NO.4 i-stop FUNCTION DOES NOT OPERATE [SKYACTIV-D 2.2]

id1103a2000900

4

i-stop FUNCTION DOES NOT OPERATE
DESCRIPTION
•  i-stop function does not operate when vehicle is stopped.
POSSIBLE CAUSE
•  The i-stop (engine stop control) permit conditions are not met due to either of the following causes:
―  Driver operation
―  Environment (problem other than with vehicle)
―  i-stop related part malfunction
Note
•  PIDs related to i-stop can be displayed in a list using the M-MDS data monitor diagnostic function.
•  If the engine is stopped by the i-stop control while the following data monitor items on the M-MDS are being viewed, the data monitor items may no longer be displayed.
―  BRAKE_SW
―  BRK_F_P_C
―  LON_ACCL_C
―  WSPD_SEN_LF
―  WSPD_SEN_RF
―  WSPD_SEN_LR
―  WSPD_SEN_RR


i-stop (engine-stop control) permit condition

Determination module

Determination item

Determination condition

Applicable PID

ATX

MTX
PCM
Vehicle speed
0 km/h {0 mph}
3 km/h {2 mph} or less
WSPD_SEN_LF
WSPD_SEN_RF
WSPD_SEN_LR
WSPD_SEN_RR
Brake pedal
Brake pedal is depressed while in D or M position
Not applicable
TR
BOO, BPA
Brake fluid pressure
Brake fluid pressure is 1.7 MPa {17 kgf/cm2, 247 psi} or more while in D or M position (perform correction according to vehicle inclination angle)
Not applicable
TR
BRK_F_P_C
Accelerator pedal
Released
←
APP
Clutch pedal
Not applicable
Released
CPP
MTX gear position
Not applicable
Neutral
CPP/PNP
Vehicle conditions
Vehicle is stopped in D or M position*1, *8
Not applicable
TR
Steering speed
15 deg/s or less
←
STR_ROT_SPD
Steering angle
Within 65° of center to left and right
(After EPS control module learns center value)
Not applicable
STR_AB_EST
Steering torque
1.1 N·m {11 kgf·cm, 9.7 in·lbf} or less
←
STR_TRQ_S_M
i-stop OFF switch
OFF
←
I-Stop_OFF
Vehicle speed history
(After engine started and driven once)
3 km/h {2 mph} or more
4 km/h {2.5 mph} or more
I-Stop_VSP
Battery charge condition
65.7% or more
←
BATT_SOC
Battery fluid temperature
0—70 °C {32—158 °F}
←
BATT_TEMP
Battery voltage
11.2 V or more
←
BATT_V
Power brake unit vacuum
−45 kPa {−0.46 kgf/cm2, −6.5 psi} or less
(value calculated by subtracting BARO from BBP)
←
BBP
BARO
Door (driver's side)
Closed*2
←
DOOR_D
Bonnet
Closed*3
←
HOOD
Vehicle inclination angle
Within ±7° when level (LON_ACCL_C: within ±0.121 G)
Not applicable
LON_ACCL_C
Seat belt (driver's side)
Fastened*4
←
SEAT_B_D
Fast idle increase
Not implemented
←
Not applicable
Diesel particulate filter regeneration
Not implemented
←
Not applicable
Fuel injection amount learning
Not implemented*5
←
Not applicable
Battery condition setting
Completed
←
Not applicable
Steering angle sensor initial setting
Completed
Not applicable
Not applicable
Engine coolant temperature
30—110 °C {86—230 °F}
←
ECT
Intake air temperature
100 °C {212 °F} or less
←
IAT
PCM
Altitude
1,800 m or less (BARO: 81.5 kPa {0.831 kgf/cm2, 11.8 psi} or more)
←
BARO
System condition
i-stop related part DTCs are not recorded
←
Not applicable
Start stop unit
B+ (ROOM fuse) input
Yes
←
VPWR_B1
IG1 input
Yes
←
VPWR_IG1
ACC input
Yes
←
VPWR_ACC
IG1 output
Yes
←
RELAY_IG1
ACC output
Yes
←
RELAY_ACC
Push button
Not pressed
←
SSB_1
SSB_2
Door (all)
Closed
←
DOOR_ALL
Trunk (4SD)/Liftgate (5HB)
Closed
←
TRUNK
Seat belt (driver's side)
Fastened*3
←
SEAT_B_D
Engine start
Engine was started by operating push button with key inside cabin (engine started first time)
←
Not applicable
Engine rotation speed
300 rpm or more is maintained after engine started
←
Not applicable
System condition
i-stop, keyless entry system/advanced keyless entry system, push button start system and immobilizer system related part DTCs are not recorded
←
Not applicable
TCM
TCM detection condition
All met (I-Stop_EST: On)
Not applicable
I-Stop_EST
Panic stop
Brake pedal was not depressed suddenly within 4 s
Not applicable
Not applicable
TFT
20―117 °C {68—242 °F}
Not applicable
TFT
Gear position
Not in 2nd gear fixed mode
Not applicable
Not applicable
System condition
i-stop related part DTCs are not recorded
Not applicable
Not applicable
Climate control unit
Cabin temperature (with full-auto A/C)
Difference between target cabin temperature and actual cabin temperature is a certain value or less
(Cabin temperature control by A/C is normally performed)
←
Not applicable
A/C temperature (with full-auto A/C)
Setting other than MAX/MIN*6
←
Not applicable
Ambient temperature
−10―50 °C {14—122 °F}
←
Not applicable
Warm-up operation condition (with manual A/C)
Ambient temperature is 10 °C {50 °F} or more or engine coolant temperature is 60 °C {140 °F} or more
←
ECT
Humidity
Windshield fogging judgment is standard or more*9
←
Not applicable
Cold condition (with manual A/C)
Ambient temperature is 29 °C {84 °F} or less and evaporator temperature is 9 °C {48 °F} or less
←
Not applicable
DEFROSTER switch (with full-auto A/C)
OFF
←
DEF_SW
MODE dial (with manual A/C)
Except DEFROSTER
←
Not applicable
Airflow volume control dial (with full-auto air conditioner system)
Except MAX setting*7
←
Not applicable
System condition
i-stop related part DTCs are not recorded
←
Not applicable
DSC HU/CM
Operation request from PCM
Hill Launch Assist (HLA) control request signal from PCM is received
Not applicable
Not applicable
Wheel speed (4 wheels)
0 km/h {0 mph}
Not applicable
WSPD_SEN_LF
WSPD_SEN_RF
WSPD_SEN_LR
WSPD_SEN_RR
Brake pedal
Brake pedal is depressed
Not applicable
BRAKE_SW
Brake fluid pressure
Approx. 0.5 MPa {5 kgf/cm2, 73 psi} or more
Not applicable
BRK_F_P_C
Accelerator pedal
Released
Not applicable
APP
System condition
i-stop related part DTCs are not recorded
Not applicable
Not applicable

*1  :After the vehicle is stopped, the engine stops if the gear is shifted to N position. In addition, if the gear is shifted to P position after the vehicle is stopped in D position, the engine stop condition by the i-stop control is maintained.
*2  :If a door is opened while the vehicle is stopped, i-stop is inhibited until a vehicle speed record is input once.
*3  :If the engine is started with the bonnet open, i-stop is inhibited until the engine is stopped.
*4  :If the seat belt is unfastened while the vehicle is stopped, i-stop is inhibited until a vehicle speed record is input once.
*5  :If the fuel injection amount learning, which is periodically performed automatically, is not completed, the PCM turns the i-stop indicator light (green) off and inhibits i-stop when the vehicle speed is approx. 10 km/h {6.2 mph} or less before the vehicle stops.
*6  :When the A/C set temperature is set to MAX, the PCM may inhibit the i-stop control.
*7  :When all of the other i-stop permit conditions related to the climate control unit are met even if the airflow volume control dial is on, the i-stop control is permitted.
*8  :When shifting to the R position and driving the vehicle, the i-stop function is inhibited until the vehicle is driven at 5 km/h {3.0 mph} or more for 1 min or more after shifting to the D or M position.
*9  :The windshield fogging judgment is performed by adding the correction value calculated from each signal to the signal from the humidity sensor.

Diagnostic Procedure

Step

Inspection

Results

Action
1
VERIFY DTCs
•  Using the M-MDS, display the DTCs related to the PCM, TCM, DSC HU/CM, climate control unit, and start stop unit.
•  Is a DTC displayed?
Yes
Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [PCM (SKYACTIV-D 2.2)].)
(See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (GW6A-EL)].)
(See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
(See DTC TABLE [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)
(See DTC TABLE [START STOP UNIT].)
No
Go to the next step.
2
VERIFY i-STOP (ENGINE-STOP CONTROL) PERMIT CONDITION ITEMS
Warning
•  To prevent an accident, work with two people when the vehicle is being driven (one person drives vehicle, other person operates M-MDS).
•  Observe legal speed limits when driving the vehicle and perform the procedure in a location where safety can be assured.
•  Switch the ignition ON (engine off).
•  Display the PID related to the i-stop (engine-stop control) permit conditions using the M-MDS.
•  Drive the vehicle.
•  Verify if the i-stop (engine-stop control) permit conditions of the items which can be verified by the PID are met.
•  Are the permit conditions of all the items met?
Yes
Go to the next step.
No
Inspect the applicable items for Inspection item(s).
3
VERIFY VEHICLE CONDITION RELATED TO i-STOP (ENGINE-STOP CONTROL) PERMIT CONDITION
•  Verify if all the following vehicle conditions are met.
―  Engine starts by operating push button with key left in vehicle
―  Brake pedal not depressed suddenly
―  Gear position: Not in 2nd gear fixed mode
•  Are all the conditions met?
Yes
Go to the next step.
No
Verify the i-stop (engine-stop control) permit condition, then go to Step 11.
4
PERFORM BATTERY CONDITION INITIAL SETTING (i-STOP SETTING)
•  Perform the battery condition initial setting (i-stop setting).
•  Drive the vehicle to verify the i-stop operation condition.
•  Is engine-stopping by i-stop operable?
Yes
Go to Step 11.
No
Go to the next step.
5
INSPECT AMBIENT TEMPERATURE SENSOR FOR MALFUNCTION
•  Inspect the ambient temperature sensor.
•  Is the ambient temperature sensor normal?
Yes
Go to the next step.
No
Replace the ambient temperature sensor, then go to Step 11.
(See AMBIENT TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
(See AMBIENT TEMPERATURE SENSOR REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER].)
6
INSPECT EVAPORATOR TEMPERATURE SENSOR FOR MALFUNCTION
•  Inspect the evaporator temperature sensor.
•  Is the evaporator temperature sensor normal?
Yes
Vehicles with full-auto A/C
•  Go to the next step.
Vehicles with manual A/C
•  Go to Step 10.
No
Replace the evaporator temperature sensor, then go to Step 11.
(See EVAPORATOR TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
(See EVAPORATOR TEMPERATURE SENSOR REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER].)
7
INSPECT CABIN TEMPERATURE SENSOR FOR MALFUNCTION
•  Inspect the cabin temperature sensor.
•  Is the cabin temperature sensor normal?
Yes
Go to the next step.
No
Replace the cabin temperature sensor, then go to Step 11.
(See CABIN TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
8
DETERMINE IF MALFUNCTION CAUSED BY AIR MIX ACTUATOR MALFUNCTION
•  Inspect the air mix actuator.
•  Is the air mix actuator normal?
Yes
Inspect the air mix door and linkage for sticking.
(See A/C UNIT DISASSEMBLY/ASSEMBLY.)
•  If the steering switch is normal:
―  Go to the next step.
•  If there is any malfunction:
―  Repair or replace the malfunctioning location, then go to Step 11.
No
Replace the air mix actuator, then go to Step 11.
(See AIR MIX ACTUATOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
9
DETERMINE IF MALFUNCTION CAUSED BY AIRFLOW MODE ACTUATOR MALFUNCTION
•  Inspect the airflow mode actuator.
•  Is the airflow mode actuator normal?
Yes
Go to the next step.
No
Replace the airflow mode actuator, then go to Step 11.
(See AIRFLOW MODE ACTUATOR REMOVAL [FULL-AUTO AIR CONDITIONER].)
(See AIRFLOW MODE ACTUATOR INSTALLATION [FULL-AUTO AIR CONDITIONER].)
10
INSPECT EPS CONTROL MODULE FOR MALFUNCTION
•  Inspect the EPS control module.
•  Is the EPS control module normal?
Yes
Perform the following procedures, then go to the next step.
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 on a straight road for 10 m {33 ft} or more at a speed of 10 km/h {6.2 mph} or more.
3.  Stop the vehicle with the wheels in the straight-ahead position.
No
Replace the EPS control module, then go to the next step.
(See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.)
11
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Has the malfunction symptom been eliminated?
Yes
Complete the symptom troubleshooting. (Explain contents of repair to customer)
No
Repeat the inspection from Step 1.