Diagnostic Procedure

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I-STOP FUNCTION DOES NOT OPERATE (PYUL) DIAGNOSTIC PROCEDURE

Step	Inspection	Results	Action
1	VERIFY DTCs Perform the DTC inspection for the following modules. (See DTC INSPECTION .) PCM TCM Electronically controlled brake unit/DSC HU/CM 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 (PYUL)] .) (See DTC TABLE [TCM (PM8AX-EC)] .) (See DTC TABLE [DSC] .) (See DTC TABLE [DASH_ESU] .) (See DTC TABLE [BCM] .)
1		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. (See PID/DATA MONITOR INSPECTION .) (See PID/DATA MONITOR TABLE [PCM (PYUL)] .) 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.
2		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
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.
3		No	Verify the i-stop (engine-stop control) permit condition and perform the repair completion verification 1. (See SYMPTOM TROUBLESHOOTING [PYUL] ).
4	PERFORM BATTERY CONDITION INITIAL SETTING (i-stop SETTING) Perform the battery condition initial setting (i-stop setting). (Refer to [ BATTERY CONDITION INITIALIZATION SETTING (i-stop SETTING)] ). Drive the vehicle to verify the i-stop operation condition. Is engine-stopping by i-stop operable?	Yes	Perform the repair completion verification 1.
4		No	Go to the next step.
5	VERIFY AMBIENT TEMPERATURE SENSOR FOR MALFUNCTION Inspect the applicable part. (Refer to [AMBIENT TEMPERATURE SENSOR INSPECTION ] ). Is the part normal?	Yes	Go to the next step.
5		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (Refer to [AMBIENT TEMPERATURE SENSOR REMOVAL/INSTALLATION ] ).
6	VERIFY EVAPORATOR TEMPERATURE SENSOR FOR MALFUNCTION Inspect the applicable part. (Refer to [EVAPORATOR TEMPERATURE SENSOR INSPECTION ] ). Is the part normal?	Yes	Full-auto air conditioner: Go to the next step. Manual air conditioner: Go to Step 8.
6		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (Refer to [EVAPORATOR TEMPERATURE SENSOR REMOVAL/INSTALLATION ] ).
7	VERIFY PASSENGER COMPARTMENT TEMPERATURE SENSOR FOR MALFUNCTION Inspect the applicable part. (Refer to [PASSENGER COMPARTMENT TEMPERATURE 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 1. (Refer to [PASSENGER COMPARTMENT TEMPERATURE SENSOR REMOVAL/INSTALLATION ] ).
8	DETERMINE IF MALFUNCTION CAUSED BY AIR MIX ACTUATOR MALFUNCTION Inspect the applicable part. (Refer to [AIR MIX ACTUATOR INSPECTION ] ). Is the part normal?	Yes	Inspect the air mix door and linkage for sticking. (Refer to [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 1.
8		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (Refer to [AIR MIX ACTUATOR REMOVAL/INSTALLATION ] ).
9	VERIFY AIRFLOW MODE ACTUATOR FOR MALFUNCTION Inspect the applicable part. (Refer to [AIRFLOW MODE ACTUATOR 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 1. (Refer to [AIRFLOW MODE ACTUATOR REMOVAL/INSTALLATION ] ).
10	VERIFY EPS CONTROL MODULE FOR MALFUNCTION Inspect the applicable part. (Refer to [EPS CONTROL MODULE INSPECTION ] ). Is the part normal?	Yes	Implement the following procedure, then go to the next step. Switch the ignition off, and after 2 min or more have elapsed, switch the ignition ON. 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. Stop the vehicle with the wheels in the straight-ahead position.
10		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (Refer to [STEERING GEAR AND LINKAGE REMOVAL/INSTALLATION ] ).
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 MALFUNCTION DIAGNOSIS FLOW [CONTROLLER AREA NETWORK (CAN)] .) If the CAN communication is normal, perform the diagnosis from Step 1. If the malfunction recurs, replace the PCM. (Refer to [PCM REMOVAL/INSTALLATION ] ).