Sound cannot be Heard Sound Quality is Poor only when Replaying USB Storage Device or "iPod" [10/2022 - ]: Procedure

1. Disconnect the G185 radio and display receiver assembly connector.
2. Disconnect the G178*1 or G132*2 No. 1 stereo jack adapter assembly connector.
   1. *1: for 6 Speakers
   2. *2: for 9 Speakers
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G185-2 (US1-) - G178-2 (UDO-)*1	Always	Below 1 Ω
   G185-3 (US1+) - G178-3 (UDO+)*1	Always	Below 1 Ω
   G185-5 (USG1) - G178-5 (UJSS)*1	Always	Below 1 Ω
   G185-2 (US1-) - G132-2 (UDO-)*2	Always	Below 1 Ω
   G185-3 (US1+) - G132-3 (UDO+)*2	Always	Below 1 Ω
   G185-5 (USG1) - G132-5 (UJSS)*2	Always	Below 1 Ω
   G185-2 (US1-) - Body ground	Always	10 kΩ or higher
   G185-3 (US1+) - Body ground	Always	10 kΩ or higher
   G185-5 (USG1) - Body ground	Always	10 kΩ or higher

   *1: for 6 Speakers

   *2: for 9 Speakers

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  2

1. Replace the No. 1 stereo jack adapter assembly with a new or known good one.

   Refer to REMOVAL [06/2020 - ]

2. Check if the problem symptom recurs.

   Result

   Result	Proceed to
   Malfunction disappears	A
   Malfunction occurs	B

Result: 

A 

END (NO. 1 STEREO JACK ADAPTER ASSEMBLY MALFUNCTION) 

Result: 

B 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [10/2022 - ]