Hazard Warning Switch: Inspection

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT HAZARD WARNING SWITCH

Inspect the hazard warning switch LED illumination.

Apply battery voltage to the connector, and check the LED illumination condition.

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Measurement Condition	Specified Condition
Battery positive (+) → Terminal 1 (ILL+) Battery positive (-) → Terminal 5 (ILL-)	Light illuminates

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

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester Connection	Switch Condition	Specified Condition
7 (HAZ) - 6 (GND)	Hazard warning signal switch OFF	10 kΩ or higher
7 (HAZ) - 6 (GND)	Hazard warning signal switch ON	Below 1 Ω

Fig 2: Identifying Hazard Warning Signal Switch Connector GND And HAZ Terminals

If the result is not as specified, there may be a malfunction on the switch.