Section 1002 (Stop Lamp System): Inspection

WARNING: This page is about a different car, the 2004 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT STOP LIGHT SWITCH CONTINUITY

Fig 1: Inspecting Stop Light Switch Continuity

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

STOP LIGHT SWITCH TERMINALS CONTINUITY

Switch position	Tester connection	Specified condition
Switch pin pushed in (Pedal released)	1-2	Continuity
Switch pin free (Pedal depressed)	1-2	No continuity
Switch pin free (Pedal depressed)	3-4	Continuity
Switch pin pushed in (Pedal released)	3-4	No continuity

If continuity is not as specified, replace the switch.

w/ Spoiler:
INSPECT HI-MOUNTED STOP LIGHT ASSEMBLY CONTINUITY

Using the ohmmeter, check that continuity exists between terminals.

If continuity is not as specified, replace the bulb or light assembly.

Fig 2: Inspecting Hi-Mounted Stop Light Assembly Continuity (W/Spoiler)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT STOP LIGHT SWITCH CIRCUIT (See CIRCUIT INSPECTION )

Disconnect the connector from the switch and inspect the connector on the wire harness side, as shown in Fig 3 .

Fig 3: Inspecting Stop Light Switch Circuit

STOP LIGHT SWITCH CONNECTOR TERMINALS VOLTAGE

Tester connection	Condition	Specified condition
2 - Ground	Always	Battery Positive Voltage

If circuit is not as specified, inspect the power source or wire harness.