Nissan GT-R (R35) · Service Manual ENGINE

P0122, P0123, P0227, P0228 TP SENSOR

VR38

P0122 P0123 P0227 P0228

Description


Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc. The throttle position sensor responds to the throttle valve movement.

PBIB0145E.JPG
The throttle position sensor has two sensors. These sensors are a kind of potentiometers which transform the throttle valve position into output voltage, and emit the voltage signal to the ECM. In addition, these sensors detect the opening and closing speed of the throttle valve and feed the voltage signals to the ECM. The ECM judges the current opening angle of the throttle valve from these signals and the ECM controls the throttle control motor to make the throttle valve opening angle properly in response to driving condition.

DTC Logic

 
 DTC DETECTION LOGIC

NOTE：
 If DTC P0122, P0123, P0227 or P0228 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to DTC Logic (GT-R certified NISSAN dealer).

DTC No.
 		Trouble diagnosis name
 		DTC detecting condition
 		Possible cause
P0122
 		Throttle position sensor 2 (bank 1) circuit low input
 		An excessively low voltage from the TP sensor 2 is sent to ECM.
  • Harness or connectors
    (TP sensor 2 circuit is open or shorted.)
  • Electric throttle control actuator
    (TP sensor 2)
P0123
 		Throttle position sensor 2 (bank 1) circuit high input
 		An excessively high voltage from the TP sensor 2 is sent to ECM.
P0227
 		Throttle position sensor 2 (bank 2) circuit low input
 		An excessively low voltage from the TP sensor 2 is sent to ECM.
P0228
 		Throttle position sensor 2 (bank 2) circuit high input
 		An excessively high voltage from the TP sensor 2 is sent to ECM.

 
 DTC CONFIRMATION PROCEDURE

 
 1.PRECONDITIONING
 
 2.PERFORM DTC CONFIRMATION PROCEDURE

Diagnosis Procedure


 
 1.CHECK GROUND CONNECTION
 
 2.CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT-I
 
 3.CHECK THROTTLE POSITION SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT
 
 4.CHECK THROTTLE POSITION SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
 
 5.CHECK THROTTLE POSITION SENSOR
 
 6.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
 
 7.CHECK INTERMITTENT INCIDENT

Component Inspection


 
 1.CHECK THROTTLE POSITION SENSOR
 
 2.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

Special Repair Requirement


 
 1.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
 
 2.PERFORM IDLE AIR VOLUME LEARNING