Nissan Sentra B18 (2020-2025) Service Manual: B24f5-93 Mode Door Motor

Nissan Sentra B18 (2020-2025) Service Manual / Ventilation, Heater & Air Conditioner / Heater & Air Conditioning Control System :: Automatic Air Conditioner / Dtc/circuit Diagnosis / B24f5-93 Mode Door Motor

Dtc Description

DTC Description

DTC DETECTION LOGIC

Note:

If all of door motors DTC (B24F5-93, B24F6-93, B24F7-93, B24F8-93) are detected, check “DOOR MOTOR CIRCUIT”. Refer to Diagnosis Procedure.

DTC No.	CONSULT screen terms (Trouble diagnosis content)		DTC detection condition
B24F5-93	Mode door motor (Mode door motor)	Diagnosis condition	Ignition switch ON
		Signal (Terminal)	LIN (Door motor) signal
		Threshold	Drive error of mode door motor is detected
		Diagnosis delay time	2 seconds or more

POSSIBLE CAUSE

Harness and connector (mode door motor circuit is open or shorted to ground)
Mode door motor installation condition
Mode door motor
A/C auto amp.

FAIL-SAFE

—

Confirmation Procedure

Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE
1. CONSULT
  1. Ignition switch ON.
  2. Select “Self Diagnostic Result” mode of “HVAC”.
  3. Check DTC.
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 MODE DOOR MOTOR POWER SUPPLY

Ignition switch ON.

Check voltage between mode door motor harness connector and ground.

+	–	Voltage (Approx.)
M166	1	Ground	Battery voltage

–

Voltage

(Approx.)

Mode door motor

Connector

Terminal

M166

Ground

Battery voltage

Is the inspection result normal?

YES >>

GO TO 2.

NO >>

GO TO 5.

CHECK MODE DOOR MOTOR GROUND CIRCUIT FOR OPEN

Ignition switch OFF.
Disconnect mode door motor connector.

Check continuity between mode door motor harness connector and ground.

Mode door motor		—	Continuity
Connector	Terminal	—	Continuity
M166	2	Ground	Yes

Is the inspection result normal?

YES >>

GO TO 3.

NO >>

Repair harness or connector.

CHECK MODE DOOR MOTOR LIN SIGNAL CIRCUIT

Connect mode door motor connector.
Ignition switch ON.

Confirm output waveform between mode door motor harness connector and ground with oscilloscope.

+		-
Mode door motor
Connector	Terminal
M166	3	Ground

Is the inspection result normal?

YES >>

GO TO 4.

NO >>

GO TO 6.

CHECK INSTALLATION OF MODE DOOR MOTOR
1. Check mode door motor is properly installed. Refer to Exploded View.
Is the inspection result normal?
YES >>
Replace mode door motor. Refer to Removal and Installation.
NO >>
Repair or replace malfunctioning part.

CHECK MODE DOOR MOTOR POWER SUPPLY CIRCUIT FOR OPEN

Ignition switch OFF.
Disconnect mode door motor connector and A/C auto amp. connector.

Check continuity between mode door motor harness connector and A/C auto amp. harness connector.

Mode door motor		A/C auto amp.		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M166	1	M33	1	Yes

Is the inspection result normal?

YES >>

Replace A/C auto amp. Refer to Removal and Installation.

NO >>

Repair harness or connector.

CHECK MODE DOOR MOTOR LIN SIGNAL CIRCUIT FOR OPEN

Ignition switch OFF.
Disconnect mode door motor connector and A/C auto amp. connector.

Check continuity between mode door motor harness connector and A/C auto amp. harness connector.

Mode door motor		A/C auto amp.		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M166	3	M33	22	Yes

Is the inspection result normal?

YES >>

Replace A/C auto amp. Refer to Removal and Installation.

NO >>

Repair harness or connector.

B24d4-08 A/c Control Comm

Dtc Description DTC Description DTC DETECTION LOGIC DTC No. CONSULT screen terms (Tro ...

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