Nissan Sentra B18 (2020-2025) Service Manual: P155d Generator

Nissan Sentra B18 (2020-2025) Service Manual / Engine / Work Procedure (After Replacing Electric Throttle Control Actuator) / Dtc/circuit Diagnosis / P155d Generator

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P155D	GENERATOR	A	Diagnosis condition	Engine running at idle
			Signal (terminal)	Generator mechanical malfunction signal
			Threshold	ECM receives mechanical malfunction signal sent from generator
			Diagnosis delay time	—
		B	Diagnosis condition	Engine running at idle
			Signal (terminal)	Generator electrical malfunction signal
			Threshold	ECM receives electrical malfunction signal sent from generator
			Diagnosis delay time	—

POSSIBLE CAUSE

Generator

FAIL-SAFE

Engine Control System

Not applicable

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

If DTC Confirmation Procedure has been previously conducted. always perform the following procedure before conducting the next test.
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.
>>
GO TO 2.
PERFORM DTC CONFIRMATION PROCEDURE
1. Start the engine and let it idle at least 10 seconds.
2. Check DTC.
Is DTC detected?
YES >>
Proceed to DTC Diagnosis Procedure.
NO-1 >>
To check malfunction symptom before repair: Refer to Intermittent Incident.
NO-2 >>
Confirmation after repair: INSPECTION END

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

CHECK CHARGING SYSTEM

Perform trouble diagnosis for charging system. Refer to Diagnosis Procedure.

Is the inspection result normal?
YES >>
Replace generator. Refer to Removal and Installation.
NO >>
Repair or replace error-detected parts.

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