DTC P0120-15: Throttle / Pedal Position Sensor / Switch "A" Circuit Short to Battery or Open [12/2023 - ]: Procedure

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
  C73-6 (VTA) - C86-122 (VTA1)	Always	Below 1 Ω	Ω
  C73-3 (E2) - C86-120 (ETA)	Always	Below 1 Ω	Ω
  C73-5 (VC) or C86-121 (VCTA) - Body ground and other terminals	Always	10 kΩ or higher	kΩ
  C73-6 (VTA) or C86-122 (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

Pre-procedure1

• Disconnect the throttle body with motor assembly connector.
• Turn the ignition switch ON.

• Measure the voltage according to the value(s) in the table below.

  Standard Voltage

  Tester Connection	Condition	Specified Condition	Result
  C73-5 (VC) - C73-3 (E2)	Ignition switch ON	4.5 to 5.5 V	V
  C73-6 (VTA) - C73-3 (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 [12/2023 - ] 

Result: 

OK 

See step  3

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
  C73-5 (VC) - C73-6 (VTA)	Ignition switch off	190 to 210 kΩ	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None.

Result: 

NG 

REPLACE ECM. Refer to  REMOVAL [12/2023 - ] 

Result: 

OK 

See step  4

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.

• Turn the ignition switch off.
• Turn the GTS off.
• Connect terminals 3 (E2) and 6 (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 3 (E2) and 6 (VTA) 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.

  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 [12/2023 - ] 

Result: 

B 

REPLACE ECM. Refer to  REMOVAL [12/2023 - ]