Page 1649 of 2248

D: TROUBLE CODE 22, 24, 26 AND 28
—FAULTY A.B.S. SENSOR
(WHEN THERE IS NO OPEN CIRCUIT OR
SPEED SIGNAL INPUT.)—
DIAGNOSIS:
Faulty A.B.S. sensor/harness
Faulty tone wheel
Faulty A.B.S. control module
TROUBLE SYMPTOM:
A.B.S. does not operate.
NOTE:
The A.B.S. control module will sense that the A.B.S. sen-
sor circuit is“open”due to increased resistance but this
trouble code will appear when the speed signal is not
present or when it suddenly disappears while driving.
1. Check input signal of A.B.S. sensor to
A.B.S. control module side.
Not OK
OK
Check contact of A.B.S. control module connector
terminal.
Not OK OK
Repair A.B.S. control module connector.
Replace A.B.S. control module.
2. Check resistance of A.B.S. sensor.
Not OK
OK
Repair harness/connector.
3. Check A.B.S. sensor mechanical trouble.
Not OK
OK
Replace A.B.S. sensor.
Repair mechanical trouble.
NOTE:
When checking A.B.S. sensor, carefully bend or swing con-
nector and harness to check for improper contact or open
circuits.
22
4-4aBRAKES
7. Diagnostics Chart with Trouble Code
Page 1650 of 2248
B4M0583
23
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7. Diagnostics Chart with Trouble Code
Page 1651 of 2248

B4M0711A
1. CHECK INPUT SIGNAL OF A.B.S. SENSOR TO
A.B.S. CONTROL MODULE SIDE.
1) Raise all four wheels of ground.
2) Turn ignition switch OFF.
3) Disconnect connector from A.B.S. control module.
4) Disconnect connector cover from connector.
4-4a [T7C2].>
5) Connect connector to A.B.S. control module.
6) Connect the oscilloscope to the A.B.S. control module
connector in accordance with the trouble code.
7) Turn ignition switch ON.
8) Rotate wheels and measure voltage at specified fre-
quency.
NOTE:
When this inspection is completed, the A.B.S. control mod-
ule sometimes memorizes the trouble code 29.
TROUBLE CODE / Connector & terminal:
22 / (P3) No. 23 (+)—No. 21 ( )
24 / (P3) No. 22 (+)—No.4( )
26 / (P3) No. 24 (+)—No. 26 ( )
28 / (P3) No. 8 (+)—No.9( )
Specified voltage: 0.12—1 V (When it is 20 Hz.)
B4M0248B
2. CHECK RESISTANCE OF A.B.S. SENSOR.
1) Turn ignition switch OFF.
2) Disconnect connector from A.B.S. sensor.
3) Measure resistance between A.B.S. sensor connector
terminals.
TROUBLE CODE / Connector & terminal:
22 / (B6) No. 1—No. 2
24 / (B15) No. 1—No. 2
26 / (P8) No. 1—No. 2
28 / (P9) No. 1—No. 2
Specified resistance: 0.8—1.2 kΩ
24
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7. Diagnostics Chart with Trouble Code
Page 1652 of 2248
G4M0700
G4M0701
3. CHECK A.B.S. SENSOR MECHANICAL TROUBLE.
1) Dismount brake as outlined in manual to gain access to
A.B.S. sensor and tone wheel for inspection.
2) Check pole piece and tone wheel for accumulation of
foreign particles. If necessary, remove foreign particles and
clean.
3) Check tone wheel teeth for cracks for deformities. If
necessary, replace tone wheel (No. of teeth: 44) with a new
one.
4) Check tone wheel for looseness.
Tightening torque:
10—16 N⋅m (1.0—1.6 kg-m, 7—12 ft-lb)
5) Measure tone wheel-to-pole piece gap over entire
perimeter of the wheel.
SpecificationsFront wheel Rear wheel
0.9—1.4 mm
(0.035—0.055 in)0.7—1.2 mm
(0.028—0.047 in)
If measurements check out“Not OK”, adjust the gap using
spacers (Part No. 26755AA000). If spacers cannot correct
the gap, replace worn sensor or worn tone wheel.
6) Check hub runout.
Specifications 0.05 mm (0.0020 in)
25
4-4aBRAKES
7. Diagnostics Chart with Trouble Code
Page 1653 of 2248

E: TROUBLE CODE 29
—FAULTY TONE WHEEL, ETC.—
DIAGNOSIS:
Faulty tone wheel
Faulty A.B.S. control module
TROUBLE SYMPTOM:
A.B.S. does not operate.
NOTE:
When the wheels turn freely for a long time, such as when
the vehicle is towed or jacked-up, or when steering wheel
is continuously turned all the way, this trouble code may
sometimes occur.
Check tire specifications, tire wear and air
pressure.
OK
Not OK
Replace tire.
1. Check input signal of A.B.S. sensor to
A.B.S. control module side.
Not OK
OK
Check contact of A.B.S. control module connector
terminal.
Not OK OK
Repair A.B.S. control module connector.
Replace A.B.S. control module.
2. Check resistance of A.B.S. sensor.
Not OK
OK
Repair harness/connector.
3. Check A.B.S. sensor mechanical trouble.
Not OK
OK
Replace A.B.S. sensor.
Repair mechanical trouble.
NOTE:
When checking A.B.S. sensor, carefully bend or swing con-
nector and harness to check for improper contact or open
circuits.
26
4-4aBRAKES
7. Diagnostics Chart with Trouble Code
Page 1654 of 2248
B4M0583
27
4-4aBRAKES
7. Diagnostics Chart with Trouble Code
Page 1655 of 2248

B4M0711A
1. CHECK INPUT SIGNAL OF A.B.S. SENSOR TO
A.B.S. CONTROL MODULE SIDE.
1) Raise all four wheels of ground.
2) Turn ignition switch OFF.
3) Disconnect connector from A.B.S. control module.
4) Disconnect connector cover from connector.
4-4a [T7C2].>
5) Connect connector to A.B.S. control module.
6) Connect the oscilloscope to the A.B.S. control module
connector in accordance with the trouble code.
7) Turn ignition switch ON.
8) Rotate wheels and measure voltage at specified fre-
quency.
NOTE:
When this inspection is completed, the A.B.S. control mod-
ule sometimes memorizes the trouble code 29.
Connector & terminal:
(P3) No. 23 (+)—No. 21 ( )
(P3) No. 22 (+)—No.4( )
(P3) No. 24 (+)—No. 26 ( )
(P3) No. 8 (+)—No.9( )
Specified voltage: 0.12—1 V (When it is 20 Hz.)
B4M0248B
2. CHECK RESISTANCE OF A.B.S. SENSOR.
1) Turn ignition switch OFF.
2) Disconnect connector from A.B.S. sensor.
3) Measure resistance between A.B.S. sensor connector
terminals.
Connector & terminal:
(B6) No. 1—No. 2
(B15) No. 1—No. 2
(P8) No. 1—No. 2
(P9) No. 1—No. 2
Specified resistance: 0.8—1.2 kΩ
28
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7. Diagnostics Chart with Trouble Code
Page 1656 of 2248
G4M0700
G4M0701
3. CHECK A.B.S. SENSOR MECHANICAL TROUBLE.
1) Dismount brake as outlined in manual to gain access to
A.B.S. sensor and tone wheel for inspection.
2) Check pole piece and tone wheel for accumulation of
foreign particles. If necessary, remove foreign particles and
clean.
3) Check tone wheel teeth for cracks for deformities. If
necessary, replace tone wheel (No. of teeth: 44) with a new
one.
4) Check tone wheel for looseness.
Tightening torque:
10—16 N⋅m (1.0—1.6 kg-m, 7—12 ft-lb)
5) Measure tone wheel-to-pole piece gap over entire
perimeter of the wheel.
SpecificationsFront wheel Rear wheel
0.9—1.4 mm
(0.035—0.055 in)0.7—1.2 mm
(0.028—0.047 in)
If measurements check out“Not OK”, adjust the gap using
spacers (Part No. 26755AA000). If spacers cannot correct
the gap, replace worn sensor or worn tone wheel.
6) Check hub runout.
Specifications 0.05 mm (0.0020 in)
29
4-4aBRAKES
7. Diagnostics Chart with Trouble Code