Toyota Tundra (2015 year). Manual — part 1130
MONITOR DESCRIPTION
The ECM uses the Throttle Position (TP) sensor to monitor the throttle valve opening angle. There are several
A specific voltage difference is expected between the sensor terminals, VTA1 and VTA2, for each
throttle valve opening angle. If the difference between VTA1 and VTA2 is incorrect, the ECM interprets
this as a malfunction in the sensor, and stores a DTC.
VTA1 and VTA2 each have a specific voltage range. If VTA1 or VTA2 is outside the normal operating
range, the ECM interprets this as a malfunction in the sensor, and stores a DTC.
If the malfunction is not repaired successfully, a DTC is stored 10 seconds after the engine is next started.
P0121
This sensor transmits two signals: VTA1 and VTA2. VTA1 is used to detect the throttle opening angle and
VTA2 is used to detect malfunctions in VTA1. The ECM performs several checks to confirm proper operation
VTA1 and VTA2. If the output voltage difference between the two signals deviates from the normal
If the malfunction is not repaired successfully, the DTC is stored 2 seconds after the engine is next
started.
MONITOR STRATEGY
Related DTCs
P0120: Throttle position sensor 1 range check (Fluctuating)
P0121: TP sensor rationality
P0122: Throttle position sensor 1 range check (Low voltage)
P0123: Throttle position sensor 1 range check (High voltage)
P0220: Throttle position sensor 2 range check (Fluctuating)
P0222: Throttle position sensor 2 range check (Low voltage)
P0223: Throttle position sensor 2 range check (High voltage)
P2135: Throttle position sensor range check (Correlation)
Required Sensors/Components (Main)
Throttle position sensor
Required Sensors/Components (Related)
-
Duration
2 seconds: P0120, P0121, P0122, P0123, P0220, P0222 and P0223
0.5 seconds: P2135 Case 1
0.4 seconds: P2135 Case 2
MIL Operation
Immediate
TYPICAL ENABLING CONDITIONS
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0120-P0123,...
P0120, P0122, P0123, P0220, P0222, P0223 and P2135
Monitor runs whenever following DTCs not present
None
A. Ignition switch ON
0.012 seconds or more
B. Electronic throttle actuator power
ON
P0121
Monitor runs whenever following DTCs not
present
P0120, P0122, P0123, P0220, P0222, P0223, P2135 (Throttle
position sensor)
A. Ignition switch
ON
B. Electronic throttle actuator power
ON
TYPICAL MALFUNCTION THRESHOLDS
P0120
VTA1 voltage
0.2 V or less, or 4.535 V or more
P0121
When either condition below is met:
-
P0122
VTA1 voltage
0.2 V or less
P0123
VTA1 voltage
4.535 V or higher
P0220
A. VTA2 voltage
1.75 V or less
VTA2 voltage
4.8 V or higher
VTA1 voltage
0.2 to 2.02 V
P0222
VTA2 voltage
1.75 V or less
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0120-P0123,...
P0223
VTA2 voltage
4.8 V or higher
VTA1 voltage
0.2 to 2.02 V
P2135 Case 1
Difference between VTA1 and VTA2 voltages
0.02 V or less
P2135 Case 2
VTA1 voltage
0.2 V or less
VTA2 voltage
1.75 V or less
COMPONENT OPERATING RANGE
VTA1 voltage
0.2 to 4.54 V
VTA2 voltage
1.75 to 4.8 V
Difference between VTA1 and VTA2 voltages
Higher than 0.02 V
CONFIRMATION DRIVING PATTERN
Connect the Techstream to the DLC3.
1.
Turn the ignition switch to ON and turn the Techstream on.
2.
Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).
3.
Turn the ignition switch off and wait for at least 30 seconds.
4.
Turn the ignition switch to ON and turn the Techstream on [A].
5.
Start the engine.
6.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0120-P0123,...
With the vehicle stationary, fully depress and release the accelerator pedal [B].
7.
Idle the engine for 2 seconds or more [C].
8.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [D].
9.
Read the pending DTCs.
HINT:
If a pending DTC is output, the system is malfunctioning.
If a pending DTC is not output, perform the following procedure.
10.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
11.
Input the DTC: P0120, P0121, P0122, P0123, P0220, P0222, P0223 or P2135.
12.
Check the DTC judgment result.
TESTER
DISPLAY
DESCRIPTION
NORMAL
DTC judgment completed
System normal
ABNORMAL
DTC judgment completed
System abnormal
INCOMPLETE
DTC judgment not completed
Perform driving pattern after confirming DTC enabling conditions
N/A
Unable to perform DTC judgment
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 [D] again.
13.
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
throttle 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
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0120-P0123,...
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