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A B S / T C S Components
S y s t e m D e s c r i p t i o n ( c o n t ' d )
Self-Diagnosis
• The ABS/TCS control unit is equipped w i t h a main CPU and a m o n i t o r IC. They check each other for problems.
• The CPUs also check the circuit of the system.
• W h e n a problem is detected by self-diagnosis, the ABS/TCS control unit turns on the appropriate indicator(s).
DTC
Detection Item
A B S
Brake
T C S
T C S
indicator
system
indicator
indicator
activation
indicator
11, 13, 15, 17
Wheel sensor (open/short to body g r o u n d /
short to power)
ON
ON or OFF
ON
ON
12, 14, 16, 18
Wheel sensor (electrical noise/intermittent
interruption)
ON
ON or OFF
ON
ON
2 1 , 22
Magnetic encoder
ON
ON or OFF
ON
ON
23, 24
Magnetic encoder
ON
ON or OFF
ON
ON
3 1 , 3 2 , 33, 34,
ABS solenoid
ON
ON
ON
ON
35, 36, 37, 38
4 1 , 42, 43, 44
Wheel lock
ON
ON or OFF
ON
ON
51
Motor lock
ON
OFF
ON
ON
52
Motor stuck OFF
ON
OFF
ON
ON
53
Motor stuck ON
ON
OFF
ON
ON
54
ABS fail-safe relay
ON
ON
ON
ON
61
Low +B-FSR voltage
ON
ON or OFF
ON
ON
62
High +B-FSR voltage
ON
ON
ON
ON
64
Sensor power voltage
OFF
OFF
ON
ON
65
Brake fluid level
OFF
OFF
ON
ON
66
TCS pressure sensor (inside of ABS/TCS
modulator-control unit)
OFF
OFF
ON
ON
68
Brake pedal position switch
OFF
OFF
ON
ON
71
Different diameter tire
ON or OFF
ON or OFF
ON
ON
81
Central Processing Unit (CPU)
ON
ON
ON
ON
83
PCM
OFF
OFF
ON
ON
84
TCS pressure sensor neutral position
OFF
OFF
ON
ON
86
F-CAN c o m m u n i c a t i o n
OFF
OFF
ON
ON
107
TCS operation
OFF
OFF
OFF
ON
112
Internal power source stuck OFF
ON
ON
ON
ON
121, 122,
TCS solenoid
ON
ON
ON
ON
123, 124
On-board Diagnosis Function
The ABS and TCS can be diagnosed w i t h the HDS.
The ALB Checker cannot be used w i t h this system. For air bleeding, and checking w h e e l sensor signals, use the HDS.
See the HDS Help menu for specific operating instructions.
19-44
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Troubleshooting
