Lexus NX: Terminals Of Ecu
TERMINALS OF ECU
CHECK SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY)
(a) Disconnect the T9 sliding roof ECU (sliding roof drive gear sub-assembly) connector.
(b) Measure the resistance and voltage according to the value(s) in the table below.
| Tester Connection | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| T9-1 (IG) - Body ground | L - Body ground | IG power supply | Power switch off | Below 1 V |
| Power switch on (IG) | 11 to 14 V | |||
| T9-4 (UP) - Body ground | W - Body ground | Slide roof switch (UP) signal | Slide roof switch (UP) off → on | 1 kΩ or higher → Below 100 Ω |
| T9-5 (CLS) - Body ground | B - Body ground | Slide roof switch (CLOSE) signal | Slide roof switch (CLOSE) off → on | 1 kΩ or higher → Below 100 Ω |
| T9-6 (DWN) - Body ground | L - Body ground | Slide roof switch (DOWN) signal | Slide roof switch (DOWN) off → on | 1 kΩ or higher → Below 100 Ω |
| T9-7 (OPN) - Body ground | R - Body ground | Slide roof switch (OPEN) signal | Slide roof switch (OPEN) off → on | 1 kΩ or higher → Below 100 Ω |
| T9-8 (B) - Body ground | W - Body ground | Battery power supply | Power switch off | 11 to 14 V |
| T9-12 (E) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
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Diagnosis System
DIAGNOSIS SYSTEM DESCRIPTION (a) Sliding roof system data and Diagnostic Trouble Codes (DTCs) can be read through the vehicle Data Link Connector 3 (DLC3). When the system seems to be malfunctioning,
Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Sliding Roof / Troub
Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. Th
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Removal
REMOVAL PROCEDURE 1. REMOVE FRONT BUMPER ASSEMBLY Click here 2. REMOVE NO. 3 ENGINE ROOM WIRE Click here 3. REMOVE CLEARANCE LIGHT ASSEMBLY LH (a) for LED Type Side Turn Signal Light: Click here (b) for Bulb Type Side Turn Signal Light: Click here 4. REMOVE CLEARANCE LIGHT ASSEMBLY RH HINT:
Vehicle Identification Malfunction (C1789)
DESCRIPTION
When the absorber control ECU has not acquired the vehicle identification information, DTC C1789 is stored. When the vehicle identification information is correctly acquired, this DTC is cleared. Vehicle identification information is automatically acquired when the system enters test
