Diagnostic procedure

STEP	INSPECTION		ACTION
1	INSPECT POWER SUPPLY (SYSTEM) CIRCUIT Measure the voltage at the DSC HU/CM connector terminal AF (vehicle harness side) and body ground. Ignition switch OFF: 1 V or less Ignition switch ON (engine off): B+ Is the voltage normal?	Yes	Go to the next step.
1		No	Refer to the wiring diagram and verify whether or not there is a common connector between ignition switch and DSC HU/CM terminal AF (vehicle harness side). 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 open circuit. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has a open circuit. Go to Step 8.
2	VERIFY OPEN OR SHORT CIRCUIT IN BRAKE SWITCH SIGNAL Measure the voltage between the PCM connector terminal 2G (vehicle harness-side) and body ground when the brake pedal is depressed and released. Brake pedal depressed: B+ Brake pedal released: 1 V or less Is the voltage normal?	Yes	Go to the Step 8.
2		No	If it is B+ under any condition, then go to the next step. If it is 1 V or less under any condition, then go to Step 4.
3	INSPECT BRAKE SWITCH SIGNAL FOR SHORT TO POWER SUPPLY CIRCUIT Disconnect the brake switch connector. Measure voltage between the brake switch connector terminal D (vehicle harness-side) and body ground. Is the voltage 1 V or less ?	Yes	Go to Step 4.
3		No	Refer to the wiring diagram and verify whether or not there is a common connector between PCM connector terminal 2G (vehicle harness-side) and brake switch connector terminal D (vehicle harness side). 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.
4	INSPECT BRAKE SWITCH SIGNAL FOR OPEN CIRCUIT Disconnect the PCM connectors. Inspect continuity between the PCM connector terminal 2G (vehicle harness-side) and brake switch connector terminal D (vehicle harness-side). Is there continuity?	Yes	Go to the next step.
4		No	Refer to the wiring diagram and verify whether or not there is a common connector between PCM connector terminal 2G (vehicle harness-side) and brake switch connector terminal D (vehicle harness side). 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 8.
5	INSPECT BRAKE SWITCH Inspect the brake switch. (See BRAKE SWITCH INSPECTION .) Is the brake switch normal?	Yes	Go to the next step.
5		No	Replace the brake switch, then go to Step 8. (See BRAKE PEDAL REMOVAL/INSTALLATION .)
6	VERIFY REAR BODY CONTROL MODULE (RBCM) DTC Using the M-MDS, perform the rear body control module (RBCM) DTC inspection. (See DTC INSPECTION [REAR BODY CONTROL MODULE (RBCM)] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [REAR BODY CONTROL MODULE (RBCM)] .) DTC troubleshooting completed, then go to Step 8.
6		No	Go to the next step.
7	VERIFY PCM DTC Using the M-MDS, perform the PCM DTC inspection. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-G 2.5] .) DTC troubleshooting completed, then go to the next step.
7		No	Go to the next step.
8	VERIFY DTC TROUBLESHOOTING COMPLETED Using the M-MDS, clear the DTC from the DSC HU/CM. (See CLEARING DTC [DYNAMIC STABILITY CONTROL (DSC)] .) Start the engine and drive the vehicle at 20 km/h {12 mph} or more. Gradually slow down and stop vehicle. Using the M-MDS, perform the DSC HU/CM DTC inspection. (See DTC INSPECTION [DYNAMIC STABILITY CONTROL (DSC)] .) Is the same DTC present?	Yes	Repeat the inspection from Step1.
8		No	Go to the next step.
9	VERIFY NO DTC IS PRESENT Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [DYNAMIC STABILITY CONTROL (DSC)] .)
9	VERIFY NO DTC IS PRESENT Are any DTCs present?	No	DTC troubleshooting completed.