Solenoids; Pressure Switch Replacement; Leak Test - Honda Prelude 1993 Service Manual

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35 N.m 13.5 kg-m, 25 lb-ft)

NOTE: lf a sol€noid leaks excessively, the brake fluid

level in the modulator reservoir tank will rise when

operating the ABS pump motor. The modulator reser-

voir may also overtlow.

1. Disconn€ct the pump motor and ptessure switch

2. Connsct an ohmmeter between the YEL and YEL

terminals of the pressur€ switch connector.

3. Attach the positive (+) lead oJ a fully charged 12 V

battery to the RED/WHT terminal ot the motor con-

nector and negative (-) lead to the GRN t€rminal,

and install a switch between negative lead 8nd

GRN terminal as shown.

Turn the switch on to allow sutficient gr€ssure to

build uo within the accumulator and check for con-

tinuity. lf ths ohmmete. shows continuity (pressure

switch turned on), run the motor for 1O seconds

mors, then turn the switch off

a Check iJ the solenoid hisses or squeaks. Replsce

the modulator if the solenoid hisses or squeaks.

a Check the pressure switch for continuity within

30 minutes, lt is normal if there is continuity' ll

there is no continuitv, a solenoid is taulty or

high-pressure line leaks.

Pressure Switch Replacement

Secure the pump assembly in a vise.

R€move the banjo bolt, then remove the pressure

switch from the pump housing

lnstallation

lnstall the pressure switch with the banjo bolt and

sealing washers, then tighten the bolt.

Troubleshooting