Steering Pad Switch Circuit: Inspection-Procedure

WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

Check steering pad switch using hand-held tester.

PREPARATION:

Connect the hand-held tester to the DLC3.

CHECK:

Check the steering pad switch using DATA LIST.

OK:

Meter multi-information display control switch

METER MULTI-INFORMATION DISPLAY CONTROL SWITCH SPECIFICATION

Switch name (Tester display)	No pressing	Pressing
DISP1 (MULTI FNC SW)	OFF	ON
DISP2 (MULTI MODE SW)	OFF	ON
Reset switch (MULTI RESET SW)	OFF	ON

Horn switch

HORN SWITCH SPECIFICATION

Switch name (Tester display)	No pressing	Pressing
Horn switch (HORN SW)	OFF	ON

Audio control switch

AUDIO CONTROL SWITCH SPECIFICATION

Switch name (Tester display)	No pressing	Pressing
Mode switch (AV MODE SW)	OFF	ON
Select down switch (AV SEL DOWN SW)	OFF	ON
Select up switch (AV SEL UP SW)	OFF	ON
Volume down switch (AV VOL DOWN SW)	OFF	ON
Volume up switch (AV VOL UP SW)	OFF	ON
Volume set switch (AV VOL SET SW)	OFF	ON

Cellular mobile telephone control switch

CELLULAR MOBILE TELEPHONE CONTROL SWITCH SPECIFICATION

Switch name (Tester display)	No pressing	Pressing
Voice hook switch (VOICE HOOK SW)	OFF	ON

OK : Proceed to next circuit inspection shown on problem symptom table (See PROBLEM SYMPTOMS TABLE ).
NG : Replace the steering pad switch (See REMOVAL ).