Mitsubishi Electric Lancer Evolution-VII Workshop Manual page 831

27B-14
INSPECTION CHART FOR TROUBLE SYMPTOMS
Trouble symptom
Communication between MUT-II and the whole system is not possible.
Communication between MUT-II and 4WD-ECU is not possible.
3 ACD mode indicator lamps do not light up when the ignition key is turned to "ON"
(engine stationary).
3 ACD mode indicator lamps remain lit up after the engine has started.
AYC is inoperative.
Unable to start or accelerate on slippery road surfaces.
Rear tires are noisy during low-speed cornering.
Vehicle skews.
Noise is produced from the torque transfer differential during turning.
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
INSPECTION PROCEDURE 5
AYC is inoperative.
Unable to start or accelerate on slippery road surfaces.
The hydraulic oil level is probably low, there is an oil leak, the hydraulic unit is defective,
or the torque transfer differential is defective.
NOTE
This symptom is limited only when the diagnosis code is correct.
Check the gear oil level. (Refer to
P.27B-16.)
OK
Check the fluid level.
(Refer to P.27B-19.)
OK
Check the AYC for operation.
(Refer to P.27B-20.)
NG
Check hydraulic pressure.
(Refer to P.27-21.)
OK
Is foreign matter trapped in the hydrau-
lic line?
NO
Replacethetorquetransferdifferential.
REAR AXLE - REAR AXLE -
Troubleshooting <AYC> Troubleshooting <AYC>
NG
Check for oil leak.
Add gear oil. (Refer to P.27B-16.)
NG
Check the hydraulic pressure line for
leak.
Add fluid. (Refer to P.27B-19.)
OK
Check the trouble symptom.
NG
Bleed the system of air.
(Refer to P.27-19.)
YES
Repair
Check the trouble symptom.
Replace the hydraulic unit. (Refer to
P.27B-61.)
Probable cause
D Low hydraulic oil level
D Oil leak
D Defective hydraulic unit
D Defective torque transfer differential
NG
OK
NG
OK
OK
NG
NG
Inspection Reference
procedure No. page
1 Refer to
GROUP 22 GROUP 22.
2
3
4
5 27B-14
6 27B-15
7 27B-15
Repair
Repair
Normal