Page 1777 of 2248
B4M0490
C: TROUBLE CODE 11
—NO TROUBLE—
DIAGNOSIS:
ABS/TCS control module does not store troubles.
B4M0491
D: TROUBLE CODE 21
1. FR.SS OPEN
—Faulty front right ABS sensor (Open circuit)—
DIAGNOSIS:
Faulty ABS sensor
Faulty harness and connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS does not operate.
TCS does not operate.
1. Check resistance of ABS sensor.
OK
Not OK
Replace ABS sensor.
2. Check harness connector between ABS/TCS
control module and ABS sensor.
OK
Not OK
Repair harness/connector.
Replace ABS/TCS control module.
NOTE:
When checking ABS sensor, carefully bend or swing con-
nector and harness to check for improper contacts or open
circuits.
96
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Page 1778 of 2248
B4M0492
2. FR.SS SHORT
—Faulty front right ABS sensor (Short circuit)—
DIAGNOSIS:
Faulty ABS sensor
Faulty harness and connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
TCS does not operate.
1. Check resistance of ABS sensor.
OK
Not OK
Replace ABS sensor.
2. Check body short of ABS sensor.
OK
Not OK
Replace ABS sensor.
3. Check body short of harness.
OK
Not OK
Repair harness/connector.
Replace ABS/TCS control module.
NOTE:
When checking ABS sensor, carefully bend or swing con-
nector and harness to check for improper contacts or open
circuits.
97
4-4bBRAKES
10. Diagnostic Chart with Select Monitor
Page 1779 of 2248
B4M0493
E: TROUBLE CODE 22
1. FR.SS W.SPEED
—Irregular signals from front right ABS sensor—
DIAGNOSIS:
Faulty ABS sensor signal (noise, irregular signal, etc.)
Faulty harness/connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
1. Check ABS sensor mechanical trouble.
OK
Not OK
Repair ABS sensor/tone wheel.
2. Check ground circuit of ABS/TCS control
module.
OK
Not OK
Repair harness/connector.
3. Check resistance of ABS sensor.
OK
Not OK
Replace ABS sensor.
4. Check harness connector between ABS/TCS
control module and ABS sensor.
OK
Not OK
Repair harness/connector.
5. Check sources of signal noise.
OK
Not OK
Repair noise sources.
Replace ABS/TCS control module.
98
4-4bBRAKES
10. Diagnostic Chart with Select Monitor
Page 1780 of 2248
B4M0494
2. FR.SS OR MV
—Irregular signals from front right ABS sensor in
decompressing mode—
DIAGNOSIS:
Faulty ABS sensor signal (noise, irregular signal, etc.)
Faulty hydraulic unit
Faulty harness/connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS does not operate.
TCS does not operate.
1. Check ABS sensor mechanical trouble.
OK
Not OK
Repair ABS sensor/tone wheel.
2. Check ground circuit of ABS/TCS control
module.
OK
Not OK
Repair harness/connector.
3. Check sources of signal noise.
OK
Not OK
Repair noise sources.
4. Check operation of hydraulic unit.
OK
Not OK
Replace hydraulic unit.
Replace ABS/TCS control module.
99
4-4bBRAKES
10. Diagnostic Chart with Select Monitor
Page 1781 of 2248
B4M0495
3. FR.SS OVER
—Excessive speed of front right ABS sensor signal—
DIAGNOSIS:
Faulty ABS sensor signal (noise, irregular signal, etc.)
Faulty harness/connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
1. Check ABS sensor mechanical trouble.
OK
Not OK
Repair ABS sensor/tone wheel.
2. Check ground circuit of ABS/TCS control
module.
OK
Not OK
Repair harness/connector.
3. Check sources of signal noise.
OK
Not OK
Repair noise sources.
Replace ABS/TCS control module.
100
4-4bBRAKES
10. Diagnostic Chart with Select Monitor
Page 1782 of 2248
B4M0496
F: TROUBLE CODE 23
1. FL.SS OPEN
—Faulty front left ABS sensor (Open circuit)—
DIAGNOSIS:
Faulty ABS sensor
Faulty harness and connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
NOTE:
The procedures used are the same as those for FR.SS
OPEN.
B4M0497
2. FL.SS SHORT
—Faulty front left ABS sensor (Short circuit)—
DIAGNOSIS:
Faulty ABS sensor
Faulty harness and connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
NOTE:
The procedures used are the same as those for FR.SS
SHORT.
101
4-4bBRAKES
10. Diagnostic Chart with Select Monitor
Page 1783 of 2248

B4M0498
G: TROUBLE CODE 24
1. FL.SS W.SPEED
—Irregular signals from front left ABS sensor—
DIAGNOSIS:
Faulty ABS sensor signal (noise, irregular signal, etc.)
Faulty harness/connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
NOTE:
The procedures used are the same as those for FR.SS
W.SPEED.
B4M0499
2. FL.SS OR MV
—Irregular signals from front left ABS sensor in
decompressing mode—
DIAGNOSIS:
Faulty ABS sensor signal (noise, irregular signal, etc.)
Faulty hydraulic unit
Faulty harness/connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
NOTE:
The procedures used are the same as those for FR.SS OR
MV.
B4M0500
3. FL.SS OVER
—Excessive speed of front left ABS sensor signal—
DIAGNOSIS:
Faulty ABS sensor signal (noise, irregular signal, etc.)
Faulty harness/connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
NOTE:
The procedures used are the same as those for FR.SS
OVER.
102
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10. Diagnostic Chart with Select Monitor
Page 1784 of 2248
B4M0501
H: TROUBLE CODE 25
1. RR.SS OPEN
—Faulty rear right ABS sensor (Open circuit)—
DIAGNOSIS:
Faulty ABS sensor
Faulty harness and connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
NOTE:
The procedures used are the same as those for FR.SS
OPEN.
B4M0502
2. RR.SS SHORT
—Faulty rear right ABS sensor (Short circuit)—
DIAGNOSIS:
Faulty ABS sensor
Faulty harness and connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
NOTE:
The procedures used are the same as those for FR.SS
SHORT.
103
4-4bBRAKES
10. Diagnostic Chart with Select Monitor