Self-Diagnostics; Intermittent And Poor Connections - SSANGYONG Rexton Y200 Manual

4E-38 ABS AND TCS

SELF-DIAGNOSTICS

Important: The electronic brake control module (EBCM)
turns the valve relay off when a diagnostic trouble code
(DTC) is set. The scan tool will indicate that the valve
relay is off when it is used to monitor the data list. This
is normal and should not be considered a malfunction.
The EBCM performs system self-diagnostics and can
detect and often isolate system malfunctions, When it
detects a malfunction, the EBCM sets a DTC that
represents the malfunction, turns on the ABS and/or
the TCS indicators in most instances, and may disable
the ABS and/or the TCS function, as necessary, for
the duration of the ignition cycle.
Once each ignition cycle, the EBCM performs an
automatic test when the vehicle reaches 2.75 km/h (1.7
mph). In the course of this test, the system cycles
each valve solenoid and the pump motor, along with
the necessary relays, to check component operation.
If the EBCM detects any malfunctions, it will set a
DTC as described above.
DISPLAYING DTCs
Tools Required
Scan Tool
DTCs can be read through the use of the scan tool.
CLEARING DTCs
Tool Required
Scan Tool
The diagnostic trouble codes (DTCs) in the electronic
brake control module (EBCM) memory are erased in
one of two ways:
•
Use the scan tool "Clear DTCs" selection.
•
After 249 DTC-free ignition cycles.
These two methods are detailed below. Be sure to
verify the proper system operation and, the absence
of DTCs when the clearing procedure is completed.
The EBCM will not permit DTC clearing until all DTCs
have been displayed. Also, ETC s cannot be cleared
by disconnecting the EBCM, disconnecting the battery
cables, or turning the ignition switch to LOCK.
Scan Tool Method
The scan tool can clear ABS/TCS system DTCs using
the mess storage cartridge.
1. Install the scan tool and the mass storage cartridge.
2. Select "Fault Memory".
3. Select "Clear Fault Memory".
Clearing the fault memory cannot reset a valve relay
which was shut down when the fault was recognized.
Changes are possible only after the fault has been
eliminated and the next ignition cycle has begun.
Ignition Cycle Default
A DTC is erased from memory after 249 ignition cycles
without any reappearance of that malfunction.
INTERMITTENT AND POOR
CONNECTIONS
As with most electronic systems, intermittent
malfunctions may be difficult to diagnose accurately,
The following is a method to try to isolate an intermittent
malfunction, especially in wheel speed circuitry.
If an ABS malfunction occurs, the ABS indicator will
illuminate during the ignition cycle in which the
malfunction was detected. If it is an intermittent
problem which seems to have corrected itself (ABS
indicator OFF), a history DTC will be stored. Also stored
will be the history data of the DTC at the time the
malfunction occurred. Use the scan tool modular
diagnostic system to read ABS history data.
Most intermittents are caused by faulty electrical
connections or wiring, although a sticking relay or
solenoid can occasionally be at fault.
SSANGYONG Y200