Section 266 (Audio & Visual System): Inspection

WARNING: This page is about a different car, the 2003 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT MAIN SWITCH ASSY

Fig 1: Identifying Main Switch Assy Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Inspect the continuity between terminal at the each switch position shown in the chart.

SWITCH OPERATION SPECIFIED CONDITION

Switch operation	Tester connection	Specified condition
OFF	3 <==> 4	No continuity
ON	3 <==> 4	Continuity

If continuity is not as specified, replace the main switch assy.

Inspect the bulb state when connecting the battery to each terminal.

INSPECTION ITEM SPECIFIED CONDITION

Inspection item	Battery connection	Specified condition
Indicator	Battery positive terminal <==> 3 Battery negative terminal <==> 6	Comes on
Illumination	Battery positive terminal <==> 1 Battery negative terminal <==> 2	Comes on

If operation is not as specified, check the faulty bulb.

Inspect continuity of the bulb by connecting the tester as shown in Fig 2 .
If continuity exists, replace the main switch assy.

If no continuity exists, replace the bulb.

Fig 2: Inspecting Continuity Of Bulb By Connecting Tester
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT POWER POINT SOCKET RELAY

Fig 3: Identifying Power Point Socket Relay Terminal

Inspect continuity between terminal at the each switch position shown in the chart.

TESTER CONNECTION SPECIFIED CONDITION

Condition	Tester connection	Specified condition
Always	1 <==> 2	Continuity
Always	3 <==> 5	No continuity
Apply B+ between terminal 1 and 2	3 <==> 5	Continuity

If continuity is not as specified, replace the point socket relay