EGR Monitors

DRIVE PATTERN NO. 1: EGR Monitor (All Except 1FZ-FE Engine)

Preconditions

The monitor will not run unless:

^ MIL is OFF.

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

^ IAT (Intake Air) is 14°F (-10°C) or greater.

Drive Pattern Procedure

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

a. If IAT (Intake Air) is less than 50°F (10°C) when starting the engine, idle the engine for approximately 10 minutes.

b. 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.

c. Stop the vehicle and let the engine idle for 3 - 5 minutes.

d. Repeat steps "B" and "C" once.

If readiness status does not switch to "complete," ensure preconditions are met, turn the ignition OFF, then repeat steps "b" through "d."

NOTE
^ The readiness status may not switch to "complete" after the first drive pattern trip it 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.





DRIVE PATTERN NO. 2: EGR Monitor (for 1FZ-FE Engine)

Preconditions

The monitor will not run unless:

^ MIL Is OFF.

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

^ IAT (Intake Air) is 14°F (-10°C) or greater.

^ ECT (Coolant Temp) is less than 104°F (40°C).

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.

^ 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 "a" and "b" once.

If readiness status does not switch to "complete," ensure preconditions are met. turn the ignition OFF, then repeat steps "a" through "c."

NOTE
The readiness status may not switch to "complete" 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.