NR Series ENGINE CONTROL SFI SYSTEM P212512 Throttle/Pedal Position Sensor/Switch "E" Circuit Short to Battery
DESCRIPTION
- HINT:
-
These DTCs relate to the accelerator pedal position sensor.
Refer to DTC P212012.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P212512 | Throttle/Pedal Position Sensor/Switch "E" Circuit Short to Battery | Diagnosis Condition:
·
Ignition switch ON Abnormal condition: ·
Both of the following conditions are met -
VPA2 is 4.8 V or higher. -
VPA is between 0.4 V and 3.45 V. Malfunction Time: ·
2 seconds or more Trip logic: ·
1 trip detection logic Detection Conditions: ·
Continuous Sensors/components used for detection: ·
Accelerator pedal sensor assembly |
·
Accelerator pedal sensor assembly ·
Open in EPA2 circuit ·
Short in VPA2 circuit ·
ECM |
Comes on | DTC stored | SAE Code: P2128 |
MONITOR DESCRIPTION
When the ignition switch is turned to ON, the voltage of VPA is between 0.4 V and 3.45 V and the voltage of VPA2 is 4.8 V or more for 2 seconds or more, the ECM determines that the accelerator pedal sensor assembly circuit is malfunctioning and illuminates the MIL and stores a DTC.
MONITOR STRATEGY
| Required Sensors/Components | Accelerator pedal sensor assembly |
| Frequency of Operation | Continuous |
CONFIRMATION DRIVING PATTERN
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
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
| *a | Front view of wire harness connector
(to Accelerator Pedal Sensor Assembly) |
- HINT:
-
Make sure that the connector is properly connected. If it is not, securely connect it and check for DTCs again.
Disconnect the accelerator pedal sensor assembly connector.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition A54-3 (VPA2) - Body ground Ignition switch ON Below 1 V
- HINT:
-
If the value differs from standard, there may be a short in the power source circuit.
- Result:
Proceed to OK NG
OK
NG
Disconnect the accelerator pedal sensor assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition A54-2 (EPA2) - Body ground Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Disconnect the accelerator pedal sensor assembly connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition A54-2 (EPA2) - A46-51 (EPA2) Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Disconnect the accelerator pedal sensor assembly connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition A54-3 (VPA2) or A46-50 (VPA2) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG