Mitsubishi Evolution X. Manual — part 345
DIAGNOSIS <S-AWC(SUPER ALL WHEEL CONTROL)>
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MANUAL TRANSAXLE
22A-29
STEP 8. Wheel alignment check
Q: Is the check result normal?
YES : After checking the wheel alignment, calibrate the
steering wheel sensor (refer to GROUP 35C
−
,) and initialize
AWC-ECU steering angle correction amount (refer to
.) Then go to Step 9.
NO : After adjusting the wheel alignment, calibrate the
steering wheel sensor (refer to GROUP 35C
−
,) and initialize
AWC-ECU steering angle correction amount (refer to
.) Then go to Step 9.
STEP 9. Scan tool service data
Item 11: Steering wheel sensor (refer to
.)
Q: Is the check result normal?
YES : Go to Step 10.
NO : Replace the steering wheel sensor. (Refer to GROUP
35C
− Steering Wheel Sensor
.) Then go to
Step 10.
STEP 10. Check whether the DTC is reset.
Q: Is DTC No. C123C set?
YES : Replace the AWC-ECU.(Refer to
.) Then
go to Step 11.
NO : Intermittent malfunction. (Refer to GROUP 00
− How
to Cope with Intermittent Malfunction
.)
STEP 11. Check whether the DTC is reset.
Q: Is DTC No. C123C set?
YES : Return to Step 1.
NO : This diagnosis is complete.
DTC C1242: G and Yaw Rate Sensor (Longitudinal G Output Data Error)
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
), 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
.)
.
OPERATION
The G and yaw rate sensor outputs the signal to
ASC-ECU and AWC-ECU via the special CAN bus
lines.
.
DTC set conditions
This diagnostic trouble code is set when the abnor-
mality below is detected:
DIAGNOSIS <S-AWC(SUPER ALL WHEEL CONTROL)>
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MANUAL TRANSAXLE
22A-30
• Abnormality in G and yaw rate sensor output
value
• This diagnostic trouble code is set when
AWC-ECU determines that an abnormality is
present by comparing the longitudinal G that is
output from the G and yaw rate sensor during
braking with the calculation value calculated by
the data from the wheel speed sensor.
.
PROBABLE CAUSES
• Improper installation of G and yaw rate sensor
• Malfunction of G and yaw rate sensor
• Malfunction of wheel speed sensor
• Malfunction of stoplight switch
• Malfunction of AWC-ECU
• Malfunction of ASC-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
.) After repairing the CAN
bus line, go to Step 2.
STEP 2. Check whether the DTC is reset.
Q: Is DTC No. C1242 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
Q: Is the DTC set?
YES : Perform the relevant troubleshooting.
NO : Go to Step 4.
STEP 4. Scan tool diagnostic trouble code
Q: Is DTC No. C2204 set?
YES : Perform the relevant troubleshooting.
NO : Go to Step 5.
STEP 5. Scan tool diagnostic trouble code
Check if the local CAN communication-related, stoplight
switch-related, or wheel speed sensor-related diagnostic trou-
ble code is set.
Q: Is the DTC set?
YES : Perform the relevant troubleshooting.
NO : Go to Step 6.
DIAGNOSIS <S-AWC(SUPER ALL WHEEL CONTROL)>
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MANUAL TRANSAXLE
22A-31
STEP 6. Check of G and yaw rate sensor installation status
Check that the G and yaw rate sensor is installed correctly.
(Refer to GROUP 35C
− G and Yaw Rate Sensor
Q: Is the check result normal?
YES : Go to Step 7.
NO : Reinstall the G and yaw rate sensor correctly. Then
go to Step 7.
STEP 7. Scan tool service data
Item No. 31: Longitudinal G sensor (refer to
Q: Is the check result normal?
YES : Go to Step 8.
NO : Replace the G and yaw rate sensor. (Refer to
GROUP 35C
Then go to Step 8.
STEP 8. Check whether the DTC is reset.
Q: Is DTC No. C1242 set?
YES : Replace the AWC-ECU.(Refer to
.) Then
go to Step 9.
NO : Intermittent malfunction. (Refer to GROUP 00
− How
to Cope with Intermittent Malfunction
.)
STEP 9. Check whether the DTC is reset.
Q: Is DTC No. C1242 set?
YES : Return to Step 1.
NO : This diagnosis is complete.
DTC C1610: AWC Actuator Power Supply Electronic Relay Malfunction
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.
.
OPERATION
A relay is incorporated in AWC-ECU, and the power
is supplied to the actuator via this relay.
.
DTC SET CONDITIONS
When the actuator power supply relay in AWC-ECU
is seized, the code is set.
.
PROBABLE CAUSES
• Malfunction of AWC-ECU
DIAGNOSIS <S-AWC(SUPER ALL WHEEL CONTROL)>
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MANUAL TRANSAXLE
22A-32
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
.) After repairing the CAN
bus line, go to Step 2.
STEP 2. Check whether the DTC is reset.
Q: Is DTC No. C1610 set?
YES : Replace the AWC-ECU.(Refer to
.)
NO : This diagnosis is complete.
STEP 3. Check whether the DTC is reset.
Q: Is DTC No. C1610 set?
YES : Replace the AWC-ECU.(Refer to
.)
NO : Intermittent malfunction. (Refer to GROUP 00
− How
to Cope with Intermittent Malfunction
.)
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