Mitsubishi Lancer Evolution 7. Manual — part 248

MANUAL TRANSMISSION - Troubleshooting <ACD>

22A-15

Code No.31 Steering wheel sensor <ST-1, ST-2, ST-N>

system

Probable cause

Code No.31 is output when open circuit or short circuit of the steering wheel

sensor output line (ST-1, ST-2, or ST-N) occurs.

D

Steering wheel sensor fault

D

Harness or connector fault

D

4WD-ECU fault

OK

NG

NO

OK

MUT-II Data List
D

No.21 Steering wheel sensor

voltage <ST-1>

D

No.22 Steering wheel sensor

voltage <ST-2>

D

No.23 Steering wheel sensor

voltage <ST-N>

OK: Refer to P.22A-35 (Data

List Reference Table).

OK→Intermittent malfunction (Refer

to GROUP 00 - Points to Note for

Intermittent Malfunctions)

Check the following connector: C-43

NG→Repair

YES

MUT-II Diagnosis Code
D

Are the ABS Diagnosis Code

Nos.81, 82, 83 output?

MUT-II Data List
D

No.21 Steering wheel sensor voltage <ST-1>

D

No.22 Steering wheel sensor voltage <ST-2>

D

No.23 Steering wheel sensor voltage <

ST-N>

OK: Refer to P.22A-35 (Data List Reference Table).

NG→Replace the 4WD-ECU.

OK→Intermittent malfunction (Refer to GROUP 00 - Points to

Note for Intermittent Malfunctions)

NG (No change from 0 V or

from above 4.5 V)

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>)

(3) Voltage between terminal

44 and earth (Steering wheel

sensor <ST-N>)

OK: When the steering wheel is turned, changes at

approx. 1.5 V – 3.5 V.

(1) NG

NG (Changes at 1 V

- 4.5 V or more)

OK

Check the harness between the steering wheel sensor and

ignition switch.
D

Check for open circuit, ground and damage of the power

line.

NG→Repair

Check the following connectors: C-230, C-102, C-209,

C-210

NG→Repair

OK

OK

Check the following connectors:

<L.H. drive vehicles> C-230, C-128, C-43

<R.H. drive vehicles> C-230, C-43

NG→Repair

OK

Check the harness between 4WD-ECU and steering

wheel sensor.
D

Check for open circuit, short circuit, and damage of

the output line.

NG→Repair

Replace the steering wheel sensor.

Replace the Steering wheel sensor.

OK

OK

Check the following connector:

C-230

NG→Repair

NG

Measure at Steering wheel sensor

connector C-230.
D

Disconnect the connector and

measure at the harness side.

D

Ignition switch: ON

D

Voltage between terminal 2 and

earth

OK: System voltage

D

Resistance between terminal 3

and body earth

OK: 2 Ω or less

OK

Check the following connectors:

C-230, C-102, C-209, C-210

NG→Repair

Check the harness between the

ignition switch and steering wheel

sensor.
D

Check for open circuit and

damage on power line.

NG→Repair

(2) NG

OK

Check the harness between the steering wheel sensor and

body earth.
D

Check for open circuit and damage of the earth line.

NG→Repair

Check the following connector: C-230, C-08

NG→Repair

Measure at steering wheel sensor connector C-230.
D

Disconnect the connector and measure at the

harness side.

D

Ignition switch: ON

(1) Voltage between terminal 2 and earth

OK: System voltage

(2) Resistance between terminal 3 and body earth

OK: 2 Ω or less

MANUAL TRANSMISSION - Troubleshooting <ACD>

22A-16

Code No.32, 33 Steering wheel sensor <ST-N> system

Probable cause

Code No.32 is output when the steering wheel sensor ST-N has been detected

at the neutral position in a state where the steering wheel has been determined

to have changed above 40_C from steering wheel sensor ST-1 and ST-2.

Code No.33 is output when the steering wheel sensor ST-N has been detected

at the neutral position in a state where the steering wheel has been determined

to have changed above 400_C from steering wheel sensor ST-1 and ST-2.

D

Harness or connector fault

D

Steering wheel sensor fault

D

4WD-ECU fault

NG

OK

MUT-II Data List
D

No.52 Steering wheel sensor <ST-N>

(1) Steering wheel: Neutral

OK: ON

(2) Steering wheel: Turn from neutral position

OK: OFF

OK→Intermittent malfunction (Refer to GROUP 00 - Points to

Note for Intermittent Malfunctions)

Check the following connector: C-43

NG→Repair

NG

Check the following connectors:

<L.H. drive vehicles> C-230, C-128, C-43

<R.H. drive vehicles> C-230, C-43

NG→Repair

OK

Replace the steering wheel sensor.

OK

Measure at 4WD-ECU connector C-43.
D

Measure the ECU terminal voltage.

D

Ignition switch: ON

D

Voltage between terminal 44 and earth (Steering wheel

sensor <ST-N>)

OK: When the steering wheel is turned, changes to

approx. 1.5 V or 3.5 V.

MUT-II Data List
D

No.52 Steering wheel sensor <

ST-N>

(1) Steering wheel: Neutral

OK: ON

(2) Steering wheel: Turn from the neutral position

OK: OFF

NG→Replace 4WD-ECU.

OK→Intermittent malfunction (Refer to GROUP 00 - Points to

Note for Intermittent Malfunctions)

OK

Check the harness between the 4WD-ECU and steering wheel

sensor.
D

Check for damage of the output line.

Check the damage between the steering wheel sensor and

body earth.
D

Check for open circuit and damage of the earth line.

NG→Repair

MANUAL TRANSMISSION - Troubleshooting <ACD>

22A-17

Code No.34 Steering wheel sensor <ST-1, ST-2> system

Probable cause

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.

D

Harness or connector fault

D

Steering wheel sensor fault

D

4WD-ECU fault

NG

OK

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)

Check the following connector: C-43

NG→Repair

NG

Check the following connectors:

<L.H. drive vehicles> C-230, C-128, C-43

<R.H. drive vehicles> C-230, C-43

NG→Repair

OK

Replace the steering wheel sensor.

OK

OK

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

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

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.)

MANUAL TRANSMISSION -

Troubleshooting <ACD>

22A-18

Code No.41, 42 TPS system

Probable cause

Code No.41 is output as excessively small output when the TPS output is below

0.2 V In the idling state.

Code No.42 is output as excessively large output when the TPS output is more

than 4.8 V for more than 2 minutes continuously below a vehicle speed of 10

km/h.

D

TPS fault

D

Harness or connector fault

D

4WD-ECU fault

OK

OK

NG

NG

NO

Measure at 4WD-ECU connector C-43.
D

Measure the ECU terminal voltage.

D

Ignition switch: ON

D

Voltage between terminal 39 and earth

(1) Accelerator pedal: Full closed

OK: 535 - 735 mV

(2) Accelerator pedal: Full throttle

OK: 4,500 - 5,000 mV

Check the following connectors:

<L.H. drive vehicles> C-43, C-108, B-02

<R.H. drive vehicles> C-43, C-147, C-108, B-02

NG→Repair

MUT-II Data List
D

No.13 TPS voltage

OK: Refer to P.22A-35 (Data List Reference Table).

OK→Intermittent malfunction (Refer to GROUP 00 - Points to

Note for Intermittent Malfunctions)

OK

Check the following connector: C-43

NG→Repair

MUT-II Data List
D

No.13 TPS voltage

OK: Refer to P.22A-35 (Data List Reference Table).

NG→Replace 4WD-ECU.

OK→Intermittent malfunction (Refer to GROUP 00 - Points to

Note for Intermittent Malfunctions)

Check the harness between TPS and 4WD-ECU.
D

Check for open circuit, ground, and damage of the output

line.

NG→Repair

OK

Adjust the TPS (Refer to GROUP 13A - On-vehicle Service.)

YES

Refer to GROUP 13A - Troubleshooting.

MUT-II Diagnosis Code
D

Is the MPI diagnosis code No.P0120 output?