Mitsubishi Outlander (2013+). Manual - part 473
TROUBLESHOOTING
ACTIVE STABILITY CONTROL SYSTEM (ASC)
35C-67
• ASC-ECU calculates the estimated temperature
of the brake pad. In general, as the brake pad
temperature increases, the coefficient of friction
for the brake pad becomes smaller, resulting in
the reduced braking force. When the estimated
temperature of the brake pad reaches the speci-
fied value or more, ASC-ECU flashes the ASC
OFF lamp at a rate of 2 Hz to warn the driver that
the brake controllability by TCL is decreased by
the reduced braking force. Consequently,
ASC-ECU prohibits the TCL control (brake con-
trol only) until it determines that the estimated
temperature of the brake pad is normal.
PROBABLE CAUSES
• Overheat of brake pad
Inspection Procedure 3: Brake warning lamp stays ON with the parking brake lever released (ABS
warning lamp is OFF).
CAUTION
• If there is any problem in the CAN bus lines,
an incorrect diagnosis code may be set. Prior
to this diagnosis, diagnose the CAN bus lines
(Refer to GROUP 54C
− CAN Bus Diagnostics
Table ).
• Whenever ECU is replaced, ensure that the
CAN bus lines are normal.
OPERATION
• When the parking brake switch is turned ON, the
combination meter (BRK terminal) is earthed, and
the brake warning lamp illuminates.
• When reduction of the brake fluid amount is
detected, the brake fluid level switch is turned
from ON to OFF. ETACS-ECU monitors the brake
fluid level switch, and instructs the combination
meter via the CAN bus line to illuminate the brake
warning lamp.
PROBABLE CAUSES
• The brake pad thickness is at the limit value or
less.
• The brake fluid amount is at the "LOWER" level
or lower.
• Poor adjustment of the parking brake lever
• Damaged wiring harness and connectors
• Parking brake switch malfunction
• Malfunction of brake fluid level switch
• Combination meter malfunction
• Malfunction of ETACS-ECU
DIAGNOSTIC PROCEDURE
STEP 1. M.U.T.-III CAN bus diagnostics
Use M.U.T.-III to diagnose the CAN bus lines.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the CAN bus lines (Refer to GROUP
54C
− CAN Bus Diagnostics Table ).
STEP 2. M.U.T.-III diagnosis code for other
systems.
Use M.U.T.-III to check that the diagnosis code is set
in the combination meter and ETACS-ECU.
Q: Is the diagnosis code set?
YES :
Carry out the diagnosis for the diagnosis
code.
NO :
Go to Step 3.
STEP 3. Brake fluid level check
Check that the brake fluid is filled up to the "MIN"
level or higher.
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Go to Step 4.
STEP 4. Brake pad check
Refer to GROUP 35A
− On-vehicle Service/Brake
Pad Check .
Q: Is the check result normal?
YES :
Fill the brake fluid up to the "MAX" level.
Then go to Step 5.
NO :
Replace the brake pad (Refer to GROUP
35A
− On-vehicle Service/Brake Pad
Replacement ). Then go to Step 14.
STEP 5. M.U.T.-III data list for other system
Check the ETACS-ECU system data list.
Item No.
Item name Normal condition
279
Brake fluid
switch
ON
Q: Is the check result normal?
YES :
Go to Step 10.
NO :
Go to Step 6.