Toyota Tundra (2015 year). Manual — part 1645
RESULT
PROCEED TO
P2120, P2122, P2123, P2125, P2127, P2128, and/or P2138 are output
A
No DTC is output
B
B
SYSTEM OK
A
REPLACE ECM
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2120,P212...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000000PFZ0WTX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 3UR-FBE 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
NO.
DTC DETECTION CONDITION
TROUBLE AREA
P2121
Difference between VPA and VPA2 is less than 0.4 V,
1.
Difference between VPA and VPA2 is more than or
equal to the specified value.
2.
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 stored
P2120, P2122, P2123, P2125, P2127, P2128, P2138 (Accelerator
pedal position sensor)
-
1. Ignition switch
ON
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2121; Throt...
2. Throttle actuator power
ON
Case 2
VPA2 voltage
Less than 4.84 V
1. VPA voltage - Learned VPA accelerator off position voltage
0.04 V or more
2. 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)
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.
Wait for 5 seconds after turning the ignition switch to ON.
6.
Operate the accelerator pedal in accordance with the following procedure [B].
Enter the following menus: Powertrain / Engine and ECT / Data List / Accel Sens. No. 1
Volt %, and Accel Sens. No.2 Volt %.
a.
Slowly depress the accelerator pedal until Accel Sens. No.1 Volt % is approximately
30% and Accel Sens. No.2 Volt % is approximately 46%, and then slowly release the
b.
7.
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2121; Throt...
accelerator pedal.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [C].
8.
Read the pending DTC.
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.
12.
If the judgment result shows INCOMPLETE or N/A, perform steps [B] through [C] 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
mode. In limp mode, the functioning circuit is used to calculate the accelerator pedal opening angle to allow
If a pass condition is detected and then the ignition switch is turned off, the fail-safe operation stops and the
system returns to a normal condition.
WIRING DIAGRAM
Refer to DTC P2120
.
INSPECTION PROCEDURE
HINT:
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2121; Throt...
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