DTC P0121: Inspection

TP Sensor Inspection 

Test Procedure 

• Preparation
  1. -

     Throttle body connector (6P): disconnected

• Procedure
  1. -

     Perform the inspection according to the following chart.

			(Disconnected) Throttle body connector (6P) female terminals
		IG Mode	Courtesy of HONDA, U.S.A., INC.	Normal Conditions
	Unit output voltage inspection	ON		About 5.0 V
	Unit output voltage inspection	ON		About 5.0 V

Results 

• If it is normal, there is a problem with the throttle body.
• If it is abnormal, there is a problem with other related components.

VCC3(DBW), THL1, SG3(DBW) Circuit Inspection 

Test Procedure 

• Preparation
  1. -

     Throttle body connector (6P): disconnected

  2. -

     PCM connector E (80P): disconnected

• Procedure
  1. -

     Perform the inspection according to the following chart.

			(Disconnected) Throttle body connector (6P) female terminals	(Disconnected) PCM connector E (80P) female terminals
		IG Mode	Courtesy of HONDA, U.S.A., INC.	Courtesy of HONDA, U.S.A., INC.	Normal Conditions
	VCC3(DBW) open wire inspection	OFF			There is less than 1 Ohm
	THL1 open wire inspection	OFF			There is less than 1 Ohm
	SG3(DBW) open wire inspection	OFF			There is less than 1 Ohm
	Refer to the Open/Shorted Wire Inspection Description for the method to inspect the shorted circuit below, then start to inspect according to circumstances.
	THL1 shorted to ground inspection	OFF			There is more than 1 MOhm

Results 

• If abnormal, there is a problem in the circuit.

PCM Inspection 

Test Procedure 

• If the other inspection item(s) indicated a normal condition, then it is determined that the remaining PCM is the cause.

Results 

• There is a problem with the PCM.