Nissan Juke Service and Repair Manual : Turbocharger boost control
Turbocharger boost control : SystemDiagram
Turbocharger boost control : System Description
INPUT/OUTPUT SIGNAL CHART
SYSTEM DESCRIPTION
Depending on driving conditions, the ECM performs ON/OFF duty control of the turbocharger boost control solenoid valve and controls the boost by adjusting the pressure to the diaphragm of the boost control actuator.
When driving conditions demand an increase in boost, the ECM prolongs the ON time of the turbocharger boost control solenoid valve and moves the boost control valve towards the closing direction by reducing the pressure in the diaphragm of the boost control actuator. The emission gas to the turbine wheel is then increased. When driving conditions demand a decrease in boost, the ECM shortens the ON time of the turbocharger boost control solenoid valve and moves the boost control valve towards the opening position by increasing the pressure in the diaphragm of the boost control actuator. The emission bypassing to the turbine wheel is then increased. Thus, by performing the most optimal boost control, the ECM improves engine output and response.
NOTE
:
The boost varies depending on the vehicle and driving conditions.
BOOST CONTROL ACTUATOR LINE DRAWING
1. Turbocharger
2. Boost control actuator
3. Turbocharger boost control solenoid
valve
4. Recirculation valve
5. Turbocharger boost sensor
(with intake air temperature sensor 2)
: Vehicle front
Exhaust valve timing control
Exhaust valve timing control : System Diagram
Exhaust valve timing control: System Description
INPUT/OUTPUT SIGNAL CHART
SYSTEM DESCRIPTION
This mechanism hydraulically controls cam phases c ...
Engine protection control at low engine oil pressure
Engine protection control at low engine oil pressure : System Diagram
Engine protection control at low engine oil pressure : System Description
INPUT/OUTPUT SIGNAL CHART
SYSTEM DESCRIPTION
• ...
Other materials:
B2557 vehicle speed
DTC Logic
DTC DETECTION LOGIC
NOTE:
• If DTC B2557 is displayed with DTC U1000, first perform the trouble diagnosis
for DTC U1000. Refer to
BCS-83, "DTC Logic".
• If DTC B2557 is displayed with DTC U1010, first perform the trouble diagnosis
for DTC U1010. Refer to
BCS-84, "D ...
Basic inspection
DIAGNOSIS AND REPAIR WORK FLOW
Work Flow
DESCRIPTION OF TROUBLE DIAGNOSIS FLOWCHART
DETAILS OF TROUBLE DIAGNOSIS FLOWCHART
1.OBTAIN INFORMATION ABOUT SYMPTOM
Interview the customer to obtain as much information as possible about the
conditions and environment under
which the malfunction oc ...
Diagnosis and repair work flow
Work Flow
OVERALL SEQUENCE
Reference 1··· Refer to AV-33, "MODELS WITH USB CONNECTION FUNCTION : Symptom
Table" (with USB
connection function) or AV-35, "MODELS WITHOUT USB CONNECTION FUNCTION : Symptom
Table" (without
USB connection function).
DETAILED FLOW
1.CHECK ...