Mitsubishi Lancer Evolution 7. Manual — part 246
MANUAL TRANSMISSION - Troubleshooting <ACD>
22A-7
Diagnosis
code No.
Reference page
Diagnosis items
81
Electric pump relay system
open circuit or short-circuit
22A-29
82
electric pump malfunction
or pressure sensor defect
22A-30
84
AYC control error
Refer to
GROUP 27B.
85
ACD control error
-
NOTE
Code No.85 is not a code number output due to malfunction, but a code number output when control
for the 4WD-ECU to protect the ACD is stopped in excessive driving. ACD control can be recovered
by turning the ignition switch ON to OFF to ON.
MANUAL TRANSMISSION - Troubleshooting <ACD>
22A-8
INSPECTION PROCEDURES FOR DIAGNOSIS CODES
Code No.12 Power supply voltage (valve power supply)
system
Probable cause
The power supply circuit opens or short-circuits if the power supply voltage of the
4WD-ECU is below 9 V or above 18 V.
Or code No.12 is output when the battery voltage drops.
D
Defective harness or connector
D
Defective battery
D
Defective 4WD-ECU
NOTE
Refer to the corresponding item if any other diagnosis code is being output.
OK
OK
NG
NG
OK
Check the battery.
NG→Replace
Measure at 4WD-ECU connector C-44.
D
Measure the ECU terminal voltage.
D
Ignition switch: ON
D
Voltage between terminal 13 and earth
OK: System voltage
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
MUT-II Data List
D
No.10 battery voltage
OK: System voltage
OK→Intermittent malfunction (Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions)
OK
Check the following connector: C-44
NG→Repair
MUT-II Data List
D
No.10 battery voltage
OK: System voltage
NG→Replace the 4WD-ECU
OK→Intermittent malfunction (Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions)
Check the harness between the ignition switch and 4WD-ECU
D
Check for the open circuit, short circuit, or damage of the
power supply
NG→Repair
Code No.13 Fail-safe relay system <inside 4WD-ECU>
Probable cause
Code No.13 will be output as the open circuit or short circuit of the fail-safe relay
when the voltage is above 6 V during failsafe relay OFF or when the voltage is
below 6 V during ON.
D
Defective 4WD-ECU
Replace the 4WD-ECU.
MANUAL TRANSMISSION - Troubleshooting <ACD>
22A-9
Code No.21 Wheel speed sensor <FR> system
Code No.22 Wheel speed sensor <FL> system
Code No.23 Wheel speed sensor <RR> system
Code No.24 Wheel speed sensor <RL> system
Probable cause
A diagnosis code corresponding to the open circuit or short circuit of the wheel
speed sensor is output when one wheel speed sensor has detected a vehicle
speed of above 15 km/h, but any one of the remaining three wheel speed
sensors could not detect the vehicle speed.
D
Wheel speed sensor fault
D
Rotor fault
D
Wheel bearing fault
D
Harness or connector fault
D
ABS-ECU fault <Vehicles with ACD and AYC>
D
4WD-ECU fault
<Vehicles with ACD and AYC>
OK
NG
YES
NO
OK
Measure at 4WD-ECU connector C-44.
D
Measure the ECU terminal voltage.
D
Ignition switch: ON
D
Rotate the tire corresponding to the measured terminal by
one and a half to one rotate per second.
(1) Voltage between terminal 9 and body earth <FR>
(2) Voltage between terminal 6 and body earth <FL>
(3) Voltage between terminal 7 and body earth <RR>
(4) Voltage between terminal 8 and body earth <RL>
OK: Changes at 0 V ↔ 5 V
Check the following connector: C-44
NG→Repair
Check the following connectors:
<L.H. drive vehicles> C-44, B-123
<R.H. drive vehicles> C-44, C-147, B-123
NG→Repair
MUT-II Diagnosis Code
D
Are the ABS Diagnosis Code Numbers.11, 12, 13, 14, 21,
22, 23, and 24 output?
Refer to GROUP 35B - Troubleshooting.
NG
MUT-II Data List
D
No.01 Vehicle speed sensor <FR>
D
No.02 Vehicle speed sensor <FL>
D
No.03 Vehicle speed sensor <RR>
D
No.04 Vehicle speed sensor <RL>
OK: The speed meter display and MUT-II display match.
OK→Intermittent malfunction (Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
OK
Check the harness between 4WD-ECU and ABS-ECU.
D
Check for open circuit, ground, and short-circuit of the
output line.
NG→Repair
MUT-II Data List
D
No.01 Vehicle speed sensor <FR>
D
No.02 Vehicle speed sensor <FL>
D
No.03 Vehicle speed sensor <RR>
D
No.04 Vehicle speed sensor <RL>
OK: The speed meter display and MUT-II display match.
NG→Replace the 4WD-ECU
OK→Intermittent malfunction (Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
MANUAL TRANSMISSION - Troubleshooting <ACD>
22A-10
<Vehicles with ACD>
OK
OK
NG
OK
NG
OK
OK
OK
NG
Measure at 4WD-ECU connector C-44.
D
Disconnect the connector and measure at the harness
side.
(1) Resistance between terminals 9 and 22 (vehicle speed
sensor <FR>)
(2) Resistance between terminals 6 and 19 (vehicle speed
sensor <FL>)
(3) Resistance between terminals 7 and 20 (vehicle speed
sensor <RR>)
(4) Resistance between terminals 8 and 21 (vehicle speed
sensor <RL>)
OK: 1.2 - 1.6 kΩ
Check the wheel speed sensor.
(Refer to GROUP 35B - Wheel Speed Sensor.)
NG→Replace
Check the installation of the wheel speed sensor.
NG→Repair
Check the wheel speed sensor and rotor
(Refer to GROUP 35B - Wheel Speed Sensor.)
NG→Repair
Check the wheel beearing. (Refer to GROUP 26 - On-vehicle
Service, and GROUP 27B - Rear Hub Assembly.)
NG→Repair
OK
MUT-II Data List
D
No.01 Vehicle speed sensor <FR>
D
No.02 Vehicle speed sensor <FL>
D
No.03 Vehicle speed sensor <RR>
D
No.04 Vehicle speed sensor <RL>
OK: The speed meter display and MUT-II display match.
OK→Intermittent malfunction (Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
Check the following connectors:
<L.H. drive vehicles> C-44, A-03, A-37, D-10, D-04, D-30,
C-146, C-111, C-128, A-43
<R.H. drive vehicles> C-44, A-03, A-37, D-10, D-04, D-30,
C-146, C-111, C-136, C-147
NG→Repair
Check the harness between the 4WD-ECU and each wheel
speed sensor.
D
Check for open circuit, grounding, and short circuit of the
output line.
D
Check for open circuit and damage of the earth line
NG→Repair
MUT-II Data List
D
No.01 Vehicle speed sensor <FR>
D
No.02 Vehicle speed sensor <FL>
D
No.03 Vehicle speed sensor <RR>
D
No.04 Vehicle speed sensor <RL>
OK: The speed meter display and MUT-II display match.
NG→Replace the 4WD-ECU.
OK→Intermittent malfunction (Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions)
OK
Check the following connector: C-44
NG→Repair
MUT-II Data List
D
No.01 Vehicle speed sensor <FR>
D
No.02 Vehicle speed sensor <FL>
D
No.03 Vehicle speed sensor <RR>
D
No.04 Vehicle speed sensor <RL>
OK: The speed meter display and MUT-II display match.
NG→Replace the 4WD-ECU
OK→Intermittent malfunction (Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
Check the wheel speed sensor output voltage. (Refer to
P.22A-44.)
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