Mitsubishi 3000GT Service Manual page 901

MB991 356
Body harness
When turned manually .-..i.--[...l--.L---
L---~---t---*--
I
SERVICE BRAKES - On-vehicle Service
5. Replace shoe and lining assembly or brake disc if very
irregular contact area is observed.
NOTE
Clean off chalk after check.
WHEEL SPEED SENSOR OUTPUT VOLTAGE
MEASUREMENT
tor
1. Lift up the vehicle and release the parking brake.
2. Disconnect the ECU harness connector and measure
with the adapter harness (MB991356) connected to the
harness side connector.
Caution
1. Never insert a probe, etc. into the connector as
2. Do not connect the connector (Special Tool)
3. Manually turning the wheel to be measured by l/2 to
1 turn/second, measure the output voltage with a circuit
tester or oscilloscope.
Output voltage:
Probable causes of low output voltage
I
,
,
l
Faulty speed sensor
l
4. Then, in order to observe the output state of the wheel
speed sensors, shift into low gear (AWD vehicle) and
drive the wheels, observe the output voltage waveform
of each wheel speed sensor with an oscilloscope.
In the case of the FWD vehicle, observe the waveform
with an oscilloscope; for the front wheels, shift into low
gear and drive the wheels; for the rear wheels, turn the
wheels manually at a constant speed.
NOTE
1.
2. The output voltage is low when the wheel speed is
TSB Revision
it may result in poor contact later.
marked with "*I' except when recording the wave-
form on a driving test. In such a case, connect
the connector to the ECU.
Terminal (same for
No.
When measured with circuit tester: 70 mV or more
When measured with oscilloscope (max. voltage):
100 mV or more
Speed sensor pole piece-to-rotor clearance too large
Waveform may also be observed by actually driving
the vehicle.
low and similarly it will be higher as the wheel speed
increases.
and
AWD FWD)