ABS: 4E-66
DTC “55” (C1655): ABS Control Unit Malfunction
B817H24504023
Troubleshooting
Possible Cause
Faulty ABS control unit
Step Action Yes No
1 1) Inspect the clearances of the front and rear wheel speed
sensor – sensor rotor using the thickness gauge.
Special tool
(A): 09900–20803 (Thickness gauge)
(B): 09900–20806 (Thickness gauge)
Wheel speed sensor – sensor rotor clearance
0.3 – 1.5 mm (0.012 – 0.059 in)
Front
Rear
Are the clearances OK?
Go to Step 2. Adjust the clearance.
2 1) Inspect both of the wheel speed sensor rotors for
damage and check that no foreign objects are caught in
the rotor openings.
Are the rotors OK?
Go to Step 3. Clean or replace the
rotor.
(A), (B)
I717H2450009-01
(A), (B)
I717H2450011-01
I718H1450064-01
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