DESCRIPTION
Detection Item | Symptom | Trouble Area |
---|---|---|
Clearance Warning ECU Communication Stop Mode | Either condition is met:
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WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
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HINT:
PROCEDURE
1. | CHECK FOR OPEN IN CAN BUS LINES (CLEARANCE WARNING ECU ASSEMBLY BRANCH LINE) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the J38 clearance warning ECU assembly connector.
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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NG | REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY) |
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2. | CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) |
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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(b) Reconnect the cable to the negative (-) battery terminal.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Condition | Specified Condition |
---|---|---|
J38-1 (IG) - Body ground | Engine switch on (IG) | 11 to 14 V |
OK | REPLACE CLEARANCE WARNING ECU ASSEMBLY |
NG | REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Lighting System: ACC Signal Circuit
DESCRIPTION This circuit detects the engine switch on (ACC) or off condition, and sends it to the main body ECU (multiplex network body ECU). WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
Before r ...
Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Smart Access System With Push-button Start (for Start Function): Lost Communication with ECM / PCM (U0100,U0140,U0142,U0155,U1117)
DESCRIPTION These DTCs are stored when there is a CAN communication malfunction between the certification ECU (smart key ECU assembly), ECM, main body ECU (multiplex network body ECU) or combination meter assembly, and data from the option connector (bus buffer ECU) cannot be received. DTC No. ...