Diagnostic Procedure

Step	Inspection		Action
1	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. (See DTC INSPECTION [ELECTRIC PARKING BRAKE] .) Are any DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [ELECTRIC PARKING BRAKE] .)
1		No	Go to the next step.
2	VERIFY IF THE ELECTRIC PARKING BRAKE WARNING LIGHT IS TURNED ON Verify if the electric parking brake warning light is turned on. Is the electric parking brake warning light turned on?	Yes	Perform an inspection referring to "ELECTRIC PARKING BRAKE WARNING LIGHT TURNS ON". (See ELECTRIC PARKING BRAKE WARNING LIGHT TURNS ON [ELECTRIC PARKING BRAKE] .)
2		No	Go to the next step.
3	DETERMINE MALFUNCTIONING LOCATION BY PERFORMING PID/DATA MONITOR INSPECTION Using the M-MDS, display the following PIDs for the rear body control module (RBCM). (See PID/DATA MONITOR INSPECTION [REAR BODY CONTROL MODULE (RBCM)] .) DOOR_D (Front door (LH) open/closed condition) Using the M-MDS, display the following PIDs for the SAS control module. (See PID/DATA MONITOR INSPECTION [STANDARD DEPLOYMENT CONTROL SYSTEM] .) (See PID/DATA MONITOR INSPECTION [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .) SEET_B_D (Driver's seat belt fastened) Does the PID monitoring value switch correctly in conjunction with the opening/closing of the front door (LH) or with the driver's seat belt fastened?	Yes	Replace the electric parking brake control module. (See ELECTRIC PARKING BRAKE CONTROL MODULE REMOVAL .) (See ELECTRIC PARKING BRAKE CONTROL MODULE INSTALLATION .)
3		No	Not in conjunction with front door (LH) open/close Go to the next step. Not in conjunction with driver's seat belt fastened Go to Step 10.
4	INSPECT FRONT DOOR LATCH AND LOCK ACTUATOR (LH) CONNECTOR CONDITION Switch the ignition off. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5] .) Disconnect the front door latch and lock actuator (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.
4		No	Repair or replace the connector.
5	INSPECT FRONT DOOR LATCH SWITCH (LH) Inspect the front door latch switch (LH). (See FRONT DOOR LATCH SWITCH INSPECTION .) Is the front door latch switch (LH) normal?	Yes	Go to the next step.
5		No	Replace the front door latch and lock actuator (LH). (See FRONT DOOR LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION .)
6	INSPECT FRONT DOOR LATCH SWITCH (LH) GROUND CIRCUIT FOR OPEN CIRCUIT Verify that the front door latch and lock actuator (LH) connector is disconnected. Inspect the wiring harness for continuity between front door latch and lock actuator (LH) terminal J (wiring harness-side) and body ground. Is there continuity?	Yes	Go to the next step.
6		No	Refer to the wiring diagram and verify whether or not there is a common connector between front door latch and lock actuator (LH) terminal J and body ground. 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.
7	INSPECT REAR BODY CONTROL MODULE (RBCM) CONNECTOR CONDITION Disconnect the rear body control module (RBCM) 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.
7		No	Repair or replace the connector.
8	INSPECT FRONT DOOR LATCH SWITCH (LH) CIRCUIT FOR SHORT TO POWER SUPPLY Verify that the front door latch and lock actuator (LH) and rear body control module (RBCM) connectors are disconnected. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5] .) Switch the ignition ON (engine off or on). Measure the voltage at the front door latch and lock actuator (LH) terminal L (wiring harness-side). Is the voltage 0 V ?	Yes	Go to the next step.
8		No	Refer to the wiring diagram and verify whether or not there is a common connector between front door latch and lock actuator (LH) terminal L and rear body control module (RBCM) terminal 3W. 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.
9	INSPECT FRONT DOOR LATCH SWITCH (LH) CIRCUIT FOR OPEN CIRCUIT Switch the ignition off. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5] .) Verify that the front door latch and lock actuator (LH) and rear body control module (RBCM) connectors are disconnected. Inspect the wiring harness for continuity between front door latch and lock actuator (LH) terminal L (wiring harness-side) and rear body control module (RBCM) terminal 3W (wiring harness-side). Is there continuity?	Yes	Replace the rear body control module (RBCM). (See REAR BODY CONTROL MODULE (RBCM) REMOVAL/INSTALLATION .)
9		No	Refer to the wiring diagram and verify whether or not there is a common connector between front door latch and lock actuator (LH) terminal L and rear body control module (RBCM) terminal 3W. 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.
10	INSPECT DRIVER-SIDE BUCKLE SWITCH CONNECTOR CONDITION Switch the ignition off. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5] .) Disconnect the driver-side buckle switch 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.
10		No	Repair or replace the connector.
11	INSPECT DRIVER-SIDE BUCKLE SWITCH Inspect the driver-side buckle switch. (See BUCKLE SWITCH INSPECTION .) Is the driver-side buckle switch normal?	Yes	Go to the next step.
11		No	Replace the driver-side front buckle. (See FRONT BUCKLE REMOVAL/INSTALLATION .)
12	INSPECT DRIVER-SIDE BUCKLE SWITCH GROUND CIRCUIT FOR OPEN CIRCUIT Verify that the driver-side buckle switch connector is disconnected. Inspect the wiring harness for continuity between driver-side buckle switch terminal 5A (wiring harness-side) and body ground. Is there continuity?	Yes	Go to the next step.
12		No	Refer to the wiring diagram and verify whether or not there is a common connector between driver-side buckle switch terminal 5A and body ground. 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.
13	INSPECT SAS CONTROL MODULE CONNECTOR CONDITION Disconnect the SAS 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.
13		No	Repair or replace the connector.
14	INSPECT DRIVER-SIDE BUCKLE SWITCH CIRCUIT FOR SHORT TO POWER SUPPLY Verify that the driver-side buckle switch and SAS control module connectors are disconnected. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5] .) Switch the ignition ON (engine off or on). Measure the voltage at the driver-side buckle switch terminal 5B (wiring harness-side). Is the voltage 0 V ?	Yes	Go to the next step.
14		No	Refer to the wiring diagram and verify whether or not there is a common connector between driver-side buckle switch terminal 5B and SAS control module terminal 2N. 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.
15	INSPECT DRIVER-SIDE BUCKLE SWITCH CIRCUIT FOR OPEN CIRCUIT Switch the ignition off. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5] .) Verify that the driver-side buckle switch and SAS control module connectors are disconnected. Inspect the wiring harness for continuity between driver-side buckle switch terminal 5B (wiring harness-side) and SAS control module terminal 2N (wiring harness-side). Is there continuity?	Yes	Replace the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM] .) (See SAS CONTROL MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .)
15		No	Refer to the wiring diagram and verify whether or not there is a common connector between driver-side buckle switch terminal 5B and SAS control module terminal 2N. 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.