Ignition Switch Circuit
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2001 Lexus RX 300, 2001 Lexus LX 470, 2001 Lexus LS 430, 2001 Lexus IS 300, and 2001 Lexus GS 430. However, it is still accessible from the selected car via links, so may be relevant.
Turn ignition switch to ON position. Using DVOM connected to ground, measure voltage by backprobing ignition switch harness connector terminals with ignition switch in specified position. See appropriate IGNITION SWITCH CIRCUIT VOLTAGE table. See Fig 1. If battery voltage does not exist at each terminal, repair wiring harness or replace components as necessary. If battery voltage exists at each terminal, check ignition switch. See IGNITION SWITCH under COMPONENT TESTS.
IGNITION SWITCH CIRCUIT VOLTAGE (ES300)
| Check Voltage Between Ground & Terminal No. | Switch Position |
|---|---|
| 1 | START |
| 2 | Any Position |
| 3 | ACC Or ON |
| 4 | ON |
| 6 | ON |
| 7 | Any Position |
| 8 | START |
IGNITION SWITCH CIRCUIT VOLTAGE (GS300, GS430, IS300, LX470 & RX300)
| Check Voltage Between Ground & Terminal No. | Switch Position |
|---|---|
| 2 | Any Position |
| 3 | ACC Or ON |
| 4 | ON |
| 6 | ON Or START |
| 7 | Any Position |
| 8 | START |