Toyota Tacoma (2015-2018) Service Manual: P/W Master Switch Communication Stop (B1206)
DESCRIPTION
This DTC is stored when LIN communication between the power window regulator master switch assembly and main body ECU (multiplex network body ECU) stops for 10 seconds or more.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B1206 |
No communication between power window regulator master switch assembly and main body ECU (multiplex network body ECU) for 10 seconds or more. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following inspection procedure.
- If the main body ECU (multiplex network body ECU) is replaced, refer
to Registration (See page
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)
PROCEDURE
|
1. |
INSPECT DRIVER SIDE JUNCTION BLOCK |
(a) Remove the driver side junction block (See page
).
(b) Remove the main body ECU (multiplex network body ECU) from the driver side junction block.
(c) Measure the resistance according to the value(s) in the table below.
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Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
1D-13 - MB-16 (LIN2) |
Always |
Below 1 Ω |
|
*a |
Component without harness connected (Driver Side Junction Block) |
- |
- |
HINT:
This inspection is to check the LIN line in the driver side junction block that connects the wire harness to the built-in main body ECU (multiplex network body ECU).
| NG | .gif) |
REPLACE DRIVER SIDE JUNCTION BLOCK |
|
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|
2. |
CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK - POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY) |
(a) for Double Cab
(1) Disconnect the 1D driver side junction block connector.
(2) Disconnect the P18 power window regulator master switch assembly connector.
(3) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
1D-13 - P18-6 (LIN1) |
Always |
Below 1 Ω |
|
1D-13 or P18-6 (LIN1) - Body ground |
Always |
10 kΩ or higher |
(b) for Access Cab
(1) Disconnect the 1D driver side junction block connector.
(2) Disconnect the P23 power window regulator master switch assembly connector.
(3) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
1D-13 - P23-17 (LIN1) |
Always |
Below 1 Ω |
|
1D-13 or P23-17 (LIN1) - Body ground |
Always |
10 kΩ or higher |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MASTER SWITCH - POWER SOURCE CIRCUIT) |
(a) for Double Cab
(1) Disconnect the P18 power window regulator master switch assembly connector.
(2) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
P18-3 (B) - P18-1 (GND) |
Always |
11 to 14 V |
(3) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
P18-1 (GND) - Body ground |
Always |
Below 1 Ω |
(b) for Access Cab
(1) Disconnect the P23 power window regulator master switch assembly connector.
(2) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
P23-11 (B) - P23-12 (GND) |
Always |
11 to 14 V |
(3) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
P23-12 (GND) - Body ground |
Always |
Below 1 Ω |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY |
(a) Replace the power window regulator master switch assembly.
|
|
5. |
CHECK DTC OUTPUT |
(a) Clear the DTCs (See page ).
(b) Recheck for DTCs.
OK:
DTC B1206 is not output.
| OK | |
END (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY WAS DEFECTIVE) |
| NG | |
REPLACE MAIN BODY ECU (MULTIPLEX BODY ECU) |
LIN Communication Bus Malfunction (B2325)
DESCRIPTION
The main body ECU (multiplex network body ECU) monitors communication between
all the ECUs connected to the door bus lines. When the main body ECU (multiplex
network body ECU) detects ...
Lost Communication with Power Source Control (B278C)
DESCRIPTION
DTC No.
DTC Detection Condition
Trouble Area
B278C
An internal malfunction occurs in the certification ECU (smart key ECU
...
Other materials:
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT CAMSHAFT TIMING GEAR BOLT
(a) Remove the camshaft timing oil control solenoid assembly (See page
).
(b) Check that the plunger strokes when the plunger in the center of
the camshaft timing gear bolt is pressed.
Standard stroke:
4 ...
Removal
REMOVAL
PROCEDURE
1. REMOVE REFRIGERANT FROM REFRIGERATION SYSTEM
2. REMOVE AIR CONDITIONER PRESSURE SENSOR
(a) Disconnect the connector.
(b) Using a 27 mm deep socket wrench, remove the air conditioner pressure
sensor.
T ...
Installation
INSTALLATION
PROCEDURE
1. INSTALL TRANSMISSION FLOOR SHIFT ASSEMBLY
(a) Install the transmission floor shift assembly to the vehicle body with the
4 bolts.
Torque:
14 N·m {143 kgf·cm, 10 ft·lbf}
(b) Attach the 4 clamps to connect the wire harness to the transmission floor
shift assembl ...
