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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 115 (Engine Control System Self Diagnostics - 4-Cylinder) >> Diagnostic Tests >> DTC P0504: Brake Switch "A"/"B" Correlation >> Diagnosis & Repair

Diagnosis & Repair

WARNING: This page is about a different car, the 2003 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.

For diagnosis and repair, see Fig 1 and Fig 2 . To check stop light circuit, see appropriate WIRING DIAGRAM under EXTERIOR LIGHTS in SYSTEM WIRING DIAGRAMS article. To check for intermittent problems, see INTERMITTENT PROBLEM CHECK  under SELF-DIAGNOSTIC SYSTEM. To identify circuits referenced in testing, see appropriate WIRING DIAGRAM under ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article. To check ECM inputs and outputs, see PIN VOLTAGE CHARTS article. For ECM location, see ENGINE CONTROL MODULE LOCATION  under SELF-DIAGNOSTIC SYSTEM.

Fig 1: DTC P0504 Diagnostic Procedure (Step 1)
G00240810Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: DTC P0504 Diagnostic Procedure (Steps 2-3)
G00240811Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002