SMART CITY BRAKE SUPPORT [REVERSE] (SCBS R) DOES NOT OPERATE/OPERATES INCORRECTLY [SMART CITY BRAKE SUPPORT [REVERSE] (SCBS R)]

• If there is any vehicle malfunction complaint lodged by a customer, perform FOREWORD [SMART CITY BRAKE SUPPORT [REVERSE] (SCBS R)] malfunction diagnosis according to the troubleshooting procedure. (See FOREWORD [SMART CITY BRAKE SUPPORT [REVERSE] (SCBS R)].)

Step	Inspection	Action
1	VERIFY MALFUNCTION SYMPTOM Note • Due to the date of production, different message is shown on the display. • Verify that the warning is displayed in the multi-information display when the shift lever is in the reverse position (MTX) or the selector lever is in the R position (ATX). ― SCBS Reverse malfunction ― Smart City Brake Support Reverse Disabled • Is the warning displayed?	Yes	Perform an inspection referring to "WARNING IS DISPLAYED IN MULTI-INFORMATION DISPLAY WHEN SHIFT LEVER IS IN REVERSE POSITION (MTX) OR SELECTOR LEVER IS IN R POSITION (ATX)". (See WARNING IS DISPLAYED IN MULTI-INFORMATION DISPLAY WHEN SHIFT LEVER IS IN REVERSE POSITION (MTX) OR SELECTOR LEVER IS IN R POSITION (ATX) [SMART CITY BRAKE SUPPORT [REVERSE] (SCBS R)].)
No	Go to the next step.
2	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 [PARKING ASSIST UNIT].) • Are any DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [PARKING ASSIST UNIT].)
No	Go to the next step.
3	VERIFY REAR BUMPER EXTERNAL APPEARANCE AND INSTALLATION CONDITION • Verify that the rear bumper external appearance and installation condition. • Are the rear bumper external appearance and installation condition normal?	Yes	Go to the next step.
No	Repair or replace the rear bumper. (See REAR BUMPER REMOVAL.) (See REAR BUMPER INSTALLATION.)
4	VERIFY IF SYSTEM IS PURSUANT TO INHIBIT/LIMIT CONDITIONS • Perform the malfunction diagnosis for the inhibit/limit conditions and verify if the system is pursuant to the inhibit/limit conditions. (See PERFORM MALFUNCTION DIAGNOSIS FOR INHIBIT/LIMIT [PARKING ASSIST UNIT].) • Is there anything pursuant to the inhibit/limit conditions?	Yes	Perform malfunction diagnosis for inhibit/limit conditions. (See PERFORM MALFUNCTION DIAGNOSIS FOR INHIBIT/LIMIT [PARKING ASSIST UNIT].)
No	Go to the next step.
5	INSPECT PARKING ASSIST UNIT CONNECTOR CONDITION • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Disconnect the parking assist unit 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.
6	VERIFY MALFUNCTION CONDITION • Verify with the customer the malfunction condition. • At the time of the malfunction, did the customer drive the vehicle under any of the following conditions? ― Steep slope ― Steering angle is wide (turn the steering wheel too far)	Yes	System is normal. (Explain to the customer that the system does not operate on steep slopes or if the steering angle is too wide.)
No	Go to the next step.
7	DETERMINE MALFUNCTION CAUSE • Using the M-MDS, display the following PIDs for the parking assist unit. (See PID/DATA MONITOR INSPECTION [PARKING ASSIST UNIT].) ― REVERSE_LMP (Back-up light illumination condition) • Does the shift lever position (MTX) or selector lever position (ATX) switch correctly in conjunction with the indicator?	Yes	Go to Step 18.
No	ATX: • Replace the TCM. (See CONTROL VALVE BODY REMOVAL [SJ6A-EL].) (See CONTROL VALVE BODY INSTALLATION [SJ6A-EL].) MTX: • Go to the next step.
8	INSPECT BACK-UP LIGHT SWITCH CONNECTOR CONDITION • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Disconnect the back-up light 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.
No	Repair or replace the connector.
9	INSPECT BACK-UP LIGHT SWITCH • Inspect the back-up light switch. (See BACK-UP LIGHT SWITCH INSPECTION.) • Is the back-up light switch normal?	Yes	Go to the next step.
No	Replace the back-ip light switch. (See BACK-UP LIGHT SWITCH REMOVAL/INSTALLATION [M66M-D].)
10	INSPECT BACK-UP LIGHT SWITCH GROUND CIRCUIT FOR OPEN CIRCUIT • Verify that the back-up light switch connector is disconnected. • Inspect the wiring harness for continuity between back-up light switch terminal B (wiring harness-side) and body ground. • 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 back-up light switch terminal B 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.
11	INSPECT PCM CONNECTOR CONDITION • Disconnect the PCM 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.
12	INSPECT BACK-UP LIGHT SWITCH CIRCUIT FOR SHORT TO GROUND • Verify that the back-up light switch and PCM connectors are disconnected. • Inspect for continuity between back-up light switch terminal A (wiring harness-side) and body ground. • Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Back-up light switch terminal A—PCM terminal 1AZ 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 ground. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to ground.
No	Go to the next step.
13	INSPECT BACK-UP LIGHT SWITCH CIRCUIT FOR SHORT TO POWER SUPPLY • Verify that the back-up light switch and PCM connectors are disconnected. • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Switch the ignition ON (engine off or on). • Measure the voltage at the back-up light switch terminal A (wiring harness-side). • Is the voltage 0 V?	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: • Back-up light switch terminal A—PCM terminal 1AZ 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.
14	INSPECT BACK-UP LIGHT SWITCH CIRCUIT FOR OPEN CIRCUIT • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Verify that the back-up light switch and PCM connectors are disconnected. • Inspect the wiring harness for continuity between the following terminals (wiring harness-side). ― Back-up light switch terminal A—PCM terminal 1AZ • Is there continuity?	Yes	Replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Back-up light switch terminal A—PCM terminal 1AZ 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.
15	INSPECT REAR ULTRASONIC SENSOR • Inspect the rear ultrasonic sensor. (See ULTRASONIC SENSOR INSPECTION.) • Is the rear ultrasonic sensor normal?	Yes	System is normal. (Explain the operating conditions and non-operating conditions of the system to the customer.)
No	Replace the malfunctioning rear ultrasonic sensor. (See ULTRASONIC SENSOR REMOVAL/INSTALLATION.)

Step

Inspection

Action

VERIFY MALFUNCTION SYMPTOM

Note

• Due to the date of production, different message is shown on the display.

• Verify that the warning is displayed in the multi-information display when the shift lever is in the reverse position (MTX) or the selector lever is in the R position (ATX).

― SCBS Reverse malfunction

― Smart City Brake Support Reverse Disabled

• Is the warning displayed?

Yes

Perform an inspection referring to "WARNING IS DISPLAYED IN MULTI-INFORMATION DISPLAY WHEN SHIFT LEVER IS IN REVERSE POSITION (MTX) OR SELECTOR LEVER IS IN R POSITION (ATX)".

(See WARNING IS DISPLAYED IN MULTI-INFORMATION DISPLAY WHEN SHIFT LEVER IS IN REVERSE POSITION (MTX) OR SELECTOR LEVER IS IN R POSITION (ATX) [SMART CITY BRAKE SUPPORT [REVERSE] (SCBS R)].)

Go to the next step.

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 [PARKING ASSIST UNIT].)

• Are any DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [PARKING ASSIST UNIT].)

Go to the next step.

VERIFY REAR BUMPER EXTERNAL APPEARANCE AND INSTALLATION CONDITION

• Verify that the rear bumper external appearance and installation condition.

• Are the rear bumper external appearance and installation condition normal?

Yes

Go to the next step.

Repair or replace the rear bumper.

(See REAR BUMPER REMOVAL.)

(See REAR BUMPER INSTALLATION.)

VERIFY IF SYSTEM IS PURSUANT TO INHIBIT/LIMIT CONDITIONS

• Perform the malfunction diagnosis for the inhibit/limit conditions and verify if the system is pursuant to the inhibit/limit conditions.

(See PERFORM MALFUNCTION DIAGNOSIS FOR INHIBIT/LIMIT [PARKING ASSIST UNIT].)

• Is there anything pursuant to the inhibit/limit conditions?

Yes

Perform malfunction diagnosis for inhibit/limit conditions.

(See PERFORM MALFUNCTION DIAGNOSIS FOR INHIBIT/LIMIT [PARKING ASSIST UNIT].)

Go to the next step.

INSPECT PARKING ASSIST UNIT CONNECTOR CONDITION

• Switch the ignition off.

• Disconnect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

• Disconnect the parking assist unit 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.

Repair or replace the connector.

VERIFY MALFUNCTION CONDITION

• Verify with the customer the malfunction condition.

• At the time of the malfunction, did the customer drive the vehicle under any of the following conditions?

― Steep slope

― Steering angle is wide (turn the steering wheel too far)

Yes

System is normal. (Explain to the customer that the system does not operate on steep slopes or if the steering angle is too wide.)

Go to the next step.

DETERMINE MALFUNCTION CAUSE

• Using the M-MDS, display the following PIDs for the parking assist unit.

(See PID/DATA MONITOR INSPECTION [PARKING ASSIST UNIT].)

― REVERSE_LMP (Back-up light illumination condition)

• Does the shift lever position (MTX) or selector lever position (ATX) switch correctly in conjunction with the indicator?

Yes

Go to Step 18.

ATX:

• Replace the TCM.

(See CONTROL VALVE BODY REMOVAL [SJ6A-EL].)

(See CONTROL VALVE BODY INSTALLATION [SJ6A-EL].)

MTX:

• Go to the next step.

INSPECT BACK-UP LIGHT SWITCH CONNECTOR CONDITION

• Switch the ignition off.

• Disconnect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

• Disconnect the back-up light 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.

Repair or replace the connector.

INSPECT BACK-UP LIGHT SWITCH

• Inspect the back-up light switch.

(See BACK-UP LIGHT SWITCH INSPECTION.)

• Is the back-up light switch normal?

Yes

Go to the next step.

Replace the back-ip light switch.

(See BACK-UP LIGHT SWITCH REMOVAL/INSTALLATION [M66M-D].)

INSPECT BACK-UP LIGHT SWITCH GROUND CIRCUIT FOR OPEN CIRCUIT

• Verify that the back-up light switch connector is disconnected.

• Inspect the wiring harness for continuity between back-up light switch terminal B (wiring harness-side) and body ground.

• Is there continuity?

Yes

Go to the next step.

Refer to the wiring diagram and verify whether or not there is a common connector between back-up light switch terminal B 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.

INSPECT PCM CONNECTOR CONDITION

• Disconnect the PCM 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.

Repair or replace the connector.

INSPECT BACK-UP LIGHT SWITCH CIRCUIT FOR SHORT TO GROUND

• Verify that the back-up light switch and PCM connectors are disconnected.

• Inspect for continuity between back-up light switch terminal A (wiring harness-side) and body ground.

• Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• Back-up light switch terminal A—PCM terminal 1AZ

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 ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

Go to the next step.

INSPECT BACK-UP LIGHT SWITCH CIRCUIT FOR SHORT TO POWER SUPPLY

• Verify that the back-up light switch and PCM connectors are disconnected.

• Connect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

• Switch the ignition ON (engine off or on).

• Measure the voltage at the back-up light switch terminal A (wiring harness-side).

• Is the voltage 0 V?

Yes

Go to the next step.

Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• Back-up light switch terminal A—PCM terminal 1AZ

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.

INSPECT BACK-UP LIGHT SWITCH CIRCUIT FOR OPEN CIRCUIT

• Switch the ignition off.

• Disconnect the negative battery terminal.

(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

• Verify that the back-up light switch and PCM connectors are disconnected.

• Inspect the wiring harness for continuity between the following terminals (wiring harness-side).

― Back-up light switch terminal A—PCM terminal 1AZ

• Is there continuity?

Yes

Replace the PCM.

(See PCM REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)

Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• Back-up light switch terminal A—PCM terminal 1AZ

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.

INSPECT REAR ULTRASONIC SENSOR

• Inspect the rear ultrasonic sensor.

(See ULTRASONIC SENSOR INSPECTION.)

• Is the rear ultrasonic sensor normal?

Yes

System is normal. (Explain the operating conditions and non-operating conditions of the system to the customer.)

Replace the malfunctioning rear ultrasonic sensor.

(See ULTRASONIC SENSOR REMOVAL/INSTALLATION.)