ecm-ecu-engine-computer-module The Security Light came on my Toyota Rav4 after you repaired ECU: What's the Problem? John Wells 7 December 2020 Toyota RAV4 (2001 – 2003) ECM Repair If the Security Light turns on for the Toyota Rav4 follow this procedure: Insert the key Wait for it to be in stage (II), wait for 10 seconds, then proceed to start the vehicle.
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