Diagnosis Procedure

With CONSULT-III 

1. Turn ignition switch ON.
2. Select "EXH V/T ANGLE" in "ACTIVE TEST" mode with CONSULT-III.
3. Start engine and keep the engine speed at 2, 500 rpm, then touch "START".
4. Check that the values of "EXH/V TIM B1" and "EXH/V TIM B2" change when touching "UP" or "DOWN".

Without CONSULT-III 

1. Start engine and rev engine up above 1, 500 rpm.
2. Read the voltage signal between ECM harness connector terminals as follows with an oscilloscope.
   VOLTAGE SPECIFICATIONS
   
   

   ECM				Voltage signal
   +		-
   Connector	Terminal	Connector	Terminal
   F101	6 [EVT control magnet retarder (bank 1) signal]	M107	128	Courtesy of NISSAN MOTOR CO., U.S.A.
   	7 [EVT control magnet retarder (bank 2) signal]

Is the inspection result normal? 

YES: GO TO  10.

NO: GO TO 2.

Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO  4.

NO: GO TO 3.

1. Replace malfunctioning exhaust valve timing control magnet retarder.
2. Perform "EXHAUST VALVE TIMING CONTROL LEARNING : SPECIAL REPAIR REQUIREMENT ".

   INSPECTION END

Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 5.

NO: Replace malfunctioning exhaust valve timing control position sensor.

Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 6.

NO: Replace crankshaft position sensor (POS).

Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 7.

NO: Replace malfunctioning camshaft position sensor (PHASE).

Check the following.

• Accumulation of debris to the signal plate of camshaft rear end
• Chipping signal plate of camshaft rear end

Fig 1: Checking Camshaft (EXH)

Courtesy of NISSAN MOTOR CO., U.S.A.

Is the inspection result normal? 

YES: GO TO 8.

NO: Remove debris and clean the signal plate of camshaft rear end or replace camshaft.

Check service records for any recent repairs that may cause timing chain misaligned.

Are there any service records that may cause timing chain misaligned? 

YES: Check timing chain installation. Refer to "REMOVAL AND INSTALLATION ".

NO: GO TO 9.

1. Replace exhaust valve timing control pulley assembly and exhaust valve timing control magnet retarder.

   Refer to "REMOVAL AND INSTALLATION " and "REMOVAL AND INSTALLATION ".

2. Perform "EXHAUST VALVE TIMING CONTROL LEARNING : SPECIAL REPAIR REQUIREMENT ".

   INSPECTION END

Refer to "INTERMITTENT INCIDENT ".

INSPECTION END