Nissan Skyline R34 workshop service manual page 37

text version of content this owner's manual page from owners manual to the vehicle Nissan Skyline, year of production 1998 - 2002:

TROUBLE DIAGNOSES Symptom Matrix Chart (Cont'd) Sensor-related problems I Symptom characteristics and ins~ection hints Open Engine will not start when either REF signal circuit or POS signal circuit is open. Crankshaft position sensor Neither fuel system nor ignition system outputs control signals. (POS, REF) Instanta- Symptoms vary with the break time and the vehicle's driving conditions. Light neous break shock or surging will occur while the vehicle is being driven, and the engine will stall at idle speed. Ring gear crankshaft position Open No airfluel ratio compensation is carried out during lean bum status. Drivability sensor [RB20DE (UB)] may be affected. Open Enters fail-safe mode. Driving under 2,400 rpm is allowed. High output Airlfuel ratio becomes rich. Black smoke may be noted. Poor contact at the Signal ground could be the cause. Mass air flow sensor Aidfuel ratio becomes lean. Dirty hot wire or air entering the system could be the Low output I I cause. Open Airlfuel ratio becomes over-rich. Open Same symptom as when signal wire is open. Enters fail-safe mode. Malfunction indicator lamp comes ON. Ordinary driving is Opedshort allowed. Problems tend to occur when engine is cold or engine coolant tempera- Engine coolant temperature sen- ture is high. sor High resis- Detects low engine coolant temperature. Problems tend to occur after engine tance warm-up. Low resis- Detects high engine coolant temperature. Problems tend to occur when engine is tance cold. Heated oxygen sensor Opedshort Base aidfuel ratio is used. lgnition timing is retarded within the knock control range. Lack of power may be OpedShort I noted. Knock sensor lgnition timing is retarded within the knock control range. Lack of power may be High Output (noted. Low output 1 lgnition timing may not be retarded when knock is detected. Vehicle speed sensor Opedshort Fuel cut time becomes-shorter, or no fuel cut is observed. Opedshort Base idle speed is used. Fuel injection is not increased during acceleration. AIT shift point changes for AfF vehicles. Throttle position sensor Unstable out- Unnecessary cut-in fuel injection could be the cause. Poor contact at the ground put or control unit could be the cause. Poor adjust- ldle judgment is "OFF while idling. Condition returns normal by turning the igni- ment tion switch ON and OFF repeatedly. Turbo pressure sensor (TE) Open Turbo pressure is judged zero. No remarkable malfunction will be detected. Refrigerant pressure is judged high. ldle speed remains high while the air condi- Refrigerant pressure sensor tioner is ON. Short Refrigerant pressure is judged low. ldle speed remains low while the air condi- tioner is ON. lgnition switch (IGN) Open Engine will not start because neither fuel system nor ignition system outputs con- trol signals. lgnition switch (START) Open Engine starts in normal condition. Engine may not start when temperature is extremefy low. Air conditioner switch Air conditioner will not operate. No other malfunction will be noted. Open Park/neutral position switch is judged "OFF. Target engine speed for cold engine in N or P position is reduced. Parklneutral position switch ParWneutral position switch is judged "0N"I Fast Jdle is effective when the engine Short is cold and the gear is in other than N and P posrtlons. Vehrcle excessrvely creeps. Engine may stall when the steering wheel is turned while the vehicle is standstill Open and the accelerator pedal is lightly pressed, or when the steering wheel is turned Power steering oil pressure during deceleration. ' - -- switch Short Power steering switch is judged 'ON." Value will be compensated constantly. Electrical load switch Open Idle speed drops so that the engine can stall when electrical load is applied. Multiplex communication line Open/short Torque reduction control is not performed. Therefore, shift shock becomes greater. - -- -- -- -- Control unit power supply Open Engine will not start because neither fuel system nor ignition system outputs con- trol signals. - -- - - --- - - - - - I Same symptoms as when sensor harness is open. Sensor ground O~edshort -- - - -- - - - - - -- -- Poor contact In case of poor contact, the connector fitting may be loose. In case of water Control unit and connector Water intru- intrusion, the engine stalls and become inoperative for a while. The engine may sion restart soon in some cases.

owners manual Nissan Skyline

owners manual Nissan Skyline - year of production: 1998, 1999, 2000, 2001, 2002 - Nissan Skyline R34 workshop service manual EN