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Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis >> Brakes >> Parking Brake System >> On-Board Diagnostic - Electric Parking Brake >> DTC C2006-19; Electric Parking Brake Motor Gear Unit (LH) Circuit Malfunction >> Diagnostic Procedure

Diagnostic Procedure

DTC C2006-19; ELECTRIC PARKING BRAKE MOTOR GEAR UNIT (LH) CIRCUIT MALFUNCTION - DIAGNOSTIC PROCEDURE

Step Inspection Action
1 VERIFY OTHER ELECTRIC PARKING BRAKE CONTROL MODULE DTCs Yes Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [ELECTRIC PARKING BRAKE] .)
No Go to the next step.
2 INSPECT ELECTRIC PARKING BRAKE MOTOR GEAR UNIT (LH) CONNECTOR CONDITION
  • Switch the ignition off.
  • Disconnect the negative battery terminal.

    (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)

  • Disconnect the electric parking brake motor gear unit (LH) connector.
  • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
  • Is the connector normal?
 Yes Go to the next step.
No Repair or replace the connector, then go to Step 8.
3 INSPECT ELECTRIC PARKING BRAKE CONTROL MODULE CONNECTOR CONDITION
  • Disconnect the electric parking brake control module connector.
  • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
  • Is the connector normal?
 Yes Go to the next step.
No Repair or replace the connector, then go to Step 8.
4 INSPECT ELECTRIC PARKING BRAKE MOTOR GEAR UNIT (LH) CIRCUIT FOR SHORT TO GROUND
  • Verify that the electric parking brake motor gear unit (LH) and electric parking brake control module connectors are disconnected.
  • Inspect for continuity between the following terminals (wiring harness-side) and body ground:
    • Electric parking brake motor gear unit (LH) terminal A
    • Electric parking brake motor gear unit (LH) terminal B
  • Is there continuity?
 Yes Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
  • Electric parking brake motor gear unit (LH) terminal A-Electric parking brake control module terminal 1U
  • Electric parking brake motor gear unit (LH) terminal B-Electric parking brake control module terminal 1Z

    If there is a common connector:

  • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
  • Repair or replace the malfunctioning part.

    If there is no common connector:

  • Repair or replace the wiring harness which has a short to ground.

Go to Step 8.
No Go to the next step.
5 INSPECT ELECTRIC PARKING BRAKE MOTOR GEAR UNIT (LH) CIRCUIT FOR SHORT TO POWER SUPPLY
  • Verify that the electric parking brake motor gear unit (LH) and electric parking brake control module connectors are disconnected.
  • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  • Switch the ignition ON (engine off or on).
  • Measure the voltage at the following terminals (wiring harness-side):
    • Electric parking brake motor gear unit (LH) terminal A
    • Electric parking brake motor gear unit (LH) terminal B
  • Is the voltage 0 V?
 Yes Go to the next step.
No Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
  • Electric parking brake motor gear unit (LH) terminal A-Electric parking brake control module terminal 1U
  • Electric parking brake motor gear unit (LH) terminal B-Electric parking brake control module terminal 1Z

    If there is a common connector:

  • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.
  • Repair or replace the malfunctioning part.

    If there is no common connector:

  • Repair or replace the wiring harness which has a short to power supply.

Go to Step 8.
6 INSPECT ELECTRIC PARKING BRAKE MOTOR GEAR UNIT (LH) CIRCUITS FOR SHORT CIRCUIT
  • Switch the ignition off.
  • Disconnect the negative battery terminal.

    (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)

  • Verify that the electric parking brake motor gear unit (LH) and electric parking brake control module connectors are disconnected.
  • Inspect for continuity between electric parking brake motor gear unit (LH) terminals A and B (wiring harness-side).
  • Is there continuity?
 Yes Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
  • Electric parking brake motor gear unit (LH) terminal A-Electric parking brake control module terminal 1U
  • Electric parking brake motor gear unit (LH) terminal B-Electric parking brake control module terminal 1Z

    If there is a common connector:

  • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to each other.
  • Repair or replace the malfunctioning part.

    If there is no common connector:

  • Repair or replace the wiring harness which has a short to each other.

Go to Step 8.
No Go to the next step.
7 VERIFY IF MALFUNCTIONING LOCATION IS ELECTRIC PARKING BRAKE MOTOR GEAR UNIT (LH) DEPENDING ON REPEATABILITY
  • Always reconnect all disconnected connectors.
  • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  • Clear the DTC for the electric parking brake control module using the M-MDS.

    (See CLEARING DTC [ELECTRIC PARKING BRAKE] .)

  • Perform the following procedure 3 times or more.
    • Pull up the electric parking brake switch to operate the electric parking brake.
    • Press down the electric parking brake switch to release the electric parking brake.
  • Retrieve the electric parking brake control module DTCs using the M-MDS. (See DTC INSPECTION [ELECTRIC PARKING BRAKE] .)
  • Is the same DTC displayed?
 Yes Replace the electric parking brake motor gear unit (LH), then go to the next step.
(See ELECTRIC PARKING BRAKE MOTOR GEAR UNIT REMOVAL/INSTALLATION .)
No Go to Step 9.
8 VERIFY THAT REPAIRS HAVE BEEN COMPLETED
  • Always reconnect all disconnected connectors.
  • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  • Clear the DTC for the electric parking brake control module using the M-MDS.

    (See CLEARING DTC [ELECTRIC PARKING BRAKE] .)

  • Perform the following procedure 3 times or more.
    • Pull up the electric parking brake switch to operate the electric parking brake.
    • Press down the electric parking brake switch to release the electric parking brake.
  • Retrieve the electric parking brake control module DTCs using the M-MDS. (See DTC INSPECTION [ELECTRIC PARKING BRAKE] .)
  • Is the same DTC displayed?
 Yes Repeat the inspection from Step 1.
Go to the next step.
No Go to the next step.
9 VERIFY IF OTHER DTCs DISPLAYED
  • Are any other DTCs displayed?
 Yes Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [ELECTRIC PARKING BRAKE] .)
No DTC troubleshooting completed.
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