NO.28 i-stop WARNING LIGHT (AMBER) ILLUMINATES [SKYACTIV-G 2.0]

28	i-stop WARNING LIGHT (AMBER) ILLUMINATES
DESCRIPTION	• i-stop warning light (amber) remains illuminated while engine is running. • i-stop warning light (amber) illuminates and engine does not restart while i-stop function is operating.
POSSIBLE CAUSE	PCM does not recognize system is turned off using i-stop OFF switch • i-stop OFF switch malfunction ― i-stop OFF switch malfunction ― Short to ground in wiring harness between i-stop OFF switch terminal I and instrument cluster terminal 1E Instrument cluster malfunction • i-stop warming light (amber) illumination circuit in instrument cluster disabled False detection of engine restart inhibition conditions while i-stop function is operating • False detection of unfastened driver seat belt ― Driver-side buckle switch malfunction ― Short to ground in wiring harness between driver-side buckle switch terminal A and SAS control module terminal 2U • False detection of open door ― Door latch switch malfunction ― Open circuit in wiring harness between door latch switch and BCM • False detection of open bonnet ― Bonnet latch switch malfunction (stuck open) ― Open circuit in wiring harness between bonnet latch switch terminal A and BCM terminal 1J Engine system malfunction (engine does not start even though cranking for 3 s or more when engine is restarted) • Piston-stop malfunction while i-stop function is operating ― CKP sensor signal malfunction ― Throttle value operation malfunction (drive-by-wire control malfunction) ― Generator control malfunction ― Intake-air system related malfunction (air suction, vacuum hose breakage) ― Purge control malfunction ― Engine starting system malfunction ― Generator drive belt wear • Mechanical (engine) malfunction ― Valve timing malfunction ― Improper operation of electric variable valve timing control system (PCM DTC is stored.) ― Improper operation of hydraulic variable valve timing control system

i-stop WARNING LIGHT (AMBER) ILLUMINATES

DESCRIPTION

• i-stop warning light (amber) remains illuminated while engine is running.

• i-stop warning light (amber) illuminates and engine does not restart while i-stop function is operating.

POSSIBLE CAUSE

PCM does not recognize system is turned off using i-stop OFF switch

• i-stop OFF switch malfunction

― i-stop OFF switch malfunction

― Short to ground in wiring harness between i-stop OFF switch terminal I and instrument cluster terminal 1E

Instrument cluster malfunction

• i-stop warming light (amber) illumination circuit in instrument cluster disabled

False detection of engine restart inhibition conditions while i-stop function is operating

• False detection of unfastened driver seat belt

― Driver-side buckle switch malfunction

― Short to ground in wiring harness between driver-side buckle switch terminal A and SAS control module terminal 2U

• False detection of open door

― Door latch switch malfunction

― Open circuit in wiring harness between door latch switch and BCM

• False detection of open bonnet

― Bonnet latch switch malfunction (stuck open)

― Open circuit in wiring harness between bonnet latch switch terminal A and BCM terminal 1J

Engine system malfunction (engine does not start even though cranking for 3 s or more when engine is restarted)

• Piston-stop malfunction while i-stop function is operating

― CKP sensor signal malfunction

― Throttle value operation malfunction (drive-by-wire control malfunction)

― Generator control malfunction

― Intake-air system related malfunction (air suction, vacuum hose breakage)

― Purge control malfunction

― Engine starting system malfunction

― Generator drive belt wear

• Mechanical (engine) malfunction

― Valve timing malfunction

― Improper operation of electric variable valve timing control system (PCM DTC is stored.)

― Improper operation of hydraulic variable valve timing control system

STEP	INSPECTION	RESULTS	ACTION
1	VERIFY IF MALFUNCTION CAUSE IS ROUGH ENGINE STARTING • Start the engine. • Can the engine be started normally?	Yes	Go to the next step.
No	Perform the symptom troubleshooting "NO.3 WILL NOT CRANK" or "NO.4 HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK". (See NO.3 WILL NOT CRANK [SKYACTIV-G 2.0].) (See NO.4 HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK [SKYACTIV-G 2.0].)
2	VERIFY DTC • Retrieve the PCM, BCM, SAS control module, and instrument cluster DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0].) (See DTC INSPECTION [BCM].) (See DTC INSPECTION.) (See DTC INSPECTION [INSTRUMENT CLUSTER].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-G 2.0].) (See DTC TABLE [BCM].) (See DTC TABLE.) (See DTC TABLE [INSTRUMENT CLUSTER].)
No	Go to the next step.
3	VERIFY i-stop WARNING LIGHT (AMBER) CONDITION • Verify that the i-stop warning light (amber) illuminates while driving. • Does the i-stop warning light (amber) illuminate?	Yes	Go to the next step.
No	Go to Step 7.
4*	DETERMINE IF MALFUNCTION CAUSE IS i-stop OFF SWITCH SIGNAL OR OTHER • Measure the voltage at the instrument cluster terminal 1E with the i-stop OFF switch and related wiring harness are shaken. • Is the voltage normal when the i-stop OFF switch and related wiring harness are shaken?	Yes	Go to Step 6.
No	Go to the next step.
5	INSPECT i-stop OFF SWITCH • Inspect the i-stop OFF switch. (See i-stop OFF SWITCH INSPECTION [SKYACTIV-G 2.0].) • Is there any malfunction?	Yes	Replace the i-stop OFF switch. (See i-stop OFF SWITCH REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)
No	Repair or replace the wiring harness between i-stop OFF switch terminal I and instrument cluster terminal 1E for a possible short to ground.
6	DETERMINE IF MALFUNCTION CAUSE IS INSTRUMENT CLUSTER WARNING LIGHT ILLUMINATION CIRCUIT OR ERROR SIGNAL FROM PCM • Switch the ignition to ON. • Access the instrument cluster PID WL+IL and illuminate and turn off the warning light in the instrument cluster using the M-MDS. (See ACTIVE COMMAND MODES INSPECTION [INSTRUMENT CLUSTER].) • Does the i-stop warning light (amber) illuminate or turn off according to the M-MDS operation? (See ACTIVE COMMAND MODES TABLE [INSTRUMENT CLUSTER].)	Yes	Replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)
No	Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
7	DETERMINE IF MALFUNCTION CAUSE IS DRIVER-SIDE BUCKLE SWITCH SIGNAL OR OTHER • Does the malfunction occur when the driver's door is opened with the driver-side front seat belt fastened?	Yes	Go to the next step.
No	Go to Step 9.
8	INSPECT DRIVER-SIDE BUCKLE SWITCH • Inspect the driver-side buckle switch. (See BUCKLE SWITCH INSPECTION.) • Is there any malfunction?	Yes	Replace the driver-side buckle switch. (See FRONT BUCKLE REMOVAL/INSTALLATION.)
No	Repair or replace the wiring harness between driver-side buckle switch terminal A and SAS control module terminal 2U for a possible short to ground.
9	DETERMINE IF MALFUNCTION CAUSE IS DOOR LATCH SWITCH SIGNAL OR OTHER • Does the malfunction occur when the driver-side front seat belt is not fastened with the driver's door closed?	Yes	Go to the next step.
No	Go to Step 12.
10	DETERMINE IF MALFUNCTION CAUSE IS FRONT DOOR LATCH SWITCH (DRIVER'S SIDE) SIGNAL OR OTHER • Switch the ignition to ON. • Access the BCM PID DRSW_D using the M-MDS. (See PID/DATA MONITOR INSPECTION [BCM].) • Are the DRSW_D PID values congruent with the opening and closing of the driver’s door? (See PID/DATA MONITOR TABLE [BCM].)	Yes	Replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)
No	Go to the next step.
11	INSPECT FRONT DOOR LATCH SWITCH (DRIVER'S SIDE) • Inspect the front door latch switch (driver’s side). (See FRONT DOOR LATCH SWITCH INSPECTION.) • Is there any malfunction?	Yes	Replace the front door latch and lock actuator (driver’s side). (See FRONT DOOR LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)
No	Repair or replace the wiring harness between front door latch switch (driver’s side) and BCM for a possible open circuit.
12*	DETERMINE IF MALFUNCTION CAUSE IS BONNET LATCH SWITCH SIGNAL OR OTHER • Switch the ignition to ON. • Access the BCM PID HOOD_SW using the M-MDS. (See PID/DATA MONITOR INSPECTION [BCM].) • Is the HOOD_SW PID value normal? (See PID/DATA MONITOR TABLE [BCM].)	Yes	Go to Step 14.
No	Go to the next step.
13	INSPECT BONNET LATCH SWITCH • Inspect the bonnet latch switch. (See BONNET LATCH SWITCH INSPECTION.) • Is there any malfunction?	Yes	Replace the bonnet latch switch. (See BONNET LATCH AND RELEASE LEVER REMOVAL/INSTALLATION.)
No	Repair or replace the wiring harness between bonnet latch switch terminal A and BCM terminal 1J for a possible open circuit.
14	DETERMINE IF MALFUNCTION IS CAUSED BY ROUGH IDLING OR A PISTON-STOP POSITION CONTROL MALFUNCTION • Start the engine and warm it up completely. • Is the idle speed regulated?	Yes	Go to the next step.
No	Inspect the following: • Air suction into intake-air system • Vacuum hose leakage • Purge system • Electric variable valve timing system • Hydraulic variable valve timing system ― If there is any malfunction: • Repair or replace the malfunctioning part according to the inspection results.
15	INSPECT GENERATOR CONTROL SYSTEM • Start the engine and warm it up completely. • Access the PCM PID ALTT V using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0].) • Does the ALTT V PID value increase when the rear window defroster, headlights, and blower motor are operated simultaneously?	Yes	Go to the next step.
No	Inspect the generator. (See GENERATOR INSPECTION [SKYACTIV-G 2.0].) • If there is any malfunction: ― Repair or replace the malfunctioning part according to the inspection results.
16	INSPECT CKP SENSOR SIGNAL WAVE • Verify the PCM terminal 1AD output signal wave pattern using an oscilloscope. (See PCM INSPECTION [SKYACTIV-G 2.0].) • Is the output wave pattern normal?	Yes	Go to the next step.
No	Inspect the CKP sensor pulse wheel. (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [SKYACTIV-G 2.0]s.) • If there is any malfunction: ― Replace the crankshaft pulley. (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0].) • If there is no malfunction: ― Replace the CKP sensor. (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)
17	INSPECT DRIVE-BY-WIRE CONTROL SYSTEM OPERATION • Perform the Drive-by-wire Control System Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [SKYACTIV-G 2.0].) • Is the throttle valve operation normal?	Yes	Go to the next step.
No	Repair or replace the malfunctioning part according to the inspection results.
18	INSPECT GENERATOR DRIVE BELT • Inspect the generator drive belt. (See DRIVE BELT INSPECTION [SKYACTIV-G 2.0].) • Does the drive belt auto tensioner indicator mark exceed the limit?	Yes	Replace the generator drive belt. (See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)
No	Replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)
19	Verify the test results. • If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [SKYACTIV-G 2.0].) • 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-G 2.0].)

STEP

INSPECTION

RESULTS

ACTION

VERIFY IF MALFUNCTION CAUSE IS ROUGH ENGINE STARTING

• Start the engine.

• Can the engine be started normally?

Yes

Go to the next step.

Perform the symptom troubleshooting "NO.3 WILL NOT CRANK" or "NO.4 HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK".

(See NO.3 WILL NOT CRANK [SKYACTIV-G 2.0].)

(See NO.4 HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK [SKYACTIV-G 2.0].)

VERIFY DTC

• Retrieve the PCM, BCM, SAS control module, and instrument cluster DTCs using the M-MDS.

(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0].)

(See DTC INSPECTION [BCM].)

(See DTC INSPECTION.)

(See DTC INSPECTION [INSTRUMENT CLUSTER].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [SKYACTIV-G 2.0].)

(See DTC TABLE [BCM].)

(See DTC TABLE.)

(See DTC TABLE [INSTRUMENT CLUSTER].)

Go to the next step.

VERIFY i-stop WARNING LIGHT (AMBER) CONDITION

• Verify that the i-stop warning light (amber) illuminates while driving.

• Does the i-stop warning light (amber) illuminate?

Yes

Go to the next step.

Go to Step 7.

DETERMINE IF MALFUNCTION CAUSE IS i-stop OFF SWITCH SIGNAL OR OTHER

• Measure the voltage at the instrument cluster terminal 1E with the i-stop OFF switch and related wiring harness are shaken.

• Is the voltage normal when the i-stop OFF switch and related wiring harness are shaken?

Yes

Go to Step 6.

Go to the next step.

INSPECT i-stop OFF SWITCH

• Inspect the i-stop OFF switch.

(See i-stop OFF SWITCH INSPECTION [SKYACTIV-G 2.0].)

• Is there any malfunction?

Yes

Replace the i-stop OFF switch.

(See i-stop OFF SWITCH REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

Repair or replace the wiring harness between i-stop OFF switch terminal I and instrument cluster terminal 1E for a possible short to ground.

DETERMINE IF MALFUNCTION CAUSE IS INSTRUMENT CLUSTER WARNING LIGHT ILLUMINATION CIRCUIT OR ERROR SIGNAL FROM PCM

• Switch the ignition to ON.

• Access the instrument cluster PID WL+IL and illuminate and turn off the warning light in the instrument cluster using the M-MDS.

(See ACTIVE COMMAND MODES INSPECTION [INSTRUMENT CLUSTER].)

• Does the i-stop warning light (amber) illuminate or turn off according to the M-MDS operation?

(See ACTIVE COMMAND MODES TABLE [INSTRUMENT CLUSTER].)

Yes

Replace the PCM.

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

Replace the instrument cluster.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

DETERMINE IF MALFUNCTION CAUSE IS DRIVER-SIDE BUCKLE SWITCH SIGNAL OR OTHER

• Does the malfunction occur when the driver's door is opened with the driver-side front seat belt fastened?

Yes

Go to the next step.

Go to Step 9.

INSPECT DRIVER-SIDE BUCKLE SWITCH

• Inspect the driver-side buckle switch.

(See BUCKLE SWITCH INSPECTION.)

• Is there any malfunction?

Yes

Replace the driver-side buckle switch.

(See FRONT BUCKLE REMOVAL/INSTALLATION.)

Repair or replace the wiring harness between driver-side buckle switch terminal A and SAS control module terminal 2U for a possible short to ground.

DETERMINE IF MALFUNCTION CAUSE IS DOOR LATCH SWITCH SIGNAL OR OTHER

• Does the malfunction occur when the driver-side front seat belt is not fastened with the driver's door closed?

Yes

Go to the next step.

Go to Step 12.

DETERMINE IF MALFUNCTION CAUSE IS FRONT DOOR LATCH SWITCH (DRIVER'S SIDE) SIGNAL OR OTHER

• Switch the ignition to ON.

• Access the BCM PID DRSW_D using the M-MDS.

(See PID/DATA MONITOR INSPECTION [BCM].)

• Are the DRSW_D PID values congruent with the opening and closing of the driver’s door?

(See PID/DATA MONITOR TABLE [BCM].)

Yes

Replace the PCM.

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

Go to the next step.

INSPECT FRONT DOOR LATCH SWITCH (DRIVER'S SIDE)

• Inspect the front door latch switch (driver’s side).

(See FRONT DOOR LATCH SWITCH INSPECTION.)

• Is there any malfunction?

Yes

Replace the front door latch and lock actuator (driver’s side).

(See FRONT DOOR LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)

Repair or replace the wiring harness between front door latch switch (driver’s side) and BCM for a possible open circuit.

12*

DETERMINE IF MALFUNCTION CAUSE IS BONNET LATCH SWITCH SIGNAL OR OTHER

• Switch the ignition to ON.

• Access the BCM PID HOOD_SW using the M-MDS.

(See PID/DATA MONITOR INSPECTION [BCM].)

• Is the HOOD_SW PID value normal?

(See PID/DATA MONITOR TABLE [BCM].)

Yes

Go to Step 14.

Go to the next step.

INSPECT BONNET LATCH SWITCH

• Inspect the bonnet latch switch.

(See BONNET LATCH SWITCH INSPECTION.)

• Is there any malfunction?

Yes

Replace the bonnet latch switch.

(See BONNET LATCH AND RELEASE LEVER REMOVAL/INSTALLATION.)

Repair or replace the wiring harness between bonnet latch switch terminal A and BCM terminal 1J for a possible open circuit.

DETERMINE IF MALFUNCTION IS CAUSED BY ROUGH IDLING OR A PISTON-STOP POSITION CONTROL MALFUNCTION

• Start the engine and warm it up completely.

• Is the idle speed regulated?

Yes

Go to the next step.

Inspect the following:

• Air suction into intake-air system

• Vacuum hose leakage

• Purge system

• Electric variable valve timing system

• Hydraulic variable valve timing system

― If there is any malfunction:

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

INSPECT GENERATOR CONTROL SYSTEM

• Start the engine and warm it up completely.

• Access the PCM PID ALTT V using the M-MDS.

(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0].)

• Does the ALTT V PID value increase when the rear window defroster, headlights, and blower motor are operated simultaneously?

Yes

Go to the next step.

Inspect the generator.

(See GENERATOR INSPECTION [SKYACTIV-G 2.0].)

• If there is any malfunction:

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

INSPECT CKP SENSOR SIGNAL WAVE

• Verify the PCM terminal 1AD output signal wave pattern using an oscilloscope.

(See PCM INSPECTION [SKYACTIV-G 2.0].)

• Is the output wave pattern normal?

Yes

Go to the next step.

Inspect the CKP sensor pulse wheel.

(See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [SKYACTIV-G 2.0]s.)

• If there is any malfunction:

― Replace the crankshaft pulley.

(See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

• If there is no malfunction:

― Replace the CKP sensor.

(See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

INSPECT DRIVE-BY-WIRE CONTROL SYSTEM OPERATION

• Perform the Drive-by-wire Control System Inspection.

(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [SKYACTIV-G 2.0].)

• Is the throttle valve operation normal?

Yes

Go to the next step.

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

INSPECT GENERATOR DRIVE BELT

• Inspect the generator drive belt.

(See DRIVE BELT INSPECTION [SKYACTIV-G 2.0].)

• Does the drive belt auto tensioner indicator mark exceed the limit?

Yes

Replace the generator drive belt.

(See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

Replace the PCM.

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

Verify the test results.

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

(See SYMPTOM DIAGNOSTIC INDEX [SKYACTIV-G 2.0].)

• 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-G 2.0].)