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Hydraulic Modulator

  1. Turn ignition off. Disconnect ECU connector. See Figure and Figure . Connect DVOM between ECU connector terminals No. 32 and No. 2 to check left front control solenoid. Connect DVOM between ECU connector terminals No. 18 (rear control solenoid) and No. 35 (right front control solenoid). Resistance should be .7-1.7 ohms.
  2. If resistance is not within specification, unplug hydraulic modulator connector. Test resistance between hydraulic modulator terminal No. 4 (ground) and hydraulic modulator terminals No. 1, No. 3 and No. 5. If readings are now within specification, repair ECU wiring harness to modulator. If readings are still not within specification, replace hydraulic modulator. See HYDRAULIC MODULATOR R & I  under REMOVAL & INSTALLATION.
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