On-Vehicle Service; Printed Heater Check; Defogger Relay Continuity Check; Defogger Switch - Mitsubishi Lancer Evolution-VII Workshop Manual

Normal characteristics of print heater
Voltage
A (Mid point): Approx. 6 V
(+) Terminal
Print heater length
Abnormal characteristics of print heater
Voltage
(+) Terminal
Print heater length
Defogger relay
CHASSIS ELECTRICAL -

ON-VEHICLE SERVICE

PRINTED HEATER CHECK

(1) With engine running at 2,000 rpm and battery in charging
mode, check print heater for normal operation.
(2) With defogger switch in "ON" position, use circuit tester
to measure voltage of individual print heaters at the center
point A of rear window glass. When the tester indicates
approx. 6V, the print heater is evaluated normal.
(–) Terminal
(3) When the measured value at Position A is 12V, open
circuit occurs between Position A and minus terminal.
In this case, carefully move test bar to minus terminal
side to detect a rapid voltage drop point (0V). This voltage
drop point indicates open circuit section.
(4) When voltage at Position A is 0V, open circuit occurs
Open section
between Position A and plus terminal. According to the
previous step, detect a rapid voltage increase point (12V).
(–) Terminal

DEFOGGER RELAY CONTINUITY CHECK

Battery voltage
De-energized
Energized
04Z0001

DEFOGGER SWITCH

REMOVAL, INSTALLATION AND CHECK
Refer to GROUP 55 - Heater Control Assembly, A/C Switch
and Fresh/Recirculated Air Switch.
Defogger
y g
Terminal No.
1 3
54A-43
\
4 5