DTC C2006:74 [ELECTRIC PARKING BRAKE]

id040257253000

Description

Electric parking brake motor gear unit (LH) power transmission impossible (spin)
Detection condition
•  Electric parking brake control module detects an electric parking brake motor gear unit (LH) power transmission impossible (spin).
Fail-safe
Not applicable
Possible cause
•  Electric parking brake motor gear unit (LH) connector or terminal malfunction
•  Electric parking brake control module connector or terminal malfunction
•  Open circuit in wiring harness 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
•  Electric parking brake motor gear unit (LH) malfunction
•  Electric parking brake control module malfunction

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY OTHER ELECTRIC PARKING BRAKE CONTROL MODULE DTCs
•  Clear the DTC for the electric parking brake control module using the M-MDS.
•  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.
•  Are any DTCs other than DTC C2006:74 displayed?
Yes
If a procedure which verifies other DTCs is included in the diagnostic procedure of the displayed DTC:
•  Go to the next step.
If a procedure which verifies other DTCs is not included in the diagnostic procedure of the displayed DTC:
•  Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
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.
•  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 6.
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 6.
4
INSPECT ELECTRIC PARKING BRAKE MOTOR GEAR UNIT (LH) CIRCUIT FOR OPEN CIRCUIT
•  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):
?  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
•  Is there continuity?
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 an open circuit.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has an open circuit.
Go to Step 6.
5
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.
•  Clear the DTC for the electric parking brake control module using the M-MDS.
•  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.
•  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 7.
6
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Always reconnect all disconnected connectors.
•  Connect the negative battery terminal.
•  Clear the DTC for the electric parking brake control module using the M-MDS.
•  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.
•  Is the same DTC displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the electric parking brake control module.
Go to the next step.
No
Go to the next step.
7
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.