- Harness or connector
- Stereo component tuner assembly
- Radio and display receiver assembly
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000001KTV5 |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - 11/2017] |
| Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: B156C; Extension Module Disconnected; 2016 - 2017 MY Sienna [12/2015 - 11/2017] | ||
|
DTC |
B156C |
Extension Module Disconnected |
DESCRIPTION
The stereo component tuner assembly and the radio and display receiver assembly are connected by the USB communication line.
When an USB communication error occurs between the stereo component tuner assembly and the radio and display receiver assembly, this DTC will be stored.
|
DTC Code |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
B156C |
Extension Module Disconnected |
Stereo component tuner assembly disconnected. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
After replacing the stereo component tuner assembly of vehicles subscribed to pay-type satellite radio broadcasts, XM radio ID registration is necessary.
PROCEDURE
|
1. |
CHECK FOR DTC |
(a) Clear the DTCs.
Click here
![2016 - 2017 MY Sienna [12/2015 - 11/2017]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: DTC CHECK / CLEAR](/t3Portal/stylegraphics/info.gif)
(b) Turn the ignition switch off.
(c) Check for DTCs.
Click here
OK:
No DTCs are output.
| OK |
|
USE SIMULATION METHOD TO CHECK
|
|
|
2. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - STEREO COMPONENT TUNER ASSEMBLY) |
(a) Disconnect the Z3 radio and display receiver assembly connectors.
(b) Disconnect the Z2 stereo component tuner assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
Z3-4 (+B2) - Z2-4 (+B2) |
Always |
Below 1 Ω |
|
Z3-3 (ACC2) - Z2-3 (ACC2) |
Always |
Below 1 Ω |
|
Z3-8 (GND2) - Z2-8 (GND2) |
Always |
Below 1 Ω |
|
Z3-4 (+B2) - Body ground |
Always |
10 kΩ or higher |
|
Z3-3 (ACC2) - Body ground |
Always |
10 kΩ or higher |
|
Z3-8 (GND2) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY |
|
(a) Disconnect the stereo component tuner assembly connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
Z2-4 (+B2) - Z2-8 (GND2) |
Always |
11 to 14 V |
|
Z2-3 (ACC2) - Z2-8 (GND2) |
Ignition switch ACC |
11 to 14 V |
| NG |
|
|
|
4. |
CHECK HARNESS AND CONNECTOR (USB COMMUNICATION LINE) |
|
(a) Disconnect the V6 radio and display receiver assembly connectors. |
|
(b) Disconnect the V4 stereo component tuner assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
V6-1 (USV4) - V4-1 (USV4) |
Always |
Below 1 Ω |
|
V6-2 (US4-) - V4-2 (US4-) |
Always |
Below 1 Ω |
|
V6-3 (US4+) - V4-3 (US4+) |
Always |
Below 1 Ω |
|
V6-4 (UGD4) - V4-4 (UGD4) |
Always |
Below 1 Ω |
|
V6-5 (USG4) - V4-5 (USG4) |
Always |
Below 1 Ω |
|
V6-1 (USV4) - Body ground |
Always |
10 kΩ or higher |
|
V6-2 (US4-) - Body ground |
Always |
10 kΩ or higher |
|
V6-3 (US4+) - Body ground |
Always |
10 kΩ or higher |
|
V6-4 (UGD4) - Body ground |
Always |
10 kΩ or higher |
|
V6-5 (USG4) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY |
(a) Replace the stereo component tuner assembly with a known good one.
Click here
(b) Clear the DTCs.
Click here
(c) Turn the ignition switch off.
(d) Check for DTCs.
Click here
OK:
No DTCs are output.
| OK |
|
END (STEREO COMPONENT TUNER ASSEMBLY IS DEFECTIVE) |
| NG |
|
|
|