LEMON Manuals
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Mazda
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2003
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B2300 Base, Automatic
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Repair and Diagnosis
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Engine Performance
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Engine Controls - Self-Diagnostics
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Diagnostic Tests
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DTC P1780: Transmission Control Switch Malfunction Or Transmission Control Indicator Light Circuit Malfunction
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Possible Causes
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Possible Causes
Possible causes are:
Damaged indicator bulb and/or fuse.
Damaged TCS.
Damaged PCM.
Open or short circuit.