DTC P0122 / P0123
Precautions: General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
P0122: Throttle / Pedal Position Sensor / Switch “A” Circuit Low Output voltage of TP sensor (main) signal circuit is lower than 0.20 V. (1 D/C detection logic) |
•TP sensor (main) and/or its circuit
•ECM |
|
P0123: Throttle / Pedal Position Sensor / Switch “A” Circuit High Output voltage of TP sensor (main) signal circuit is higher than 4.81 V. (1 D/C detection logic) |
Circuit Diagram
| [A]: | ECM connector (View: [a]) | B3: | TP sensor (sub) signal circuit | 4. | Throttle actuator |
| A1: | Throttle actuator control circuit (close) | B4: | TP sensor ground circuit | 5. | ECM |
| A2: | Throttle actuator control circuit (open) | 1. | Electric throttle body assembly | 6. | Shield wire |
| B1: | TP sensor power supply circuit | 2. | TP sensor (main) | ||
| B2: | TP sensor (main) signal circuit | 3. | TP sensor (sub) |
DTC Confirmation Procedure
NOTE:
Check that the following DTCs are not detected in this “DTC Confirmation Procedure”.
•System voltage (P0560, P0562 and P0563)
1)Set ignition “ON” for 10 sec.
2)Keep accelerator pedal at fully depressed position for 2 sec.
3)Release accelerator pedal for 2 sec.
4)Repeat Step 2) – 3) 3 times.
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Was “Engine and Emission Control System Check” performed?
|
Go to Step 2.
|
|
| 2 |
TP sensor power supply circuit check
1)With ignition “OFF”, disconnect electric throttle body assembly connector.
2)Check for proper terminal connection to electric throttle body assembly connector.
3)If connection is OK, set ignition “ON”.
4)Check that voltage between “B1” and “B4” is approx. 5 V.
Is check result OK?
|
Go to Step 4.
|
Go to Step 3.
|
| 3 |
TP sensor ground circuit check
1)Check that voltage between “B1” and ground is approx. 5 V.
Is check result OK?
|
Repair “B4” 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.
|
| 4 |
TP sensor (main) 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 electric throttle body assembly connector: infinity •Voltage of “B2” circuit: approx. 0 V (When ignition is “ON”) Is check result OK?
|
Go to Step 5.
|
Repair or replace defective wire harness.
|
| 5 |
TP sensor check
1)Check TP sensor referring to “TP Sensor Performance Check” under Electric Throttle Body Assembly On-Vehicle Inspection:K14C.
Is check result OK?
|
Replace ECM and recheck DTC.
|
Replace electric throttle body assembly.
|