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1
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VERIFY ALL SYSTEM DTCs
• Switch the ignition OFF.
• Switch the ignition ON (engine off or on) and wait for 10 s or more.
• Perform a CMDTC self-test using the M-MDS.
• Are any DTCs other than DTC U300A:62 displayed?
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Yes
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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.
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No
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Go to the next step.
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2
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INSPECT ELECTRIC PARKING BRAKE CONTROL MODULE CONNECTOR CONDITION
• Switch the ignition OFF.
• Disconnect the negative battery terminal.
• 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?
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Yes
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Go to the next step.
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No
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Repair or replace the connector, then go to Step 4.
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3
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VERIFY ELECTRIC PARKING BRAKE CONTROL MODULE POWER SUPPLY (IG1) VOLTAGE
• Connect the negative battery terminal.
• Switch the ignition ON (engine off or on).
• Measure the voltage at the electric parking brake control module terminal 1AB (wiring harness-side).
• Is the voltage B+?
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Yes
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Go to the next step.
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No
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Inspect the C/U IG1 15 A fuse.
• If the fuse is blown:
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? Refer to the wiring diagram and verify whether or not there is a common connector between IG1 relay terminal C and electric parking brake control module terminal 1AB.
If there is a common connector:
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• 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:
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• Repair or replace the wiring harness which has a short to ground.
• Replace the fuse.
• If the fuse is damaged:
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? Replace the fuse.
• If the fuse is normal:
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? Refer to the wiring diagram and verify whether or not there is a common connector between IG1 relay terminal C and electric parking brake control module terminal 1AB.
If there is a common connector:
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• 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:
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• Repair or replace the wiring harness which has an open circuit.
Go to the next step.
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4
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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.
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? 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?
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Yes
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Repeat the inspection from Step 1.
• If the malfunction recurs, replace the electric parking brake control module.
Go to the next step.
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No
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Go to the next step.
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5
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VERIFY IF OTHER DTCs DISPLAYED
• Are any other DTCs displayed?
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Yes
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Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
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No
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DTC troubleshooting completed.
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