On-Vehicle Inspection

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

INSPECT DEFOGGER RELAY (Marking: DEFOG)

Measure the resistance of the DEFOG relay.

Fig 1: Identifying Defogger Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Resistance

STANDARD RESISTANCE

Tester Condition	Condition	Specified Condition
3 - 4	When battery voltage is not applied between terminals	Below 1 Ω
3 - 5	When battery voltage is not applied between terminals	10 kΩ or higher
3 - 5	When battery voltage is applied to terminals 1 and 2	Below 1 Ω

If the result is not as specified, replace the relay.