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 MANUALSLEXUS2010LS 460L AWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTINFOTAINMENTAUDIO / VISUAL (W/O MULTI-DISPLAY) (DIAGNOSTIC CODES & SYMPTOM TESTS)AUDIO AND VISUAL SYSTEM (W/O MULTI-DISPLAY)SOUND SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND STEREO COMPONENT AMPLIFIERPROCEDURE

2010 Lexus LS 460L AWD

Sound Signal Circuit between Radio Receiver and Stereo Component Amplifier: Procedure

2010 Lexus LS 460L AWDSECTION Procedure

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT AMPLIFIER)

Disconnect the L51 receiver connector.

Fig 1: Identifying L51 Receiver And R34 Amplifier Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the R34 amplifier connector.

Measure the resistance according to the value(s) in the table below.

Standard resistance

Tester Connection	Condition	Specified Condition
L51-8 (R+) - R34-5 (R+)	Always	Below 1 Ω
L51-18 (R-) - R34-4 (R-)	Always	Below 1 Ω
L51-9 (L+) - R34-3 (L+)	Always	Below 1 Ω
L51-19 (L-) - R34-2 (L-)	Always	Below 1 Ω
L51-10 (SLD) - R34-6 (SLD)	Always	Below 1 Ω
L51-8 (R+) - Body ground	Always	10 kΩ or higher
L51-18 (R-) - Body ground	Always	10 kΩ or higher
L51-9 (L+) - Body ground	Always	10 kΩ or higher
L51-19 (L-) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → See step 2

PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to 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.