Mitsubishi 1992 3000GT, Service Manual

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SERVICE BRAKES Anti-lock Braking System Troubleshooting
1996 models>
DIAGNOSTIC TROUBLESHOOTING FLOW
Reoccurs
Does not reoccur
No diagnostic
trouble code or
Diagnostic trouble Diagnostic trouble
code displayed code displayed
Nodiagnostic
trouble code
can’t communicate
with scan tool
No diagnostic
trouble code
Diagnostic trouble
NOTES WITH REGARD TO DIAGNOSIS
The condition listed in the following table are considered normal.
Condition Explanation of condition
System check sound
ABS operation sound
When starting the engine, a thudding sound can sometimes be heard coming
from inside the engine compartment, but this is because the system operation
check is being performed. This is considered normal.
1.
2.
Sound of the motor inside the ABS hydraulic unit (HU) operating (whine)
3.
Sound is generated along with vibration of the brake pedal (scraping)
When ABS operates, sound is generated from the vehicle chassis due
to repeated brake application and release.
(Thump: suspension; squeak: tires)
ABS operation
(Long braking distance)
For road surfaces such as snow-covered roads and gravel roads, the braking
distance for vehicles with ABS can sometimes be longer than that for other
vehicles. Accordingly, advise the customer to drive safely on such roads by
lowering the vehicle speed and not being overconfident.
Diagnosis detection condition can vary depending on the diagnostic trouble code.
When checking to see if the trouble symptom reoccurs after the diagnostic trouble code has been erased,
check the memorize timing column in the inspection chart for diagnostic trouble codes (refer to
and the memorize conditions recorded in the “Comments” column of the inspection procedure chart for
diagnostic trouble codes in order to carry out testing under driving conditions which satisfy each of the
given conditions.
TSB Revision