Mitsubishi Electric Lancer Evolution-VII Workshop Manual page 920

MANUAL TRANSMISSION - Troubleshooting <ACD>
Code No.26 Wheel speed sensor system (faulty output
signal)
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.
<Vehicles with ACD and AYC>
Are the four wheels mounted to normal tires.
NO→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.
OK→Intermittent malfunction (Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions)
Check the installation of the wheel speed sensor.
NG→Repair
Check the wheel speed sensor output voltage. (Refer to
GROUP 35B - On-vehicle Service.)
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.
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)
NG
OK
OK
OK
OK
Probable cause
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
YES MUT-II Diagnosis Code
D Are the ABS Diagnosis Code Nos.11, 12, 13, 14, 21, 22,
23, 24 output?
Refer to GROUP 35B - Troubleshooting.
NG
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
NG
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
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
Check the following connectors:
<L.H. drive vehicles> C-44, B-123
<R.H. drive vehicles> C-44, C-147, B-123
NG→Repair
Check the harness between the 4WD-ECU and ABS-ECU.
D Check for open circuit, ground and damage of the power
line.
NG→Repair
22A-13
YES
NO
OK
OK
OK
OK