Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSLEXUS2012IS 250C V6-2.5L (4GR-FSE)REPAIR AND DIAGNOSISACCESSORIES AND OPTIONAL EQUIPMENTRADIO, STEREO, AND COMPACT DISCTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSAUDIO AND VISUAL SYSTEM (W/O NAVIGATION SYSTEM WITH MULTI-DISPLAY)SOUND SIGNAL CIRCUIT BETWEEN MULTI-MEDIA INTERFACE ECU AND STEREO JACK ADAPTER
2012 Lexus IS 250C V6-2.5L (4GR-FSE)
Sound Signal Circuit between Multi-media Interface ECU and Stereo Jack Adapter
2012 Lexus IS 250C V6-2.5L (4GR-FSE)SECTION Sound Signal Circuit between Multi-media Interface ECU and Stereo Jack Adapter
AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (w/o Navigation System with Multi-display): Sound Signal Circuit between Multi-media Interface ECU and Stereo Jack Adapter
- Sound Signal Circuit between Multi-media Interface ECU and Stereo Jack Adapter
DESCRIPTION
The No. 1 stereo jack adapter assembly sends the sound data signal of an external device to the multi-media interface ECU through this circuit.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA INTERFACE ECU - NO. 1 STEREO JACK ADAPTER ASSEMBLY)
(a) Disconnect the multi-media interface ECU connector.
(b) Disconnect the No. 1 stereo jack adapter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.