DTC P0120-15: Throttle / Pedal Position Sensor / Switch "A" Circuit Short to Battery or Open [10/2022 - ]: Procedure
- CHECK HARNESS AND CONNECTOR (THROTTLE POSITION SENSOR - ECM)
Pre-procedure1
- Disconnect the throttle body with motor 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 Result B11-1 (VTA) - B27-108 (VTA1) Always Below 1 Ω Ω B11-4 (E2) - B27-110 (ETA) Always Below 1 Ω Ω B11-2 (VC) or B27-109 (VCTA) - Body ground and other terminals Always 10 kΩ or higher kΩ B11-1 (VTA) or B27-108 (VTA1) - Body ground and other terminals Always 10 kΩ or higher kΩ Result
Proceed to OK NG
Post-procedure1
- None.
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 2
- CHECK TERMINAL VOLTAGE (POWER SOURCE OF THROTTLE POSITION SENSOR)
Pre-procedure1
- Disconnect the throttle body with motor 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 Result B11-2 (VC) - B11-4 (E2) Ignition switch ON 4.5 to 5.5 V V B11-1 (VTA) - B11-4 (E2) Ignition switch ON 3.0 to 5.0 V V Result
Proceed to OK NG
Post-procedure1
- None.
Result:
NG
REPLACE ECM. Refer to REMOVAL [10/2022 - ]
Result:
OK
See step 3
- CHECK HARNESS AND CONNECTOR (RESISTANCE OF ECM)
Pre-procedure1
- Disconnect the throttle body with motor assembly connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition Result B11-2 (VC) - B11-1 (VTA) Ignition switch off 190 to 210 kΩ kΩ Result
Proceed to OK NG
Post-procedure1
- None.
Result:
NG
REPLACE ECM. Refer to REMOVAL [10/2022 - ]
Result:
OK
See step 4
- READ VALUE USING GTS (THROTTLE POSITION SENSOR NO. 1 VOLTAGE)
Pre-procedure1
- Disconnect the throttle body with motor assembly connector.
- According to the display on the GTS, read the Data List.
Powertrain > Engine > Data List
Tester Display Throttle Position Sensor No. 1 Voltage HINT:
Use the snapshot function to record the value displayed or make a note of it.
Result
Proceed to NEXT
Post-procedure1
- Turn the ignition switch off.
- Turn the GTS off.
Result:
NEXT
See step 5
- READ VALUE USING GTS (THROTTLE POSITION SENSOR NO. 1 VOLTAGE)
Pre-procedure1
- Connect terminals 4 (E2) and 1 (VTA) of the throttle body with motor assembly connector on the wire harness side.NOTE:
If the VTA terminal voltage or the resistance between VTA and E2 is abnormal and terminals 1 (VTA) and 4 (E2) of the throttle body with motor assembly connector are connected, excessive current may flow through the circuit. In this case, do not connect the terminals.
- Compare the vehicle of the Data List item Throttle Position Sensor No. 1 Voltage after the circuit is shorted to the value when the throttle body with motor assembly connector was connected.
Powertrain > Engine > Data List
Tester Display Throttle Position Sensor No. 1 Voltage Result
Result Proceed to Changes from higher than 4.535 V to less than 0.56 V A Does not change from higher than 4.535 V B
Post-procedure1
- None.
Result:
A
REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY. Refer to REMOVAL [10/2022 - ]
Result:
B
REPLACE ECM. Refer to REMOVAL [10/2022 - ]
- Connect terminals 4 (E2) and 1 (VTA) of the throttle body with motor assembly connector on the wire harness side.