Ambient Sensor Signal Circuit

AMBIENT SENSOR SIGNAL CIRCUIT

Description

Transmits the ambient sensor signal to the IPDM E/R.


Component Function Check


1. COMBINATION METER INPUT SIGNAL

1.Select METER/M&A on CONSULT.
2.Check OUTSIDE TEMP on DATA MONITOR.
Does the ambient temperature approximately match the CONSULT display?
YES- Replace combination meter. Refer to "Removal and Installation" Service and Repair.
NO- Refer to "Diagnosis Procedure" .


Diagnosis Procedure

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

1. CHECK AMBIENT SENSOR CIRCUITS BETWEEN COMBINATION METER AND IPDM E/R

1.Disconnect combination meter connector M24 and IPDM E/R connector E63.
2.Check continuity between combination meter harness connector M24 terminals 30, 31 and IPDM E/R harness connector E63 terminals 49 and 50.





3.Check continuity between combination meter harness connector M24 terminals 30, 31 and ground.





Is the inspection result normal?
YES- GO TO 2.
NO- Repair or replace harness or connector.

2. CHECK AMBIENT SENSOR CIRCUITS BETWEEN IPDM E/R AND AMBIENT SENSOR

1.Disconnect IPDM E/R connector E201 and ambient sensor connector E211.
2.Check continuity between IPDM E/R harness connector E201 terminals 87, 95 and ambient sensor harness connector E211 terminals 1 and 2.





3.Check continuity between IPDM E/R harness connector E201 terminals 87, 95 and ground.





Is the inspection result normal?
YES- Replace IPDM E/R. Refer to "Removal and Installation" Service and Repair.
NO- Repair or replace harness or connector.


Component Inspection


1. CHECK AMBIENT SENSOR

1.Turn ignition switch OFF.
2.Disconnect ambient sensor connector.
3.Check resistance between ambient sensor terminals.





Is the inspection result normal?
YES- Inspection End.
NO- Replace ambient sensor. Refer to "Removal and Installation" Ambient Sensor.