Mitsubishi Evolution X. Manual — part 356

AC708948

Connector: A-05

A-05 (B)

AB

AC708951AG

C-38 (B)

Connector: C-38

AC708950CK

C-46

C-47

C-50 (B)

Connectors: C-46, C-47, C-50

DIAGNOSIS <S-AWC(SUPER ALL WHEEL CONTROL)>

TSB Revision

MANUAL TRANSAXLE

22A-73

CAUTION

• If there is any problem in the CAN bus lines,

an incorrect diagnostic trouble code may be
set. Prior to this diagnosis, diagnose the CAN
bus lines.

• Whenever the ECU is replaced, ensure that

the CAN bus lines are normal.

• Do not drop the G and yaw rate sensor or sub-

ject it to a shock.

• When G and yaw rate sensor is replaced, cali-

brate G and yaw rate sensor (refer to GROUP
35C

− On-vehicle Service

P.35C-266

), and ini-

tialize the lateral/longitudinal acceleration
correction amount stored in AWC-ECU. (Refer
to item No.10: Lateral acceleration correction
amount initialization, and No. 11: Longitudinal
acceleration correction amount initialization

P.22A-113

.)

.

OPERATION

AWC-ECU receives the self-diagnosis status of G
and yaw rate sensor.

.

DTC SET CONDITIONS

The code is set when low voltage status information
of G and yaw rate sensor power supply is received.

.

PROBABLE CAUSES

• Malfunction of G and yaw rate sensor

• Malfunction of ASC-ECU

• Damaged harness wires and connectors

• Malfunction of AWC-ECU

DIAGNOSTIC PROCEDURE

STEP 1. Scan tool CAN bus diagnostics
Using scan tool MB991958, diagnose the CAN bus lines.
Q: Is the check result normal?

YES : Go to Step 3.
NO : Repair the CAN bus lines. (Refer to GROUP 54C

−

Troubleshooting

P.54C-14

.) After repairing the CAN

bus line, go to Step 2.

DIAGNOSIS <S-AWC(SUPER ALL WHEEL CONTROL)>

TSB Revision

MANUAL TRANSAXLE

22A-74

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. C2114 set?

YES : Go to Step 3.
NO : This diagnosis is complete.

STEP 3. Scan tool diagnostic trouble code
Check the ASC diagnostic trouble code. (Refer to GROUP 35C
− Troubleshooting

P.35C-20

.)

Q: Is the DTC set?

YES : Perform the relevant troubleshooting.
NO : Go to Step 4.

STEP 4. ASC-ECU connector, G and yaw rate sensor
connector check: A-05, C-38
Q: Is the check result normal?

YES : Go to Step 5.
NO : Repair the defective connector. Then go to Step 10.

STEP 5. Voltage measurement at the C-38 G and yaw rate
sensor connector
(1) Disconnect the connector, and measure the voltage

between terminal No. 1 and ground at the harness side.

(2) Turn the ignition switch to the "ON" position.

OK: Battery positive voltage

Q: Is the check result normal?

YES : Go to Step 7.
NO : Go to Step 6.

STEP 6. Check the wiring harness between A-05 ASC-ECU
connector terminal No. 22 and C-38 G and yaw rate sensor
connector terminal No. 1.
Check the wiring harness for open or short circuit (short to
ground).
Q: Is the check result normal?

YES : Replace the ASC-ECU. (Refer to GROUP 35C

−

Hydraulic Unit

P.35C-272

.) Then go to Step 10.

NO : Repair the wiring harness. Then go to Step 10.

STEP 7. Check the wiring harness between A-05 ASC-ECU
connector terminal No. 29 and C-38 G and yaw rate sensor
connector terminal No. 5.
Check the wiring harness for open circuit.
Q: Is the check result normal?

YES : Go to Step 8.
NO : Repair the wiring harness. Then go to Step 10.

DIAGNOSIS <S-AWC(SUPER ALL WHEEL CONTROL)>

TSB Revision

MANUAL TRANSAXLE

22A-75

STEP 8. Scan tool service data
Check the following service data. (Refer to

P.22A-107

.)

• Item No. 26: Yaw rate sensor

• Item No. 29: Lateral G sensor

• Item No. 31: Longitudinal G sensor

• Item No. 75: G and yaw rate sensor low voltage abnormality

flag

Q: Is the check result normal?

YES : Go to Step 9.
NO : Replace the G and yaw rate sensor. (Refer to

GROUP 35C

− G and Yaw Rate Sensor

P.35C-278

.)

Then go to Step 9.

STEP 9. Check whether the DTC is reset.
Q: Is DTC No. C2114 set?

YES : Replace the AWC-ECU.(Refer to

P.22A-132

.) Then

go to Step 10.

NO : Intermittent malfunction. (Refer to GROUP 00

− How

to Cope with Intermittent Malfunction

P.00-15

.)

STEP 10. Check whether the DTC is reset.
Q: Is DTC No. C2114 set?

YES : Return to Step 1.
NO : This diagnosis is complete.

DTC C2115: G and Yaw Rate Sensor Power Supply (High Voltage)

.

G AND YAW RATE SENSOR POWER
SUPPLY

Refer to

P.22A-72

.

CAUTION

• If there is any problem in the CAN bus lines,

an incorrect diagnostic trouble code may be
set. Prior to this diagnosis, diagnose the CAN
bus lines.

• Whenever the ECU is replaced, ensure that

the CAN bus lines are normal.

• Do not drop the G and yaw rate sensor or sub-

ject it to a shock.

• When G and yaw rate sensor is replaced, cali-

brate G and yaw rate sensor (refer to GROUP
35C

− On-vehicle Service

P.35C-266

), and ini-

tialize the lateral/longitudinal acceleration
correction amount stored in AWC-ECU. (Refer
to item No.10: Lateral acceleration correction
amount initialization, and No. 11: Longitudinal
acceleration correction amount initialization

P.22A-113

.)

.

DIAGNOSIS <S-AWC(SUPER ALL WHEEL CONTROL)>

TSB Revision

MANUAL TRANSAXLE

22A-76

OPERATION

AWC-ECU receives the self-diagnosis status of G
and yaw rate sensor.

.

DTC SET CONDITIONS

The code is set when high voltage status information
of G and yaw rate sensor power supply is received.

.

PROBABLE CAUSES

• Malfunction of G and yaw rate sensor

• Malfunction of ASC-ECU

• Damaged harness wires and connectors

• Malfunction of AWC-ECU

DIAGNOSTIC PROCEDURE

STEP 1. Scan tool CAN bus diagnostics
Using scan tool MB991958, diagnose the CAN bus lines.
Q: Is the check result normal?

YES : Go to Step 3.
NO : Repair the CAN bus lines. (Refer to GROUP 54C

−

Troubleshooting

P.54C-14

.) After repairing the CAN

bus line, go to Step 2.

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. C2115 set?

YES : Go to Step 3.
NO : This diagnosis is complete.

STEP 3. Scan tool diagnostic trouble code
Check the ASC diagnostic trouble code. (Refer to GROUP 35C
− Troubleshooting

P.35C-20

.)

Q: Is the DTC set?

YES : Perform the relevant troubleshooting.
NO : Go to Step 4.

STEP 4. ASC-ECU connector, G and yaw rate sensor
connector check: A-05, C-38
Q: Is the check result normal?

YES : Go to Step 5.
NO : Repair the defective connector. Then go to Step 8.

STEP 5. Voltage measurement at the C-38 G and yaw rate
sensor connector
(1) Disconnect the connector, and measure the voltage

between terminal No. 1 and ground at the harness side.

(2) Turn the ignition switch to the "ON" position.

OK: Battery positive voltage

Q: Is the check result normal?

YES : Go to Step 8.
NO : Go to Step 6.