Mitsubishi Electric Lancer Evolution-VII Workshop Manual page 939

22A-32
MANUAL TRANSMISSION - Troubleshooting <ACD>
Inspection procedure 2
No communication is possible between the MUT-II and
4WD-ECU.
The diagnostic output circuit, 4WD-ECU power supply circuit, earth circuit, or
4WD-ECU may be faulty.
Measure at diagnosis connector C-22 and 4WD-ECU
connector C-43.
D Resistance between terminal 1 of C-22, and terminal 46 of
C-43
D Resistance between terminal 7 of C-22 and terminal 35 of
C-43
OK: 2 Ω or less
Measure at 4WD-ECU connector C-44.
D Measure the ECU terminal voltage.
D Ignition switch: ON
D Voltage between terminal 13 and body earth
OK: System voltage
Measure at 4WD-ECU connectors C-43 and C-44.
D Disconnect the connector and measure at the harness
side.
D Resistance between terminal 26 of C-44 and body earth
D Resistance between terminal 42 of C-43 and body earth
OK: 2 Ω or less
Check the following connectors: C-43, C-44
NG→Repair
Check the trouble symptoms.
Replace the 4WD-ECU.
OK
OK
OK
OK
NG
Probable cause
D Harness or connector fault
D 4WD-ECU fault
NG
Check the following connectors:
<L.H. drive vehicles> C-22, C-43, C-108, C-130, C-26, C-102
<R.H. drive vehicles> C-22, C-43, C-28, C-26
NG→Repair
Check the trouble symptoms.
Check the harness between the 4WD-ECU and diagnosis
connector.
D Check for open circuit and damage of the power line.
NG→Repair
NG
Check the following connectors:
<L.H. drive vehicles> C-44, C-130, C-213, C-210
<R.H. drive vehicles> C-44, C-213, C-210
NG→Repair
Check the trouble symptoms.
Check the harness between the ignition switch and 4WD-ECU.
D Check for open circuit or damage of the power line.
NG→Repair
NG
Check the following connectors:
<L.H. drive vehicles> C-43, C-44
<R.H. drive vehicles> C-43, C-44, C-08
NG→Repair
Check the trouble symptoms.
Check the harness between the 4WD-ECU and earth.
D Check for open circuit and damage of the earth line.
NG→Repair
OK
NG
OK
NG
OK
NG