Nissan Sentra B18 (2020-2025) Service Manual: P052b Intake Valve Timing Control

Nissan Sentra B18 (2020-2025) Service Manual / Engine / Work Procedure (After Replacing Electric Throttle Control Actuator) / Dtc/circuit Diagnosis / P052b Intake Valve Timing Control

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detecting condition
P052B	CAMSHAFT POSITION TIMING B1 (Cold start “A” camshaft position timing over-retarded bank 1)	There is a gap between angle of target and phase-control angle degree when the engine is in a cold condition.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P052B

CAMSHAFT POSITION TIMING B1

(Cold start “A” camshaft position timing over-retarded bank 1)

There is a gap between angle of target and phase-control angle degree when the engine is in a cold condition.

POSSIBLE CAUSE

Crankshaft position sensor
Intake camshaft position sensor
Intake valve timing control actuator
Accumulation of debris to the signal pick-up portion of the camshaft
Timing chain installation
Foreign matter caught in the oil groove for intake valve timing control

FAIL-SAFE

Engine Control System

Engine operating condition in fail-safe mode
Fail safe mode		Nissan Sentra Vehicle behavior
Device fix mode		This mode fixes the electric IVT motor and the EVT control solenoid valve in the reference position. The intake manifold runner control valve motor is turned OFF (intake manifold runner control valve opens).
Others		ECM stops the electric valve timing control. (The camshaft returns to the position of most retard angle.)

Idle Start/Stop System

When a DTC is detected, the start/stop indicator lamp blinks slowly and the idle start/stop system operation is prohibited.

When ECM detects error while operating the idle start/stop system, ECM restarts the engine.

Confirmation Procedure

Confirmation Procedure

PRECONDITIONING

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is 10 V or more at idle.

With CONSULT
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON.
5. On the CONSULT screen, select “ENGINE” >> “DATA MONITOR” >> “COOLAN TEMP/S”.
6. Check “COOLAN TEMP/S” indication value.
With GST

Follow the procedure “With CONSULT” above.

Is the value of “COOLAN TEMP/S”−5°C (23°F) and 45°C (113°F)?
YES >>
GO TO 2.
NO-1 [if it is below −5°C (23°F)] >>
Warm up the engine until the value of “COOLAN TEMP/S” indicates −5°C (23°F) and 45°C (113°F). And then GO TO 2.
NO-2 [if it is above 45°C (113°F)] >>
Cool the engine down to the value of “COOLAN TEMP/S” indicates −5°C (23°F) and 45°C (113°F). And then GO TO 2.
PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch OFF and wait at 10 seconds.
2. Turn ignition switch ON.
3. Set the selector lever in N range.
4. Start the engine and let it idle for 20 seconds or more.
5. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >>
Refer to DTC Diagnosis Procedure.
NO >>
INSPECTION END

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

INSPECTION START

With CONSULT>>
GO TO 2.
Without CONSULT>>
GO TO 3.

CHECK VTC POSITION

With CONSULT

Turn ignition switch ON.
On the CONSULT screen, select “ENGINE” >> “DATA MONITOR” >> “COOLAN TEMP/S”.
Check that the “COOLAN TEMP/S” indication value is between −5°C (23°F) and 45°C (113°F).
Start engine and wait at least 5 seconds.
On the CONSULT screen, select “ENGINE” >> “DATA MONITOR” >> “INT/V TIM (B1)”.

Check that the data monitor item indicates as follows:

Item	Value (°CA)
INT/V TIM (B1)	10 ± 2

Is the inspection result normal?

YES >>

GO TO 10.

NO >>

GO TO 3.

CHECK OIL PRESSURE WARNING LAMP
1. Start engine.
2. Check that oil pressure warning lamp is not illuminated.
Is oil pressure warning lamp illuminated?
YES >>
Refer to Inspection.
NO >>
GO TO 4.
CHECK INTAKE VALVE TIMING CONTROL ACTUATOR

Perform Component Inspection of the intake valve timing intermediate lock control actuator. Refer to DTC Diagnosis Procedure.

Is the inspection result normal?
YES >>
GO TO 5.
NO >>
Repair or replace error-detected parts.
CHECK CRANKSHAFT POSITION SENSOR

Perform Component Inspection of the crankshaft position sensor. Refer to Component Inspection.

Is the inspection result normal?
YES >>
GO TO 6.
NO >>
Repair or replace error-detected parts.
CHECK INTAKE CAMSHAFT POSITION SENSOR

Perform Component Inspection of the intake camshaft position sensor. Refer to Component Inspection.

Is the inspection result normal?
YES >>
GO TO 7.
NO >>
Repair or replace error-detected parts.
CHECK CAMSHAFT (INTAKE)

Check the following.
1. Accumulation of debris on the signal plate of camshaft front end
2. Chipping signal plate of camshaft front end
Is the inspection result normal?
YES >>
GO TO 8.
NO >>
Remove debris and clean the signal plate of camshaft front end or replace camshaft. Refer to Removal and Installation.
CHECK TIMING CHAIN INSTALLATION

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

Are there any service records that may cause timing chain misalignment?
YES >>
Check timing chain installation. Refer to Removal and Installation.
NO >>
GO TO 9.
CHECK LUBRICATION CIRCUIT

Perform “Inspection of Camshaft Sprocket (INT) Oil Groove”. Refer to Inspection.

Is the inspection result normal?
YES >>
GO TO 10.
NO >>
Clean lubrication line.
CHECK INTERMITTENT INCIDENT

Refer to Intermittent Incident.

>>
INSPECTION END

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