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This code is set when the air thermo sensor
circuit is open (Code No.B1022) or is short (Code No.B1021).
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- Malfunction of the air thermo sensor
- Damaged the wiring harness or connectors
- Malfunction of the automatic air conditioner control panel
(A/C-ECU)
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Check that the following service data display
contents are normal. (Refer to .)
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- Item 03: Air thermo sensor
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Q.
Is the check result normal?
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![](../../../img/55/AC313393AD00ENG.png)
![](../../../img/55/AC313407AC00ENG.png)
![](../../../img/55/AC313417AC00ENG.png)
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Q.
Is the check result normal?
Go to Step 3.
Repair the connector.
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![](../../../img/55/AC313393AD00ENG.png)
![](../../../img/55/AC313407AC00ENG.png)
![](../../../img/55/AC313417AC00ENG.png)
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- Check the sensor signal line and earth line for open or short
circuit.
Q.
Is the check result normal?
Go to Step 4.
Repair the wiring
harness.
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Q.
Is the check result normal?
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Replace the air thermo
sensor.
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Q.
Is the diagnosis code set?
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Replace the automatic air conditioner
control panel (A/C-ECU).
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The
trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope
with Intermittent Malfunction ).
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