Intake Sensor

INTAKE SENSOR

System Description


COMPONENT DESCRIPTION

Intake Sensor





The intake sensor is located on the heater & cooling unit assembly. It converts temperature of air after if passes through the evaporator into a resistance value which is then input to the A/C auto amp.


Intake Sensor Diagnosis Procedure

Regarding Wiring Diagram information, [1][2]Electrical Diagrams.

DIAGNOSTIC PROCEDURE FOR INTAKE SENSOR






SYMPTOM: Intake sensor circuit is open or shorted. Using the CONSULT, DTC B2581 or B2582 is displayed. Without a CONSULT, code
56 or 57 is indicated on A/C auto amp. as a result of conducting self-diagnosis.

1. CHECK VOLTAGE BETWEEN INTAKE SENSOR AND GROUND






1.Disconnect intake sensor connector.
2.Turn ignition switch ON.
3.Check voltage between intake sensor harness connector M146
terminal 2 and ground.
2 - Ground: Approx. 5V
Is the inspection result normal?
YES- GO TO 2.
NO- GO TO 4.

2. CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND A/C AUTO AMP.






1.Turn ignition switch OFF.
2.Disconnect A/C auto amp. connector.
3.Check continuity between intake sensor harness connector
M146 (B) terminal 1 and A/C auto amp. harness connector M49
(A) terminal 26.
1 - 26: Continuity should exist.
Is the inspection result normal?
YES- GO TO 3.
NO- Repair harness or connector.

3. CHECK INTAKE SENSOR

Check intake sensor. .
Is the inspection result normal?
YES- 1.Replace A/C auto amp. Service and Repair.
2.Go to A/C Auto Amp. Self-Diagnosis and perform self-diagnosis.
NO- 1.Replace intake sensor. Intake Sensor.
2.Go to A/C Auto Amp. Self-Diagnosis and perform self-diagnosis.

4. CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND A/C AUTO AMP.






1.Turn ignition switch OFF.
2.Disconnect A/C auto amp. connector.
3.Check continuity between intake sensor harness connector
M146 (B) terminal 2 and A/C auto amp. harness connector M49
(A) terminal 11.
2 - 11: Continuity should exist.
4.Check continuity between intake sensor harness connector
M146 (B) terminal 2 and ground.
2 - Ground: Continuity should not exist.
Is the inspection result normal?
YES- 1.Replace A/C auto amp. Service and Repair.
2.Go to A/C Auto Amp. Self-Diagnosis and perform self-diagnosis.
NO- Repair harness or connector.


Intake Sensor Component Inspection


COMPONENT INSPECTION

Intake Sensor





After disconnecting intake sensor connector, measure resistance between terminals 1 and 2 at sensor harness side, using the table below.





If NG, replace intake sensor. Intake Sensor.