Nissan Sentra B18 (2020-2025) Service Manual: Ambient Sensor Signal Circuit

Diagnosis Procedure

1. CHECK AMBIENT SENSOR POWER SUPPLY

   1. 1. Ignition switch OFF.

      2. Disconnect ambient sensor harness connector.

      3. Ignition switch ON.

      4. Check voltage between ambient sensor harness connector and ground.

         (+)		(–)		Voltage (Approx.)
         Ambient sensor
         Connector	Terminal
         E67	1	Ground		5 V

   Is the inspection result normal?

   YES >>

   GO TO 2.

   NO >>

   GO TO 4.

2. CHECK AMBIENT SENSOR GROUND CIRCUIT

   1. 1. Ignition switch OFF.

      2. Check continuity between ambient sensor harness connector and ground.

         Ambient sensor		—		Continuity
         Connector	Terminal
         E67	2	Ground		Yes

   Is the inspection result normal?

   YES >>

   GO TO 3.

   NO >>

   Repair or replace harness or connector.

3. CHECK AMBIENT SENSOR

   1. Check ambient sensor. Refer to Component Inspection.

   Is the inspection result normal?

   YES >>

   Replace combination meter. Refer to Removal and Installation.

   NO >>

   Replace ambient sensor. Refer to Removal and Installation.

4. CHECK AMBIENT SENSOR POWER SUPPLY CIRCUIT FOR OPEN

   1. 1. Ignition switch OFF.

      2. Disconnect combination meter harness connector.

      3. Check continuity between ambient sensor harness connector and combination meter harness connector.

         Ambient sensor		Combination meter		Continuity
         Connector	Terminal	Connector	Terminal
         E67	1	M24	29	Yes

   Is the inspection result normal?

   YES >>

   GO TO 5.

   NO >>

   Repair or replace harness or connector.

5. CHECK AMBIENT SENSOR POWER SUPPLY CIRCUIT FOR GROUND SHORT

   1. Check continuity between ambient sensor harness connector and ground.

      Ambient sensor		—		Continuity
      Connector	Terminal
      E67	1	Ground		No

   Is the inspection result normal?

   YES >>

   GO TO 6.

   NO >>

   Repair or replace harness or connector.

6. CHECK AMBIENT SENSOR POWER SUPPLY CIRCUIT FOR POWER SHORT

   1. 1. Ignition switch ON.

      2. Check voltage between ambient sensor harness connector and ground.

         (+)		(–)		Voltage (Approx.)
         Ambient sensor
         Connector	Terminal
         E67	1	Ground		0 V

   Is the inspection result normal?

   YES>>

   Replace combination meter. Refer to Removal and Installation.

   NO>>

   Repair or replace harness or connector.

Component Inspection

1. CHECK AMBIENT SENSOR

   1. 1. Ignition switch OFF.

      2. Disconnect ambient sensor connector.

      3. Check resistance between ambient sensor terminals.

         Ambient sensor		Condition	Resistance: kΩ
         Terminals		Temperature: °C (°F)
         1	2	−15 (5)	12.73
         		−10 (14)	9.92
         		−5 (23)	7.80
         		0 (32)	6.19
         		5 (41)	4.95
         		10 (50)	3.99
         		15 (59)	3.24
         		20 (68)	2.65
         		25 (77)	2.19
         		30 (86)	1.81
         		35 (95)	1.51
         		40 (104)	1.27
         		45 (113)	1.07

   Is the inspection result normal?

   YES >>

   Inspection End.

   NO >>

   Replace ambient sensor. Refer to Removal and Installation.

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