± 35C).

IAT (Intake Air) is between 40F and 95F (4.4C ± 35C).*

Cold Soak Procedure has been completed.
* For 2002 MY and later vehicles: The readiness test can be completed in cold ambient conditions
(less than 40F / 4.4C) and/or at high altitudes (more than 7800 feet / 2400 m) if the complete drive
pattern (including Cold Soak) is repeated a second time after cycling the ignition OFF.
NOTE:
Before starting the engine, the difference between ECT (Coolant Temp) and IAT (Intake
Air) must be less than 13F (7C). (Refer to Examples 1 and 2 on previous page.)
Drive Pattern Procedure

Connect the OBDII Scantool to DLC3 to check monitor status and preconditions.

Release the pressure in the fuel tank by removing and then reinstalling the fuel tank
cap.
2a. Start the engine and allow it to idle until ECT (Coolant Temp) is 167F (75C) or
greater. (See illustration on previous page.)
2b. Race the engine at 3,000 rpm for approximately 10 seconds. (See illustration on
previous page.)
2c. Allow the engine to idle with the A/C ON (to create a slight load) for 15 ± 50
minutes. (See illustration on previous page.)
NOTE:
If the vehicle is not equipped with A/C put a slight load on the engine by doing the
following:

Securely set the parking brake.

Block the drive wheels with wheel chocks.

Allow the vehicle to idle in drive for 15 ± 50 minutes.
NOTE:
The readiness status may not switch to ªcompleteº after the first drive pattern trip if a
Pending Code has been set (first trip for a two±trip DTC).

Pending Codes are available from the DTC Info Menu in Enhanced OBDII.

Pending Codes indicate a POTENTIAL problem was detected. A second trip is
needed to confirm the DTC prior to diagnosis.

Once a second trip is completed, a current DTC will be stored. Readiness
Monitor
Drive
Patterns:
EVAP
Monitors
(Continued)

READINESS MONITOR DRIVE PATTERNS ± EG003-02 RevisedMarch 29, 2002
Page 18 of 23
DRIVE PATTERN NO. 7: EVAP Monitor (Without Leak Detection)
43 ± 56 mph
(70 ± 90 km/h)
Idling
IG SW off
3 ± 5 min 3 ± 5 min3 ± 5 min
(a) (b)3 ± 5 min
(c) Warm up
ECT.181F
Preconditions
The monitor will not run unless:

MIL is OFF.

Altitude is 7800 feet (2400 m) or less.

ECT (Coolant Temp) is 181F (83C) or greater.

IAT (Intake Air) is 41F (5C) or greater.
Drive Pattern Procedure
Connect the OBDII Scantool to DLC3 to check monitor status and preconditions.
a. Drive the vehicle at 43 ± 56 mph (70 ± 90 km/h) for a period of 3 ± 5 minutes.
NOTE:

Do not allow the Throttle Position (TP) to exceed 30%.

Drive with smooth throttle operation and avoid sudden acceleration.
b. Stop the vehicle and let the engine idle for 3 ± 5 minutes.
c. Repeat steps ªaº and ªbº once.
If readiness status does not switch to ªcomplete,º ensure preconditions are met, turn the
ignition OFF, then repeat steps ªaº through ªc.º
NOTE:
The readiness status may not switch to ªcompleteº after the first drive pattern trip if a
Pending Code has been set (first trip for a two±trip DTC).

Pending Codes are available from the DTC Info Menu in Enhanced OBDII.

Pending Codes indicate a POTENTIAL problem was detected. A second trip is
needed to confirm the DTC prior to diagnosis.

Once a second trip is completed, a current DTC will be stored. Readiness
Monitor
Drive
Patterns:
EVAP
Monitors
(Continued)

READINESS MONITOR DRIVE PATTERNS ± EG003-02 RevisedMarch 29, 2002
Page 19 of 23
DRIVE PATTERN NO. 8: EVAP Monitor (For Prius)
Idling
IG SW off
Soak
(1a)15 min
(When the Readiness Monitor or
DTC is set, this test is complete.)
(2a)
50 ± 65 mph
(80 ± 104 km/h)
Cold Soak Preconditions
The monitor will not run unless:

MIL is OFF.

Altitude is 7800 feet (2400 m) or less.
IMPORTANT:
A cold soak must be performed prior to conducting the drive pattern to complete the
Internal Pressure Readiness Monitor.
Cold Soak Procedure
1a. Let the vehicle cold soak for 8 hours or until the difference between IAT (Intake
Air) and ECT (Coolant Temp) is less than 13F (7C).
Example 1

ECT (Coolant Temp) = 75F (24C).

IAT (Intake Air) = 60F (16C).

Difference between ECT (Coolant Temp) and IAT (Intake Air) is 15F (8C).
%The monitor will not run because the difference between ECT (Coolant
Temp) and IAT (Intake Air) is greater than 13F (7C).
Example 2

ECT (Coolant Temp) = 70F (21C).

IAT (Intake Air) = 68F (20C).

Difference between ECT (Coolant Temp) and IAT (Intake Air) is 2F (1C).
%The monitor will run because the difference between ECT (Coolant Temp)
and IAT (Intake Air) is less than 13F (7C).
Readiness
Monitor
Drive
Patterns:
EVAP
Monitors
(Continued)

READINESS MONITOR DRIVE PATTERNS ± EG003-02 RevisedMarch 29, 2002
Page 20 of 23
Drive Pattern Preconditions
The monitor will not run unless:

MIL is OFF.

Altitude is 7800 feet (2400 m) or less.

ECT (Coolant Temp) is between 40F and 95F (4.4C ± 35C).

IAT (Intake Air) is between 40F and 95F (4.4C ± 35C).*

Cold Soak Procedure has been completed.
NOTE:
Before starting the engine, the difference between ECT (Coolant Temp) and IAT (Intake
Air) must be less than 13F (7C). (Refer to Examples 1 and 2 on previous page.)
Drive Pattern Procedure

Connect the OBDII Scantool to DLC3 to check monitor status and preconditions.

Release the pressure in the fuel tank by removing and then reinstalling the fuel tank
cap.

Start the engine and as soon as safely possible begin driving as directed.
2a. Drive the vehicle at 50 ± 65 mph (80 ± 104 km/h) for about 15 minutes. (See
illustration on previous page.)
NOTE:

Do not turn the ignition off until the drive pattern is complete.

Drive on smooth roads to reduce excessive fuel sloshing.
If vehicle speed drops under 45 mph (72 km/h) repeat step ª2a.º
Readiness
Monitor
Drive
Patterns:
EVAP
Monitors
(Continued)