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Home >> Toyota >> 2004 >> Matrix Base, FWD, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 430 (Hybrid Vehicle Control System - Diagnostics) >> Circuit Inspection >> DTC P1520: Stop Light Switch (Cruise Control System) Malfunction >> Circuit Description - DTC P1520 - Information Code 115 >> Inspection Procedure
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Inspection Procedure

WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
  1. Is DTC of brake ECU being output? 
    1. YES  : Check DTC of brake ECU. See RETRIEVING DIAGNOSTIC TROUBLE CODES .
    2. NO:  Go to  2.
  2. Check voltage between terminal 2, 3 of stop light switch and body ground. 
    1. NG:  Repair or replace wire harness or connector.
    2. OK:  Go to  3.
  3. Check for open and short in wire harness between stop light switch and terminals STP, ST1- of HV ECU  . See . HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION .
    1. NG:  Repair or replace wire harness.
    2. OK:  Check and replace stop light switch. See STOP LIGHT SYSTEM .
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