Multi Display
WARNING: This page is about a different car, the 2003 Lexus GS 430 and 2003 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
ECU TERMINALS REFERENCE CHART
| Symbols (Terminal No.) | Condition | STD Voltage (V) | Problem symptom when open circuit is detected. |
|---|---|---|---|
| Problem symptoms when short circuit is detected. | |||
| +B1 <--> GNDI (M3-1 <--> M3-6) | Constant | 10-14 | Navigation system does not operate. |
| IG <--> GNDI (M3-2 <--> M3-6) | Ignition switch ON | 10-14 | Navigation system does not operate. |
| ACC <--> GNDI (M3-4 <--> M3-6) | Ignition switch ACC | 10-14 | Navigation system does not operate. |
| GND1 <--> Body ground (M3-6 <--> Body ground) | Constant | Continuity | Navigation system does not operate. |
| Navigation system is normal. | |||
| TX1+ (M4-3) | AVC-LAN communication circuit | - | Navigation system does not operate. |
| SPD <--> GND1 (M4-5 <--> M3-6) | Ignition switch ON, and driving wheel rotated smoothly | Repeatedly changes from below 1 to 9 V | Fuel efficiency cannot be calculated. |
| TX3+ <--> GND1 (M4-4 <--> M3-6) | Ignition switch ACC or ON | About 2.5 | Screen is disorder. |
| TX1-(M4-10) | AVC-LAN communication circuit | - | Navigation system does not operate. |
| TX3-<--> GND1 (M4-11 <--> M3-6) | Ignition switch ACC or ON | About 2.5 | Screen is disorder. |
| PKB <--> GND1 (M4-13 <--> M3-6) | Ignition switch ON, and parking brake switch ON (parking brake pedal released) | 5 | The system cannot enter Diagnostic system mode. |
| Navigation system is normal | |||
| TC <--> GND1 (M4-14 <--> M3-6) | Ignition switch OFF and connect terminals TC and E1 of check connector | Continuity | Navigation system is normal. |
| The system does not exit Service check mode. | |||
| VR <--> VG (M8-1 <--> M8-6) | Constant | Continuity | Screen noise or other types of noise occur. |
| R <--> VG (M8-2 <--> M8-6) | Diagnosis display check screen is white (Using an oscilloscope) | 0.7 +/- 0.1 *2 | Screen color turns to blue |
| B <--> VG (M8-3 <--> M8-6) | Diagnosis display check screen is white (Using an oscilloscope) | 0.7 +/- 0.1 *2 | Screen color turns to yellow |
| G <--> VG (M8-7 <--> M8-6) | Diagnosis display check screen is white (Using an oscilloscope) | 0.7 +/- 0.1 *2 | Screen color turns to red-purple. |
| SYNC <--> VG (M8-8 <--> M8-6) | Display ON (Using an oscilloscope) | 0.5-1.3*1 | Screen is in disorder |