Toyota Hilux Surf 1993 Owner's Manual page 715

BR–82
Is there foreign material or ferric chips
on the speed sensor tip ?
Disconnect connector from ECU and
inspect continuity between speed
sensor terminals on wire harness side.
Does any abnormal change occur in
continuity when the connector or wire
harness of speed sensor and intermedi–
ate connectors are twisted or bent ?
Inspect actuator operation.
(See page BR–88)
Is actuator operation OK ?
Inspect differential ring gear serrations.
Are serrations OK ?
Faulty ECU.
BRAKE SYSTEM
Continued from page
YES
YES
(Ab–
normal
change)
NO
(No change)
YES
YES
– Rear–Wheel Anti–Lock Brake System
BR–81
Clean chips from speed sensor.
Faulty wire harness.
Faulty actuator.
Faulty sensor rotor.
(Differential ring gear)