Mitsubishi Evolution X. Manual - part 750
DIAGNOSIS
TSB Revision
ACTIVE SKID CONTROL SYSTEM (ASC)
35C-7
PRECAUTIONS FOR DIAGNOSIS
M1355009500113
1. ASC controls the brake pressure by the assistance of ECU.
The symptoms described in the table below may occur
during the normal ASC operation. However, they do not
indicate any sign of malfunction.
2. On snowy or gravel roads, a vehicle with ABS sometimes
requires a longer braking distance compared to the one
without ABS. Considering this characteristics, advise the
customer to drive the vehicle safely at lower speed and not
to place too much confidence on the ABS system when
driving on such roads.
3. The detection conditions of diagnostic trouble code differ
with each diagnostic trouble code. When the trouble
symptoms are rechecked, conditions described in the
description for the diagnostic trouble code procedures must
be satisfied.
ABS WARNING LIGHT AND BRAKE WARNING
LIGHT INSPECTION
M1352012000670
Check if the ABS warning light and brake warning light is illumi-
nated as follows.
NOTE: The brake warning light is used as the warning lights for
the parking brake, brake fluid level, and EBD control.
Symptoms
Description of symptoms
• When ASC operates, the operating noise is generated from
the motor integrated in the hydraulic unit. (Screech)
• Noise is generated from the brake pedal together with the
vibration. (Boom, boom)
• When ASC operates, the system repeats the activation and
deactivation. At this time, the noise is generated from the
chassis components. (Clunk: Suspension; Squeak: Tire)
These noises are generated when the
system and brake pedal operate
normally, and they do not indicate any
sign of malfunction.
• A slight shock is felt occasionally when the brake pedal is
depressed lightly during the low speed driving.
• Small clicking noise is heard occasionally from the engine
compartment.
This noise is generated when the system
operation check <startup check
performed when the vehicle speed is at
few km/h (mile)> is performed, and it
does not indicate any malfunction.