Nissan Sentra B18 (2020-2025) Service Manual / Ventilation, Heater & Air Conditioner / Heater & Air Conditioning Control System :: Manual Air Conditioner / Dtc/circuit Diagnosis / B20c7-15 A/c Clutch

Nissan Sentra B18 (2020-2025) Service Manual: B20c7-15 A/c Clutch

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)		DTC detection condition
B20C7–15	A/C clutch (A/C clutch)	[CIRC SHORT TO BATT OR OPEN]	Diagnosis condition	When A/C switch is ON
			Signal (Terminal)	Magnetic clutch ON signal
			Threshold	Magnetic clutch ON signal circuit has a shorted to power or open
			Diagnosis delay time	1 second or more

POSSIBLE CAUSE

Harness or connectors (magnetic clutch ON signal circuit is shorted to battery or open)
IPDM E/R

FAIL-SAFE

Inhibit A/C compressor (magnetic clutch) operation

Confirmation Procedure

Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE
1. CONSULT
  1. Start the engine.
  2. Turn A/C switch ON.
  3. 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

CHECK MAGNETIC CLUTCH ON SIGNAL CIRCUIT FOR OPEN

Ignition switch OFF.
Disconnect IPDM E/R connector and A/C compressor connector.

Check continuity between IPDM E/R harness connector and A/C compressor harness connector.

IPDM E/R		A/C compressor		Continuity
Connector	Terminal	Connector	Terminal	Continuity
F96	65	F4	1	Yes

Is the inspection result normal?

YES >>

GO TO 2.

NO >>

Repair harness or connector.

CHECK MAGNETIC CLUTCH ON SIGNAL CIRCUIT FOR SHORT

Check voltage between IPDM E/R harness connectors and the ground.

+	–	Voltage (Approx.)
F96	65	Ground	0 V

–

Voltage

(Approx.)

IPDM E/R

Connector

Terminal

F96

Ground

0 V

Is the inspection result normal?

YES >>

GO TO 3.

NO >>

Repair harness or connector.

CHECK MAGNETIC CLUTCH GROUND CIRCUIT FOR OPEN

Check continuity between A/C compressor harness connectors and the ground.

A/C compressor		—	Continuity
Connector	Terminal	—	Continuity
F4	2	Ground	Yes

Is the inspection result normal?

YES>>

Replace IPDM E/R. Refer to Removal and Installation.

NO>>

Repair harness or connector.

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