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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System With Traction Control System - BOSCH 5.3 >> Diagnostic Tests >> DTC C0870: BPMV Pressure Sensor Reference Circuit Malfunction (Intrigue) >> Diagnosis

DTC C0870: BPMV Pressure Sensor Reference Circuit Malfunction (Intrigue): Diagnosis

  1. Perform DIAGNOSTIC SYSTEM CHECK  under DIAGNOSIS & TESTING. Go to next step.
  2. Turn ignition off. Disconnect EBCM. Install Universal Pinout Box (J 39700) with Cable Adapter (J 39700-530) between EBCM and EBCM connector. Turn ignition on, engine off. Using DVOM, measure voltage between universal pinout box terminals No. 17 (Orange wire) and No. 15 (Black/White wire). If voltage is 4.4-5.6 volts, see DIAGNOSTIC AIDS  . If voltage is not 4.4-5.6 volts, go to next step.
  3. Turn ignition off. Disconnect brake pressure sensor. Turn ignition on, engine off. Using DVOM, measure voltage between universal pinout box terminals No. 28 (Gray wire) and No. 15 (Black/White wire). If voltage is greater than 4.4 volts, go to next step. If voltage is not greater than 4.4 volts, go to step  5 .
  4. Using DVOM, measure voltage between universal pinout box terminals No. 28 (Gray wire) and No. 15 (Black/White wire). If voltage is less than 5.6 volts, go to step 8 . If voltage is not less than 5.6 volts, go to step  6 .
  5. Check Gray wire (5-volt reference circuit) between brake pressure sensor and EBCM for short to ground. If problem was found, repair as necessary. After repairs, go to step  12 . If problem was not found, go to step  9 .
  6. Check Gray wire (5-volt reference circuit) between brake pressure sensor and EBCM for short to voltage. If problem was found, repair as necessary. After repairs, go to step  12 . If problem was not found, go to next step.
  7. Check Gray/Black wire (ground circuit) between brake pressure sensor and EBCM for high resistance or open. If problem was found, repair as necessary. After repairs, go to step  12 . If problem was not found, go to step  9 .
  8. Check brake pressure sensor connector for poor connections. If problem was found, repair as necessary. After repairs, go to step  12 . If problem was not found, go to step  10 .
  9. Check connector of EBCM for poor connections. If problem was found, repair as necessary. After repairs, go to step  12 . If problem was not found, go to step  11 .
  10. Replace brake pressure sensor. See BRAKE PRESSURE SENSOR (INTRIGUE)  under REMOVAL & INSTALLATION. After repairs, go to step  12 .
  11. Replace EBCM. See ELECTRONIC BRAKE CONTROL MODULE  under REMOVAL & INSTALLATION. After repairs, go to next step.
  12. Using scan tool, clear DTCs. Operate vehicle. If DTC does not reset, system is okay.
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