Nissan Sentra B18 (2020-2025) Service Manual / Engine / Work Procedure (After Replacing Electric Throttle Control Actuator) / Dtc/circuit Diagnosis / P062b Ecm

Nissan Sentra B18 (2020-2025) Service Manual: P062b Ecm

Dtc Description

DTC Description

This DTC is detected when the ECM-integrated injector driver unit has a malfunction.

DTC DETECTION LOGIC

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P062B	ECM (Internal control module fuel injector control performance)	Diagnosis condition	Engine running at idle
		Signal (terminal)	—
		Threshold	Injector driver unit is malfunctioning
		Diagnosis delay time	—

POSSIBLE CAUSE

Harness or connectors (Fuel injector circuit is open or shorted.)
Battery power supply
ECM (Injector driver unit)

FAIL-SAFE

Engine Control System

Engine operating condition in fail-safe mode
Fail safe mode		Nissan Sentra Vehicle behavior
Traveling control mode	Accelerator angle variation control	ECM controls the accelerator pedal depression speed to make it slower than actual speed. This causes a drop in accelerating performance and encourages the driver to repair malfunction. Note: ECM does not control the accelerator pedal releasing speed.
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).
Combustion control mode	Stratified charge combustion control at starting	No stratified charge combustion at starting (cold start).
Others		Note: Fail-safe mode may not start depending on malfunction type of ECM.

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
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.
TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.

>>
GO TO 2.
PERFORM DTC CONFIRMATION PROCEDURE
1. Start the engine and keep the engine speed at idle for 30 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >>
Proceed to DTC Diagnosis Procedure.
NO >>
INSPECTION END

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

CHECK FUEL INJECTOR

Check fuel injector. Refer to Component Function Check.

Is inspection result normal?
YES >>
GO TO 2.
NO >>
Repair or replace error-detected parts.
PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Erase DTC.
3. Perform DTC confirmation procedure again. Refer to Confirmation Procedure.
4. Check 1st trip DTC.
Is the DTC P062B displayed again?
YES >>
Replace ECM. Refer to ECM : Removal & Installation.
NO >>
INSPECTION END

 P061b Ecm

Dtc Description DTC Description DTC DETECTION LOGIC DTC CONSULT screen terms (Trouble diagnosis content) DTC detection condition P061B CONTROL MODULE (Internal Control Module To...

 P062d Ecm

Dtc Description DTC Description This DTC is detected when the ECM-integrated injector driver unit has a malfunction. DTC DETECTION LOGIC DTC CONSULT screen terms (Trouble diagno...

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