DTC P2127 / P2128
Precautions: General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
P2127: Throttle / Pedal Position Sensor / Switch “E” Circuit Low Output voltage of APP sensor (sub) signal circuit is lower than 0.30 V. (1 D/C detection logic) |
•APP sensor (sub) and/or its circuit
•ECM |
|
P2128: Throttle / Pedal Position Sensor / Switch “E” Circuit High Output voltage of APP sensor (sub) signal circuit is higher than 2.50 V. (1 D/C detection logic) |
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 | 4. | ECM |
| A3: | APP sensor (main) ground circuit | 1. | APP sensor |
DTC Confirmation Procedure
NOTE:
Check that the following condition is met in this “DTC Confirmation Procedure”.
•Battery voltage > 8 V
1)Set ignition “ON” for 10 sec.
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Was “Engine and Emission Control System Check” performed?
|
Go to Step 2.
|
|
| 2 |
Accelerator pedal assembly (incorporating APP sensor) mounting check
1)Check that accelerator pedal assembly (incorporating APP sensor) has been mounted to vehicle body properly (no pinched floor carpet, etc.).
Is check result OK?
|
Go to Step 3.
|
Reinstall accelerator pedal assembly (incorporating APP sensor) properly.
|
| 3 |
APP sensor (sub) power supply circuit check
1)With ignition “OFF”, disconnect APP sensor connector.
2)Check for proper terminal connection to APP sensor connector.
3)If connection is OK, set ignition “ON”.
4)Check that voltage between “B1” and “B3” is approx. 5 V.
Is check result OK?
|
Go to Step 5.
|
Go to Step 4.
|
| 4 |
APP sensor (sub) ground circuit check
1)Check that voltage between “B1” and ground is approx. 5 V.
Is check result OK?
|
Repair “B3” circuit.
If this DTC is detected again, replace ECM and recheck DTC.
|
Repair “B1” circuit.
If this DTC is detected again, replace ECM and recheck DTC.
|
| 5 |
APP sensor (sub) signal circuit check
1)With ignition “OFF”, disconnect “C01” and “E01” connectors from ECM.
2)Check for proper terminal connection to “C01” and “E01” connectors.
3)If connections are OK, check the following points.
•Resistance of “B2” circuit: less than 1 Ω
•Resistance between “B2” circuit and ground: infinity •Resistance between “B2” circuit terminal and other terminal at APP sensor connector: infinity •Voltage of “B2” circuit: approx. 0 V (When ignition is “ON”) Is check result OK?
|
Go to Step 6.
|
Repair APP sensor (sub) signal circuit.
|
| 6 |
APP sensor check
1)Check APP sensor.
Is check result OK?
|
Replace ECM and recheck DTC.
|
Replace accelerator pedal assembly (incorporating APP sensor).
|