Toyota Tundra (2015 year). Manual — part 1255

Last Modified: 9-16-2014

6.6 C

Doc ID: X39400000RM0K0C

Model Year: 2015

Model: Tundra

Prod Date Range: [08/2014 - ]

Title: 1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2109; Throttle / Pedal Position Sensor "A" Minimum

Stop Performance; 2015 MY Tundra [08/2014 - ]

DTC

P2109

Throttle / Pedal Position Sensor "A" Minimum Stop Performance

DESCRIPTION

The idling speed is controlled by the Electronic Throttle Control System (ETCS).

The ECM controls the throttle actuator to adjust the throttle valve opening amount so that the idling speed is

maintained at the target idling speed.

DTC

NO.

DTC DETECTION CONDITION

TROUBLE AREA

P2109

The ISC learned value is approximately 3 times larger than normal even though

the actual intake air amount during idling is within the normal range (up to 1.5

times the normal amount)

(5 trip detection logic)

Throttle with motor

body assembly

HINT:

If there are deposits in the throttle valve, a decrease in the ISC flow rate may cause engine stall and unstable

idling. Therefore, the necessary ISC flow rate for idling is maintained using the ISC learned value and feedback.

The ECM stores this DTC if the ISC learned value approaches its limit. The ECM begins monitoring for the DTC

detection conditions when the following preconditions are met; 1) the manifold absolute pressure sensor is

normal; 2) atmospheric pressure is 85 kPa (638 mmHg) or higher; 3) the vehicle has been driven at a speed of

30 km/h (19 mph) or more at least once; and 4) the engine coolant temperature is 45°C (113°F) or less at

engine start, the engine is warmed up and conditions for ISC learning are met, or the ignition switch has been

turned ON (include engine running) for 1 hour or more, the engine is warmed up and conditions for ISC learning

are met.

INSPECTION PROCEDURE

HINT:

Read freeze frame data using the Techstream. Freeze frame data records engine conditions when a
malfunction occurs. This information can be useful when troubleshooting.

Since a pending DTC is not stored for this DTC, it takes time to confirm whether the malfunction has been
successfully repaired by checking for this DTC. When confirming whether the malfunction has been

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2109; Throttle...

A

NEXT

successfully repaired, compare "ISC Learning Value" recorded in the freeze frame data with "ISC Learning
Value" in the Data List after repairs have been made to save time.

PROCEDURE

1.

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO P2109)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

(e) Read the DTCs.

RESULT

PROCEED TO

Only DTC P2109 is output

A

DTC P2109 and other DTCs are output

B

HINT:

If any DTCs other than P2109 are output, troubleshoot those DTCs first.

B

GO TO DTC CHART

2.

CHECK FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Using the Techstream, check "ISC Learning Value" in the freeze frame data

.

HINT:

Be sure to confirm "ISC Learning Value" in the freeze frame data as it is used when confirming whether the

malfunction has been successfully repaired.

3.

REMOVE FOREIGN OBJECT (CLEAN THROTTLE WITH MOTOR BODY ASSEMBLY)

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2109; Throttle...

NEXT

(1) Push open the throttle valve and wipe off any carbon from

the valve and bore using a cloth soaked in non-residue
solvent.

NOTICE:

If the throttle valve does not open smoothly, replace the throttle

with motor body assembly.

4.

READ VALUE USING TECHSTREAM (ISC LEARNING VALUE)

(a) Perform "Inspection After Repair" after cleaning or replacing the throttle with motor body assembly

.

(b) Enter the following menus: Powertrain / Engine and ECT / Data List / ISC Learning Value.

(c) Read the value.

OK:

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2109; Throttle...

Perform "Inspection After Repair" after replacing the throttle with motor body assembly

.

NG

REPLACE THROTTLE WITH MOTOR BODY

ASSEMBLY

OK

END

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2109; Throttle...