DESCRIPTION
HINT:
These DTCs relate to the accelerator pedal position sensor.
Refer to DTC P212012.
Click here
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
MIL | Note |
---|---|---|---|---|---|
P21201C | Throttle/Pedal Position Sensor/Switch "D" Circuit Voltage Out of Range |
Diagnosis condition:
Abnormal condition:
Malfunction time:
Trip logic:
Detection conditions:
Sensors/components used for detection:
|
| Comes on |
|
P212099 |
Throttle/Pedal Position Sensor/Switch "D" Exceeded Learning Limit |
Diagnosis condition:
Abnormal condition:
Malfunction time:
Trip logic:
Detection conditions:
Sensors/components used for detection:
|
| Comes on |
|
MONITOR DESCRIPTION
P21201CWhen the ignition switch is turned ON and the difference between VPA and VPA2 is greater than or equal to the specified value for 0.5 seconds or more, the ECM determines that the accelerator pedal sensor assembly circuit is malfunctioning and illuminates the MIL and stores a DTC.
P212099When the ignition switch is turned ON, the accelerator pedal is fully released and the difference in the calculated voltage of VPA and VPA2 is less than 0.4 V or more than 1.2 V, the ECM determines that the accelerator pedal sensor assembly circuit is malfunctioning and illuminates the MIL and stores a DTC.
MONITOR STRATEGY
Related DTCs | P2121: Accelerator pedal position sensor rationality |
Required Sensors/Components (Main) | Accelerator pedal sensor assembly |
Required Sensors/Components (Related) |
- |
Frequency of Operation |
Continuous |
Duration |
2 seconds: P2121 (case 1) 0.5 seconds: P2121 (case 2) |
MIL Operation | Immediate |
Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
Accelerator pedal position sensor circuit fail (P2120, P2122, P2123, P2125, P2127, P2128, P2138) (Pending / MIL) |
Not detected |
TYPICAL MALFUNCTION THRESHOLDS
P2121: (Case 1)
Difference between VPA voltage and VPA2 voltage (learned value of accelerator off position) |
Less than 0.4 V, or higher than 1.2 V |
All of the following conditions are met | - |
[(VPA voltage - Learned VPA accelerator off position voltage) - (VPA2 voltage - Learned VPA2 accelerator off position voltage)] |
0.165 V or higher (varies with accelerator position) |
VPA2 voltage | Less than 4.84 V |
Either of following conditions is met: | (a) or (b) |
(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
HINT:
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HINT:
GTS Display |
Description |
---|---|
NORMAL |
|
ABNORMAL |
|
INCOMPLETE |
|
HINT:
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
FAIL-SAFE
When these DTCs are stored, the ECM enters fail-safe mode. If either of the 2 sensor circuits malfunctions, the ECM limits the engine output. If both of the circuits malfunction, the ECM regards the accelerator pedal as being released. As a result, the throttle valve is closed and the engine idles.
Fail-safe mode continues until a pass condition is detected, and the ignition switch is turned off.
WIRING DIAGRAM
Refer to DTC P212012.
Click here
CAUTION / NOTICE / HINT
HINT:
Read Freeze Frame Data using the GTS. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. 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.
PROCEDURE
1. |
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P21201C OR P212099) |
(a) Read the DTCs.
Powertrain > Engine > Trouble Codes
Result | Proceed to |
---|---|
DTC P21201C or P212099 is output |
A |
DTC P21201C or P212099 and other DTCs are output |
B |
HINT:
If any DTCs other than P21201C or P212099 are output, troubleshoot those DTCs first.
B |
![]() | GO TO DTC CHART |
|
2. |
READ VALUE USING GTS (ACCELERATOR POSITION SENSOR NO. 1 VOLTAGE AND ACCELERATOR POSITION SENSOR NO. 2 VOLTAGE) |
*a | Fully Depressed |
*b | Fully Released |
(a) Enter the following menus.
Powertrain > Engine > Data List
Tester Display |
---|
Accelerator Position Sensor No.1 Voltage |
Accelerator Position Sensor No.2 Voltage |
(b) Read the value displayed on the GTS.
Standard Voltage:
Accelerator Pedal Operation |
Accelerator Position Sensor No.1 Voltage |
Accelerator Position Sensor No.2 Voltage |
Difference between Accelerator Position Sensor No.1 Voltage and Accelerator Position Sensor No.2 Voltage |
---|---|---|---|
Fully Released | 0.5 to 1.1 V |
1.2 to 2.0 V |
More than 0.02 V |
Fully Depressed | 2.6 to 4.5 V |
3.4 to 4.75 V |
OK | ![]() | CHECK FOR INTERMITTENT PROBLEMS |
NG | ![]() | REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY |