NO.4 i-stop FUNCTION DOES NOT OPERATE [SKYACTIV-G 2.0, SKYACTIV-G 2.5]
id1103a5000900
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4 |
i-stop FUNCTION DOES NOT OPERATE |
|---|---|
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DESCRIPTION
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• i-stop function does not operate when vehicle is stopped.
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POSSIBLE CAUSE
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• The i-stop (engine stop control) permit conditions are not met due to either of the following causes:
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i-stop (engine-stop control) permit condition
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Determination module |
Determination item |
Determination condition |
Applicable PID |
Inspection item(s) |
|
|---|---|---|---|---|---|
|
ATX |
MTX |
||||
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PCM
|
Vehicle speed
|
0 km/h {0 mph}
|
3 km/h {2 mph} or less
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WSPD_SEN_LF
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• Front ABS wheel-speed sensor
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WSPD_SEN_RF
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|||||
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WSPD_SEN_LR
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• Rear ABS wheel-speed sensor
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||||
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WSPD_SEN_RR
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|||||
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Brake pedal
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Brake pedal is depressed while in D or M position
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Not applicable
|
TR
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• Transaxle range sensor
|
|
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BPA
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• Brake switch
(See BRAKE SWITCH INSPECTION.)
|
||||
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Brake fluid pressure
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Brake fluid pressure is 1.35 MPa {13.8 kgf/cm2, 196 psi} or more while in D or M position (perform correction according to vehicle inclination angle)
|
Not applicable
|
TR
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• Transaxle range sensor
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|
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BRK_F_P_C
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• Brake fluid pressure sensor
|
||||
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PCM
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Accelerator pedal
|
Released
|
←
|
APP
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• Accelerator pedal position sensor
|
|
Clutch pedal
|
Not applicable
|
Released
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CPP
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• Clutch stroke sensor
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|
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MTX gear position
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Not applicable
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Neutral
|
CPP/PNP
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• Neutral switch
|
|
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Vehicle conditions
|
Vehicle is stopped in D position*1
|
Not applicable
|
TR
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• Transaxle range sensor
|
|
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Steering speed
|
15 deg/s or less
|
←
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STR_ROT_SPD
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• EPS control module
|
|
|
Steering angle
|
Within 65° of center to left and right
(After EPS control module learns center value)
|
Not applicable
|
Not applicable
|
Not applicable
|
|
|
Steering torque
|
1.1 N·m {11 kgf·cm, 9.7 in·lbf} or less
|
←
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STR_TRQ_S_M
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• EPS control module
|
|
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i-stop OFF switch
|
OFF
|
←
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I-Stop_OFF
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• i-stop OFF switch
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|
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Vehicle speed history
(After engine started and driven once)
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3 km/h {2 mph} or more
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4 km/h {2.5 mph} or more
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I-Stop_VSP
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• PCM
|
|
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PCM
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DC-DC converter (i-ELOOP) output current
|
25 A or less
|
←
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DCDC_OUT_I
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• DC-DC converter (i-ELOOP)
|
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i-ELOOP bypass mode operation condition
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Bypass mode is not operated (BYPS_STAT: Bypass Off)
|
←
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BYPS_STAT
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• DC-DC converter (i-ELOOP)
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|
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Capacitor voltage
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14 V or more
|
←
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DCDC_IN_V
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• DC-DC converter (i-ELOOP)
|
|
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Battery charge condition
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65.72 % or more
|
←
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BATT_SOC
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• Current sensor
• Battery
|
|
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Battery fluid temperature
|
0—70 °C {32—158 °F}
|
←
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BATT_TEMP
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• Current sensor
• Battery
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|
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Battery voltage
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11.2 V or more
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←
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BATT_V
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• Current sensor
• Battery
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PCM
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Power brake unit vacuum
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-45 kPa {-0.46 kgf/cm2, -6.5 psi} or less
(value calculated by subtracting BARO from BBP)
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←
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BBP
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• Power brake unit vacuum sensor
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BARO
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• BARO sensor
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||||
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Door (driver's side)
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Closed
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←
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DOOR_D
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• Front door latch switch (RH)
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|
|
Hood
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Closed *2
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←
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HOOD
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• Hood latch switch
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|
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Vehicle inclination angle
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Within ±7° when level (LON_ACCL_C: within ±0.121 G)
|
Not applicable
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LON_ACCL_C
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• SAS control module
(See DTC INSPECTION.)
|
|
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Seat belt (driver's side)
|
Fastened*3
|
←
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SEAT_B_D
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• Driver-side buckle switch
(See BUCKLE SWITCH INSPECTION.)
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|
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Battery condition setting
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Completed
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←
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Not applicable
|
Not applicable
|
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Steering angle sensor initial setting
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Completed
|
Not applicable
|
Not applicable
|
Not applicable
|
|
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Engine coolant temperature
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55—110 °C {55—230 °F}
|
←
|
ECT
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• Engine coolant temperature sensor
|
|
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Intake air temperature
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100 °C {212 °F} or less
|
←
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IAT
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• IAT sensor No.1
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|
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PCM
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Altitude
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European (L.H.D U.K.) specs.
• 1,800 m or less (BARO: 84.6 kPa {0.863 kgf/cm2, 12.3 psi} or more)
Except for European (L.H.D U.K.) specs.
• 1,500 m or less (BARO: 81.5 kPa {0.831 kgf/cm2, 11.8 psi} or more)
|
←
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BARO
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• BARO sensor
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System condition
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i-stop related part DTCs are not recorded
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←
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Not applicable
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Not applicable
|
|
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Start stop unit
|
+B (ROOM fuse) input
|
Yes
|
←
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VPWR_B1
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• Start stop unit
(See START STOP UNIT INSPECTION.)
• Battery
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IG1 input
|
Yes
|
←
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VPWR_IG1
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• Start stop unit
(See START STOP UNIT INSPECTION.)
• IG1 relay
• Battery
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|
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ACC input
|
Yes
|
←
|
VPWR_ACC
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• Start stop unit
(See START STOP UNIT INSPECTION.)
• ACC relay
• Battery
|
|
|
IG1 output
|
Yes
|
←
|
RELAY_IG1
|
• IG1 relay
(See RELAY INSPECTION.)
|
|
|
IG2 output
|
Yes
|
←
|
RELAY_IG2
|
• IG2 relay
(See RELAY INSPECTION.)
|
|
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ACC output
|
Yes
|
←
|
RELAY_ACC
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• ACC relay
(See RELAY INSPECTION.)
|
|
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Push button
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Not pressed
|
←
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SSB_1
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• Push button start
(See PUSH BUTTON START INSPECTION.)
|
|
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SSB_2
|
|||||
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Door (all)
|
Closed
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←
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DOOR_ALL
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• Door latch switch
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|
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Start stop unit
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Trunk (4SD)/Liftgate (WGN)
|
Closed
|
←
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TRUNK
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• Trunk lid latch switch (4SD)
• Liftgate latch switch (WGN)
|
|
Seat belt (driver's side)
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Fastened*3
|
←
|
SEAT_B_D
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• Driver-side buckle switch
(See BUCKLE SWITCH INSPECTION.)
|
|
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Engine start
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Engine was started by operating push button with key inside cabin (engine started first time)
|
←
|
Not applicable
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Not applicable
|
|
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Engine rotation speed
|
300 rpm or more is maintained after engine started
|
←
|
Not applicable
|
Not applicable
|
|
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System condition
|
i-stop related part DTCs are not recorded
|
←
|
Not applicable
|
Not applicable
|
|
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TCM
|
TCM detection condition
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All met (I-Stop_EST: On)
|
Not applicable
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I-Stop_EST
|
|
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Panic stop
|
Brake pedal was not depressed suddenly within 4 s
|
Not applicable
|
Not applicable
|
Not applicable
|
|
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TFT
|
20―117 °C {68—242 °F}
|
Not applicable
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TFT
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• TFT sensor
|
|
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Gear position
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Not in 2nd gear fixed mode
|
Not applicable
|
Not applicable
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Not applicable
|
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System condition
|
i-stop related part DTCs are not recorded
|
Not applicable
|
Not applicable
|
Not applicable
|
|
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Climate control unit
|
Climate control unit determination condition
|
With full-auto A/C
• All met
(STOP_ST: Available)
With manual A/C
• All met
|
←
|
With full-auto A/C
• STOP_ST
With manual A/C
• Not applicable
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• 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
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Not applicable
|
|
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Climate control unit
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A/C temperature (with full-auto A/C)
|
Setting other than MAX/MIN
|
←
|
Not applicable
|
Not applicable
|
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Ambient temperature
|
-10―50 °C {14—122 °F}
|
←
|
Not applicable
|
Not applicable
|
|
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Warm-up operation condition (with manual A/C)
|
Ambient temperature is 10 °C {50 °F} or more and engine coolant temperature is 60 °C {140 °F} or more
|
←
|
ECT
|
• Engine coolant temperature sensor
|
|
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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
|
Not applicable
|
|
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Front defroster switch
|
OFF
|
←
|
Not applicable
|
Not applicable
|
|
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System condition
|
i-stop related part DTCs are not recorded
|
←
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Not applicable
|
Not applicable
|
|
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DSC HU/CM
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Operation request from PCM
|
Hill Launch Assist (HLA) control request signal from PCM is received
|
Not applicable
|
Not applicable
|
Not applicable
|
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Vehicle inclination angle
|
Inclination is within ±6° with shift positioned in D/M/R or N/P (LON_ACCL_C: within ±0.104 G)
|
Not applicable
|
TR
|
• Transaxle range sensor
(See .)
|
|
|
LON_ACCL_C
|
• SAS control module
(See DTC INSPECTION.)
|
||||
|
Wheel speed (4 wheels)
|
0 km/h {0 mph}
|
Not applicable
|
WSPD_SEN_LF
|
• Front ABS wheel-speed sensor
|
|
|
WSPD_SEN_RF
|
|||||
|
WSPD_SEN_LR
|
• Rear ABS wheel-speed sensor
|
||||
|
WSPD_SEN_RR
|
|||||
|
Brake pedal
|
Brake pedal is depressed
|
Not applicable
|
BRAKE_SW
|
• Brake switch
(See BRAKE SWITCH INSPECTION.)
|
|
|
Brake fluid pressure
|
Approx. 0.45 MPa {4.6 kgf/cm2, 65 psi} or more
|
Not applicable
|
BRK_F_P_C
|
• Brake fluid pressure sensor
|
|
|
DSC HU/CM
|
Accelerator pedal
|
Released
|
Not applicable
|
APP
|
• Accelerator pedal position sensor
|
|
System condition
|
i-stop related part DTCs are not recorded
|
Not applicable
|
Not applicable
|
Not applicable
|
|
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.
|
|
No
|
Go to the next step.
|
||
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2
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VERIFY i-STOP (ENGINE-STOP CONTROL) PERMIT CONDITION ITEMS
• 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.
|
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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.
• 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.
|
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No
|
Replace the ambient temperature sensor, then go to Step 11.
|
||
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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.
|
||
|
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.
|
||
|
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.
• If the steering switch is normal:
• If there is any malfunction:
|
|
No
|
Replace the air mix actuator, then go to Step 11.
|
||
|
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.
|
||
|
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 (LOCK), and after 2 min or more have elapsed, switch the ignition ON.
2. Start the engine and drive the vehicle on a straight road at 10 km/h or more for 10 m 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.
|
||
|
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.
|