ECU MITSUBISHI LANCER EVOLUTION VIII 2004 Owner's Manual

MANUAL TRANSMISSION TROUBLESHOOTING2211
Code No.52 Longitudinal G sensor systemAssumed cause of concern
At 10kph or over, with ABS and brakes not applied, code No.
52 is output in cases where G sensor indicates higher than
specified value.• Harness, connector malfunction
• Longitudinal G sensor malfunction
• ABSECU malfunction
• 4WDECU malfunction
Remarks*2: refer to ’011 Lancer Evolution VII Service Manual (No.1036K02)
MUTII/III Service data
• No.14 longitudinal sensor voltage
OK:P.2232 Refer to (Service Data List)*2
OK > Intermittent malfunction
Longitudinal G sensor check (refer to P.2232)
*2
NG > replace
Measurement at C38 4WDECU connector
• ECU terminal voltage measurement
• Ignition switch: ON
• Voltage between 23 – earth
OK:2.4 – 2.6V (when vehicle is standing on flat
ground)
Connector check:C38
NG > repair
MUTII/III Service data
• No.14 longitudinal sensor voltage
OK:P.2232 Refer to (Service Data List)*2
NG > Replace 4WDECU
OK > Intermittent malfunction
Connector check:C38, D29, C20, B109
C38, C20, D29 fitted vehicles> NG > repair
Check harness between longitudinal G sensor – 4WD
ECU
•Check to see if output wire is broken, earth, or
damaged
Check harness between longitudinal G sensor – ABS
ECU

MUTII/III Service data
• No.14 longitudinal G sensor voltage
OK:Refer to P.2232 (Service Data List)*2
NG > Refer to Group 35C – Troubleshooting*2
or replace 4WDECU
OK > intermittent malfunction
NG
OK
OK
OK
NG
OK
OK

MANUAL TRANSMISSION TROUBLESHOOTING2212
Code No.56 Longitudinal G sensor systemAssumed cause of concern
Code No.56 is output when the longitudinal G sensor signal
falls below 0.5V or rises above 4.5V.• Harness, connector malfunction
• Longitudinal G sensor malfunction
• ABSECU malfunction
• 4WDECU malfunction
Remarks*2: refer to ’011 Lancer Evolution VII Service Manual (No.1036K02)
MUTII/III Service data
• No.15 longitudinal G sensor power voltage
OK:P.2232 Refer to (Service Data List)*2
OK > Intermittent malfunction
Measurement at D31 lateral G sensor connector
• Undo connector and measure on harness side
•Ignition switch: ON
(1)Voltage between 1 earth
OK:battery voltage
(2)Resistance between 3 – earth
OK:2Ω or less
D29
Harness side
connector
• Remove longitudinal G sensor
• Connect the special tool between D31 longitudinal
G sensor connector harness side connector and
longitudinal G sensor.
• Ignition switch: ON
• Voltage between 2 – body earth (when longitudinal
G sensor is set on a flat surface)
OK:2.4 – 2.6V
• Voltage between 2 – body earth (when longitudinal
G sensor is placed so that the label surf
ace faces
sideways)
OK:3.3 – 3.7V
Connector check:D31, C38, C20, B109 AYC fitted vehicles> D31, C20, C38 vehicles>
NG > repair
Check harness between lateral G sensor – 4WDECU
• Check for broken output wire, earth, damage
Check harness between lateral G sensor – ABSECU
•Check output wire for earth, damage
NG > repair
Connector check:D31, C212, C210
NG > repair
Check harness between lateral G sensor – ignition
switch.
• Check for broken power supply wire, earth, damage
NG > repair
Connector check:D31, C20, B109 fitted vehicles> D31, C20, C38, vehicles>
NG > repair
Check harness between lateral G sensor – ABSECU

MUTII/III Service data
•No.15 lateral G sensor voltage
OK:Refer to P.2232 (Service Data List)*2
NG > Refer to Group 35C – Troubleshooting*2
or 4WDECU vehicles> Replace
OK > intermittent malfunction
Replace lateral G sensor
MUTII/III Service data
• No.15 longitudinal G sensor voltage
OK:Refer to P.2232 (Service Data List)*2
NG > Refer to Group 35C – Troubleshooting*2
or 4WDECU vehicles> Replace
OK > intermittent malfunction
label label
(1) NG
NG
OK
(2) NG
NG
OK
OK
OK
OK
OK
OK

MANUAL TRANSMISSION TROUBLESHOOTING2213
Code No.57 Lateral G sensor systemAssumed cause of concern
At 10kph or over, with ABS and brakes not applied, code No.
57 is output in cases where G sensor indicates higher than
specified value.• Harness, connector malfunction
• Longitudinal G sensor malfunction
• ABSECU malfunction
• 4WDECU malfunction
Remarks*2: refer to ’011 Lancer Evolution VII Service Manual (No.1036K02)
MUTII/III Service data
• No.15 longitudinal sensor voltage
OK:P.2232 Refer to (Service Data List)*2
OK > Intermittent malfunction
Lateral G sensor check (refer to P.2220)
*2
NG > replace
Measurement at C38 4WDECU connector
•ECU terminal voltage measurement
• Ignition switch: ON
•Voltage between 11 – earth
OK:2.4 – 2.6V (when vehicle is standing on flat
ground)
Connector check:C38
NG > repair
MUTII/III Service data
•No.15 lateral sensor voltage
OK:P.2232 Refer to (Service Data List)*2
NG > Replace 4WDECU
OK > Intermittent malfunction
Connector check:C38, D31, C20, B109
C38, C20, D31 fitted vehicles> NG > repair
Check harness between lateral G sensor – 4WDECU
•Check to see if output wire is broken, earth, or
damaged
Check harness between lateral G sensor – ABSECU
• Check to see if output wire earth or damaged
NG > repair
MUTII/III Service data
•No.15 lateral G sensor voltage
OK:Refer to P.2232 (Service Data List)*2
NG > Refer to Group 35C – Troubleshooting*2
or replace 4WDECU
OK > intermittent malfunction
NG
NG
OK
OK
OK
OK
OK

MANUAL TRANSMISSION TROUBLESHOOTING2214
Code No.61 Stop lamp switch systemAssumed cause of concern
In cases where, at 15kph or over, the stop lamp switch stays
ON for 15 minutes or longer, code No.61 is output.• Brake pedal malfunction
•Stop lamp switch malfunction
• Harness, connector malfunction
•4WDECU malfunction
Remarks*1: Refer to ’005 Lancer Sedia Service Manual (No.1036K00)
Check height of brake pedal
(Refer to Group 35A – Vehicle Servicing)
*1
NG > Adjust
MUTII/III Service data
• No.56 Stop lamp switch
(1)Depress brake pedal
OK:ON
(2)Release brake pedal
OK:OFF
OK > Intermittent malfunction
Check connector:C118
NG > repair
Check stop lamp switch
(Refer to Group 35A – Brake pedal)
*1
NG > replace
Measurement at C118 stop lamp switch connector
• Undo connector, measure on harness side
•Voltage between 2 – earth
OK:battery voltage
Measurement at C37 4WDECU connector
• ECU terminal voltage measurement
•
Voltage between 38 earth
(1)Depress brake pedal
OK:battery voltage
(2)Release brake pedal
OK:1V or less
Connector check:C118, C22, C23, C37
NG > repair
Check harness between 4WDECU stop lamp
switch
• Check for broken or damaged output wire
NG > repair
Check harness between stop lamp switch – stop lamp.
• Check for broken or damaged output wireNG > repair
Connector check:C118, C31
NG > repair
Check harness between stop lamp switch – battery
•Check power supply wire to see if broken or
damaged
NG > repair
Connector check:C37
NG > repair
MUTII/III Service data
•No.56 Stop lamp switch
(1)Depress brake pedal
OK:ON
(2)Release brake pedal
OK:OFF
NG > replace 4WDECU
OK > Intermittent malfunction
NG
OK
OK
NG
OK
OK
OK
NG
OK
OK
OK
OK

MANUAL TRANSMISSION TROUBLESHOOTING2215
Code No.62 ACD mode switch systemAssumed cause of concern
In cases where the ACD mode switch remains ON for 60
seconds or more, code No.61 is output.• ACD mode switch malfunction
• Harness, connector malfunction
Remarks*2: refer to ’011 Lancer Evolution VII Service Manual (No.1036K02)
MUTII/III Service data
• No.63 ACD mode switch
(1)Press ACD mode switch
OK:ON
(2)Release ACD mode switch
OK:OFF
OK > intermittent malfunction
Check ACD mode switch (refer to P.2253)
*2
NG > replace
Measurement at C134 ACD mode switch connector
• Undo connector, take measurement on harness side
•Ignition switch: ON
• Voltage between 2 – earth
OK:battery voltage
Measurement at C37 4WDECU connector
•Measure ECU terminal voltage
• Ignition switch: OFF
•Voltage between 47 – earth
(1)Press ACD mode switch
OK:battery voltage
(2)Release ACD mode switch
OK:1V or less
Connector check:C37
NG > repair
MUTII/III Service data
• No.63 ACD mode switch
(1)Press ACD mode switch
OK:ON
(2)Release ACD mode switch
OK:OFF
NG > replace 4WDECU
OK > intermittent malfunction
Connector check:C134, C209, C210
NG > repair
Check harness between ACD mode switch – ignition
switch
•Check for broken power supply wire, damage
NG > repair
Check harness between junction block – combi. Meter
•Check power supply wire for earth, damage
NG > repair
Connector check:C134, C133, C37
NG > repair
Check harness between 4WDECU – ACD mode
switch
• Check to see if output wire is broken or damagedNG > repair
NG
NG
NG
OK
OK
OK
OK
OK
OK
OK

MANUAL TRANSMISSION TROUBLESHOOTING2216
Code No.63 Parking brake switchAssumed cause of concern
In cases where, at 15kph or over, the parking brake switch
remains ON for 15 minutes or more, code No.63 is output.• Parking brake switch malfunction
•Harness, connector malfunction
• ABSECU malfunction,
•4WDECU malfunction
Remarks*1: Refer to ’005 Lancer Sedia Service Manual (No.1036K00)
MUTII/III Service data
• No.62 Parking brake switch
(1)Apply parking brake lever
OK:ON
(2)Release parking brake lever
OK:OFF
OK > intermittent malfunction
When parking brake lever is
released, does the brake
warning lamp go off?
Measurement at D25, parking
brake switch connector
•Undo connector, take
measurement on harness side
•Ignition switch: ON
• Voltage between 1 – earth
OK:battery voltage
Connector check:D25
NG > repair
Check, and if necessary adjust,
the play in the parking brake
lever
(refer to Group 36 – Vehicle
Servicing)
*1
NG > Adjust
Check parking brake switch
(refer to Group 36 – Vehicle
Servicing)
*1
NG > adjust
Connector check:C37, D25,
C20NG > repair
Connector check:D25, C37,
C20, B109 vehicles>
D25, C20, C37 vehicles>
NG > repair
(1)Check harness between
parking brake switch – 4WD
ECU
• Check output wire for
earth, damage
(2)Check harness between
parking brake switch –
combi.meter
• Check power supply wire
for earth, damage
(3) Check harness between
parking brake switch – ABS
ECU.

• Check output wire forearth, damage
NG > repair
Replace hydraulic unit, ABS
ECUCheck harness between
parking break switch – 4WD
ECU
• Check output wire to see if
broken or damaged
NG > repair
MUTII/III Service data
• No.62 Parking brake switch
(1)Apply parking brake lever
OK:ON
(2)Release parking brake lever
OK:OFF
NG > replace 4WDECU
OK > intermittent malfunction
Check brake warning lamp bulb
NG > replace
Replace combi. meter
YESOK
(1) OK
(2) OK
NG
NG
NO
OK
OK
OK
(3) OK
OK
OK
OK

MANUAL TRANSMISSION TROUBLESHOOTING2217
Code No.65 ABS monitor systemAssumed cause of concern
In cases where the ABS is detected to have been operating
continuously for at least 1 minute, code No.65 is output.• Harness, connector malfunction
• ABSECU malfunction
• 4WDECU malfunction

MUTII/III Service data
• No.61 ABS monitor
(1)ABSECU connector: undo
OK:ON
(2)ABSECU connector: connect
OK:OFF
OK > intermittent malfunction
Measurement at C37 4WDECU
• Undo connector, take measurement on harness side
• Voltage between 48 – body earth
OK:battery voltage
Connector check:C37
NG> repair
MUTII/III Service data
• No.61 ABS monitor
(1)Press ACD mode switch
OK:OFF
NG > replace 4WDECU
OK > intermittent malfunction
Connector check:C37, B109
NG > repair
Check harness between 4WDECU and ABSECU
• Check output wire for shorting, damage
NG > repair
Connector check:C37, B109
NG > repair
Check harness between 4WDECU and ABSECU
• Check output wire to see if broken, shorting, or
damaged
NG > repair
B109 Measurement at ABSECU connector
• ECU terminal voltage measurement
• Voltage between 3 – body earth
• Carry out ABS actuator test (no.05: ABS signal)
OK:For 10 seconds during test, 1V or less, after
which battery voltage
NG > replace hydraulic unit, ABSECU
(1) NG
NG
(2) NG
OK
OK
OK
OKOK

MANUAL TRANSMISSION TROUBLESHOOTING2218
Code No.74 Proportional valve systemAssumed cause of concern
In cases where the proportional valve control circuit
is shorting, code No.74 is output.• Proportional valve malfunction
• Harness, connector malfunction
Remarks*2: refer to ’011 Lancer Evolution VII Service Manual (No.1036K02)
MUTII/III Service data
• No.11 Proportional valve current
OK:P.2232 Refer to (Service Data List)*2
OK > Intermittent malfunction
Measurement at F25 proportional valve
connector
• Undo connector, take measurement on proportional
valve side
• Resistance between 2 3
OK:4.7Ωor less
Measurement at F25 proportional valve
connector
• Undo connector, take measurement on harness side
• Resistance between 2 – body earth
OK:2Ω or less
Connector check:F25, F22
NG > repair
Check harness between proportional valve
body earth
•Check earth wire to see if broken or damaged
NG > repair Replace hydraulic unit
Connector check:F25, F22, C30, C133, C38
NG > repair
Check harness between 4WDECU and Proportional
valve
•Check output wire to see if broken, shorting, or
damaged
NG > repair
MUTII/III Service data
• No.11 Proportional valve current
OK:refer to P.2232 (Service Data List)*2
NG: replace 4WD ECU
OK > Intermittent malfunction
Code No.81 Electric pump relay systemAssumed cause of concern
Output when the circuit on the pump relay coil side is broken
or shorting.• Electric pump relay malfunction
• Harness, connector malfunction
• 4WDECU malfunction
Remarks*2: refer to ’011 Lancer Evolution VII Service Manual (No.1036K02)
MUTII/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.2253)
*2
Measurement at B127 electric pump relay connector
• Undo connector, take measurement on harness side
• Resistance between 1 – body earth
OK:2Ωor less
Connector check:B127
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:B127, C38
NG > repair
Check harness between 4WDECU and electric pump relay
•Check power supply wire to see if broken, shorting,
or damaged
NG > repair
MUTII/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 TROUBLESHOOTING2219
3.Fault classification
4. Fault classification procedure
Checking procedure 2
FaultCheck procedure No.Page ref.
No communication between MUTII/III and 4WDECU22219
When ignition switch is ON, (engine stopped), ACD mode indicator lamp does not come on.32220
Even after engine starts, at least 2 ACD mode indicator lamps remain lit 42220
No communication between MUTII/III and 4WDECUAssumed cause of concern
Diagnosis output circuit, 4WDECU power supply circuit,
earth circuit or 4WDECU malfunctions are possible.• Harness, connector malfunction
•4WDECU malfunction
Measurement at C122, diagnosis code connector and
C37 4WDECU connector.
• Resistance between C122 1 and C37 46
• Resistance between C122 7 and C37 35
OK:2Ω or less
Measurement at C38 4WDECU connector
•Measure ECU terminal voltage
• Ignition switch ON
OK:battery voltage
Measurement at C37, C38, 4WDECU connector
• Undo connector, take measurement on harness side
• Resistance between C38 26 and body earth
Connector check:C37, C38
NG > repair
Fault confirmation Replace 4WDECU
Connector check:C37, C23, C22, C20, C122,
C110, C06
NG > repair
Fault confirmationHarness check between 4WDECU and diagnosis
connector
Connector check:C38, C212, C210, C133
NG > repair
Fault confirmation
Check harness between ignition switch and 4WDECU
•Check power supply wire to see if broken or
damaged
NG > repair
Connector check:C37, C38
NG > repair
Fault confirmation
Check harness between 4WDECU – 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 TROUBLESHOOTING2220
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 4WDECU malfunctions are possible.• Harness, connector malfunction
• ACD mode indicator lamp ASSY malfunction
• 4WDECU malfunction
Measurement at C106, combi. meter connector.
• Undo connector, take measurement on harness side
• Ignition switch ON
OK:battery voltage
Measurement at C37 4WDECU connector
• Undo connector, take measurement on harness side
• Ignition switch ON
• Earth 40, 51, 52 to body earth
OK:indicator lamp on
Connector check:C37
NG > repair
Fault confirmation Replace 4WDECU
Connector check:C106, C212, C210
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:C37, C133, C106
NG > repair
Fault confirmation
Check harness between ACD mode indicator lamp
ASSY 4WDECU
• Check output wire to see if broken or damaged
When C37 4WDECU connector is undone, do all
ACD mode indicator lamps all go out?
Replace 4WDECU
Check connector:C37, C133, C106
NG > repair
Fault confirmation Check harness between ACD mode indicator ASSY
4WDECU
• 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 litAssumed cause of concern
ACD mode indicator lamp output circuit malfunction is possible.•Harness, connector malfunction
• 4WDECU malfunction
• ACD mode indicator lamp ASSY malfunction
Remarks
This phenomenon is limited to when communication with MUTII/III is possible (4WDECU power supply normal), and diagnosis
code is normal/correct.
OK
NG
NG
NO
OK
OK
NG
NG
OK
OK
OK
NG
YESOK
NG
OK