NO.7 LIMITED i-stop FUNCTION OPERATION TIME [SKYACTIV-D 2.2]

7	LIMITED i-stop FUNCTION OPERATION TIME
DESCRIPTION	• Frequency of which i-stop function operates is low. • Frequent occurrence of engine restarting other than for driving vehicle from stop.
POSSIBLE CAUSE	Note • To ensure electric vehicle system reliability, restart the engine regardless of the vehicle condition after 120 s have elapsed since the i-stop function operated. Battery voltage low during i-stop function operation • Battery deterioration • Insufficient battery recharge while engine is running ― Low recharge effect • Generator malfunction (part, system, control malfunction) • Large amount of vehicle power consumption • High electrical load from aftermarket electrical accessories False detection of engine starting conditions • False detection of battery voltage • False detection of low power brake unit load ― Power brake unit vacuum sensor malfunction ― Short or open circuit in wiring harness between the following terminals: • Power brake unit vacuum sensor terminal A—PCM terminal 2BB • Power brake unit vacuum sensor terminal B—PCM terminal 2BC • Power brake unit vacuum sensor terminal C—PCM terminal 2BD ― Power brake unit malfunction (air tightness malfunction) ― Malfunction in vacuum hose to power brake unit (damage, bad check valve) • Front climate control unit falsely recognizes MAX HOT or MAX COLD of air mix door on driver-side ― Driver-side front air mix actuator malfunction ― Driver-side front air mix actuator position sensor malfunction ― Driver-side air mix door link stuck False recognition of driver performing engine start operation • False detection of released brake pedal ― Brake fluid pressure sensor (built-into DSC HU/CM) malfunction • False detection of steering wheel operation ― Steering angle sensor initialization malfunction ― EPS control module malfunction ― Steering angle sensor malfunction ― Short or open circuit in wiring harness between steering angle sensor and start stop unit terminals 1U, 1T, 1W or 1S

LIMITED i-stop FUNCTION OPERATION TIME

DESCRIPTION

• Frequency of which i-stop function operates is low.

• Frequent occurrence of engine restarting other than for driving vehicle from stop.

POSSIBLE CAUSE

Note

• To ensure electric vehicle system reliability, restart the engine regardless of the vehicle condition after 120 s have elapsed since the i-stop function operated.

Battery voltage low during i-stop function operation

• Battery deterioration

• Insufficient battery recharge while engine is running

― Low recharge effect

• Generator malfunction (part, system, control malfunction)

• Large amount of vehicle power consumption

• High electrical load from aftermarket electrical accessories

False detection of engine starting conditions

• False detection of battery voltage

• False detection of low power brake unit load

― Power brake unit vacuum sensor malfunction

― Short or open circuit in wiring harness between the following terminals:

• Power brake unit vacuum sensor terminal A—PCM terminal 2BB

• Power brake unit vacuum sensor terminal B—PCM terminal 2BC

• Power brake unit vacuum sensor terminal C—PCM terminal 2BD

― Power brake unit malfunction (air tightness malfunction)

― Malfunction in vacuum hose to power brake unit (damage, bad check valve)

• Front climate control unit falsely recognizes MAX HOT or MAX COLD of air mix door on driver-side

― Driver-side front air mix actuator malfunction

― Driver-side front air mix actuator position sensor malfunction

― Driver-side air mix door link stuck

False recognition of driver performing engine start operation

• False detection of released brake pedal

― Brake fluid pressure sensor (built-into DSC HU/CM) malfunction

• False detection of steering wheel operation

― Steering angle sensor initialization malfunction

― EPS control module malfunction

― Steering angle sensor malfunction

― Short or open circuit in wiring harness between steering angle sensor and start stop unit terminals 1U, 1T, 1W or 1S

STEP	INSPECTION	RESULTS	ACTION
1	INSPECT EFFECT OF NON-GENUINE ELECTRICAL ACCESSORY FOR CAUSE OF MALFUNCTION • Remove any non-genuine electrical accessory. • Verify the malfunction symptom. • Is the frequency of the engine restarting from the i-stop off condition the same as that of another vehicle of the same model?	Yes	The system is normal. • Explain to the customer that the frequency of the engine restarting increases due to the effect of the non-genuine electrical accessory installed.
No	Go to the next step.
2	VERIFY DTC • Retrieve the PCM, TCM, rear body control module (RBCM), DSC HU/CM, instrument cluster and front climate control unit DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)].) (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (GW6A-EL, GW6AX-EL)].) (See DTC INSPECTION [REAR BODY CONTROL MODULE (RBCM)].) (See DTC INSPECTION [DYNAMIC STABILITY CONTROL (DSC)].) (See DTC INSPECTION [INSTRUMENT CLUSTER].) (See DTC DISPLAY [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [PCM (SKYACTIV-D 2.2)].) (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (GW6A-EL, GW6AX-EL)].) (See DTC TABLE [REAR BODY CONTROL MODULE (RBCM)].) (See DTC TABLE [DYNAMIC STABILITY CONTROL (DSC)].) (See DTC TABLE [INSTRUMENT CLUSTER].) (See DTC TABLE [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)
No	Go to the next step.
3	VERIFY BATTERY CONDITION • Inspect the battery. (See BATTERY INSPECTION.) • Is there any malfunction?	Yes	Go to the next step.
No	Go to Step 5.
4	DETERMINE IF MALFUNCTION CAUSE IS BATTERY OR GENERATOR • Recharge the battery. (See BATTERY RECHARGING.) • Inspect the battery again. (See BATTERY INSPECTION.) • Is there any malfunction?	Yes	Replace the battery, then go to Step 18. (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
No	Go to the next step.
5	INSPECT GENERATOR • Inspect the generator. (See GENERATOR INSPECTION [SKYACTIV-D 2.2].) • Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 18.
No	Go to the next step.
6	DETERMINE IF MALFUNCTION CAUSE IS STEERING ANGLE SENSOR SIGNAL OR OTHER • Start the engine and let it idle. • Access the EPS control module PID STR_ANG using the M-MDS. (See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS [ELECTRIC POWER STEERING (EPS)].) • Is the PID value normal? (See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS [ELECTRIC POWER STEERING (EPS)].)	Yes	Go to Step 11.
No	Go to the next step.
7	INSPECT EPS CONTROL MODULE FOR MALFUNCTION • Inspect the EPS control module. (See EPS CONTROL MODULE INSPECTION.) • Is the EPS control module normal?	Yes	Perform the following procedure: 1. Switch the ignition off, and after 2 min or more have elapsed, switch the ignition ON. 2. Start the engine and drive the vehicle 10 m {33 ft} or more in a straight line at a speed of 10 km/h {6.2 mph} or more. 3. Stop the vehicle with the wheels in the straight-ahead position. 4. Access the EPS control module PID STR_ANG using the M-MDS. (See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS [ELECTRIC POWER STEERING (EPS)].) • If the STR_ANG value is normal, go to Step 18. (Because the steering angle (estimated absolute angle) has returned to normal) • If the STR_ANG value is not normal, replace the EPS control module, then go to Step 18. (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.)
No	Replace the EPS control module, then go to Step 18. (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.)
8	INSPECT STEERING ANGLE SENSOR FOR MALFUNCTION • Inspect the steering angle sensor. (See STEERING ANGLE SENSOR INSPECTION.) • Is the steering angle sensor normal?	Yes	Go to the next step.
No	Replace the steering angle sensor, then go to Step 18. (See STEERING ANGLE SENSOR REMOVAL/INSTALLATION.)
9	INSPECT EPS CONTROL MODULE FOR MALFUNCTION • Inspect the EPS control module. (See EPS CONTROL MODULE INSPECTION.) • Is the EPS control module normal?	Yes	Perform the following procedure: 1. Switch the ignition off, and after 2 min or more have elapsed, switch the ignition ON. 2. Start the engine and drive the vehicle 10 m {33 ft} or more in a straight line at a speed of 10 km/h {6.2 mph} or more. 3. Stop the vehicle with the wheels in the straight-ahead position. 4. Access the EPS control module PID STR_ANG using the M-MDS. (See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS [ELECTRIC POWER STEERING (EPS)].) • If the STR_ANG value is normal, go to Step 18. (Because the steering angle (estimated absolute angle) has returned to normal) • If the STR_ANG value is not normal, replace the EPS control module, then go to Step 18. (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.)
No	Replace the EPS control module, then go to Step 18. (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.)
10	INSPECT STEERING ANGLE SENSOR CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT • Inspect for open or short circuit between the following terminals (wiring harness-side): ― Steering angle sensor terminal A—Start stop unit terminal 1U ― Steering angle sensor terminal B—Start stop unit terminal 1T ― Steering angle sensor terminal C—Start stop unit terminal 1W ― Steering angle sensor terminal D—Start stop unit terminal 1S • Is there any malfunction?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Steering angle sensor terminal A—Start stop unit terminal 1U • Steering angle sensor terminal B—Start stop unit terminal 1T • Steering angle sensor terminal C—Start stop unit terminal 1W • Steering angle sensor terminal D—Start stop unit terminal 1S 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 or open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to ground or open circuit. Go to Step 18.
No	Go to the next step.
11	DETERMINE IF MALFUNCTION CAUSE IS POWER BRAKE UNIT VACUUM SENSOR SIGNAL OR OTHER • Put the vehicle in an i-stop condition (engine stopped). • Access the PCM PID BBP using the M-MDS with the brake pedal depressed and the engine stopped. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)].) • Does the BBP PID value remain less than −43 kPa {−0.44 kgf/cm², −6.2 psi}?	Yes	Go to Step 15.
No	Go to the next step.
12	INSPECT POWER BRAKE UNIT VACUUM SENSOR FOR AIR TIGHTNESS MALFUNCTION • Perform the vacuum function inspection for the power brake unit and the vacuum loss inspection. (See POWER BRAKE UNIT INSPECTION.) • Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 18.
No	Go to the next step.
13	INSPECT POWER BRAKE UNIT VACUUM SENSOR • Inspect the power brake unit vacuum sensor. (See POWER BRAKE UNIT VACUUM SENSOR INSPECTION [SKYACTIV-D 2.2].) • Is there any malfunction?	Yes	Replace the power brake unit vacuum sensor, then go to Step 18. (See POWER BRAKE UNIT VACUUM SENSOR REMOVAL/INSTALLATION [L.H.D.].) (See POWER BRAKE UNIT VACUUM SENSOR REMOVAL/INSTALLATION [R.H.D.].)
No	Go to the next step.
14	INSPECT POWER BRAKE UNIT VACUUM SENSOR CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT • Inspect for open or short circuit between the following terminals (wiring harness-side): ― Power brake unit vacuum sensor terminal A—PCM terminal 2BB ― Power brake unit vacuum sensor terminal B—PCM terminal 2BC ― Power brake unit vacuum sensor terminal C—PCM terminal 2BD • Is there any malfunction?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Power brake unit vacuum sensor terminal A—PCM terminal 2BB • Power brake unit vacuum sensor terminal B—PCM terminal 2BC • Power brake unit vacuum sensor terminal C—PCM terminal 2BD 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 or open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to ground or open circuit. Go to Step 18.
No	Replace the PCM, then go to Step 18. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
15	DETERMINE IF MALFUNCTION CAUSE IS DRIVER-SIDE AIR MIX ACTUATOR SIGNAL OR OTHER • Measure the voltage at the following terminal (wiring harness-side) when the driver-side temperature setting is MAX HOT and MAX COLD. ― Front climate control unit terminal 2I) • Is the voltage normal? (See FRONT CLIMATE CONTROL UNIT INSPECTION.)	Yes	Go to Step 17.
No	Go to the next step.
16	INSPECT DRIVER-SIDE AIR MIX ACTUATOR • Inspect the driver-side front air mix actuator. (See FRONT AIRFLOW MODE ACTUATOR INSPECTION.) • Is there any malfunction?	Yes	Replace the front driver-side air mix actuator. (See FRONT AIR MIX ACTUATOR REMOVAL/INSTALLATION.)
No	Inspect the front air mix actuator and linkage for sticking. (See FRONT A/C UNIT DISASSEMBLY/ASSEMBLY.) • If there is any malfunction: ― Repair or replace the malfunctioning part according to the inspection results.
17	DETERMINE IF MALFUNCTION CAUSE IS BRAKE FLUID PRESSURE SENSOR SIGNAL OR OTHER • Put the vehicle in an i-stop condition (engine stopped). • Monitor the PCM PID BFP using the M-MDS while the brake is depressed and held with the i-stop function operating. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)].) • Does the monitoring value change?	Yes	Repeat the inspection from Step 1. • If the malfunction is not resolved, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) • Go to the next step.
No	Brake fluid pressure sensor malfunction. • Replace the DSC HU/CM, then go to the next step. (See DSC HU/CM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
18	Verify the test results. • If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [SKYACTIV-D 2.2].) • If a malfunction remains, inspect the related Service Information and perform the repair or diagnosis. ― If the vehicle is repaired, troubleshooting is completed. ― If the vehicle is not repaired or additional diagnostic information is not available, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

STEP

INSPECTION

RESULTS

ACTION

INSPECT EFFECT OF NON-GENUINE ELECTRICAL ACCESSORY FOR CAUSE OF MALFUNCTION

• Remove any non-genuine electrical accessory.

• Verify the malfunction symptom.

• Is the frequency of the engine restarting from the i-stop off condition the same as that of another vehicle of the same model?

Yes

The system is normal.

• Explain to the customer that the frequency of the engine restarting increases due to the effect of the non-genuine electrical accessory installed.

Go to the next step.

VERIFY DTC

• Retrieve the PCM, TCM, rear body control module (RBCM), DSC HU/CM, instrument cluster and front climate control unit DTCs using the M-MDS.

(See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)].)

(See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (GW6A-EL, GW6AX-EL)].)

(See DTC INSPECTION [REAR BODY CONTROL MODULE (RBCM)].)

(See DTC INSPECTION [DYNAMIC STABILITY CONTROL (DSC)].)

(See DTC INSPECTION [INSTRUMENT CLUSTER].)

(See DTC DISPLAY [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [PCM (SKYACTIV-D 2.2)].)

(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (GW6A-EL, GW6AX-EL)].)

(See DTC TABLE [REAR BODY CONTROL MODULE (RBCM)].)

(See DTC TABLE [DYNAMIC STABILITY CONTROL (DSC)].)

(See DTC TABLE [INSTRUMENT CLUSTER].)

(See DTC TABLE [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)

Go to the next step.

VERIFY BATTERY CONDITION

• Inspect the battery.

(See BATTERY INSPECTION.)

• Is there any malfunction?

Yes

Go to the next step.

Go to Step 5.

DETERMINE IF MALFUNCTION CAUSE IS BATTERY OR GENERATOR

• Recharge the battery.

(See BATTERY RECHARGING.)

• Inspect the battery again.

(See BATTERY INSPECTION.)

• Is there any malfunction?

Yes

Replace the battery, then go to Step 18.

(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

Go to the next step.

INSPECT GENERATOR

• Inspect the generator.

(See GENERATOR INSPECTION [SKYACTIV-D 2.2].)

• Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 18.

Go to the next step.

DETERMINE IF MALFUNCTION CAUSE IS STEERING ANGLE SENSOR SIGNAL OR OTHER

• Start the engine and let it idle.

• Access the EPS control module PID STR_ANG using the M-MDS.

(See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS [ELECTRIC POWER STEERING (EPS)].)

• Is the PID value normal?

(See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS [ELECTRIC POWER STEERING (EPS)].)

Yes

Go to Step 11.

Go to the next step.

INSPECT EPS CONTROL MODULE FOR MALFUNCTION

• Inspect the EPS control module.

(See EPS CONTROL MODULE INSPECTION.)

• Is the EPS control module normal?

Yes

Perform the following procedure:

1. Switch the ignition off, and after 2 min or more have elapsed, switch the ignition ON.

2. Start the engine and drive the vehicle 10 m {33 ft} or more in a straight line at a speed of 10 km/h {6.2 mph} or more.

3. Stop the vehicle with the wheels in the straight-ahead position.

4. Access the EPS control module PID STR_ANG using the M-MDS.

(See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS [ELECTRIC POWER STEERING (EPS)].)

• If the STR_ANG value is normal, go to Step 18. (Because the steering angle (estimated absolute angle) has returned to normal)

• If the STR_ANG value is not normal, replace the EPS control module, then go to Step 18.

(See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.)

Replace the EPS control module, then go to Step 18.

(See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.)

INSPECT STEERING ANGLE SENSOR FOR MALFUNCTION

• Inspect the steering angle sensor.

(See STEERING ANGLE SENSOR INSPECTION.)

• Is the steering angle sensor normal?

Yes

Go to the next step.

Replace the steering angle sensor, then go to Step 18.

(See STEERING ANGLE SENSOR REMOVAL/INSTALLATION.)

INSPECT EPS CONTROL MODULE FOR MALFUNCTION

• Inspect the EPS control module.

(See EPS CONTROL MODULE INSPECTION.)

• Is the EPS control module normal?

Yes

Perform the following procedure:

1. Switch the ignition off, and after 2 min or more have elapsed, switch the ignition ON.

2. Start the engine and drive the vehicle 10 m {33 ft} or more in a straight line at a speed of 10 km/h {6.2 mph} or more.

3. Stop the vehicle with the wheels in the straight-ahead position.

4. Access the EPS control module PID STR_ANG using the M-MDS.

(See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS [ELECTRIC POWER STEERING (EPS)].)

• If the STR_ANG value is normal, go to Step 18. (Because the steering angle (estimated absolute angle) has returned to normal)

• If the STR_ANG value is not normal, replace the EPS control module, then go to Step 18.

(See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.)

Replace the EPS control module, then go to Step 18.

(See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.)

INSPECT STEERING ANGLE SENSOR CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT

• Inspect for open or short circuit between the following terminals (wiring harness-side):

― Steering angle sensor terminal A—Start stop unit terminal 1U

― Steering angle sensor terminal B—Start stop unit terminal 1T

― Steering angle sensor terminal C—Start stop unit terminal 1W

― Steering angle sensor terminal D—Start stop unit terminal 1S

• Is there any malfunction?

Yes

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

• Steering angle sensor terminal A—Start stop unit terminal 1U

• Steering angle sensor terminal B—Start stop unit terminal 1T

• Steering angle sensor terminal C—Start stop unit terminal 1W

• Steering angle sensor terminal D—Start stop unit terminal 1S

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 or open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

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

Go to Step 18.

Go to the next step.

DETERMINE IF MALFUNCTION CAUSE IS POWER BRAKE UNIT VACUUM SENSOR SIGNAL OR OTHER

• Put the vehicle in an i-stop condition (engine stopped).

• Access the PCM PID BBP using the M-MDS with the brake pedal depressed and the engine stopped.

(See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)].)

• Does the BBP PID value remain less than −43 kPa {−0.44 kgf/cm², −6.2 psi}?

Yes

Go to Step 15.

Go to the next step.

INSPECT POWER BRAKE UNIT VACUUM SENSOR FOR AIR TIGHTNESS MALFUNCTION

• Perform the vacuum function inspection for the power brake unit and the vacuum loss inspection.

(See POWER BRAKE UNIT INSPECTION.)

• Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 18.

Go to the next step.

INSPECT POWER BRAKE UNIT VACUUM SENSOR

• Inspect the power brake unit vacuum sensor.

(See POWER BRAKE UNIT VACUUM SENSOR INSPECTION [SKYACTIV-D 2.2].)

• Is there any malfunction?

Yes

Replace the power brake unit vacuum sensor, then go to Step 18.

(See POWER BRAKE UNIT VACUUM SENSOR REMOVAL/INSTALLATION [L.H.D.].)

(See POWER BRAKE UNIT VACUUM SENSOR REMOVAL/INSTALLATION [R.H.D.].)

Go to the next step.

INSPECT POWER BRAKE UNIT VACUUM SENSOR CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT

• Inspect for open or short circuit between the following terminals (wiring harness-side):

― Power brake unit vacuum sensor terminal A—PCM terminal 2BB

― Power brake unit vacuum sensor terminal B—PCM terminal 2BC

― Power brake unit vacuum sensor terminal C—PCM terminal 2BD

• Is there any malfunction?

Yes

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

• Power brake unit vacuum sensor terminal A—PCM terminal 2BB

• Power brake unit vacuum sensor terminal B—PCM terminal 2BC

• Power brake unit vacuum sensor terminal C—PCM terminal 2BD

If there is a common connector:

• Repair or replace the malfunctioning part.

If there is no common connector:

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

Go to Step 18.

Replace the PCM, then go to Step 18.

(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

DETERMINE IF MALFUNCTION CAUSE IS DRIVER-SIDE AIR MIX ACTUATOR SIGNAL OR OTHER

• Measure the voltage at the following terminal (wiring harness-side) when the driver-side temperature setting is MAX HOT and MAX COLD.

― Front climate control unit terminal 2I)

• Is the voltage normal?

(See FRONT CLIMATE CONTROL UNIT INSPECTION.)

Yes

Go to Step 17.

Go to the next step.

INSPECT DRIVER-SIDE AIR MIX ACTUATOR

• Inspect the driver-side front air mix actuator.

(See FRONT AIRFLOW MODE ACTUATOR INSPECTION.)

• Is there any malfunction?

Yes

Replace the front driver-side air mix actuator.

(See FRONT AIR MIX ACTUATOR REMOVAL/INSTALLATION.)

Inspect the front air mix actuator and linkage for sticking.

(See FRONT A/C UNIT DISASSEMBLY/ASSEMBLY.)

• If there is any malfunction:

― Repair or replace the malfunctioning part according to the inspection results.

DETERMINE IF MALFUNCTION CAUSE IS BRAKE FLUID PRESSURE SENSOR SIGNAL OR OTHER

• Put the vehicle in an i-stop condition (engine stopped).

• Monitor the PCM PID BFP using the M-MDS while the brake is depressed and held with the i-stop function operating.

(See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)].)

• Does the monitoring value change?

Yes

Repeat the inspection from Step 1.

• If the malfunction is not resolved, replace the PCM.

(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

• Go to the next step.

Brake fluid pressure sensor malfunction.

• Replace the DSC HU/CM, then go to the next step.

(See DSC HU/CM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

Verify the test results.

• If normal, return to the diagnostic index to service any additional symptoms.

(See SYMPTOM DIAGNOSTIC INDEX [SKYACTIV-D 2.2].)

• If a malfunction remains, inspect the related Service Information and perform the repair or diagnosis.

― If the vehicle is repaired, troubleshooting is completed.

― If the vehicle is not repaired or additional diagnostic information is not available, replace the PCM.

(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)