Mitsubishi Evolution X. Manual — part 354
DIAGNOSIS <S-AWC(SUPER ALL WHEEL CONTROL)>
TSB Revision
MANUAL TRANSAXLE
22A-65
STEP 3. Voltage measurement at F-13 AWC pressure
sensor connector
(1) Disconnect the connector, and measure the voltage
between the terminal No. 1 and the body ground.
(2) Turn the ignition switch to the "ON" position.
OK: Approx. 5 V
Q: Is the check result normal?
YES : Go to Step 6.
NO : Go to Step 4.
STEP 4. AWC-ECU connector, AWC pressure sensor
connector check: C-46, F-13
Q: Is the check result normal?
YES : Go to Step 5.
NO : Repair the defective connector. Then go to Step 8.
STEP 5. Check the wiring harness between C-46 AWC-ECU
connector terminal No. 6 and F-13 AWC pressure sensor
connector terminal No. 1.
Check the power supply line for short or open circuit.
Q: Is the check result normal?
YES : Go to Step 6.
NO : Check D-11 intermediate connector. When no
problem is found, repair the wiring harness. Then go
to Step 8.
STEP 6. Scan tool service data
Item No. 86: Pressure sensor power supply voltage (Refer to
service data reference table
Q: Is the check result normal?
YES : Go to Step 7.
NO : Replace the hydraulic unit. (Refer to GROUP 27
−
Hydraulic Unit
.) Then go to Step 7.
STEP 7. Check whether the DTC is reset.
Q: Is DTC No. C1625 set?
YES : Replace the AWC-ECU.(Refer to
.) Then
go to Step 8.
NO : Intermittent malfunction. (Refer to GROUP 00
− How
to Cope with Intermittent Malfunction
.)
STEP 8. Check whether the DTC is reset.
Q: Is DTC No. C1625 set?
YES : Return to Step 1.
NO : This diagnosis is complete.
DIAGNOSIS <S-AWC(SUPER ALL WHEEL CONTROL)>
TSB Revision
MANUAL TRANSAXLE
22A-66
DTC C2100: Battery Voltage Malfunction (Low Voltage)
ETACS-ECU
IGNITION
SWITCH (IG1)
FUSIBLE
LINK
34
IG1
RELAY
JOINT
CONNECTOR
(3)
JOINT
CONNECTOR
(5)
JOINT
CONNECTOR
(4)
POWER
SUPPLY
S-AWC-ECU
Power supply system circuit
AC708950CJ
C-41
C-46
C-43 (B)
Connectors: C-41, C-43, C-46
AC708950
Connector: C-103
BO
C-103 (B)
AC708972BJ
Connectors: C-309, C-313, C-315, C-317
ETACS-ECU
C-315
C-317
C-309 (B)
C-313 (BR)
AC708955AZ
D-27 (B)
Connector: D-27
DIAGNOSIS <S-AWC(SUPER ALL WHEEL CONTROL)>
TSB Revision
MANUAL TRANSAXLE
22A-67
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
AWC-ECU power supply is provided from the battery
via ETACS-ECU.
.
DTC SET CONDITIONS
This diagnostic trouble code is set when the abnor-
mality below is detected:
• When the AWC-ECU power supply voltage and
solenoid valve power supply voltage are 9 V or
less.
• When ASC-ECU low voltage is detected.
.
PROBABLE CAUSES
• Malfunction of ASC-ECU
• Malfunction of the ETACS-ECU
• Defective battery
• Charging system failed
• 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
.) After repairing the CAN
bus line, go to Step 2.
STEP 2. Check whether the DTC is reset.
Q: Is DTC No. C2100 set?
YES : Go to Step 3.
NO : This diagnosis is complete.
DIAGNOSIS <S-AWC(SUPER ALL WHEEL CONTROL)>
TSB Revision
MANUAL TRANSAXLE
22A-68
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
Check the ETACS diagnostic trouble code. (Refer to GROUP
54A
− Troubleshooting
.)
Q: Is the DTC set?
YES : Perform the relevant troubleshooting.
NO : Go to Step 5.
STEP 5. Check the battery.
Refer to GROUP 54A
− Battery Test
.
Q: Is the check result normal?
YES : Go to Step 7.
NO : Charge or replace the battery. Then go to Step 6.
STEP 6. Check the charging system.
Refer to GROUP 16
− Charging System
Q: Is the check result normal?
YES : Go to Step 7.
NO : Repair or replace the charging system component(s).
STEP 7. Voltage measurement at C-46 AWC-ECU
connector
Measure the voltage between C-46 AWC-ECU connector ter-
minal No.12
− and the body ground.
OK: Battery positive voltage
Q: Is the check result normal?
YES : Go to Step 11.
NO : Go to Step 8.
STEP 8. AWC-ECU connector, ETACS-ECU connector
check: C-46, C-315
Q: Is the check result normal?
YES : Go to Step 9.
NO : Repair the defective connector. Then go to Step 14.
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