ENGINE CONTROL SYSTEM OPERATION INSPECTION [SKYACTIV-X (E)]

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Drive-by-wire Control System Inspection

Load compensation inspection

1.  Start the engine and let it idle.

2.  Connect the M-MDS to the DLC-2.

3.  Select the ENG_RPM PID.

Note

•  Excludes temporary idle speed drop just after the loads are turned on.

4.  Verify that the engine speed is within specification under each load condition.

•  If the load condition is not as specified, inspect the following:

―  A/C switch and related wiring harness system (A/C request signal is always on or off)

(See A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY [FULL-AUTO AIR CONDITIONER].)

(See A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY [MANUAL AIR CONDITIONER].)

―  Electrical load

―  Charging system

(See BATTERY INSPECTION [(E)].)

(See INTEGRATED STARTER GENERATOR (ISG) INSPECTION.)

Electronic Control Throttle Operation Inspection

1.  Connect the M-MDS to the DLC-2.

2.  Perform the KOEO or KOER self test. (See DTC INSPECTION.)

3.  If any DTC related to the throttle valve or accelerator pedal position sensor is output, perform a DTC inspection.

•  If any one DTC is displayed, perform the DTC inspection. (See DTC TABLE [PCM (SKYACTIV-X)].)

4.  Access the following PCM PIDs using the M-MDS. (See PID/DATA MONITOR INSPECTION.)

•  THRO_ANG_ACT

•  THRO_ANG_COMD

5.  With the accelerator pedal not depressed and with it depressed to the floor, verify that the data monitor item THRO_ANG_ACT value changes in conjunction with the THRO_ANG_COMD value.

•  If this change cannot be verified, perform the Resistance Inspection for the throttle body.

(See THROTTLE BODY INSPECTION [SKYACTIV-X 2.0].)

Brake override system operation inspection

Note

•  If the brake override system operates normally after performing the following inspection, the PCM detects DTC P2299:00.

1.  Start the engine and let it idle.

2.  Verify that the engine speed becomes less than 1,200 rpm under the following conditions.

•  Neutral (MTX)

•  N position (ATX)

•  Engine speed of 3,000 rpm or more with accelerator pedal depressed

•  Brake pedal depressed

―  If the engine speed becomes approx. 1,200 rpm, clear the PCM DTC using the M-MDS. (System operation is normal.)

―  If the engine speed does not become approx. 1,200 rpm, inspect for the following parts, then repair or replace the malfunctioning part:

•  APP sensor

(See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [SKYACTIV-X 2.0].)

•  Neutral sensor No.1 (MTX)

Neutral sensor No.2 (MTX)

(See NEUTRAL SENSOR INSPECTION [SKYACTIV-X 2.0].)

•  Brake switch

(See BRAKE SWITCH INSPECTION.)

•  Communication between PCM and TCM (ATX)

(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)

Fuel Cut Control System Inspection

Note

•  This inspection has to be performed after the Fuel Injector Operation Inspection.

If data monitor function of M-MDS is used:

1.  Warm up the engine and idle it.

2.  Connect the M-MDS to the DLC-2.

3.  Select the ENG_RPM and the FUEL_PULSE_WD PIDs. (See PID/DATA MONITOR INSPECTION.)

4.  Monitor both PIDs while performing the following steps:

(1)  Depress the accelerator pedal and increase the ENG_RPM PID to 4,000 rpm.

(2)  Quickly release the accelerator pedal (brake pedal is not depressed) and verify that the FUEL_PULSE_WD PID is 0 msec, and 2—5 msec when the ENG_RPM PID drops below 1,200 rpm.

•  If not as specified, inspect the following:

―  ECT sensor No.1 and related wiring harness

ECT sensor No.2 and related wiring harness

ECT sensor No.3 and related wiring harness

(See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [SKYACTIV-X 2.0].)

If data monitor function of M-MDS is not used:

1.  Warm up the engine and idle it.

2.  Measure the fuel injector control signal wave profile using the oscilloscope while performing the following steps:

(1)  Depress the accelerator pedal and increase the engine speed to 4,000 rpm.

(2)  Quickly release the accelerator pedal (brake pedal is not depressed) and verify that the wave profile constant B+, and the wave appears when the engine speed drops below 1,200 rpm.

(See PCM INSPECTION [SKYACTIV-X 2.0].)

•  If not as specified, inspect the following:

―  ECT sensor No.1 and related wiring harness

ECT sensor No.2 and related wiring harness

ECT sensor No.3 and related wiring harness

(See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [SKYACTIV-X 2.0].)

A/C Cut-off Control System Inspection

1.  Start the engine.

2.  Turn the A/C switch on.

3.  Verify that the A/C compressor magnetic clutch actuates.

•  If it does not actuate, perform the symptom troubleshooting “A/C DOES NOT WORK SUFFICIENTLY“.

4.  Fully open the throttle valve and verify that the A/C compressor magnetic clutch does not actuate for 2—5 s.

•  If it actuates, inspect the following:

―  A/C relay

(See RELAY INSPECTION.)

―  Open or short to ground in wiring harness and connectors (Battery—IG1 relay No.2—A/C relay—PCM terminal 2AF)

―  A/C related parts

―  APP1, APP2 PIDs

Related PIDs