NO.6 ENGINE DOES NOT RESTART [SKYACTIV-D 2.2]
id1103a2001100
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6 |
ENGINE DOES NOT RESTART |
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DESCRIPTION
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• The i-stop warning light (amber) illuminates and engine does not restart while the i-stop function is operating.
• Engine does not restart when attempting to resume driving vehicle after stopping, and i-stop warning light (amber) is illuminated.
• Engine does not restart even though restart conditions are met.
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POSSIBLE CAUSE
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• Engine does not crank when engine restart is initiated
• i-stop (engine stop control) permit conditions are not met due to either of the following causes:
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Engine restart control
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Detection module |
Detection item |
Determination conditions |
PID |
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PCM
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Vehicle speed
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1 km/h {0.6 mph} or more
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WSPD_SEN_LF
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WSPD_SEN_RF
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WSPD_SEN_LR
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WSPD_SEN_RR
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Brake pedal
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• Brake pedal is released → depressed while in P or N position
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TR
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BOO , BPA
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Brake fluid pressure
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Brake fluid pressure is 0.35 MPa {3.6 kgf/cm2, 51 psi} or less while in D or M position
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TR
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BRK_F_P_C
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Accelerator pedal
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Accelerator pedal is depressed while in D or M position
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TR
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APP
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Steering torque
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4 N·m {41 kgf·cm, 35 in·lbf} or more while in D or M position
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STR_TRQ_S_M
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Steering angle
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70° or more from center while in D or M position
(After EPS control module learns center value)
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Not applicable
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Shift operation
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Operated from P or N position to D, M, or R position
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TR
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i-stop OFF switch
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ON
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I-Stop_OFF
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Battery charge condition
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65.7 % or less
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BATT_SOC
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Power brake unit vacuum
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-43 KPa {-0.44 kgf/cm2, -6.2 psi} or more
(value calculated by subtracting BARO from BBP)
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BBP
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BARO
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Driver not seated
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• When any of the following conditions is met:
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SEAT_B_D
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DOOR_D
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TR
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Engine stop period by i-stop
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120 s or more
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Not applicable
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Engine coolant temperature
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23.5 °C {74.3 °F} or less
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ECT
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Fuel pressure
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15 MPa {153 kgf/cm2, 2176 psi} or less
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FRP
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System condition
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An i-stop related part DTC is recorded
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Not applicable
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Start stop unit
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+B (ROOM fuse) input
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No
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VPWR_B1
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Remote transmitter authorization
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When engine restart by remote transmitter authorization is requested
• Any door is open without remote transmitter left in vehicle
• Remote transmitter is outside of vehicle after any door is opened
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Not applicable
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System condition
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An i-stop related part DTC is recorded
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Not applicable
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TCM
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Gear position
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Not in 2nd gear fixed mode
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Not applicable
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TFT
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20 °C {68 °F} or less, or 117°C {243 °F} or more
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TFT
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Vehicle speed
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3 km/h {2 mph} or more
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WSPD_SEN_LF
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WSPD_SEN_RF
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WSPD_SEN_LR
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WSPD_SEN_RR
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System condition
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An i-stop related part DTC is recorded
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Not applicable
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Climate control unit
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Cabin temperature
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Difference between target cabin temperature and actual cabin temperature is a certain value or more
(Cabin temperature control by A/C is normally performed)
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STOP_ST
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A/C set temperature
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• If any one of the following conditions is met:
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Not applicable
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Ambient temperature
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-10 °C {14 °F} or less, or 50 °C {122 °F} or more
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Not applicable
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DEFROSTER switch
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ON
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DEF_SW
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Airflow volume control dial
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MAX setting
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Not applicable
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System condition
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An i-stop related part DTC is recorded
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Not applicable
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DSC HU/CM
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System condition
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An i-stop related part DTC is recorded
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Not applicable
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Diagnostic Procedure
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Step |
Inspection |
Results |
Action |
|---|---|---|---|
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1
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VERIFY ENGINE CRANKING OCCURRENCE
• Start the engine.
• Does the engine start?
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Yes
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Go to the next step.
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No
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Perform symptom troubleshooting according to NO.9 WILL NOT CRANK and NO.12 CRANKS NORMALLY BUT WILL NOT START.
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2
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VERIFY DTCs
• Using the M-MDS, display the DTCs for the PCM, TCM, DSC HU/CM, front climate control unit, and start stop unit.
(See START STOP UNIT INSPECTION.)
• Is a DTC displayed?
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Yes
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Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [START STOP UNIT].)
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No
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Go to the next step.
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3
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VERIFY i-STOP (ENGINE RESTART CONTROL) PERMISSION CONDITION ITEM
• Switch the ignition ON (engine off).
• Display the PID items related to i-stop using the M-MDS.
• Drive the vehicle and perform engine stopping by i-stop.
• Verify if the i-stop (engine restart control) permit conditions of the items which can be verified by the PID are met.
• Are the permit conditions of all the items met?
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Yes
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Go to the next step.
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No
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For the applicable items, inspect the parts under Inspection Item(s).
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4
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VERIFY VEHICLE CONDITIONS RELATED TO i-STOP (ENGINE RESTART CONTROL) PERMISSION CONDITIONS
• Drive the vehicle and perform engine stopping by i-stop.
• Verify that the engine restarts when any of the following conditions is met:
• Does the engine restart?
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Yes
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Verify the i-stop (engine restart control) permission conditions, then go to Step 11.
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No
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Go to the next step.
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5
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INSPECT AMBIENT TEMPERATURE SENSOR FOR MALFUNCTION
• Inspect the ambient temperature sensor.
• Is the ambient temperature sensor normal?
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Yes
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Go to the next step.
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No
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Replace the ambient temperature sensor, then go to Step 11.
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6
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INSPECT EVAPORATOR TEMPERATURE SENSOR FOR MALFUNCTION
• Inspect the evaporator temperature sensor.
• Is the evaporator temperature sensor normal?
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Yes
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Go to the next step.
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No
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Replace the evaporator sensor, then go to Step 11.
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7
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INSPECT CABIN TEMPERATURE SENSOR FOR MALFUNCTION
• Inspect the cabin temperature sensor.
• Is the cabin temperature sensor normal?
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Yes
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Go to the next step.
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No
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Replace the cabin temperature sensor, then go to Step 11.
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8
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DETERMINE IF MALFUNCTION CAUSED BY BAD AIR MIX ACTUATOR
• Inspect the front air mix actuator.
• Is the front air mix actuator normal?
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Yes
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Inspect the air mix door and linkage for sticking.
• If the steering switch is normal:
• If there is any malfunction:
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No
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Replace the front air mix actuator, then go to Step 11.
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9
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DETERMINE IF MALFUNCTION CAUSED BY BAD AIRFLOW MODE ACTUATOR
• Inspect the front airflow mode actuator.
• Is the front airflow mode actuator normal?
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Yes
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Go to the next step.
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No
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Replace the front airflow mode actuator, then go to Step 11.
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10
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INSPECT EPS CONTROL MODULE FOR MALFUNCTION
• Inspect the EPS control module.
• Is the EPS control module normal?
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Yes
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Implement the following procedure, 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.
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No
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Replace the EPS control module, then go to the next step.
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11
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VERIFY THAT REPAIRS HAVE BEEN COMPLETED
• Has the malfunction symptom been eliminated?
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Yes
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Complete the symptom troubleshooting. Explain repair contents to customer.)
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No
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Repeat the inspection from Step 1.
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