Nissan Sentra B18 (2020-2025) Service Manual: A/c Switch Assembly Signal Circuit

Nissan Sentra B18 (2020-2025) Service Manual / Ventilation, Heater & Air Conditioner / Heater & Air Conditioning Control System :: Manual Air Conditioner / Dtc/circuit Diagnosis / A/c Switch Assembly Signal Circuit

Diagnosis Procedure

Diagnosis Procedure

CHECK WITH SELF DIAGNOSTIC RESULT FUNCTION
1. CONSULT
  1. Select “Self Diagnostic Result” mode of “HVAC”.
  2. Check DTC.
  Note:
  If DTC is displayed along with DTC U1010–49, first diagnose this code. Refer to DTC Diagnosis Procedure.
Is any DTC No. displayed?
YES >>
Perform diagnosis for the applicable DTC. Refer to DTC Index.
NO >>
GO TO 2.

CHECK LIN (A/C SWITCH ASSEMBLY → A/C AMP.) CIRCUIT CONTINUITY

Ignition switch OFF.
Disconnect the A/C switch assembly connector and the A/C amp. connector.

Check continuity between A/C switch assembly harness connector and A/C amp. harness connector.

A/C switch assembly		A/C amp.		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M59	8	M82	68	Yes

Check continuity between A/C switch assembly harness connector and ground.

A/C switch assembly		—		Continuity
Connector	Terminal	—		Continuity
M59	8	Ground		No

Is the inspection result normal?

YES>>

Perform trouble diagnosis for the A/C switch assembly. Refer to DTC Diagnosis Procedure.

NO>>

Repair harness or connector.

Intake Sensor

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Ignition Signal
Component Function Check Component Function Check INSPECTION START Turn ignition switch OFF, and restart engine. Does the engine start? YES-1 >> With CONSULT: GO TO 2. YES-2 >> Without CONSULT: GO TO 3. NO >> ...