Mitsubishi Lancer Evolution 8 MR. Manual — part 20
MANUAL TRANSMISSION - TROUBLESHOOTING
22-18
Code No.74 Proportional valve <ACD> system
Assumed cause of concern
In cases where the proportional valve <ACD> control circuit
is shorting, code No.74 is output.
• Proportional valve <ACD> malfunction
• Harness, connector malfunction
• 4WD-ECU malfunction
Remarks
*2
: refer to ’01-1 Lancer Evolution VII Service Manual (No.1036K02)
MUT-II/III Service data
• No.11 Proportional valve current <ACD>
OK: P.22-32 Refer to (Service Data List)
*2
OK -> Intermittent malfunction
Measurement at F-25 proportional valve <ACD>
connector
• Undo connector, take measurement on proportional
valve side
• Resistance between 2 -3
OK: 4.7
Ω
or less
Measurement at F-25 proportional valve <ACD>
connector
• Undo connector, take measurement on harness side
• Resistance between 2 – body earth
OK: 2
Ω
or less
Connector check: F-25, F-22
NG -> repair
Check harness between proportional valve <ACD> -
body earth
• Check earth wire to see if broken or damaged
NG -> repair
Replace hydraulic unit
Connector check: F-25, F-22, C-30, C-133, C-38
NG -> repair
Check harness between 4WD-ECU and Proportional
valve <ACD>
• Check output wire to see if broken, shorting, or
damaged
NG -> repair
MUT-II/III Service data
• No.11 Proportional valve current <ACD>
OK: refer to P.22-32 (Service Data List)
*2
NG: replace 4WD ECU
OK -> Intermittent malfunction
Code No.81 Electric pump relay system
Assumed cause of concern
Output when the circuit on the pump relay coil side is broken
or shorting.
• Electric pump relay malfunction
• Harness, connector malfunction
• 4WD-ECU malfunction
Remarks
*2
: refer to ’01-1 Lancer Evolution VII Service Manual (No.1036K02)
MUT-II/III actuator test
• No.04 Electric pump operation
OK: the electric pump operating sound is audible
OK -> Intermittent malfunction
Check electric pump relay (refer P.22-53)
*2
Measurement at B-127 electric pump relay connector
• Undo connector, take measurement on harness side
• Resistance between 1 – body earth
OK: 2
Ω
or less
Connector check: B-127
NG -> repair
Check harness between electric pump relay - body earth
• Check earth wire to see if broken or damaged
NG -> repair
Replace electric pump relay
Connector check: B-127, C-38
NG -> repair
Check harness between 4WD-ECU and electric pump relay
• Check power supply wire to see if broken, shorting,
or damaged
NG -> repair
MUT-II/III Actuator test
• No.04 Electric pump operation
OK: the electric pump operating sound is audible
NG: replace 4WD ECU
OK ->
NG
OK
OK
OK
OK
OK
NG
OK
OK
NG
NG
OK
OK
OK
NG
OK
MANUAL TRANSMISSION - TROUBLESHOOTING
22-19
3. Fault classification
4. Fault classification procedure
Checking procedure 2
Fault
Check procedure No.
Page ref.
No communication between MUT-II/III and 4WD-ECU
2
22-19
When ignition switch is ON, (engine stopped), ACD mode indicator lamp does not come on.
3
22-20
Even after engine starts, at least 2 ACD mode indicator lamps remain lit
4
22-20
No communication between MUT-II/III and 4WD-ECU
Assumed cause of concern
Diagnosis output circuit, 4WD-ECU power supply circuit,
earth circuit or 4WD-ECU malfunctions are possible.
• Harness, connector malfunction
• 4WD-ECU malfunction
Measurement at C-122, diagnosis code connector and
C-37 4WD-ECU connector.
• Resistance between C-122 1 and C-37 46
• Resistance between C-122 7 and C-37 35
OK: 2
Ω
or less
Measurement at C-38 4WD-ECU connector
• Measure ECU terminal voltage
• Ignition switch ON
• Voltage between 13 – body earth
OK: battery voltage
Measurement at C-37, C-38, 4WD-ECU connector
• Undo connector, take measurement on harness side
• Resistance between C-38 26 and body earth
• Resistance between C-37 42 and body earth
• OK: 2
Ω
or less
Connector check: C-37, C-38
NG -> repair
Fault confirmation
Replace 4WD-ECU
Connector check: C-37, C-23, C-22, C-20, C-122,
C-110, C-06
NG -> repair
Fault confirmation
Harness check between 4WD-ECU and diagnosis
connector
• Check output wire to see if broken or damaged
• NG -> repair
Connector check: C-38, C212, C-210, C133
NG -> repair
Fault confirmation
Check harness between ignition switch and 4WD-ECU
• Check power supply wire to see if broken or
damaged
NG -> repair
Connector check: C-37, C-38
NG -> repair
Fault confirmation
Check harness between 4WD-ECU – earth
• Check earth wire to see if broken or damaged
NG -> repair
OK
OK
OK
OK
NG
OK
NG
NG
OK
OK
NG
NG
NG
NG
MANUAL TRANSMISSION - TROUBLESHOOTING
22-20
The ACD mode injector lamp does not come on when the ignition
switch is ON (engine stopped)
Assumed cause of concern
ACD mode indicator lamp circuit or 4WD-ECU malfunctions are possible.
• Harness, connector malfunction
• ACD mode indicator lamp ASSY malfunction
• 4WD-ECU malfunction
Measurement at C-106, combi. meter connector.
• Undo connector, take measurement on harness side
• Ignition switch ON
• Voltage between 9 – body earth
OK: battery voltage
Measurement at C-37 4WD-ECU connector
• Undo connector, take measurement on harness side
• Ignition switch ON
• Earth 40, 51, 52 to body earth
OK: indicator lamp on
Connector check: C-37
NG -> repair
Fault confirmation
Replace 4WD-ECU
Connector check: C-106, C-212, C-210
NG -> repair
Fault confirmation
Check harness between ignition switch – ACD mode
indicator lamp ASSY
• Check power supply wire to see if broken or
damaged
• NG -> repair
Check ACD mode indicator lamp ASSY
NG -> replace
Connector check: C-37, C-133, C-106
NG -> repair
Fault confirmation
Check harness between ACD mode indicator lamp
ASSY - 4WD-ECU
• Check output wire to see if broken or damaged
When C-37 4WD-ECU connector is undone, do all
ACD mode indicator lamps all go out?
Replace 4WD-ECU
Check connector: C-37, C-133, C-106
NG -> repair
Fault confirmation
Check harness between ACD mode indicator ASSY -
4WD-ECU
• Check output wire for earthing, shorting
NG -> repair
Replace ACD mode indicator ASSY
Checking procedure 3
Checking procedure 4
Even after engine starts, at least 2 ACD mode indicator lamps
remain lit
Assumed cause of concern
ACD mode indicator lamp output circuit malfunction is possible.
• Harness, connector malfunction
• 4WD-ECU malfunction
• ACD mode indicator lamp ASSY malfunction
Remarks
This phenomenon is limited to when communication with MUT-II/III is possible (4WD-ECU power supply normal), and diagnosis
code is normal/correct.
OK
NG
NG
NO
OK
OK
NG
NG
OK
OK
OK
NG
YES
OK
NG
OK
33A-1
FRONT SUSPENSION – GENERAL, SPECIAL TOOLS
SECTION 33A
CONTENTS
General. . . . . . . . . . . . . . 1
Special tools. . . . . . . . . . . ...1
Strut Assembly. . . . . . . . . . ...2
General
Important servicing information has been added along with the adoption of Bilstein shock absorbers. However, apart from the
information below, other servicing information remains unchanged.
Special Tools
Tool
Number
Name
Details
MB991367
Special spanner
Dismantling and assembly of strut ASSY.
Vehicles fitted with Bilstein shock absorbers
MB991385
Pin
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