Toyota Tundra. Manual — part 1477

2009 ENGINE PERFORMANCE

Engine Control System (3UR-FBE) - Tundra

SFI SYSTEM

PRECAUTION

HINT:

RESET MEMORY cannot be completed by only removing the battery.

DEFINITION OF TERMS

DEFINITION OF TERMS

CAUTION: When using the Techstream, observe the following items for safety

reasons:



Read its instruction books before using the Techstream.



Prevent the Techstream cable from being caught on the pedals, shift
lever and steering wheel when driving with the Techstream
connected to the vehicle.



When driving the vehicle for testing purposes using the Techstream,
2 persons are required. One person drives the vehicle, and the other
operates the Techstream.

NOTE:



After the ignition switch is turned off, the navigation system requires
approximately 90 seconds to record various types of memory and
settings. As a result, after turning the ignition switch off, wait 90 seconds
or more before disconnecting the cable from the negative (-) battery
terminal.



Perform initialization (throttle position) after replacing the throttle body
assembly or cleaning any throttle body components (See
INSTALLATION ).



Perform initialization (throttle position) after reconnecting the battery
cable or replacing the ECM (See INSTALLATION ).



Perform RESET MEMORY (AT initialization) when replacing the automatic
transmission assembly, engine assembly or ECM (see INITIALIZATION ).



Perform REGISTRATION (VIN registration) when replacing the ECM (see
REGISTRATION ).

Terms

Definition

Monitor Description

Description of what ECM monitors and how it detects malfunctions (monitoring
purpose and details).

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

PARTS LOCATION

Fig. 1: Identifying SFI System Part Location (1 Of 6)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Related DTCs

Group of diagnostic trouble codes that are output by ECM based on same
malfunction detection logic.

Typical Enabling
Condition

Preconditions that allow ECM to detect malfunctions.
With all preconditions satisfied, ECM sets DTC when monitored value(s)
exceeds malfunction threshold(s).

Sequence of Operation

Order of monitor priority, applied if multiple sensors and components involved
in single malfunction detection process.
Each sensor and component monitored in turn, when previous detection
operation completed.

Required
Sensor/Components

Sensors and components used by ECM to detect each malfunction.

Frequency of Operation

Number of times ECM checks for each malfunction during each driving cycle.
"Once per driving cycle" means ECM only performs checks for that malfunction
once during single driving cycle.
"Continuous" means ECM performs checks for that malfunction whenever
enabling conditions met.

Duration

Minimum time for which ECM must detect continuous deviation in monitored
value(s) in order to set DTC. Timing begins when Typical Enabling Conditions
met.

Malfunction Thresholds Value beyond which ECM determines malfunctions exist and sets DTCs.

MIL Operation

Timing of MIL illumination after malfunction detected.
"Immediate" means ECM illuminates MIL as soon as malfunction detected.
"2 driving cycle" means ECM illuminates MIL if same malfunction detected
second time during next sequential driving cycle.

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Fig. 2: Identifying SFI System Part Location (2 Of 6)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 3: Identifying SFI System Part Location (3 Of 6)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 4: Identifying SFI System Part Location (4 Of 6)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Fig. 5: Identifying SFI System Part Location (5 Of 6)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 6: Identifying SFI System Part Location (6 Of 6)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

SYSTEM DIAGRAM

Fig. 7: SFI System Diagram (1 Of 6)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra