Mitsubishi Outlander GS45X. Manual — part 424
DIAGNOSIS
TSB Revision
ACTIVE STABILITY CONTROL SYSTEM (ASC)
35C-123
• MB991997: ASC check harness
STEP 1. Using scan tool MB991958, diagnose the CAN bus
lines.
Use scan tool to 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
−
CAN Bus Diagnostics Table
). On
completion, go to Step 2.
STEP 2. DTC recheck after resetting CAN bus lines
Q: Is DTC C1073 set?
YES : Go to Step 3.
NO : The procedure is complete.
STEP 3. Battery check
Refer to GROUP 54A
− Battery Test
.
Q: Is the battery in good condition?
YES : Go to Step 5.
NO : Replace the battery. Then go to Step 4.
STEP 4. Charging system check
Refer to GROUP 16
− On−vehicle Service/Output Current Test
Q: Is the charging system in good condition?
YES : Go to Step 5.
NO : Repair or replace the charging system component(s).
Then go to Step 11.
STEP 5. Connector check: A-02 ASC-ECU connector
Q: Is the check result normal?
YES : Go to Step 6.
NO : Repair the defective connector. Then go to Step 11.
STEP 6. Fusible link check: Check the fusible link No.26.
Visually check for open circuit in the fusible link No.26.
Q: Is the check result normal?
DIAGNOSIS
TSB Revision
ACTIVE STABILITY CONTROL SYSTEM (ASC)
35C-124
STEP 7. Resistance measurement at A-02 ASC-ECU
connector
(1) Disconnect the ASC-ECU connector, connect special tool
ASC check harness (MB991997) to the harness-side
connector, and then measure the resistance at the special
tool connector side.
NOTE: Do not connect the special tool ASC check harness
(MB991997) to ASC-ECU.
(2) Disconnect the fusible link No.26.
(3) Measure the resistance between the terminal No.1 and the
body ground.
OK: No continuity
Q: Is the check result normal?
YES : Replace the fusible link No.26. Then go to Step 11.
NO : The short circuit may be present in the power supply
circuit. Repair the wiring harness between the A-02
ASC-ECU connector terminal No.1 and the fusible
link No.26, and then replace the fusible link No.26.
Then go to Step 11.
STEP 8. Voltage measurement at the A-02 ASC-ECU
connector
(1) Disconnect the ASC-ECU connector, connect special tool
ASC check harness (MB991997) to the harness-side
connector, and then measure the voltage at the special tool
connector side.
NOTE: Do not connect the special tool ASC check harness
(MB991997) to ASC-ECU.
(2) Measure the voltage between the terminal No.1 and the
body ground.
OK: Approximately system voltage
Q: Is the check result normal?
YES : Go to Step 9.
NO : The open circuit may be present in the power supply
circuit. Repair the wiring harness between the A-02
ASC-ECU connector terminal No.1 and the fusible
link No.26. Then go to Step 11.
AC611137 BW
ASC-ECU
MB991997
A-02 ASC-ECU
harness connector
Check harness
AC611137 BJ
ASC-ECU
MB991997
A-02 ASC-ECU
harness connector
Check harness
DIAGNOSIS
TSB Revision
ACTIVE STABILITY CONTROL SYSTEM (ASC)
35C-125
STEP 9. Resistance measurement at A-02 ASC-ECU
connector
(1) Disconnect the ASC-ECU connector, connect special tool
ASC check harness (MB991997) to the harness-side
connector, and then measure the resistance at the special
tool connector side.
NOTE: Do not connect the special tool ASC check harness
(MB991997) to ASC-ECU.
(2) Measure the resistance between the terminal No.16 and the
body ground, and between the terminal No.47 and the body
ground.
OK: Continuity exists (2
Ω or less)
Q: Is the check result normal?
YES : Go to Step 10.
NO : An open circuit may be present in the ground circuit.
Repair the wiring harness between the A-02
ASC-ECU connector terminal No.16 and the body
ground, and between the A-02 ASC-ECU connector
terminal No.47 and the body ground. Then go to Step
11.
STEP 10. Check whether the DTC is reset.
(1) Erase the DTC.
(2) Drive the vehicle at 12 mph (20 km/h) or higher.
NOTE: The ABS warning light does not turn OFF in some
cases unless the vehicle runs at 12 mph (20 km/h) or
higher.
Q: Is DTC C1073?
YES : Replace the hydraulic unit (integrated with ASC-ECU)
(Refer to
NO : Intermittent malfunction (Refer to GROUP 00
− How
to Use Troubleshooting/How to Cope with Intermittent
Malfunctions
).
STEP 11. Check whether the DTC is reset.
(1) Erase the DTC.
(2) Drive the vehicle at 12 mph (20 km/h) or higher.
NOTE: The ABS warning light does not turn OFF in some
cases unless the vehicle runs at 12 mph (20 km/h) or
higher.
Q: Is DTC C1073?
YES : Return to Step 1.
NO : The procedure is complete.
AC611137
ASC-ECU
MB991997
A-02 ASC-ECU
harness connector
Check harness
BK
DIAGNOSIS
TSB Revision
ACTIVE STABILITY CONTROL SYSTEM (ASC)
35C-126
DTC C2116: Low or high power supply voltage in pump motor
16
47
GND
GND
AC703902
Solenoid Valve and Motor Power Supply Circuit
FUSIBLE
LINK
27
FUSIBLE
LINK
26
ASC-ECU
SOLENOID
VALVE
POWER
SOURCE
MOTOR
POWER
SOURCE
MOTOR
POWER
SOURCE
SOLENOID
VALVE
POWER
SOURCE
SOLENOID VALVE
HYDRAULIC UNIT
MOTOR
AB
AC901112
Connector: A-02
A-02 (B)
AF
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