Last Modified: 04-05-2023 |
6.11:8.1.0 |
Doc ID: RM100000000VJEU |
Model Year Start: 2016 |
Model: Sienna |
Prod Date Range: [12/2015 -
] |
Title: NETWORKING: LIN COMMUNICATION SYSTEM: B1206; P/W Master Switch Communication Stop; 2016 - 2020 MY Sienna [12/2015 - ] |
DTC
|
B1206
|
P/W Master Switch Communication Stop
|
DESCRIPTION
This DTC is stored when LIN communication between the multiplex network master switch assembly and main body ECU stops for 10 seconds or more.
DTC Code
|
DTC Detection Condition
|
Trouble Area
|
B1206
|
No communication between the multiplex network master switch assembly and main body ECU for 10 seconds or more.
|
-
Multiplex network master switch assembly
-
Main body ECU
-
Harness or connector
-
Instrument panel junction block assembly
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
HINT:
DTC B2325 is stored when the communication between the multiplex network master switch assembly and main body ECU stops.
PROCEDURE
(a) Clear the DTC (See page
).
NEXT
|
|
|
(a) Check for DTCs (See page
).
Result
Result
|
Proceed to
|
DTC B1206 is output
|
A
|
DTC B1206 and B2325 are output
|
B
|
HINT:
When both B1206 and B2325 are output at the same time, troubleshoot B2325 first.
B |
|
GO TO DIAGNOSTIC TROUBLE CODE CHART
(See page
)
|
A
|
|
|
3.
|
INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
|
Text in Illustration
*a
|
Component without harness connected
(Instrument Panel Junction Block Assembly)
|
-
|
-
|
(a) Remove the Instrument Panel junction block Assembly (See page
).
(b) Remove the main body ECU from the Instrument Panel junction block Assembly (See page
).
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
2D-18 - 2I-16 (LIN2)
|
Always
|
Below 1 Ω
|
OK
|
|
|
4.
|
CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY)
|
(a) Disconnect the 2D instrument panel junction block assembly connector.
(b) Disconnect the H14 multiplex network master switch assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
2D-18 - H14-17 (LIN1)
|
Always
|
Below 1 Ω
|
2D-18 or H14-17 (LIN1) - Body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
5.
|
CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY - BATTERY AND BODY GROUND)
|
(a) Disconnect the multiplex network master switch assembly connector.
|
|
(b) Measure the resistance and voltage according to the value(s) in the tables below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
H14-12 (GND) - Body ground
|
Always
|
Below 1 Ω
|
Standard Voltage:
Tester Connection
|
Condition
|
Specified Condition
|
H14-11 (B) - Body ground
|
Always
|
11 to 14 V
|
Text in Illustration
*a
|
Front view of wire harness connector
(to Multiplex Network Master Switch Assembly)
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
6.
|
REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY
|
(a) Replace the multiplex network master switch assembly (See page
).
NEXT
|
|
|
(a) Clear the DTC (See page
).
NEXT
|
|
|
(a) Recheck for DTCs (See page
).
Result
Result
|
Proceed to
|
DTC B1206 is not output
|
A
|
DTC B1206 is output
|
B
|
A |
|
END (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY WAS DEFECTIVE)
|
|