DESCRIPTION
Detection Item | Symptom | Trouble Area |
---|---|---|
Main Body ECU Communication Stop Mode | Either condition is met:
|
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
Click here
Click here
Click here
HINT:
PROCEDURE
1. | CHECK FOR OPEN IN CAN BUS LINES (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) BRANCH LINE) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the J8 main body ECU (multiplex network body ECU) connector. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
J8-14 (CANH) - J8-13 (CANL) | Cable disconnected from negative (-) battery terminal | 54 to 69 Ω |
NG | ![]() | REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) |
|
2. | CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) |
(a) Remove the main body ECU (multiplex network body ECU).
Click here
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(c) Reconnect the cable to the negative (-) battery terminal.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Condition | Specified Condition |
---|---|---|
MB-30 (ACC) - Body ground | Engine switch on (ACC) | 11 to 14 V |
MB-31 (BECU) - Body ground | Always | 11 to 14 V |
MB-32 (IG) - Body ground | Engine switch on (IG) | 11 to 14 V |
Result | Proceed to |
---|---|
OK | A |
NG (BECU) | B |
NG (ACC) | C |
NG (IG) | D |
NG (GND1) | E |
A | ![]() | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
C | ![]() | GO TO LIGHTING (INT) SYSTEM (ACC SIGNAL CIRCUIT) |
D | ![]() | GO TO LIGHTING (INT) SYSTEM (IG SIGNAL CIRCUIT) |
E | ![]() | GO TO STEP 4 |
|
3. | CHECK HARNESS AND CONNECTOR (BECU SIGNAL CIRCUIT) |
(a) Disconnect the 2C instrument panel junction block assembly connector.
(b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
OK | ![]() | REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR (BECU SIGNAL CIRCUIT) |
4. | CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the 2B instrument panel junction block assembly connector.
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
OK | ![]() | REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT) |
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Airbag System: Front Airbag Sensor Lost Communication (RH) (B1612,B1613)
DESCRIPTION The front airbag sensor RH circuit consists of the airbag sensor assembly and front airbag sensor RH. The front airbag sensor RH detects impacts to the vehicle and sends signals to the airbag sensor assembly to determine if the airbags, pretensioners and selectable force limiter should b ...
Lexus RX (RX 350L, RX450h) 2016-2025 Owners Manual > Multi-information display: Using the multi-information display
Using the content display area
The content display area is operated using the meter control switches.
:Select menu icons
:Change
displayed content,
scroll up/down the
screen and move the
cursor
Press: Enter/Set
Press and hold: Reset
Return to the previous scr ...