DTC P0120
Precautions: General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detection condition | Trouble area |
|---|---|
|
P0120: Throttle / Pedal Position Sensor / Switch “A” Circuit Any of the following conditions is met.
•Measured voltage of APP sensor (main) signal circuit is higher than specified value. (1 D/C detection logic)•Measured voltage of APP sensor (main) signal circuit is lower than specified value. |
•APP sensor and/or its circuit
•ECM |
Circuit Diagram
| [A]: | ECM connector (View: [a]) | B1: | APP sensor (sub) power supply circuit | 2 | APP sensor (main) |
| A1: | APP sensor (main) power supply circuit | B2: | APP sensor (sub) signal circuit | 3 | APP sensor (sub) |
| A2: | APP sensor (main) signal circuit | B3: | APP sensor (sub) ground circuit | ||
| A3: | APP sensor (main) ground circuit | 1 | ECM |
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Was “Engine and Emission Control System Check” performed?
|
Go to Step 2.
|
|
| 2 |
APP sensor (main) power supply circuit, signal circuit and ground circuit check
1)Check “A1”, “A2” and “A3” circuits according to Step 3 – 6 of Accelerator Pedal Check:D16AA.
Is check result OK?
|
Go to Step 3.
|
Repair or replace defective wire harness.
|
| 3 |
APP sensor (main) check
1)Check APP sensor (main).
Is check result OK?
|
Replace ECM and recheck DTC.
|
Replace accelerator pedal assembly (incorporating APP sensor).
|