Description
U1300 is indicated when a communication signal malfunction occurs. U1300 is indicated along with DTCs that identify components connected to the AV control unit through communication lines. Determine the possible malfunction cause from the table below.
SELF-DIAGNOSIS RESULTS DISPLAY ITEM

U1255 satellite radio tuner
U1310 AV control unitFront door speaker
Removal and Installation
REMOVAL
Remove the front door finisher. Refer to INT-18, "Removal and
Installation".
Remove the front door speaker screws (A).
Disconnect the harness connector from the front door speaker
(1) and remove.
Remove the front door speaker spacer screws ...
Symptom diagnosis
CHARGING SYSTEM
Symptom Table
Symptom
Reference
Battery discharged
Refer to CHG-2, "Work Flow (With EXP-800 NI or GR8-1200
NI)"
or CHG-5, "Work Flow (Without EXP-800 NI or GR8-1200 NI)".
The charge warning lamp does not illuminate ...
Seat belt buckle switch signal circuit
Description
Transmits a seat belt buckle switch LH signal to the combination meter.
Component Function Check
1. CHECK COMBINATION METER INPUT SIGNAL
Start engine.
Monitor seat belt warning lamp while fastening and unfastening the
driver seat belt.
Diagnosis Procedure
Regarding Wiring ...