4E-51 ABS:
6 1) Check for continuity between “3” (W/R) on the ABS
control unit coupler and “D” (W/R) on the front wheel
speed sensor coupler.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
(B): 09900–25009 (Needle pointed probe set)
Tester knob indication
Continuity test ( )
Normal value (“3” – “D”)
Continuity ( )
Is there continuity between “3” and “D”?
Go to Step 7. Inspect the wire
harness. (Faulty W/R
wire)
7 1) Connect the front wheel speed sensor coupler.
2) Connect three 1.5 V dry cells “a” in series as shown and
make sure that their total voltage is more than 4.5 V.
Measure the current between (+) dry cell terminal and
“12” (B/R) on the ABS control unit coupler.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
(B): 09900–25009 (Needle pointed probe set)
Tester knob indication
Current ( , 20 mA)
Normal value
3 – 14 mA
Is the current OK?
Replace the ABS
control unit/HU.
Faulty front wheel
speed sensor
Step Action Yes No
12
ABS control unit coupler (Harness end)
Harness side
“D”
18
10
13
24
16
89
24
25
21
3
(A)
(B)
I718H1450083-04
12
DCmA
ABS control unit coupler (Harness end)
“a”
18
10
13
24
16
89
24
25
21
3
(A)
(B)
I718H1450084-03
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