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STEP
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INSPECTION
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ACTION
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1
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• Inspect ambient temperature sensor.
• Is it okay?
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Yes
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Go to next step.
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No
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Replace ambient temperature sensor.
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2
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• Disconnect climate control unit connector (24-pin) and ambient temperature sensor connector.
• Is there open circuit between following terminals of climate control unit connector (24-pin) and ambient temperature sensor connector?
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- 1K-B
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- 1I-A
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Yes
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Repair wiring harness.
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No
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Go to next step.
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3
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• Is there short circuit to ground between terminal 1K of climate control unit connector (24-pin) and terminal B of ambient temperature sensor connector?
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Yes
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Repair wiring harness.
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No
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Connect climate control unit connector, then go to next step.
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4
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• Turn ignition switch to ON position.
• Measure voltage at terminal 1K of climate control unit connector (24-pin).
• Is voltage approximately 5 V?
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Yes
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This system is normal at present. (Erase the past failure from memory.)
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No
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Replace climate control unit.
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