Toyota Tundra (2015 year). Manual — part 2005
HINT:
If the judgment result shows ABNORMAL, the system has a malfunction.
If the judgment result shows INCOMPLETE or N/A, perform steps [B] through [C] again.
If no pending DTC is output, perform a universal trip and check for permanent DTCs
.
HINT:
If a permanent DTC is output, the system is malfunctioning.
If no permanent DTC is output, the system is normal.
14.
FAIL-SAFE
actuator, and the throttle valve is returned to a 7° throttle angle by the return spring. The ECM then adjusts
the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing, in accordance with
the accelerator pedal opening angle, to allow the vehicle to continue at a minimal speed. If the accelerator
pedal is depressed firmly and gently, the vehicle can be driven slowly.
Fail-safe mode continues until a pass condition is detected, and the ignition switch is then turned OFF.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the Techstream. Freeze frame data records the engine condition when
malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle
was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and
other data from the time the malfunction occurred.
The throttle actuator current (Throttle Motor Current) and the throttle actuator duty ratio (Throttle
Motor Open Duty / Throttle Motor Close Duty) can be read using the Techstream. However, the ECM
shuts off the throttle actuator current when the ETCS malfunctions.
PROCEDURE
1.
INSPECT THROTTLE BODY (RESISTANCE OF THROTTLE ACTUATOR)
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2102,P2103;...
OK
OK
OK
(a) Inspect the throttle body
.
HINT:
Perform "Inspection After Repair" after replacing the throttle body
.
NG
REPLACE THROTTLE BODY ASSEMBLY
2.
CHECK HARNESS AND CONNECTOR (THROTTLE ACTUATOR - ECM)
(a) Disconnect the D9 throttle body connector.
(b) Disconnect the D74 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
D9-2 (M+) - D74-19 (M+)
Always
Below 1 Ω
D9-1 (M-) - D74-18 (M-)
Always
Below 1 Ω
D9-2 (M+) or D74-19 (M+) - Body ground
Always
10 kΩ or higher
D9-1 (M-) or D74-18 (M-) - Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
3.
INSPECT THROTTLE BODY ASSEMBLY
(a) Check for foreign objects between the throttle valve and the housing.
OK:
No foreign objects between throttle valve and housing.
HINT:
Perform "Inspection After Repair" after replacing the throttle body
.
NG
REMOVE FOREIGN OBJECT AND CLEAN
THROTTLE BODY
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2102,P2103;...
4.
INSPECT THROTTLE VALVE
(a) Check if the throttle valve opens and closes smoothly.
OK:
Throttle valve opens and closes smoothly.
HINT:
Perform "Inspection After Repair" after replacing the throttle body assembly
.
NG
REPLACE THROTTLE BODY ASSEMBLY
OK
REPLACE ECM
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2102,P2103;...
Last Modified: 9-16-2014
6.6 C
Doc ID: X39400000RM0JZC
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 3UR-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 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 to 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-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2109; Throttle...
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