DESCRIPTION
This DTC is stored when LIN communication between the multiplex network master switch assembly and main body ECU (multiplex network body ECU) stops for 10 seconds or more.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
---|---|---|---|
B1206 | P/W Master Switch Communication Stop | No communication between multiplex network master switch assembly and main body ECU (multiplex network body ECU) for 10 seconds or more. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
PROCEDURE
1. | INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
(a) Remove the instrument panel junction block assembly.
Click here
*a | Component without harness connected (Instrument Panel Junction Block Assembly) | - | - |
(b) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
(c) Measure the resistance according to the value(s) in the table below.
HINT:
This inspection is to check the LIN communication line in the instrument panel junction block assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU).
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
2D-25 - MB-16 (LIN2) | Always | Below 1 Ω |
NG | ![]() | REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
|
2. | CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY) |
(a) Disconnect the N7 multiplex network master switch assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
NOTICE:
Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the engine switch from on (IG) to off and wait for 180 seconds or more without operating any switches.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
2D-25 - N7-17 (LIN1) | Engine switch off | Below 1 Ω |
N7-17 (LIN1) or 2D-25 - Body ground | Engine switch off | 10 kΩ or higher |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. | CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY - BATTERY, BODY GROUND) |
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Condition | Specified Condition |
---|---|---|
N7-11 (B) - N7-12 (E) | Always | 11 to 14 V |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
N7-12 (GND) - Body ground | Always | Below 1 Ω |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
4. | REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY |
(a) Replace the multiplex network master switch assembly.
Click here
|
5. | CHECK FOR DTC |
(a) Clear the DTCs.
Click here
(b) Recheck for DTCs.
Body Electrical > Main Body > Trouble CodesOK:
DTC B1206 is not output.
OK | ![]() | END (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY WAS DEFECTIVE) |
NG | ![]() | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Power Window Control System: Key-off Operation Function Operates even if Operating Conditions are not Satisfied
DESCRIPTION When the front doors are closed, each power window regulator motor assembly can be operated for approximately 45 seconds after the engine switch is turned from on (IG) to off by receiving operation permission signals from the main body ECU (multiplex network body ECU). However, when appr ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Rear Brake: Inspection
INSPECTION PROCEDURE 1. INSPECT PAD LINING THICKNESS (a) Using a ruler, measure the rear disc brake pad lining thickness. Standard Thickness: 9.5 mm (0.374 in.) Minimum Thickness: 1.0 mm (0.0394 in.) If a rear disc brake pad lining thickness is less than the minimum thickness, replace the rear ...