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Home >> Toyota >> 2001 >> Corolla CE, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 63 (Automatic Transmission Diagnosis - U140E & U140F) >> Diagnostic Tests >> DTC P1520: BRAKELIGHT Switch Circuit Malfunction >> Circuit Description

Circuit Description

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2002 Toyota RAV4, 2002 Toyota Highlander, 2002 Toyota Camry, 2002 Lexus RX 300, and 2001 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

When brake pedal is depressed, brakelight switch sends a signal to ECM. If transaxle is in lock-up mode, ECM cancels lock-up operation and prevents engine stall. DTC will set if ECM detects brakelight switch signal does not turn off during driving. Possible causes are: