Diagnosis System Mode

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.

HINT:

Diagnosis System Mode is operated as follows.

Fig 1: Identifying Diagnosis System Mode Flow Chart

DIAGNOSIS START-UP
To start the diagnosis menu, there are 3 ways: using a diagnosis check wire and using a switch.
START-UP BY SWITCH OPERATION
(light control switch)
1. Vehicle speed is 0 km/h (0 mph).
2. Parking brake switch is pressed.
3. While pressing "INFO" switch, by turning the light control switch to OFF, TAIL, OFF, TAIL, and OFF the system is started up.
START-UP BY SWITCH OPERATION (touch panel)
1. Vehicle speed is 0 km/h (0 mph).
2. Parking brake switch is pressed.
3. Press the "INFO" switch to display the Screen Adjustment screen.
  
  Fig 2: Identifying INFO Switch
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Repeatedly touch the upper and lower bottom parts of the left end of the screen 3 times.
Fig 3: Identifying Concealed Touch Switch
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
FINISHING DIAGNOSIS SYSTEM MODE
Turn the ignition switch from ACC to OFF to finish the mode. If it is started by switch operation.