Lexus NX: Terminals Of Ecu
TERMINALS OF ECU
OCCUPANT DETECTION ECU
HINT:
Since the occupant detection ECU uses waterproof connectors, the voltage and waveform cannot be inspected directly. Standard voltage and waveforms are indicated for reference only.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| f14-1 (SVC1) - f14-5 (SGD1) | R - G | Front occupant classification sensor LH power supply | Power switch on (IG) | 4.9 to 5.1 V |
| f14-2 (SVC3) - f14-6 (SGD3) | GR - W | Rear occupant classification sensor LH power supply | Power switch on (IG) | 4.9 to 5.1 V |
| f14-3 (SIG1) - f14-5 (SGD1) | P - G | Front occupant classification sensor LH signal | Power switch on (IG) | Pulse generation |
| f14-4 (SIG3) - f14-6 (SGD3) | SB - W | Rear occupant classification sensor LH signal | Power switch on (IG) | Pulse generation |
| f14-5 (SGD1) - f15-3 (GND) | G - W-B | Front occupant classification sensor LH ground | Always | Below 1 V |
| f14-6 (SGD3) - f15-3 (GND) | W - W-B | Rear occupant classification sensor LH ground | Always | Below 1 V |
| f15-1 (+B) - f15-3 (GND) | W - W-B | Power source (+B) | Power switch off | 11 to 14 V |
| f15-2 (DIA) | GR | Diagnosis (DLC3) | -* | -* |
| f15-3 (GND) - Body ground | W-B - Body ground | Ground | Always | Below 1 V |
| f15-4 (FSR-) - f15-3 (GND) | LG - W-B | Airbag ECU assembly communication signal | Always | Below 1 V |
| f15-5 (BGND) - f15-3 (GND) | P - W-B | Front Passenger side buckle switch ground | Always | Below 1 V |
| f15-6 (IG2) - f15-3 (GND) | B - W-B | Power source (IG) | Power switch on (IG) | 11 to 14 V |
| f15-7 (FSR+) - f15-4 (FSR-) | L - LG | Airbag ECU assembly communication signal | Power switch on (IG) | Pulse generation |
| f15-8 (BSW) - f15-5 (BGND) | G - P | Front Passenger side buckle switch signal | Always | Pulse generation |
- *: As this is a line that is connected to other systems, voltage changes according to the systems that are connected.
AIRBAG ECU ASSEMBLY
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Diagnosis System
DIAGNOSIS SYSTEM CHECK DLC3 (a) Check the DLC3. Click here FUNCTION OF PASSENGER AIRBAG ON/OFF INDICATOR (a) Initial check (1) Turn the power switch on (IG). (2) The passenger airbag ON/OFF indicat
Dtc Check / Clear
DTC CHECK / CLEAR DTC CHECK (a) Turn the power switch off. (b) Connect the Techstream to the DLC3. (c) Turn the power switch on (IG). (d) Turn the Techstream on. (e) Enter the following menus: Body El
Fail-safe Chart
FAIL-SAFE CHART FAIL SAFE FUNCTION (a) The following chart shows the status of the controls when the system is normal and malfunctioning.
The passenger airbag ON/OFF indicator ("ON" and "OFF") come
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Parts Location
PARTS LOCATION ILLUSTRATION *1 FORWARD RECOGNITION CAMERA *2 MILLIMETER WAVE RADAR SENSOR ASSEMBLY ILLUSTRATION *1 INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - ECU-IG NO.2 FUSE *2 DLC3
Removal
REMOVAL PROCEDURE 1. REMOVE DOOR SCUFF PLATE ASSEMBLY LH Click here 2. REMOVE COWL SIDE TRIM BOARD LH Click here 3. REMOVE INSTRUMENT SIDE PANEL LH Click here 4. REMOVE NO. 1 INSTRUMENT PANEL SAFETY PAD SUB-ASSEMBLY Click here 5. REMOVE REAR CONSOLE ARMREST ASSEMBLY Click here
