TOYOTA PREVIA 91-97 REPAIR MANUAL

(Tam Dominh) #1
BRAKES 9-39

Fig. 142 Connect the positive lead of the ohmmeter to terminal
5 and the negative to lead 4 of the solenoid relay—1994-97
models

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O










o

0

A

6 T




Fig. 143 Inspect the solenoid relay operation while applying
battery voltage—1994-97 models


  1. Connect a jumper wire from the positive battery terminal to terminal

  2. Connect a jumper wire from the negative battery terminal to terminal 3 of
    the relay.

  3. Using an ohm meter, check for continuity between terminals 1 and
    2 of the relay. Replace the relay if the test results indicate no continuity.

  4. To inspect the solenoid relay circuit, with the relay off of the actua-
    tor, check for continuity between terminals 1 and 6.

  5. Check that there is no continuity between terminals 2 and 5.

  6. Check that there is continuity between terminals 3 and 5.

  7. Connect the positive lead of an ohmmeter to terminal 5 and the neg-
    ative lead to terminal 4 of the relay. There should be continuity. Reverse the
    leads of the ohm meter and observe the readings. There should be no con-
    tinuity.

  8. If continuity readings differ from specified results, replace the relay.


REMOVAL & INSTALLATION


The control relays are located in the actuator. There is a plastic case sur-
rounding them, remove this case and unplug the relays.


Speed Sensors


TESTING

I See Figures 144,145 and 146


  1. Inspect the sensor. Disconnect the speed sensor wiring.

  2. Measure the resistance between terminals. Standard resistance
    is:



  • Front—0.6-1.8 kilometers

  • 1.05-1.45 kilometers



  1. If the resistance value is not within specifications, replace the speed
    sensor.

  2. Check that there is no continuity between each terminal and the sen-
    sor body.

  3. If there is continuity, replace the sensor.

  4. Connect the speed sensor wiring.


LH Sensor RH Sensor


FL- FR+ FR-
90919G02

Fig. 144 Front speed sensor connector terminal locations

LH Sensor RH Sensor


RL+ RL- RR+ RR-
90919G03

Fig. 145 Rear speed sensor connector terminal locations
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