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Toyota
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1993
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4Runner 2.4 R, Automatic
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Tests W/Codes - 4-CYL
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Diagnostic Code Charts
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Code 51 - Switch Signal
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Probable Causes:
Probable Causes:
Accelerator Pedal or Cable
ECU
Neutral/Start Switch or Switch Circuit
Throttle Position Sensor or Sensor IDL Circuit
NOTE:
Diagnostic chart not available from manufacturer.