Mitsubishi Outlander XL. Manual — part 692
DIAGNOSIS
Required Special Tools:
⦆
MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆
MB991824: Vehicle Communication Interface (V.C.I.)
⦆
MB991827: M.U.T.-III USB Cable
⦆
MB991910: M.U.T.-III Main Harness A
STEP 1. M.U.T.-III diagnostic trouble code
Q:Is any DTC set?
YES:
Troubleshoot for the relevant diagnostic trouble
code.
NO:
Go to Step 2.
STEP 2. Hydraulic unit (HU) check
Refer to P.35C-188.
Q:Is the check result normal?
YES:
Go to Step 3.
NO:
Repair the brake pipe or replace ASC-ECU.
STEP 3. Operation check
Q:Does traction control function or skid control function
operate normally?
YES:
The procedure is complete.
NO:
Check the brake system related components except the
ASC.
ACTIVE SKID CONTROL SYSTEM (ASC)
35C-175
DIAGNOSIS
Inspection Procedure 12: ASC-ECU Power Supply Circuit System
M13506100096USA0000010000
Solenoid Valve,Motor and ASC-ECU Power Supply Circuit
FUSIBLE
LINK
27
FUSIBLE
LINK
26
ETACS-
ECU
POWER
SOURCE
ASC-ECU
SOLENOID
VALVE
POWER
SOURCE
MOTOR
POWER
SOURCE
IGNITION
SWITCH
FUSIBLE
LINK
34
IG1
RELAY
SYSTEM OPERATION
⦆
The ASC-ECU power supply signal energized by the ignition
switch (IG1) is transmitted to ASC-ECU (terminal No. 4) via
the multi-purpose fuse No.12.
⦆
The ASC-ECU power supply and the valve power supply are
transmitted to ASC-ECU (terminal No. 32) via the fusible link
No. 27.
⦆
When malfunction occurs in ASC-ECU power supply, the
communication with scan tool becomes unavailable.
PROBABLE CAUSES
⦆
Damaged wiring harness and connectors
35C-176
ACTIVE SKID CONTROL SYSTEM (ASC)
DIAGNOSIS
⦆
Battery failure
⦆
Charging system failed
⦆
ASC-ECU malfunction
DIAGNOSIS
Required Special Tools:
⦆
MB991958: Scan Tool (M.U.T.-III Sub Assembly)
⦆
MB991824: Vehicle Communication Interface (V.C.I.)
⦆
MB991827: M.U.T.-III USB Cable
⦆
MB991910: M.U.T.-III Main Harness A
⦆
MB991997: ASC check harness
STEP 1. Voltage measurement at the A-02 ASC-ECU
connector
ZC601293 0012
ASC-ECU
MB991997
Check harness
A-02 ASC-ECU
harness connector
(1)
Disconnect the connector, connect special tool MB991997 to
the harness-side connector, and measure the voltage at the
special tool connector side.
NOTE:
Do not connect the special tool MB991997 to ASC-
ECU.
(2)
Turn the ignition switch to the ON position.
(3)
Measure the voltage between terminal No. 4 and body
ground.
OK: 12 volts (Battery voltage)
Q:Is the check result normal?
YES:
Go to Step 2.
NO:
Go to Step 6.
ACTIVE SKID CONTROL SYSTEM (ASC)
35C-177
DIAGNOSIS
STEP 2. Voltage measurement at the A-02 ASC-ECU
connector
ZC601293 0008
ASC-ECU
MB991997
Check harness
A-02 ASC-ECU
harness connector
(1)
Disconnect the connector, connect special tool MB991997 to
the harness-side connector, and measure the voltage at the
special tool connector side.
NOTE:
Do not connect the special tool MB991997 to ASC-
ECU.
(2)
Turn the ignition switch to the ON position.
(3)
Measure the voltage between the terminal No. 32 and the
body ground.
OK: 12 volts (Battery voltage)
Q:Is the check result normal?
YES:
Go to Step 4.
NO:
Go to Step 3.
STEP 3. Connector check: A-02 ASC-ECU connector
Q:Is the check result normal?
YES:
Repair the wiring harness between the fusible link
No. 27 and the A-02 ASC-ECU connector terminal No. 32.
NO:
Repair the defective connector.
35C-178
ACTIVE SKID CONTROL SYSTEM (ASC)
DIAGNOSIS
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