DTC P0123: Inspection

TP Sensor A Inspection 

NOTE:  Since there is no direct method to test the component itself, troubleshooting is performed on the related components.

Test Procedure 

Unit output voltage inspection

• Preparation
  • Throttle body connector (6P): disconnected

• Procedure
  • Jump the throttle body connector (6P) terminals No. 6 and No. 3 with a jumper wire.
  • Turn the vehicle to the ON mode.
  • Confirm the HDS [TP Sensor A].

	(Disconnected) Throttle body connector (6P) female terminals
	Courtesy of HONDA, U.S.A., INC.

• Normal Conditions
  • HDS [TP Sensor A] value is about 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.

THL1, SG3, VCC3 Circuit Inspection 

NOTICE:  

Before disconnecting the PCM connector, jump the SCS line with the HDS, and wait more than 1 minute.

Test Procedure 

• Preparation
  • Throttle body connector (6P): disconnected
  • PCM connector E (114P): disconnected
• Procedure
  • Perform the inspection according to the following chart.

			(Disconnected) Throttle body connector (6P) female terminals	(Disconnected) PCM connector E (114P) female terminals
		IG Mode	Courtesy of HONDA, U.S.A., INC.	Courtesy of HONDA, U.S.A., INC.	Normal Conditions
	THL1 open wire inspection	OFF			There is less than 1 Ω
	SG3 open wire inspection	OFF			There is less than 1 Ω
	VCC3, THL1 shorted wire to wire inspection	OFF			There is more than 1 MΩ
	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 power inspection	ON			Not shorted

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.