SERVICE BRAKES
Service Adjustment Procedures
The probable cause if the output voltage is 50
or lower, or if the one-side deflection width of the
oscilloscope’s waveform is 70
or lower
Probable causes
Remedy
Excessive clearance between the speed sensor pole
piece and rotor
Adjust to the standard value.
Foreign material attached to the speed sensor pole
piece
Remove the foreign material.
Damaged speed sensor pole piece
Replace the speed sensor.
Damaged rotor teeth
Replace the rotor.
Loose speed sensor or rotor installation bolt
I
to the specified torque.
NOTE
The speed sensor internal resistance and harness side are normal.
Caution
It is conceivable, because the movement of a speed-sensor cable “follows” the movement of the front
or rear suspension, that the damaged wiring condition may be apparent only during travel on poor
road surfaces, and may be normal on better road surfaces. Therefore, when measuring the output
voltage of a speed sensor, recheck the condition of the cable connections by removing the clamp and
pulling the cable and bending it near the clamp position in order to check for the existence of damaged
wiring.
2
5
Check connector
ECU
Body harness
356
MEASUREMENT OF WHEEL SPEED SENSOR
OUTPUT VOLTAGE <From 1991 models>
1. Lift up the vehicle and release the parking brake.
2. Disconnect the ECU harness connector and measure with
the adapter harness
356) connected to the harness
side connector.
Caution
1. Never insert a probe, etc. into the connector as it
may result in poor contact later.
2. Do not connect the connector (Special Tool) marked
with
except when recording the waveform on a
driving test. In such a case, connect the connector
to the ECU.
Terminal No. (same for AWD and
FL
RR
FR
RL
4
24
21
8
5
26
23 . 9
TSB Revision
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