Code
No. B1011, B1012: Ambient Temperature Sensor Circuit Low or High
TROUBLE JUDGMENT
This code is set when the ambient temperature sensor circuit is open or is short.
COMMENTS ON TROUBLE SYMPTOM
- Malfunction of the ambient temperature sensor
- Damaged the wiring harness and connectors
- Malfunction of the combination meter
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STEP 1. Check the ambient temperature sensor
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Refer to GROUP 55B, Sensors  .
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Q.
Is the check result normal?
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 Go to Step 2.
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 Replace the ambient temperature sensor.
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STEP 2. Connector check: A-17 ambient temperature sensor connector
and B-19 combination meter connector
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Q.
Is the check result normal?
Go to Step 3.
Repair the connector.
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STEP 3. Check the wiring harness between A-17 ambient temperature
sensor connector (terminals 1 and 2) and B-19 combination meter connector (terminals 13 and
18).
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- Check the input line for open or short circuit.
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Prior to the wiring harness inspection, check intermediate connector B-117, and repair
if necessary.
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Q.
Is the check result normal?
Go to Step 4.
Repair the wiring harness.
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STEP 4. Check whether the diagnosis code is reset.
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Recheck if the diagnosis code is set.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch to "ON" position.
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(3)Check if the diagnosis code is set.
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Q.
Is the diagnosis code set?
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Replace the combination meter, and then perform the variant coding (Refer to GROUP
00, Precautions Before Service - How to Perform Variant Coding ).
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The procedure is complete.
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