Defogger Relay

ON-VEHICLE INSPECTION





1. INSPECT MAIN BODY ECU (DEFOGGER RELAY)
a. Remove the DEF fuse.
b. Using an ohmmeter, measure the resistance between the terminals of the DEF fuse.

Standard Resistance:
Below 1 Ohm

c. Install the DEF fuse.
d. Using an ohmmeter, measure the resistance between terminals 4Q-12 and 4Q-4 of the main body ECU connector.

Standard Resistance:
Below 1 Ohm

e. Turn the ignition switch ON.
f. Turn the defogger switch ON.
g. Using a voltmeter, measure the voltage between terminal 4F-2 of the main body ECU connector and body ground.

Standard Voltage:
10 to 4 V