ABS Operation Mode Table
Operation
Mode
Description
ABS
Indicator
TCS
Indicator
Brake
System
Indicator
On-board Diagnosis Function
19-98
ABS/TCS Components
System Description (cont’d)
Regular
operation
Operation in normal condition.
OFF
OFF
OFF
EBD Operation
Electronic Brake Distribution (EBD) operation.
OFF
OFF
OFF
Fail-safe
mode-S1
The ABS/TCS control unit turns the system off (ABS fail-
safe relay off) when the control unit detects a problem.
ON
ON
ON
Fail-safe
mode-A1
If the ABS/TCS control unit detects a malfunction while
the ABS, TCS, or EBD is operating, it will turn off the
malfunctioning component, and continue to modulate the
rest of the ABS system until completing the ABS, TCS, or
EBD operation. At that time, the entire system will be
turned off until the problem goes away.
ON
ON
ON
Fail-safe
mode-A0
If the ABS/TCS control unit detects a malfunction while
the ABS, TCS, or EBD is operating, it will turn off the
malfunctioning component, and continue to modulate the
rest of the ABS system until completing the ABS, TCS, or
EBD operation. At that time, the entire system will be
turned off until the problem goes away.
ON
ON
OFF
Fail-safe
mode-L1
The ABS/TCS control unit stores a DTC in back-up
memory when it detects a problem. If a problem is
detected when the ignition switch is turned ON (II), the
ABS/TCS control unit will turn the system off. If the
problem goes away, the ABS/TCS control unit will turn
the system on again.
ON
ON
ON
Fail-safe
mode-L0
The ABS/TCS control unit stores a DTC in back-up
memory when it detects a problem. If a problem is
detected when the ignition switch is turned ON (II), the
ABS/TCS control unit will turn only the ABS system off. If
the problem goes away, the ABS/TCS control unit will
turn the ABS system on again.
ON
ON
OFF
Fail-safe
mode-B1
The ABS/TCS control unit will turn the system off, if the
ignition voltage drops, and will turn it on again when the
ignition voltage returns to normal.
ON
ON
ON
Fail-safe
mode-B0
The ABS/TCS control unit will turn only the ABS system
off, if the ignition voltage drops, and will turn it on again
when the ignition voltage returns to normal.
ON
ON
OFF
The ABS can be diagnosed with the HDS.
The ALB Checker cannot be used with this system. For air bleeding, and checking wheel sensor signals, use the HDS.
See the HDS help menu for specific operating instructions.
03/07/29 09:56:09 61S0X050_190_0098