Mitsubishi Lancer Evolution 7. Manual — part 247
MANUAL TRANSMISSION - Troubleshooting <ACD>
22A-11
Code No.25 Wrong-diameter tire
Probable cause
Code No.25 is output as wrong-diameter tire when one of the four vehicle
speeds is outside the range of specified values in respect to the average of the
four vehicle speed sensors, when the vehicle speed is above 20 km/h with the
steering wheel in the straight ahead position.
However the warning lamp does not light up.
D
Tire fault
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
OK
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
OK
YES
OK
OK
Check the wheel speed sensor and rotor.
(Refer to GROUP 35B - Wheel Speed Sensor.)
NG→Repair
Check the wheel speed sensor output voltage. (Refer to
GROUP 35B - On-vehicle Service.)
OK
Check the wheel speed sensor installation.
NG→Repair
NG
OK
Check the wheel beearing. (Refer to GROUP 26 - On-vehicle
Service, and GROUP 27B - Rear Hub Assembly.)
NG→Repair
OK
Check the following connectors:
<L.H. drive vehicles> B-123, A-03, A-37, D-10, D-04, D-30,
C-146, C-111, C-128, A-43
<R.H. drive vehicles> B-123, A-03, A-37, D-10, D-04, D-30,
C-146, C-111, C-128, C-136
NG→Repair
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.)
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 by 0 V ↔ 5 V.
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)
Refer to GROUP 35B - Troubleshooting. (Refer to Diagnosis
Code No.11, 12, 13, 14, 21, 22, 23, and 24.)
Are all four wheels mounted to normal tires?
NO→Repair
Check the harness between the ABS-ECU and each wheel
speed sensor.
D
Check for open circuit and ground of the output line.
D
Check for open circuit and damage of the earth line.
NG→Repair
OK
Check the harness between the 4WD-ECU and
ABS-ECU.
D
Check for open circuit, ground and damage of
the power line.
NG→Repair
OK
MANUAL TRANSMISSION - Troubleshooting <ACD>
22A-12
<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 and ground 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.)
MANUAL TRANSMISSION - Troubleshooting <ACD>
22A-13
Code No.26 Wheel speed sensor system (faulty output
signal)
Probable cause
Code No.26 is output as output signal error of the wheel speed sensor when
one wheel speed is outside the specified range at the vehicle speed of above
20 km/h.
However, warning lamp will light up.
D
Tire fault
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
OK
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
OK
Check the harness between the 4WD-ECU and ABS-ECU.
D
Check for open circuit, ground and damage of the power
line.
NG→Repair
YES
OK
OK
Check the wheel speed sensor and rotor.
(Refer to GROUP 35B - Wheel Speed Sensor.)
NG→Repair
Check the wheel speed sensor output voltage. (Refer to
GROUP 35B - On-vehicle Service.)
OK
Check the installation of the wheel speed sensor.
NG→Repair
NG
OK
Check the wheel beearing.
(Refer to GROUP 26 - On-vehicle Service, and GROUP 27B
- Rear Hub Assembly.)
NG→Repair
OK
Check the following connectors:
<L.H. drive vehicles> B-123, A-03, A-37, D-10, D-04, D-30,
C-146, C-111, C-128, A-43
<R.H. drive vehicles> B-123, A-03, A-37, D-10, D-04, D-30,
C-146, C-111, C-128, C-136
NG→Repair
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)
Measure at 4WD-ECU connector C44.
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 the 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.
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 harness between the ABS-ECU and each wheel
speed sensor.
D
Check for open circuit, ground, and short circuit of the
output line.
D
Check for open circuit and damage of the earth line.
NG→Repair
YES
NO
Refer to GROUP 35B - Troubleshooting.
Are the four wheels mounted to normal tires.
NO→Repair
MUT-II Diagnosis Code
D
Are the ABS Diagnosis Code Nos.11, 12, 13, 14, 21, 22,
23, 24 output?
MANUAL TRANSMISSION - Troubleshooting <ACD>
22A-14
<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 bearing (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 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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