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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1807 (Hydraulic Brake System) >> Diagnostic Information and Procedures >> DTC C1109 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: It is recommend that Component Testing is performed before Circuit Testing when diagnosing the power brake booster actuator.
  1. Ignition OFF, disconnect the harness connector from the hill hold solenoid.
  2. Test for less than 5.0 ohm of resistance between the harness connector terminals and ground.
    • If greater than 5.0 ohm, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the hill hold solenoid harness connector terminals. With a scan tool command the solenoid on and Off.
    • If the test lamp remains OFF during the commands, test for a short to ground or an open/high resistance on either control circuits. If the circuits test normal, test or replace the power fuse.
  4. If all circuits test normal, test or replace the hill hold solenoid valve.
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