TERMINALS OF ECM
CHECK ECM
HINT:
The standard normal voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard normal voltage for that pair of terminals, displayed in the Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| D2-53 (E1) - Body ground | BR - Body ground | Ground | Always | Below 1 Ω |
| A37-1 (BATT) - D2-53 (E1) | G - BR | Battery (for measuring battery voltage and for ECM memory) | Always | 11 to 14 V |
| D2-135 (LIN) - Body ground | B - Body ground | LIN communication line | Engine switch off (while LIN communication stopped) | 10 kΩ or higher |
Problem Symptoms Table
Diagnosis SystemLexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Power Back Door System (w/ Outside Door Control Switch): Power Back Door Warning System does not Operate
DESCRIPTION If the power back door warning system does not operate, there may be a malfunction in one of the following: 1) wireless door lock control system, 2) power back door warning buzzer circuit or 3) multiplex network door ECU. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE:
If the multiple ...
Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Pre-collision System: Vehicle Control History
VEHICLE CONTROL HISTORY NOTICE: Make sure to record any output Vehicle Control History codes before clearing them and checking the Vehicle Control History again. CHECK VEHICLE CONTROL HISTORY (PRE-COLLISION SYSTEM) (a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn ...