Diagnostic Procedure

DTC C1128:4A (ELECTRIC PARKING BRAKE) DIAGNOSTIC PROCEDURE

Step	Inspection		Action
1	INSPECT ELECTRIC PARKING BRAKE SWITCH CONNECTOR CONDITION Switch the ignition OFF. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Disconnect the electric parking brake switch connector. (See ELECTRIC PARKING BRAKE SWITCH REMOVAL/INSTALLATION .) 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.
1		No	Repair or replace the connector, then go to Step 4.
2	INSPECT ELECTRIC PARKING BRAKE SWITCH Inspect the electric parking brake switch. (See ELECTRIC PARKING BRAKE SWITCH INSPECTION .) Is the electric parking brake switch normal?	Yes	Go to the next step.
2		No	Replace the electric parking brake switch, then go to Step 4. (See ELECTRIC PARKING BRAKE SWITCH REMOVAL/INSTALLATION .)
3	INSPECT ELECTRIC PARKING BRAKE CONTROL MODULE CONNECTOR CONDITION Disconnect the electric parking brake control module connector. (See ELECTRIC PARKING BRAKE CONTROL MODULE REMOVAL/INSTALLATION .) 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.
3		No	Repair or replace the connector, then go to Step 4.
4	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. If the malfunction recurs, replace the electric parking brake control module. (See ELECTRIC PARKING BRAKE CONTROL MODULE REMOVAL/INSTALLATION .) Go to the next step.
4		No	Go to the next step.
5	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] .)
5		No	DTC troubleshooting completed.