Pin Voltage Tests
WARNING: This page is about a different car, the 2003 Lexus RX 300 and 2002 Lexus RX 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 power seat ECU wiring harness connector unless otherwise specified. See CONNECTOR IDENTIFICATION . See POWER SEAT ECU PIN VOLTAGE CHART table.
POWER SEAT ECU PIN VOLTAGE CHART
| Connector & Terminal No. (Symbol), Wire Color | Condition | Standard Voltage |
|---|---|---|
| P18-3 (SSFV) - P18-13 (SGND), Light Green/Red - Brown | Front Vertical Operation | 0 - 8 Volts |
| P18-4 (SSRL) - P18-13 (SGND), Green/Black - Brown | Rear Vertical Operation | 0 - 8 Volts |
| P18-5 (SSRR) - P18-13 (SGND), Violet/White - Brown | Reclining Operation | 0 - 8 Volts |
| P18-6 (PVCC) - P18-13 (SGND), Violet - Brown | Power Seat Operation | 8 Volts |
| P18-7 (FDWN) - Body Ground, Blue/Red | Seat Lowered Using Front Vertical SW | Below 1 Volt |
| P18-7 (FDWN) - Body Ground, Blue/Red | Others | 10-14 Volts |
| P18-8 (IG) - Body Ground, Black/Red | Ignition SW ON | 10-14 Volts |
| P18-9 (SYSB) - P19-7 (GND), Red - White/Black | Always | 10-14 Volts |
| P18-10 (MPX1) - Body Ground, White | Multiplex Communication Circuit Signals | 0-12 Volts |
| P18-10 (MPX1) - Body Ground, White | Others | Resistance (Approx. 2.5 k Ohm) |
| P18-13 (SGND) - Body Ground, Brown | Always | Below 1 Volt |
| P18-14 (SSRS) - P18-13 (SGND), Light Green - Brown | Slide Operation | 0-8 Volts |
| P18-15 (SLDF) - Body Ground, Blue | Seat Moved Forward Using Slide SW | Below 1 Volt |
| P18-15 (SLDF) - Body Ground, Blue | Others | 10-14 Volts |
| P18-16 (SLDR) - Body Ground, Blue/Black | Seat Moved To Rear Using Slide SW | Below 1 Volt |
| P18-16 (SLDR) - Body Ground, Blue/Black | Others | 10-14 Volts |
| P18-17 (LUP) - Body Ground, Blue/White | Seat Raised Using Rear Vertical SW | Below 1 Volt |
| P18-17 (LUP) - Body Ground, Blue/White | Others | 10-14 Volts |
| P18-18 (LDWN) - Body Ground, Blue/Orange | Seat Lowered Using Rear Vertical SW | Below 1 Volt |
| P18-18 (LDWN) - Body Ground, Blue/Orange | Others | 10-14 Volts |
| P18-19 (FUP) - Body Ground, Blue/Yellow | Seat Raised Using Front Vertical SW | Below 1 Volt |
| P18-19 (FUP) - Body Ground, Blue/Yellow | Others | 10-14 Volts |
| P18-21 (RCLF) - Body Ground, Yellow/Red | Seat Moved Forward Using Reclining SW | Below 1 Volt |
| P18-21 (RCLF) - Body Ground, Yellow/Red | Others | 10-14 Volts |
| P18-22 (RCLR) - Body Ground, Yellow/Black | Seat Moved To Rear Using Reclining SW | Below 1 Volt |
| P18-22 (RCLR) - Body Ground, Yellow/Black | Others | 10-14 Volts |
| P19-1 (RCL-) - P19-7 (GND), Yellow/Black - White/Black | Seat Moved To Rear Using Reclining SW | 10-14 Volts |
| P19-1 (RCL-) - P19-7 (GND), Yellow/Black - White/Black | Others | Below 1 Volt |
| P19-2 (RCL+) - P19-7 (GND), Yellow/Red - White/Black | Seat Moved Forward Using Reclining SW | 10-14 Volts |
| P19-2 (RCL+) - P19-7 (GND), Yellow/Red - White/Black | Others | Below 1 Volt |
| P19-3 (SLD-) - P19-7 (GND), Blue/Black - White/Black | Seat Moved To Rear Using Slide SW | 10-14 Volts |
| P19-3 (SLD-) - P19-7 (GND), Blue/Black - White/Black | Others | Below 1 Volt |
| P19-4 (SLD+) - P19-7 (GND), Blue - White/Black | Seat Moved Forward Using Slide SW | 10-14 Volts |
| P19-4 (SLD+) - P19-7 (GND), Blue - White/Black | Others | Below 1 Volt |
| P19-5 (LFT-) - P19-7 (GND), Yellow - White/Black | Seat Lowered Using Rear Vertical SW | 10-14 Volts |
| P19-5 (LFT-) - P19-7 (GND), Yellow - White/Black | Others | Below 1 Volt |
| P19-6 (LFT+) - P19-7 (GND), Yellow/Green - White/Black | Seat Raised Using Rear Vertical SW | 10-14 Volts |
| P19-6 (LFT+) - P19-7 (GND), Yellow/Green - White/Black | Others | Below 1 Volt |
| P19-7 (GND) - Body Ground, White/Black | Always | Below 1 Volt |
| P19-8 (+B) - Body Ground, Blue/Orange | Always | 10-14 Volts |
| P19-9 (FRV-) - P19-7 (GND), Blue/Red - White/Black | Seat Lowered Using Front Vertical SW | 10-14 Volts |
| P19-9 (FRV-) - P19-7 (GND), Blue/Red - White/Black | Others | Below 1 Volt |
| P19-10 (FRV+) - P19-7 (GND), Blue/Yellow - White/Black | Seat Raised Using Front Vertical SW | 10-14 Volts |
| P19-10 (FRV+) - P19-7 (GND), Blue/Yellow - White/Black | Others | Below 1 Volt |