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ENGINE DOES NOT RESTART [SKYACTIV-G]

id1103sb002300

Troubleshooting item	Engine does not restart
Description	•  The engine does not restart after the engine was stopped by the i-stop control.
Possible cause	•  DTCs are stored in the following modules. ―  PCM ―  TCM (ATX) ―  DSC HU/CM (without Mazda M Hybrid) ―  Electronically controlled brake unit (with Mazda M Hybrid) ―  Dash-electrical supply unit ―  Body control module (BCM) •  Engine does not crank when engine restart is initiated ―  Engine starting system malfunction •  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. ―  ACC_LON_C ―  BRK_FLD_PRES ―  BRK_PEDAL_SW ―  WSPD_SEN_L/F ―  WSPD_SEN_L/R ―  WSPD_SEN_R/F ―  WSPD_SEN_R/R
System wiring diagram	•  Not applicable
Connector diagram	•  Not applicable

i-stop (Engine Restart Control) Permit Condition

Diagnostic procedure

Step	Inspection	Results	Action
1	VERIFY ENGINE CRANKING OCCURRENCE •  Start the engine. •  Does the engine start?	Yes	Go to the next step.
		No	Perform the symptom troubleshooting “WILL NOT CRANK” and “CRANKS NORMALLY BUT WILL NOT START”. (See WILL NOT CRANK [SKYACTIV-G (E)].) (See CRANKS NORMALLY BUT WILL NOT START [SKYACTIV-G].)
2	VERIFY DTC •  Perform the DTC inspection for the following modules. (See DTC INSPECTION.) ―  PCM ―  TCM (ATX) ―  DSC HU/CM (without Mazda M Hybrid) ―  Electronically controlled brake unit (with Mazda M Hybrid) ―  Dash-electrical supply unit ―  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 (E))].) (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (ET6A-EL, ET6AX-EL) (E)].) (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (EV6A-EL, EV6AX-EL) (E)].) (See DTC TABLE [DSC HU/CM (E)].) (See DTC TABLE [ELECTRONICALLY CONTROLLED BRAKE UNIT].) (See DTC TABLE [DASH-ELECTRICAL SUPPLY UNIT (E)].) (See DTC TABLE [BODY CONTROL MODULE (BCM) (E)].)
		No	Go to the next step.
3	VERIFY i-stop (ENGINE RESTART 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 restart control) permit conditions using the M-MDS. (See PID/DATA MONITOR INSPECTION.) (See PID/DATA MONITOR TABLE [SKYACTIV-G].) •  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?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
4	VERIFY VEHICLE CONDITIONS RELATED TO i-stop (ENGINE RESTART CONTROL) PERMIT CONDITIONS •  Drive the vehicle and perform engine stopping by i-stop. •  Verify that the engine restarts when any of the following conditions is met: ―  Gear position: 2nd gear fixed mode ―  A/C set temperature: MAX or MIN ―  Windshield defroster switch: ON •  Does the engine restart?	Yes	Verify the i-stop (engine restart control) permit condition and perform the repair completion verification 1. (See SYMPTOM DIAGNOSTIC INDEX [SKYACTIV-G].)
		No	Go to the next step.
5	INSPECT AMBIENT TEMPERATURE SENSOR FOR MALFUNCTION •  Inspect the applicable part. (See AMBIENT TEMPERATURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER].) (See AMBIENT TEMPERATURE SENSOR INSPECTION [MANUAL AIR CONDITIONER].) •  Is the part normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (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 applicable part. (See EVAPORATOR TEMPERATURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER].) (See EVAPORATOR TEMPERATURE SENSOR INSPECTION [MANUAL AIR CONDITIONER].) •  Is the part normal?	Yes	Full-auto air conditioner: •  Go to the next step. Manual air conditioner: •  Go to Step 8.
		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (See EVAPORATOR TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER (E)].) (See EVAPORATOR TEMPERATURE SENSOR REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER (E)].)
7	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.
		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (See PASSENGER COMPARTMENT TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER (E)].)
8	DETERMINE IF MALFUNCTION CAUSED BY AIR MIX ACTUATOR MALFUNCTION •  Inspect the applicable part. (See AIR MIX ACTUATOR INSPECTION [FULL-AUTO AIR CONDITIONER].) (See AIR MIX ACTUATOR INSPECTION [MANUAL AIR CONDITIONER].) •  Is the part normal?	Yes	Inspect the air mix door and linkage for sticking. (See A/C UNIT DISASSEMBLY/ASSEMBLY [(E)].) 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 1.
		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (See AIR MIX ACTUATOR REMOVAL [FULL-AUTO AIR CONDITIONER (E)].) (See AIR MIX ACTUATOR INSTALLATION [FULL-AUTO AIR CONDITIONER (E)].) (See AIR MIX ACTUATOR REMOVAL [MANUAL AIR CONDITIONER (E)].) (See AIR MIX ACTUATOR INSTALLATION [MANUAL AIR CONDITIONER (E)].)
9	INSPECT AIRFLOW MODE ACTUATOR FOR MALFUNCTION •  Inspect the applicable part. (See AIRFLOW MODE ACTUATOR INSPECTION [FULL-AUTO AIR CONDITIONER].) (See AIRFLOW MODE ACTUATOR INSPECTION [MANUAL AIR CONDITIONER].) •  Is the part normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (See AIRFLOW MODE ACTUATOR REMOVAL [FULL-AUTO AIR CONDITIONER (E)].) (See AIRFLOW MODE ACTUATOR INSTALLATION [FULL-AUTO AIR CONDITIONER (E)].) (See AIRFLOW MODE ACTUATOR REMOVAL [MANUAL AIR CONDITIONER (E)].) (See AIRFLOW MODE ACTUATOR INSTALLATION [MANUAL AIR CONDITIONER (E)].)
10	INSPECT EPS CONTROL MODULE FOR MALFUNCTION •  Inspect the applicable part. (See EPS CONTROL MODULE INSPECTION.) •  Is the part normal?	Yes	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 {32 ft 10 in} 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	Repair or replace the malfunctioning location and perform the repair completion verification 1. (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION [(E)].)
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)
		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 [(E)].) •  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 [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].) (See PCM REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].)
		No	Replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].) (See PCM REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].)