DTC Troubleshooting: B1229 (E and AUTO)
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DTC B1229 or DTC indicator E and AUTO:
An Open in the Sunlight Sensor Circuit
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Clear the DTC with the HDS.
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Turn the ignition switch to LOCK (0), and then to ON (II).
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Check for DTCs.
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Is DTC B1229 or E and AUTO indicated?
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YES
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NO
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Intermittent failure, check for loose wires or poor connections on the sunlight sensor circuit.■
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Turn the ignition switch to LOCK (0).
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Disconnect the sunlight sensor connector.
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Disconnect the climate control unit 36P connector.
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Check for continuity between the climate control unit 36P connector No. 19 terminal and the sunlight sensor 2P connector No. 1 terminal.
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YES
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NO
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Repair open in the wire between the climate control unit and the sunlight sensor.■
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