On-Vehicle Inspection

CHECK DEFOGGER (DEF) RELAY

NOTE:

When cleaning the glass, wipe the glass along the wire using a soft, dry cloth. Take care not to damage the defogger wires.
Do not use detergents or glass cleaners that have abrasive ingredients.
When measuring voltage, wrap a piece of tin foil around the tip of the negative (-) tester probe and press the foil against the wire with your finger, as shown in Fig 1.

Fig 1: Pressing Foil Against Wire With Your Finger

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage.

Standard voltage

TERMINALS VOLTAGE SPECIFICATION

Terminal Connection	Condition	Specified Condition
1J-2 - Body ground	Power switch ON (IG) Defogger switch ON	10 to 14 V
1J-2 - Body ground	Power switch ON (IG) Defogger switch OFF	0 V

If the result is not as specified, the driver side junction block may have a malfunction.

Fig 2: Identifying Driver Side Junction Block Connector