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Pinpoint Test K: DTC C1799: EPB Hall Effect Failure

WARNING: This page is about a different car, the 2004 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.
  1. K1 CHECK THE HALL-EFFECT CIRCUITS FOR A SHORT TO POWER 
    • Disconnect: EPB Module C4205b.
    • Disconnect: EPB Actuator C4206.
    • Measure the voltage between the EPB actuator C4206 circuits harness side and ground as follows:
      CIRCUIT PIN AND FUNCTION

      Circuit Pin Function
      7-CG20 (YE/VT) 3 Hall-effect Power
      8-CG20 (WH/VT) 4 Hall-effect Signal
      9-CG20 (BN/WH) 5 Hall-effect Ground
    • Is any voltage present? 
      1. Yes  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test. RESET the EPB system. REFER to ELECTRONIC PARKING BRAKE (EPB) RESETTING .
      2. No  : GO to K2.
  2. K2 CHECK THE HALL-EFFECT CIRCUITS FOR A SHORT TO GROUND 
    • Disconnect the battery.
    • Measure the resistance between the EPB actuator C4206 circuits harness side and ground as follows:
      CIRCUIT PIN AND FUNCTION

      Circuit Pin Function
      7-CG20 (YE/VT) 3 Hall-effect Power
      8-CG20 (WH/VT) 4 Hall-effect Signal
    • Is the resistance greater than 10,000 ohms? 
      1. Yes  : GO to K3.
      2. No  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test. RESET the EPB system. REFER to ELECTRONIC PARKING BRAKE (EPB) RESETTING .
  3. K3 CHECK THE HALL-EFFECT CIRCUITS FOR AN OPEN 
    • Measure the resistance between the EPB actuator C4206 circuits, harness side and the EPB module C4205b circuits, harness side as follows:
      EPB ACTUATOR C4206 EPB MODULE C4205B PINS

      Circuit EPB Actuator Pin EPB Module Pin
      7-CG20 (YE/VT) 3 10
      8-CG20 (WH/VT) 4 4
      9-CG20 (BN/WH) 5 12
    • Is the resistance less than 5 ohms? 
      1. Yes  : GO to K4.
      2. No  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test. RESET the EPB system. REFER to ELECTRONIC PARKING BRAKE (EPB) RESETTING .
  4. K4 CHECK THE HALL-EFFECT CIRCUITS FOR A SHORT TO POWER 
    • Connect: EPB Actuator C4206.
      CIRCUIT PIN AND FUNCTION

      Circuit Pin Function
      7-CG20 (YE/VT) 3 Hall-effect Power
      8-CG20 (WH/VT) 4 Hall-effect Signal
      9-CG20 (BN/WH) 5 Hall-effect Ground
    • Is any voltage present? 
      1. Yes  : INSTALL a new EPB actuator. REFER to PARKING BRAKE . CLEAR the DTCs. REPEAT the self-test. RESET the EPB module.
      2. No  : GO to K5.
  5. K5 CHECK THE HALL-EFFECT CIRCUITS FOR A SHORT TO GROUND 
    • Disconnect the battery.
    • Measure the resistance between the EPB actuator C4206 circuits, harness side and ground as follows:
      CIRCUIT PIN AND FUNCTION

      Circuit Pin Function
      7-CG20 (YE/VT) 3 Hall-effect Power
      8-CG20 (WH/VT) 4 Hall-effect Signal
    • Is the resistance greater than 10,000 ohms? 
      1. Yes  : GO to K6.
      2. No  : INSTALL a new EPB actuator. REFER to PARKING BRAKE . CLEAR the DTCs. REPEAT the self-test. RESET the EPB module.
  6. K6 CHECK THE HALL-EFFECT CIRCUITS FOR AN OPEN 
    • Measure the resistance between the EPB actuator C4206 circuits, harness side and the EPB module C4205b circuits, harness side as follows:
      EPB ACTUATOR C4206 EPB MODULE C4205B PINS

      Circuit EPB Actuator Pin EPB Module Pin
      7-CG20 (YE/VT) 3 10
      8-CG20 (WH/VT) 4 4
      9-CG20 (BN/WH) 5 12
    • Is the resistance less than 5 ohms? 
      1. Yes  : INSTALL a new EPB actuator. REFER to PARKING BRAKE . REPEAT the self-test.
      2. No  : INSTALL a new EPB actuator. REFER to PARKING BRAKE . CLEAR the DTCs. REPEAT the self-test. RESET the EPB module.
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