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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 67 (Automatic Transmission Diagnosis - A340E, A340F) >> Diagnostic Tests >> DTC P1520: Stop Light Switch Signal Malfunction >> Circuit Description

Circuit Description

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Stop light switch signal is used to detect when brakes have been applied. ECM uses this signal to cancels operation of TCC. DTC is set if stop light switch does not turn off when vehicle is being driven. Possible causes are:

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