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Home >> Hummer >> 2008 >> H3 Base, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 37 (Anti-Lock Brake System, Traction Control System & Stability Control System) >> Diagnostic Information and Procedures >> DTC C0244 or P1689 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2008 Isuzu i-370, 2008 Isuzu i-290, 2008 GMC Canyon, and 2008 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Use a scan tool in order to clear the DTCs. Cycle the ignition to OFF and then start the engine. A current failure will set a DTC.
    • If the DTC does not reset, go to Diagnostic Aids.
  2. Turn OFF the ignition and disconnect the PCM harness connector. At the PCM harness connector, use a DMM to measure for 12 volts on the delivered torque circuit. Turn ON the ignition.
    • If the voltage is below 10 volts, test for an open or short to ground on the requested torque circuit or replace the EBCM/brake pressure modulator valve (BPMV) assembly.
  3. Connect one end of a test lamp to ground. With the DMM still connected to the PCM harness connector, touch the other end of the test lamp to the DMM lead connected to the PCM harness connector. The DMM voltage reading should drop below 0.5 volts.
    • If the voltage does not drop to below 0.5 volts, check for a short to voltage on the requested torque circuit. If a short to voltage cannot be found, replace the EBCM/brake pressure modulator valve (BPMV) assembly.
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