Toyota Tundra (2015 year). Manual — part 2014
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000000PFZ0WUX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2121; Throttle / Pedal Position Sensor / Switch "D"
Circuit Range / Performance; 2015 MY Tundra [08/2014 - ]
DTC
P2121
Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance
DESCRIPTION
HINT:
Refer to DTC P2120
.
DTC
CODE
DTC DETECTION CONDITION
TROUBLE AREA
P2121
Either conditions (1) or (2) met for 0.5 seconds (1 trip
detection logic):
(1) Difference between VPA and VPA2 is less than 0.4 V, or
to the specified value.
Accelerator Pedal
Position (APP) sensor
ECM
MONITOR DESCRIPTION
the DTC is stored.
MONITOR STRATEGY
Related DTCs
P2121: APP sensor rationality
Required Sensors/Components (Main)
APP sensor
Required Sensors/Components (Related)
-
Duration
-: Case 1
0.5 seconds: Case 2
MIL Operation
Immediate
TYPICAL ENABLING CONDITIONS
ALL (Case 1 and Case 2)
Monitor runs whenever following DTCs
not present
P2120, P2122, P2123, P2125, P2127, P2128, P2138 (Accelerator
Pedal Position sensor)
-
1. Ignition switch
ON
2. Throttle actuator power
ON
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2121; Throttle...
Case 2
VPA2 voltage
Less than 4.84 V
a) VPA voltage - Learned VPA accelerator off position voltage
0.04 V or more
b) VPA2 voltage - Learned VPA2 accelerator off position voltage
0.04 V or more
TYPICAL MALFUNCTION THRESHOLDS
Case 1
Difference between VPA voltage and VPA2 voltage (learned value of
accelerator off position)
Less than 0.4 V, or more than
1.2 V
Case 2
(VPA voltage - Learned VPA accelerator off position voltage) - (VPA2
voltage - Learned VPA2 accelerator off position voltage)
0.165 V or more (varies with
accelerator position)
VPA2 voltage
Less than 4.84 V
(a) VPA voltage - Learned VPA accelerator off position voltage
0.04 V or higher
(b) VPA2 voltage - Learned VPA2 accelerator off position voltage
0.04 V or higher
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.
Fully depress and release the accelerator pedal [B].
6.
Check that 20 seconds or more have elapsed since the DTCs were cleared.
7.
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2121; Throttle...
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [C].
8.
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.
9.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
10.
Input the DTC: P2121.
11.
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] and [C] again.
12.
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.
13.
FAIL-SAFE
idles.
Fail-safe mode continues until a pass condition is detected, and the ignition switch is turned off.
WIRING DIAGRAM
Refer to DTC P2120
.
INSPECTION PROCEDURE
HINT:
This DTC relates to the Accelerator Pedal Position (APP) sensor.
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
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2121; Throttle...
A
other data from the time the malfunction occurred.
PROCEDURE
1.
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2121)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(e) Read DTCs.
Result
RESULT
PROCEED TO
P2121 is output
A
P2121 and other DTCs are output
B
HINT:
If any DTCs other than P2121 are output, troubleshoot those DTCs first.
B
GO TO DTC CHART
2.
READ VALUE USING TECHSTREAM (ACCELERATOR POSITION SENSOR)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON and turn the Techstream
on.
(c) Enter the following menus: Powertrain / Engine and ECT
/ Data List / ETCS / Accel Sensor Out No. 1 and Accel
Sensor Out No. 2.
(d) Read the values displayed on the Techstream.
Standard voltage:
ACCELERATOR PEDAL
OPERATIONS
ACCEL SENSOR
OUT NO. 1
ACCEL SENSOR
OUT NO. 2
Released
0.5 to 1.1 V
1.2 to 2.0 V
Depressed
2.6 to 4.5 V
3.4 to 4.75 V
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2121; Throttle...
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