Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT HAZARD WARNING SIGNAL SWITCH

Remove the hazard warning signal switch (see REMOVAL ).

Fig 1: Identifying Hazard Warning Signal Switch Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard resistance

HAZARD WARNING SIGNAL SWITCH

Tester Connection	Switch Condition	Specified Condition
1 - 4	Hazard warning switch ON	Below 1 Ω
1 - 4	Hazard warning switch OFF	10 kΩ or higher

NG: REPLACE HAZARD WARNING SIGNAL SWITCH (see REMOVAL )

OK: Go to next step

CHECK HARNESS AND CONNECTOR (HAZARD WARNING SIGNAL SWITCH-TURN SIGNAL FLASHER AND BODY GROUND)

Disconnect the L3 switch connector.
Disconnect the J29 relay connector.

Fig 2: Identifying Hazard Warning Signal Switch And Turn Signal Flasher Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard resistance

HAZARD WARNING SIGNAL SWITCH-TURN SIGNAL FLASHER AND BODY GROUND

Tester Connection	Condition	Specified Condition
L3-4 - J29-12 (HAZ)	Always	Below 1 Ω
L3-1 - Body ground	Always	Below 1 Ω
L3-4 - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE