Lexus IS250 IS220d GSE20 ALE20 - PARK ASSIST / MONITORING
PARKING ASSIST MONITOR SYSTEM - TERMINALS OF ECU
| TELEVISION CAMERA ASSEMBLY |
Disconnect the Q43 camera connector.
Measure the voltage and resistance between each terminal of the wire harness side connector.
| Symbols (Terminal No.) | Wiring Color | Terminal Description | Condition | Specified value |
| CGND (Q43-3) - Body ground | W - Body ground | Ground | Always | Below 1 Ω |
| CB+ (Q43-4) - CGND (Q43-3) | B - W | Power source | Engine SW on (IG), shift lever R position | Approx. 6 V |
If the result is not as specified, there may be a malfunction on the wire harness side.
Reconnect the Q43 camera connector.
Measure the voltage and waveform between each terminal of the connector.
| Symbols (Terminal No.) | Wiring Color | Terminal Description | Condition | Specified value |
| CV+ (Q43-2) - CV- (Q43-1) | R - Shielded | Display signal | Engine SW on (IG), shift lever R position | See waveform 1 |
If the result is not as specified, the camera may have a malfunction.
Reference:
Oscilloscope waveform
Waveform 1
| Item | Content |
| Measurement terminal | CV+ - CV- |
| Measurement setting | 0.2 V/DIV., 0.2 μsec./DIV. |
| Condition | Engine switch on (IG), shift lever reverse position |
| TELEVISION CAMERA ECU |
Disconnect the J92 and J93 connectors.
Measure the voltage and resistance between each terminal of the wire harness side connector.
| Symbols (Terminal No.) | Wiring Color | Terminal Description | Condition | Specified value |
| REV (J92-3) - GND1 (J93-8) | Y - W-B | Reverse signal | Engine switch on (IG), shift position is except reverse | Below 1 V |
| REV (J92-3) - GND1 (J93-8) | Y - W-B | Reverse signal | Engine switch on (IG), shift position is reverse | 10 to 14 V |
| CANL (J92-6) - Body ground | W - Body ground | CAN control bus | Always | 10 kΩ or higher |
| CANH (J92-7) - Body ground | L - Body ground | CAN control bus | Always | 10 kΩ or higher |
| +B (J93-1) - GND1 (J93-8) | R - W-B | Power source | Always | 10 to 14 V |
| IG (J93-3) - GND1 (J93-8) | B - W-B | IG signal input | Engine switch on (IG) | 10 to 14 V |
| ACC (J93-4) - GND1 (J93-8) | O - W-B | Accessory (ON) | Engine switch off | Below 1 V |
| ACC (J93-4) - GND1 (J93-8) | O - W-B | Accessory (ON) | Engine switch on (ACC) | 10 to 14 V |
| GND1 (J93-8) - Body ground | W-B - Body ground | Ground | Always | Below 1 V |
If the result is not as specified, there may be a malfunction on the wire harness side.
Reconnect the J92 and J93 connectors.
Measure the voltage and waveform between each terminal of the connector.
| Symbols (Terminal No.) | Wiring Color | Terminal Description | Condition | Specified value |
| CV- (J92-19) - GND1 (J93-8) | Shielded - W-B | Television camera ground (Shielded) | Always | Below 1 V |
| CV+ (J92-20) - GND1 (J93-8) | R - W-B | Television camera display signal input | Engine switch on (IG), shift lever in reverse | Pulse generation Refer to waveform 1 |
| TX- (J92-28) - GND1 (J93-8) | R - W-B | AVC-LAN communication signal | Engine switch on (ACC) | 2 to 3 V |
| TX+ (J92-29) - GND1 (J93-8) | BR - W-B | AVC-LAN communication signal | Engine switch on (ACC) | 2 to 3 V |
| CGND (J92-39) - GND1 (J93-8) | W - W-B | Television camera ground | Always | Below 1 V |
| CB+ (J92-40) - GND1 (J93-8) | B - W-B | Power source to television camera | Engine switch on (IG), shift lever in reverse position | Approx. 6 V |
| GVI+ (q3-1) - GND1 (J93-8) | - | Digital image signal (Input) | Navigation display is on | Pulse generation |
| GVI- (q3-2) - GND1 (J93-8) | - | Digital image signal (Input) | Navigation display is on | Pulse generation |
| GVG1 (q3-3) - Body ground | - | Ground | Always | Below 1 V |
| GVO+ (w2-1) - GND1 (J93-8) | - | Digital image signal (Output) | Navigation or television camera display is on | Pulse generation |
| GVO- (w2-2) - GND1 (J93-8) | - | Digital image signal (Output) | Navigation or television camera display is on | Pulse generation |
| GVG1 (w2-3) - Body ground | - | Ground | Always | Below 1 V |
Reference:
Oscilloscope waveform
Waveform 1
| Item | Content |
| Measurement terminal | CV+ - GND1 |
| Measurement setting | 0.2 V/DIV., 0.2 μsec./DIV. |
| Condition | Engine switch on (IG), Shift lever reverse position |
| MULTI-DISPLAY |