DESCRIPTION
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
---|---|---|---|---|
U0199 | Lost Communication with "Door Control Module A" | No communication from the outer mirror control ECU assembly (for front passenger side) continues. |
| HINT: The main body ECU (multiplex network body ECU) stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 1. |
HINT:
This diagnostic procedure is for when DTC U0199 is output by the main body ECU (multiplex network body ECU) (Techstream display: Main Body).
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
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HINT:
PROCEDURE
1. | RECONFIRM DTC OUTPUT |
(a) Reconfirm DTCs.
HINT:
If DTC U1002 is output from Main Body of the main body ECU (multiplex network body ECU), this indicates a sub bus 1 malfunction. Troubleshoot for DTC U1002 and check for malfunctions in sub bus 1.
Body Electrical > Main Body > Trouble Codes Result | Proceed to |
---|---|
DTC U1002 is not output from the main body ECU (multiplex network body ECU) (Techstream display: Main Body) | A |
DTC U1002 is output from the main body ECU (multiplex network body ECU) (Techstream display: Main Body) | B |
B | ![]() | GO TO DIAGNOSTIC PROCEDURE INDICATED BY OUTPUT DTC |
|
2. | CHECK FOR OPEN IN SUB BUS 1 LINES (OUTER MIRROR CONTROL ECU ASSEMBLY (FOR FRONT PASSENGER SIDE) BRANCH LINE) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the M4 outer mirror control ECU assembly (for front passenger side) connector. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
M4-9 (CANP) - M4-8 (CANN) | Cable disconnected from negative (-) battery terminal | 54 to 69 Ω |
NG | ![]() | REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (OUTER MIRROR CONTROL ECU ASSEMBLY (FOR FRONT PASSENGER SIDE)) |
|
3. | CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) |
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(b) Reconnect the cable to the negative (-) battery terminal.
(c) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
OK | ![]() | REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (FOR FRONT PASSENGER SIDE) |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Cylinder Head: Repair
REPAIR CAUTION / NOTICE / HINT HINT:
Use the same procedure for bank 1 and bank 2.
The following procedure is for bank 2.
PROCEDURE 1. REPAIR INTAKE VALVE SEAT NOTICE:
Repair the intake valve seat while checking the seating position.
Release the cutter gradually to make the intake valve ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Telematics System: Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Telematics System DTC No. Detection Item Link U014087 Lost Communication with Body Control Module Missing Message U015587 Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message U016387 Lost Communication ...