Lexus IS250 IS220d GSE20 ALE20 - PARK ASSIST / MONITORING
CLEARANCE SONAR SYSTEM - TERMINALS OF ECU
| CHECK CLEARANCE WARNING ECU |
| Symbols (Terminal No.) | Wiring Color | Terminal Description | Condition | Specified Condition |
| IG (Q37-8) - E (Q37-27) | Y - W-B | IG signal / IG power source | Engine switch on (IG) | 10 to 14 V |
| E (Q37-27) - Body ground | W-B - Body ground | ECU ground | Always | Below 1 Ω |
| S1 (Q37-5) - E1 (Q37-18) | Y - BR | Ultrasonic sensor (Front right sensor) |
Signals are transmitted from ECU to front right sensor (During OFF sensing) | Pulse generation (see waveform 1) |
| S4 (Q37-6) - E4 (Q37-19) | GR- BR | Ultrasonic sensor (Front left sensor) |
Signals are transmitted from ECU to front left center sensor (During OFF sensing) | Pulse generation (see waveform 1) |
| S5 (Q37-2) - E5 (Q37-15) | GR - W | Ultrasonic sensor (Rear right sensor) |
Signals are transmitted from ECU to front right sensor (During OFF sensing) | Pulse generation (see waveform 1) |
| S6 (Q37-4) - E6 (Q37-17) | P - W | Ultrasonic sensor (Rear left sensor) |
Signals are transmitted from ECU to front left sensor (During OFF sensing) | Pulse generation (see waveform 1) |
| S7 (Q37-1) - E7 (Q37-14) | R - W | Ultrasonic sensor (Rear right center sensor) |
Signals are transmitted from ECU to rear right center sensor (During OFF sensing) | Pulse generation (see waveform 1) |
| S8 (Q37-3) - E8 (Q37-16) | G - W | Ultrasonic sensor (Rear left center sensor) |
Signals are transmitted from ECU to rear left center sensor (During OFF sensing) | Pulse generation (see waveform 1) |
| E1 (Q37-18) - Body ground | BR - Body ground | Ultrasonic sensor (Front right sensor) ground |
Always | Bellow 1 Ω |
| E4 (Q37-19) - Body ground | BR - Body ground | Ultrasonic sensor (Front left sensor) ground |
Always | Bellow 1 Ω |
| E5 (Q37-15) - Body ground | W - Body ground | Ultrasonic sensor (Rear right sensor) ground |
Always | Bellow 1 Ω |
| E6 (Q37-17) - Body ground | W - Body ground | Ultrasonic sensor (Rear left sensor) ground |
Always | Bellow 1 Ω |
| E7 (Q37-14) - Body ground | W - Body ground | Ultrasonic sensor (Rear right center sensor) ground |
Always | Bellow 1 Ω |
| E8 (Q37-16) - Body ground | W - Body ground | Ultrasonic sensor (Rear left center sensor) ground |
Always | Bellow 1 Ω |
| CBZ (Q37-9) - E (Q37-27) | O - W-B | Buzzer output | Buzzer sounding | Pulse generation (see waveform 2) |
| M+ (Q37-26) - E (Q37-27) | BR - W-B | BEAN communication | Engine switch on (IG), clearance sonar main switch ON | Pulse generation |
Reference:
Waveform 1
| Item | Content |
| Symbols (Terminal No.) | S1 (Q37-5) - E1 (Q37-18) S4 (Q37-6) - E4 (Q37-19) S5 (Q37-2) - E5 (Q37-15) S6 (Q37-4) - E6 (Q37-17) S7 (Q37-1) - E7 (Q37-14) S8 (Q37-3) - E8 (Q37-16) |
| Tool Setting | 2 V/DIV., 100 μsec./DIV. |
| Condition | Signals are transmitted from ECU to sensor (During OFF sensing) |
Waveform 2
| Item | Content |
| Symbols (Terminal No.) | CBZ (Q37-9) - E (Q37-27) |
| Tool Setting | 2 V/DIV., 1 msec./DIV. |
| Condition | Buzzer sounding |
LEXUS IS250, IS220d / GSE20 ALE20