Mitsubishi Electric Lancer Evolution-VII Workshop Manual page 924

MANUAL TRANSMISSION - Troubleshooting <ACD>
Code No.34 Steering wheel sensor <ST-1, ST-2> system
Code No.34 is output when no change in the steering wheel sensor signal at a
vehicle speed of above 15 km/h is detected for a total of more than 15 minutes
<ST-1, ST-2>, and turning is detected during this time.
MUT-II Data List
D No.53 Steering wheel sensor <ST-1>
OK: When the steering wheel is rotated to the left, ON
and OFF are repeated.
D No.54 Steering wheel sensor <ST-2>
OK: When the steering wheel is rotated to the right, ON
and OFF are repeated.
OK→Intermittent malfunction (Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions)
Measure at 4WD-ECU connector C-43.
D Measure the ECU terminal voltage.
D Ignition switch: ON
(1) Voltage between terminal 33 and earth (Steering wheel
sensor <ST-1>)
(2) Voltage between terminal 34 and earth (Steering wheel
sensor <ST-2>)
OK: When the steering wheel is turned, changes at
approx. 1.5 V or 3.5 V
Check the following connectors:
<L.H. drive vehicles> C-230, C-128, C-43
<R.H. drive vehicles> C-230, C-43
NG→Repair
Check the harness between the 4WD-ECU and steering wheel
sensor.
D Check for damage of the output line.
Check the harness between the steering wheel sensor and
body earth.
D Check for open circuit and damage of the earth line.
NG→Repair
Replace the steering wheel sensor.
NG
OK
NG
OK
OK
Probable cause
D Harness or connector fault
D Steering wheel sensor fault
D 4WD-ECU fault
Check the following connector: C-43
NG→Repair
MUT-II Data List
D No.53 Steering wheel sensor <ST-1>
OK: When the steering wheel is rotated to the left, ON
and OFF are repeated
D No.54 Steering wheel sensor <ST-2>
OK: When the steering wheel is rotated to the right ON
and OFF are repeated.
NG→Replace the 4WD-ECU.
OK→Intermittent malfunction (Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
22A-17
OK