Pin Voltage Tests
WARNING: This page is about a different car, the 2002 Lexus GS 430 and 2002 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
Using a DVOM connected to ground, backprobe to measure voltage or resistance at appropriate terminal at moon roof ECU harness connector unless otherwise specified. See Fig 1 and MOON ROOF ECU PIN VOLTAGE CHART table.
MOON ROOF ECU PIN VOLTAGE CHART
| Terminal No. (Symbols), Wiring Color | Condition | Standard Voltage |
|---|---|---|
| M5-2 (MPX1) - Body Ground, Orange | Signal Between Moon Roof Control ECU & Body ECU | 10-14 Volts |
| M5-2 (MPX1) - Body Ground, Orange | Others | Resistance (Approx. 2500 Ohms) |
| M5-3 (DWN) - M5-7 (E), Red/White - White/Black | Moon Roof Control Switch TILT DOWN | 10-14 Volts |
| M5-3 (DWN) - M5-7 (E), Red/White - White/Black | Others | Less Than 1 Volt |
| M5-4 (UP) - M5-7 (E), Red/Yellow - White/Black | Moon Roof Control Switch TILT UP | 10-14 Volts |
| M5-4 (UP) - M5-7 (E), Red/Yellow - White/Black | Others | Less Than 1 Volt |
| M5-5 (B) - M5-7 (E), Blue/Orange - White/Black | Always | 10-14 Volts |
| M5-7 (E) - Body Ground, White/Black | Always | Less Than 1 Volt |
| M5-8 (IG) - M5-7 (E), Black/Red - White/Black | Ignition Switch ON | 10-14 Volts |
| M5-8 (IG) - M5-7 (E), Black/Red - White/Black | Ignition Switch OFF Or ACC | Less Than 1 Volt |
| M5-9 (OPN) - M5-7 (E), Pink - White/Black | Moon Roof Control Switch OPEN | 10-14 Volts |
| M5-9 (OPN) - M5-7 (E), Pink - White/Black | Others | Less Than 1 Volt |
| M5-10 (CLS) - M5-7 (E), Green/Yellow - White/Black | Moon Roof Control Switch CLOSE | 10-14 Volts |
| M5-10 (CLS) - M5-7 (E), Green/Yellow - White/Black | Others | Less Than 1 Volt |