Nissan GT-R (R35) · Service Manual ENGINE

P0234, P1334 TC SYSTEM

VR38

P0234 P1334

DTC Logic

 
 DTC DETECTION LOGIC

NOTE：
 If DTC P0234 or P1334 is displayed with DTC P0237, P0238, P0241 or P0242, first perform the trouble diagnosis for DTC P0237, P0238, P0241 or P0242. Refer to DTC Logic (GT-R certified NISSAN dealer).

DTC No.
 		Trouble diagnosis name
 		DTC detecting condition
 		Possible cause
P0234
 		Turbocharger overboost condition (bank 1)
 		Turbocharger boost is higher than the target value.
  • Turbocharger boost sensor
  • Turbocharger boost control solenoid valve
  • Exhaust manifold and turbocharger assembly
  • Disconnection, looseness or improper connection of boost control actuator hose
P1334
 		Turbocharger overboost condition (bank 2)

 
 DTC CONFIRMATION PROCEDURE

 
 1.PERFORM COMPONENT FUNCTION CHECK

Component Function Check


 
 1.CHECK BOOST CONTROL ACTUATOR HOSE
 
 2.PERFORM COMPONENT FUNCTION CHECK

Diagnosis Procedure


 
 1.CHECK BOOST CONTROL ACTUATOR HOSE
 
 2.CHECK TURBOCHARGER BOOST CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
 
 3.DETECT MALFUNCTIONING PART
 
 4.CHECK TURBOCHARGER BOOST CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
 
 5.CHECK TURBOCHARGER BOOST CONTROL SOLENOID VALVE
 
 6.CHECK BOOST CONTROL ACTUATOR
 
 7.CHECK TURBOCHARGER BOOST SENSOR
 
 8.CHECK INTERMITTENT INCIDENT