Mitsubishi Lancer Evolution VI - Dual Pressure Switch Simple Check; Power Relay Check

HEATER AND MANUAL AIR CONDITIONER – On-vehicle Service
55-13
DUAL PRESSURE SWITCH SIMPLE CHECK
Measure the high-pressure side pressure. If there is a
continuity between the dual pressure switch terminals with
the dual pressure switch in ON condition as shown in the
graph at left, the switch is in good condition. If not, it is faulty.
Replace the switch.
POWER RELAY CHECK
BLOWER RELAY
Battery voltage Terminal No.
1 3 2 5
Power is not supplied
Power is supplied
Dual pressure switch
ON
Pressure
196 ± 20 221 2,354 ± 196 2,942 ± 196
OFF
kPa
Blower relay