Ignition "OFF".
Disconnect ambient sensor.
Measure resistance between terminal "1" and "2" of ambient sensor.
Specification : Refer the specifications in fig3)
Is the measured resistance within specifications in fig3)? (tolerance limits ±3%)
YES
Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
NO
Substitute with a known-good ambient sensor and check for proper operation.
If the problem is corrected, replace ambient sensor and then go to "Verification of Vehicle Repair" procedure.