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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Rear Door Courtesy Switch Circuit
DESCRIPTION The fold seat control ECU receives the switch operation signal, driving condition signal and rear door open/close signal. Then the fold seat control ECU actives the rear seat according to these signals. WIRING DIAGRAM PROCEDURE 1. INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY
Short in Sensor with Motor Power Supply Circuit (B2658)
DESCRIPTION This DTC is stored when a power seat motor operates (a position control sensor is being supplied with power) and the power supply voltage does not rise to the specified value. DTC No. Detection Item DTC Detection Condition Trouble Area B2658 Short in Sensor with Motor Powe
