Mitsubishi Electric Lancer Evolution-VII Workshop Manual page 830

Code No. 73 Directional control valve (left) system
This code is output when the directional control valve (left) control circuit is open-
or short-circuited.
<Vehicles with ACD + AYC>
Measure at directional control valve
(left) connector F-25.
D Disconnect the connector and
measure at the directional control
valve side.
D Resistance between 1 and 2
OK: 19 - 21 Ω or less
OK
Measure at directional control valve
(left) connector F-25.
D Disconnect the connector and
measure at the directional control
valve side.
D Resistance between 1 and body
earth
OK: 2 Ω or less
OK
Check the following connectors:
C-44, C-130*, C-134, F-24, F-25
OK
Check the trouble symptom.
NG
Checktheharnessbetweendirectional
control valve (left) and 4WD-ECU.
OK
Replace 4WD-ECU.
<Vehicles with ACD>
Measure at 4WD-ECU connector
C-43.
D Disconnect the connector and
measure at the harness side.
D Resistance between 50 and body
earth
OK: 2 Ω or less
OK
Check the following connector:
C-43
OK
Replace 4WD-ECU.
REAR AXLE -
Troubleshooting <AYC>
NG
Replace the hydraulic unit. (Refer to
P27B-61.)
NG
Check the following connectors:
F-25, F-24
Check the trouble symptom.
Check and repair the harness between
directional control valve (left) and body
earth.
NG
Repair
*: L.H. drive vehicles
NG
Repair
NG
Check the following connector:
C-43
Check and repair the harness between
4WD-ECU and body earth.
NG
Repair
Probable cause
D Defective directional control valve (left)
D Defective harness or connector
D Defective 4WD-ECU
NG
OK
NG
NG
OK
NG
27B-13
Repair
Repair
Repair