Ambient Sensor Signal Circuit

AMBIENT SENSOR SIGNAL CIRCUIT





Description
Transmits the ambient sensor signal to the combination meter.




Component Function Check
1.COMBINATION METER INPUT SIGNAL
1. Select "METER/M&A" on CONSULT-III.
2. Using "OUTSIDE TEMP" on "DATA MONITOR", compare the value of DATA MONITOR with temperature display on combination meter. DATA MONITOR and combination meter indications should be close.
Does the data monitor value approximately match the display on the combination meter?
YES - Inspection End.
NO - Replace combination meter. Removal And Installation.




Diagnosis Procedure
Regarding Wiring Diagram information, Meter.
1.CHECK AMBIENT SENSOR CIRCUITS BETWEEN COMBINATION METER AND IPDM E/R





1. Disconnect combination meter connector M24 and IPDM E/R connector E18.
2. Check continuity between combination meter harness connector
M24 (A) terminals 18, 20 and IPDM E/R harness connector E18
(B) terminals 20 and 21.





3. Check continuity between combination meter harness connector M24 (A) terminals 18, 20 and ground.





Is the inspection result normal?
YES - GO TO 2
NO - Repair 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
(A) terminals 99, 100 and ambient sensor harness connector
E211 terminals 1 and 2.






3. Check continuity between IPDM E/R harness connector E201 (A) terminals 99, 100 and ground.





Is the inspection result normal?
YES - Replace IPDM E/R. Service and Repair.
NO - Repair harness or connector.




Component Inspection





After disconnecting ambient sensor (1) connector E211, measure resistance between terminals 1 and 2 at sensor side. Refer to table below.





If NG, replace ambient sensor.