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Home >> Cadillac >> 2008 >> STS Base, 4.6 A, AWD >> Repair and Diagnosis >> Brakes >> Anti-Lock Brake System, Traction Control System & Stability Control System >> Diagnostic Information and Procedures >> DTC C0136 >> Circuit/System Testing
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Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the brake fluid pressure sensor.
  2. Test for less than 2.0 ohms of resistance between the low reference circuit terminal 1 and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the EBCM.
  3. Ignition ON, test for 4.8-5.2 volts between the 5 volt reference circuit terminal 3 and ground.
    • If less than the specified range, test the 5 volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.
    • If greater than the specified range, test the 5 volt reference circuit for a short to voltage. If the circuit tests normal, replace the EBCM.
  4. Verify the scan tool Brake Pressure Sensor Input, in VSES Data, is less than 0.2 volts.
    • If greater than the specified range, test the signal circuit terminal 2 for a short to voltage. If the circuit tests normal, replace the EBCM.
  5. Install a 3 A fused jumper wire between the signal circuit terminal 2 and the 5 volt reference circuit terminal 3. Verify the scan tool Brake Pressure Sensor Input is greater than 4.7 volts.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.
  6. If all circuits test normal, test or replace the brake fluid pressure sensor.
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