Nissan Sentra B18 (2020-2025) Service Manual: B20de-72 Ign Relay Off Circ

Nissan Sentra B18 (2020-2025) Service Manual / Electrical & Power Control / Power Control System :: Ipdm E/r / Dtc/circuit Diagnosis / B20de-72 Ign Relay Off Circ

Dtc Description

DTC Description

The IPDM E/R operates the ignition relay-1 when it receives an ignition switch ON signal from the BCM via CAN communication.
Turn the ignition relay-1 OFF by pressing the push-button ignition switch once when the Nissan Sentra vehicle speed is 2.5 MPH (4 km/h) or less.
Turn the ignition relay-1 OFF with the following operation when the Nissan Sentra vehicle speed is more than 2.5 MPH (4 km/h) or when an abnormal condition occurs in CAN communication from the combination meter (emergency OFF):
- Press and hold the push-button ignition switch for 2 seconds or more.
- Press the push-button ignition switch 3 times within 1.5 seconds.

Note:

The ignition relay-1 does not turn ON for 3 seconds after emergency OFF even if the push-button ignition switch is pressed.

DTC DETECTION LOGIC

DTC No.	CONSULT screen items (Trouble diagnosis content)		DTC detection condition
B20DE-72	IGN RELAY OFF CIRC (Ignition relay OFF circuit)	[ACTUATOR STUCK OPEN]	Diagnosis condition	When ignition switch is ON
			Signal (terminal)	CPU monitors the status at the contact and excitation coil circuits of the ignition relay-1 inside it
			Threshold	The ignition relay-1 OFF is detected
			Diagnosis delay time	1 second or more

POSSIBLE CAUSE

IPDM E/R

FAIL-SAFE

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Dtc Confirmation Procedure

DTC Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE
1. CONSULT
  1. Ignition switch ON.
  2. Select “Self Diagnostic Result” mode of “IPDM E/R”.
Is DTC detected?
YES>>
Refer to DTC Diagnosis Procedure.
NO>>
To check malfunction symptom before repair: Refer to Intermittent Incident.
NO>>
Confirmation after repair: Inspection End.

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

REPLACE IPDM E/R
1. Replace IPDM E/R. Refer to Removal and Installation.
>>
Inspection End.

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