Toyota Tundra (2015 year). Manual — part 1637
Last Modified: 9-16-2014
6.6 C
Doc ID: X39400000RM0JYC
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 3UR-FBE 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 body
assembly
HINT:
If there are deposits in the throttle valve, a decrease in the ISC flow rate may cause engine stall or 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
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
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
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2109; Throt...
A
NEXT
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 BODY ASSEMBLY)
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2109; Throt...
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 body assembly.
4.
READ VALUE USING TECHSTREAM (ISC LEARNING VALUE)
(a) Remove the EFI NO. 1 and ETCS fuses at the same time, wait 60 seconds or more, and then
reinstall the fuses to reset the ISC learning value.
(b) Start the engine and fully warm it up.
(c) Leave the vehicle idling for 3 minutes or more and check that the engine speed is at the
standard idling speed.
HINT:
Check the freeze frame data and make sure that the vehicle conditions are the same as when the DTC
was stored.
(d) Using the Techstream, confirm "ISC Learning Value".
OK:
NG
REPLACE THROTTLE BODY ASSEMBLY
OK
END
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2109; Throt...
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