Sound Signal Circuit between Radio Receiver and Multimedia Interface ECU: Procedure

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - MULTI MEDIA INTERFACE ECU)

Disconnect the radio receiver assembly and multimedia interface ECU connectors.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
F79-2 (URO+) - F82-2 (CDR+)	Always	Below 1 Ω
F79-3 (URO-) - F82-3 (CDR-)	Always	Below 1 Ω
F79-4 (ULO+) - F82-4 (CDL+)	Always	Below 1 Ω
F79-5 (ULO-) - F82-5 (CDL-)	Always	Below 1 Ω
F79-1 (USD1) - F82-1 (CSLD)	Always	Below 1 Ω
F79-1 (USD1) - Body ground	Always	10 kΩ or higher
F79-2 (URO+) - Body ground	Always	10 kΩ or higher
F79-3 (URO-) - Body ground	Always	10 kΩ or higher
F79-4 (ULO+) - Body ground	Always	10 kΩ or higher
F79-5 (ULO-) - Body ground	Always	10 kΩ or higher
F79-1 (USD1) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → See step 2

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE