Diagnostic Procedure

I-STOP FUNCTION OPERATES UNDER NO ENGINE-STOP CONDITIONS (SKYACTIV-G VIN Y) DIAGNOSTIC PROCEDURE

Step	Inspection	Results	Action
1	VERIFY DTC Perform the DTC inspection for the following modules. (See DTC INSPECTION .) PCM TCM DSC HU/Control Module Dash-electrical supply unit SAS control module Body control module (BCM) Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-G VIN Y)] .) (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (GW6AX-EL)] .) (See DTC TABLE [DSC HU/Control Module] .) (See DTC TABLE [DASH-ELECTRICAL SUPPLY UNIT] .) (See DTC TABLE [SAS CONTROL MODULE (TWO-STEP DEPLOYMENT CONTROL SYSTEM - US/CANADA SPEC.)] .) (See DTC TABLE [BODY CONTROL MODULE (BCM)] .)
1		No	Go to the next step.
2	DETERMINE INSPECTION LOCATION ACCORDING TO MALFUNCTION SYMPTOM If i-stop function operates even though the i-stop warning light (amber) is turned on: Go to the next step. If i-stop function operates even though the i-stop OFF switch is turned on: Go to Step 4. If i-stop function operates (i-stop function operates while parking vehicle in a garage) even though the steering wheel is being operated: Go to Step 6. If i-stop function operates even though the brake pedal is not depressed while the vehicle is stopped: Go to Step 7 If i-stop function operates even though the hood is open: Go to Step 9 If i-stop function operates even though the doors, liftgate is opened: Go to Step 11. If i-stop function operates even though the seat belt is not fastened: Go to Step 14. If i-stop function operates even though there is a steep slope: Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW .) If the CAN communication is normal, repeat the inspection from Step 1. If the malfunction recurs, replace the SAS control module, then perform the repair completion verification. (See SAS CONTROL MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM - US/CANADA SPEC.] .) If i-stop function operates even though the ambient temperature is outside of the operation range: Go to Step 16. If i-stop function operates even though the cabin temperature is outside of the operation range: Go to Step 19. If i-stop function operates even though the A/C output is high: Go to Step 22.
3	DETERMINE IF MALFUNCTION CAUSE IS CAN COMMUNICATION LINE BETWEEN INSTRUMENT CLUSTER AND PCM OR OTHER Access the instrument cluster PID [I-STOP_OFF_SW] during an engine stop by the i-stop control using the M-MDS. (See PID/DATA MONITOR INSPECTION .) (See PID/DATA MONITOR TABLE [INSTRUMENT CLUSTER] .) Is the PID value "off"?	Yes	i-stop warning light (amber) illumination circuit malfunction in instrument cluster can be considered. Replace the instrument cluster and perform the repair completion verification. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
3		No	Malfunction in CAN communication circuit between instrument cluster and PCM can be considered. Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW .) Repair or replace the malfunctioning location and perform the repair completion verification.
4	INSPECT i-stop OFF SWITCH FOR MALFUNCTION Inspect the applicable part. (See i-stop OFF SWITCH INSPECTION .) Is the part normal?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See CLUSTER SWITCH REMOVAL/INSTALLATION .)
5	INSPECT i-stop OFF SWITCH SIGNAL CIRCUIT FOR SHORT CIRCUIT AND OPEN CIRCUIT Inspect the applicable circuit for a short circuit and open circuit. (See CIRCUIT INSPECTION .) Is the circuit normal?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW .) If the CAN communication is normal, repeat the inspection from Step 1. If the malfunction recurs, replace the instrument cluster, then perform the repair completion verification. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
5		No	Repair or replace the malfunctioning location and perform the repair completion verification.
6	INSPECT EPS CONTROL MODULE FOR MALFUNCTION Inspect the applicable part. (See EPS CONTROL MODULE INSPECTION .) Is the part normal?	Yes	Perform the following procedure: Switch the ignition off, and after 2 min or more have elapsed, switch the ignition ON. Start the engine and drive the vehicle 10 m {32 ft 10 in} or more in a straight line at a speed of 10 km/h {6.2 mph} or more. Stop the vehicle with the wheels in the straight-ahead position. Access the EPS control module PID [STR_ANG] using the M-MDS. (See PID/DATA MONITOR INSPECTION .) If the [STR_ANG] value is normal, perform the repair completion verification. (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 perform the repair completion verification. (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION .)
6		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION .)
7	INSPECT POWER BRAKE UNIT VACUUM SENSOR FOR MALFUNCTION Inspect the applicable part. (See POWER BRAKE UNIT VACUUM SENSOR INSPECTION .) Is the part normal?	Yes	Go to the next step.
7		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See POWER BRAKE UNIT VACUUM SENSOR REMOVAL/INSTALLATION .)
8	INSPECT POWER BRAKE UNIT VACUUM SENSOR POWER SUPPLY CIRCUIT, SIGNAL CIRCUIT, AND GROUND CIRCUIT FOR SHORT CIRCUIT AND OPEN CIRCUIT Inspect the applicable circuit for a short circuit and open circuit. (See CIRCUIT INSPECTION .) Is the circuit normal?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW .) If the CAN communication is normal, repeat the inspection from Step 1. If the malfunction recurs, replace the DSC HU/Control Module, then perform the repair completion verification. (See DSC HU/Control Module REMOVAL/INSTALLATION .)
8		No	Repair or replace the malfunctioning location and perform the repair completion verification.
9	INSPECT HOOD LATCH SWITCH FOR MALFUNCTION Inspect the applicable part. (See HOOD LATCH SWITCH INSPECTION .) Is the part normal?	Yes	Go to the next step.
9		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See HOOD RELEASE LEVER AND RELEASE CABLE REMOVAL/INSTALLATION .)
10	INSPECT HOOD LATCH SWITCH SIGNAL CIRCUIT FOR SHORT TO GROUND Inspect the applicable circuit for a short to ground. (See CIRCUIT INSPECTION .) Is the circuit normal?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW .) If the CAN communication is normal, repeat the inspection from Step 1. If the malfunction recurs, replace the body control module (BCM), then perform the repair completion verification. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION .)
10		No	Repair or replace the malfunctioning location and perform the repair completion verification.
11*	INSPECT DOOR LATCH SWITCH AND LIFTGATE LATCH SWITCH FOR MALFUNCTION Switch the ignition ON (engine off). Access the following body control module (BCM) PIDs using the M-MDS: (See PID/DATA MONITOR INSPECTION .) (See PID/DATA MONITOR TABLE [BODY CONTROL MODULE (BCM)] .) DOOR_SW_ALL (all door latch switches) DOOR_SW_D (driver-side door latch switch) DOOR_SW_P (passenger-side door latch switch) DOOR_SW_L/R (rear door latch switch (LH)) DOOR_SW_R/R (rear door latch switch (RH)) T/LGT_SW (liftgate latch switch) Inspect the switch which the open/close operation of the doors, liftgate is not in conjunction with the PID value. (See FRONT DOOR LATCH AND LOCK ACTUATOR INSPECTION .) (See REAR DOOR LATCH AND LOCK ACTUATOR INSPECTION .) (See LIFTGATE LATCH AND LOCK ACTUATOR INSPECTION .) Is the part normal?	Yes	If [DOOR_SW_ALL], [DOOR_SW_D], [DOOR_SW_P], [DOOR_SW_L/R], or [DOOR_SW_R/R] PID has a malfunction: Go to the next step. If [T/LGT_SW] PID has a malfunction: Go to Step 13.
11*		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See FRONT DOOR LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION .) (See REAR DOOR LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION .) (See LIFTGATE LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION .)
12	INSPECT DOOR LATCH SWITCH SIGNAL CIRCUIT FOR SHORT TO GROUND Inspect the PID-related switch circuit in which the malfunction occurred in Step 11 for a short to ground. (See CIRCUIT INSPECTION .) Is the circuit normal?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW .) If the CAN communication is normal, repeat the inspection from Step 1. If the malfunction recurs, replace the door-electrical supply unit, electrical supply unit (ESU), or body control module (BCM) then perform the repair completion verification. (See DOOR-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION .) (See ELECTRICAL SUPPLY UNIT (ESU) REMOVAL/INSTALLATION .) (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION .)
12		No	Repair or replace the malfunctioning location and perform the repair completion verification.
13	INSPECT LIFTGATE LATCH SWITCH SIGNAL CIRCUIT FOR OPEN CIRCUIT Inspect the applicable circuit for an open circuit. (See CIRCUIT INSPECTION .) Is the circuit normal?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW .) If the CAN communication is normal, repeat the inspection from Step 1. If the malfunction recurs, replace the electrical supply unit (ESU), then perform the repair completion verification. (See ELECTRICAL SUPPLY UNIT (ESU) REMOVAL/INSTALLATION .)
13		No	Repair or replace the malfunctioning location and perform the repair completion verification.
14	INSPECT DRIVER-SIDE BUCKLE SWITCH FOR MALFUNCTION Inspect the applicable part. (See BUCKLE SWITCH INSPECTION .) Is the part normal?	Yes	Go to the next step.
14		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See FRONT BUCKLE REMOVAL/INSTALLATION .)
15	INSPECT DRIVER-SIDE BUCKLE SWITCH SIGNAL CIRCUIT FOR OPEN CIRCUIT Inspect the applicable circuit for an open circuit. (See CIRCUIT INSPECTION .) Is the circuit normal?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW .) If the CAN communication is normal, repeat the inspection from Step 1. If the malfunction recurs, replace the dash-electrical supply unit, then perform the repair completion verification. (See DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .)
15		No	Repair or replace the malfunctioning location and perform the repair completion verification.
16	INSPECT AMBIENT TEMPERATURE SENSOR FOR MALFUNCTION Inspect the applicable part. (See AMBIENT TEMPERATURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER] .) Is the part normal?	Yes	Go to the next step.
16		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See AMBIENT TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .)
17	INSPECT AMBIENT TEMPERATURE SENSOR SIGNAL CIRCUIT FOR SHORT CIRCUIT AND OPEN CIRCUIT Inspect the applicable circuit for a short circuit and open circuit. (See CIRCUIT INSPECTION .) Is the circuit normal?	Yes	Go to the next step.
17		No	Repair or replace the malfunctioning location and perform the repair completion verification.
18	INSPECT AMBIENT TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT Inspect the applicable circuit for an open circuit. (See CIRCUIT INSPECTION .) Is the circuit normal?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW .) If the CAN communication is normal, repeat the inspection from Step 1. If the malfunction recurs, replace the PCM, then perform the repair completion verification. (See PCM REMOVAL/INSTALLATION .)
18		No	Repair or replace the malfunctioning location and perform the repair completion verification.
19	INSPECT PASSENGER COMPARTMENT TEMPERATURE SENSOR FOR MALFUNCTION Inspect the applicable part. (See PASSENGER COMPARTMENT TEMPERATURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER] .) Is the part normal?	Yes	Go to the next step.
19		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See PASSENGER COMPARTMENT TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .)
20	INSPECT PASSENGER COMPARTMENT TEMPERATURE SENSOR SIGNAL CIRCUIT FOR SHORT CIRCUIT AND OPEN CIRCUIT Inspect the applicable circuit for a short circuit and open circuit. (See CIRCUIT INSPECTION .) Is the circuit normal?	Yes	Go to the next step.
20		No	Repair or replace the malfunctioning location and perform the repair completion verification.
21	INSPECT PASSENGER COMPARTMENT TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT Inspect the applicable circuit for an open circuit. (See CIRCUIT INSPECTION .) Is the circuit normal?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW .) If the CAN communication is normal, repeat the inspection from Step 1. If the malfunction recurs, replace the climate control unit, then perform the repair completion verification. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .)
21		No	Repair or replace the malfunctioning location and perform the repair completion verification.
22	INSPECT DRIVER-SIDE AIR MIX ACTUATOR FOR MALFUNCTION Inspect the applicable part. (See AIR MIX ACTUATOR INSPECTION [FULL-AUTO AIR CONDITIONER] .) Is the part normal?	Yes	Inspect the air mix door and linkage for sticking. (See A/C UNIT DISASSEMBLY/ASSEMBLY .) If there is no malfunction: Go to the next step. If there is any malfunction: Repair or replace the malfunctioning location and perform the repair completion verification.
22		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See AIR MIX ACTUATOR REMOVAL [FULL-AUTO AIR CONDITIONER] .) (See AIR MIX ACTUATOR INSTALLATION [FULL-AUTO AIR CONDITIONER] .)
Repair completion verification 1	VERIFY THAT VEHICLE IS REPAIRED Install/connect the part removed/disconnected during the troubleshooting procedure. Has the malfunction symptom been eliminated?	Yes	Complete the symptom troubleshooting. (Explain contents of repair to customer)
Repair completion verification 1		No	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW .) If the CAN communication is normal, perform the diagnosis from Step 1. If the malfunction recurs, go to the next step.
Repair completion verification 2	VERIFY IF MALFUNCTION IS CAUSED BY NOT PERFORMING PCM REPROGRAMMING Verify repair information and verify that there is a new calibration in the PCM. Is there a new calibration in the PCM?	Yes	Perform the PCM reprogramming and verify if the malfunction symptom was corrected. If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION .)
Repair completion verification 2		No	Replace the PCM. (See PCM REMOVAL/INSTALLATION .)