- P45-29 (CV+) - P45-31 (SGND)
- P45-10 (LCV+) - P45-11 (SGND)
- P45-36 (BCV+) - P45-14 (SGND)
- P45-38 (RCV+) - P45-39 (SGND)
Lexus NX: Terminals Of Ecu
Lexus NX Service Manual / Audio & Visual & Telematics / Park Assist / Monitoring / Panoramic View Monitor System / Terminals Of Ecu
TERMINALS OF ECU
PARKING ASSIST ECU
(a) Disconnect the P44 parking assist ECU connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| P44-1 (+B) - P44-4 (GND1) | L - W-B | Power source signal | Power switch off | 11 to 14 V |
| P44-4 (GND1) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
| P44-3 (IG) - P44-4 (GND1) | G - W-B | IG power source signal | Power switch on (IG) | 11 to 14 V |
| Power switch off | Below 1 V | |||
| P44-2 (ACC) - P44-4 (GND1) | L - W-B | ACC power source signal | Power switch on (ACC) | 11 to 14 V |
| Power switch off | Below 1 V |
(c) Reconnect the P44 parking assist ECU connector.
(d) Measure the voltage, resistance and waveform according to the value(s) in the table below.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| P45-29 (CV+) - P45-31 (SGND) | W - Shielded | Rear television camera assembly display signal input | Power switch on (IG), No. 2 combination switch assembly (panoramic view monitor main switch) on, camera lens not covered, displaying image | Pulse generation (See waveform 1) |
| Power switch on (IG), No. 2 combination switch assembly (panoramic view monitor main switch) on, camera lens covered, blacking out screen | Pulse generation (See waveform 2) | |||
| P45-33 (CB+) - P45-31 (SGND) | B - Shielded | Power source to rear television camera | Power switch on (IG) | 5.5 to 7.05 V |
| P45-6 (RSW+) - P44-4 (GND1) | P - W-B | Terminal required by law | Panoramic image being displayed | 0 to 2 V |
| Panoramic image not being displayed | 5.5 to 7.05 V | |||
| P44-15 (BLSW) - Body ground | R - Body ground | No. 2 combination switch assembly (panoramic view monitor main switch) switch signal | Power switch on (IG), No. 2 combination switch assembly (panoramic view monitor main switch) off | 5.5 to 6.5 V |
| Power switch on (IG), No. 2 combination switch assembly (panoramic view monitor main switch) on | Below 1 V | |||
| P45-31 (SGND) - P44-4 (GND1) | Shielded - W-B | Rear television camera assembly ground (shield) | Always | Below 1 Ω |
| P45-30 (CV-) - P45-31 (SGND) | R - Shielded | Rear television camera assembly ground | Always | Below 1 Ω |
| P45-34 (LCV-) - P45-11 (SGND) | W - Shielded | Side television camera assembly LH ground | Always | Below 1 Ω |
| P45-10 (LCV+) - P45-35 (LGND) | R - G | Side television camera assembly LH display signal input | Power switch on (IG), No. 2 combination switch assembly (panoramic view monitor main switch) on, camera lens not covered, displaying image | Pulse generation (See waveform 1) |
| Power switch on (IG), No. 2 combination switch assembly (panoramic view monitor main switch) on, camera lens covered, blacking out screen | Pulse generation (See waveform 2) | |||
| P45-11 (SGND) - P44-4 (GND1) | Shielded - W-B | Side television camera assembly LH ground (shield) | Always | Below 1 Ω |
| P45-12 (LCB+) - P45-11 (SGND) | B - Shielded | Power source to side television camera assembly LH | Power switch on (IG) | 5.5 to 7.05 V |
| P45-13 (BCV-) - P45-14 (SGND) | W - Shielded | Front television camera assembly ground | Always | Below 1 Ω |
| P45-36 (BCV+) - P45-14 (SGND) | R - Shielded | Front television camera assembly display signal input | Waveform 1: Power switch on (IG), No. 2 combination switch assembly (panoramic view monitor main switch) on, camera lens not covered, displaying image | Pulse generation (See waveform 1) |
| Waveform 2: Power switch on (IG), No. 2 combination switch assembly (panoramic view monitor main switch) on, camera lens covered, blacking out screen | Pulse generation (See waveform 2) | |||
| P45-14 (SGND) - P44-4 (GND1) | Shielded - W-B | Front television camera assembly ground (shield) | Always | Below 1 Ω |
| P45-15 (BCB+) - P45-14 (SGND) | B - Shielded | Power source to front television camera | Power switch on (IG) | 5.5 to 7.05 V |
| P45-16 (RCV-) - P45-39 (SGND) | W - Shielded | Side television camera assembly RH ground | Always | Below 1 Ω |
| P45-38 (RCV+) - P45-39 (SGND) | R - Shielded | Side television camera assembly RH display signal input | Waveform 1: Power switch on (IG), No. 2 combination switch assembly (panoramic view monitor main switch) on, camera lens not covered, displaying image | Pulse generation (See waveform 1) |
| Waveform 2: Power switch on (IG), No. 2 combination switch assembly (panoramic view monitor main switch) on, camera lens covered, blacking out screen | Pulse generation (See waveform 2) | |||
| P45-39 (SGND) - P44-4 (GND1) | Shielded - W-B | Side television camera assembly RH ground (shield) | Always | Below 1 Ω |
| P45-40 (RCB+) - P45-39 (SGND) | B - Shielded | Power source to side television camera assembly RH | Power switch on (IG) | 5.5 to 7.05 V |
(e) Using an oscilloscope, check the waveform.
| *a | Waveform 1 | *b | Waveform 2 |
| *c | Synchronization Signal | *d | Video Waveform |
(1) Waveform 1
Measurement Condition| Item | Content |
|---|---|
| Terminal No. (Symbol) | |
| Tool Setting | 200 mV/DIV., 50 μsec./DIV. |
| Condition |
|
HINT:
- The video waveform changes according to the image sent by the television camera assembly.
- The video waveform is constantly output when the power switch is on (ACC).
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RADIO RECEIVER ASSEMBLY (w/ Navigation System)
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