Section 258 (Stop Lamp System): Inspection

WARNING: This page is about a different car, the 2003 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT STOP LIGHT SWITCH CONTINUITY

SWITCH POSITION SPECIFIED CONDITION

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.

Fig 1: Identifying Stop Light Switch Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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: Identifying Hi-Mounted Stop Light Assembly Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT STOP LIGHT SWITCH CIRCUIT (See page DI-688)

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

Fig 3: Identifying Stop Light Switch Connector Terminals

TESTER CONNECTION SPECIFIED CONDITION

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

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