Toyota Sienna Service Manual: Terminals of ECU
1. RADIO RECEIVER (10 SPEAKER SYSTEM)
*1: with Rear Seat Entertainment System
2. RADIO RECEIVER (6 SPEAKER SYSTEM)
*1: with Rear Seat Entertainment System
*2: without Rear Seat Entertainment System
3. STEREO COMPONENT AMPLIFIER
4. TELEVISION DISPLAY ASSEMBLY
Problem symptoms table
HINT:
Before inspecting the suspected areas listed in the table
below, check the fuse and relay.
Before inspecting the suspected areas listed in the table
below, check for DTCs.
...
DTC check / clear
HINT: If the system cannot enter the diagnostic mode,
inspect all AVC-LAN communication signals and repair or replace problem parts.
1. STARTING DIAGNOSTIC MODE
Turn the ignition swit ...
Other materials:
Radio Receiver Communication Error
INSPECTION PROCEDURE
1 IDENTIFY THE COMPONENT SHOWN BY THE SUB-CODE
Enter the diagnostic mode
Press the preset switch "3" to change to "Detailed
Information Mode".
Identify the component shown by the sub-code.
HINT:
"190 (radio receiver) ...
Data list / active test
1. USING INTELLIGENT TESTER
Connect the intelligent tester to the DLC3.
Monitor the ECU data by following the prompts on
the tester screen.
HINT:
The intelligent tester has a "Snapshot" function
which records the monitored data. Refer to the
intelligent tester ope ...
Open in Occupant Classification ECU Battery
Positive Line
DTC B1794 Open in Occupant Classification ECU Battery
Positive Line
DESCRIPTION
This circuit consists of the occupant classification ECU and the power source
circuit (battery, fuse, wire
harness).
DTC B1794 is recorded when a malfunction is detected in the occupant
classification ECU or t ...
