Kia Picanto: Engine Control / Fuel System / Engine Control System

Kia Picanto JA 2017-2024 Service & Repair Manual / Engine Control / Fuel System / Engine Control System

Components and components location

Components Location

1. ECM (Engine Control Module)
2. Manifold Absolute Pressure Sensor (MAPS)
3. Intake Air Temperature Sensor (IATS)
4. Boost Pressure Sensor (BPS)
5. Engine Coolant Temperature Sensor (ECTS)
6. Throttle Position Sensor (TPS) [integrated into ETC Module]
7. Crankshaft Position Sensor (CKPS)
8. Camshaft Position Sensor (CMPS) [Bank 1 / Intake]
9. Camshaft Position Sensor (CMPS) [Bank 1 / Exhaust]
10. Knock Sensor (KS)
11. Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 1]
12. Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 2]
13. Exhaust Gas Temperature Sensor (EGTS) #1
14. Exhaust Gas Temperature Sensor (EGTS) #2
15. Rail Pressure Sensor (RPS)
16. Accelerator Position Sensor (APS)

17. A/C Pressure Transducer (APT)
18. Fuel level sender (FLS)
19. Ambient Temperature Sensor (ATS)
20. ETC Motor [integrated into ETC Module]
21. Injector
22. Purge Control Solenoid Valve (PCSV)
23. CVVT Oil Control Valve (OCV) [Bank 1 / Intake]
24. CVVT Oil Control Valve (OCV) [Bank 1 / Exhaust]
25. Fuel Pressure Control Valve (FPCV)
26. Electric Waste Gate Actuator (EWGA)
27. RCV Control Solenoid Valve
28. Ignition Coil
29. Main Relay
30. Fuel Pump Relay
31. Data Link Connector (DLC) [16 Pin]
32. Multi-Purpose Check Connector [6 Pin]

1. ECM (Engine Control Module)	2. Manifold Absolute Pressure Sensor (MAPS) 3. Intake Air Temperature Sensor (IATS)

4. Boost Pressure Sensor (BPS)	5. Engine Coolant Temperature Sensor (ECTS)

6. Throttle Position Sensor (TPS) [integrated into ETC Module] 20. ETC Motor [integrated into ETC Module]	7. Crankshaft Position Sensor (CKPS)

8. Camshaft Position Sensor (CMPS) [Bank 1 / Intake]	9. Camshaft Position Sensor (CMPS) [Bank 1 / Exhaust]

10. Knock Sensor (KS)	11. Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 1]

12. Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 2]	13. Exhaust Gas Temperature Sensor (EGTS) #1

14. Exhaust Gas Temperature Sensor (EGTS) #2	15. Rail Pressure Sensor (RPS)

16. Accelerator Position Sensor (APS)	17. A/C Pressure Transducer (APT)

18. Fuel level sender (FLS)	19. Ambient Temperature Sensor (ATS)

21. Injector	22. Purge Control Solenoid Valve (PCSV)

23. CVVT Oil Control Valve (OCV) [Bank 1 / Intake]	24. CVVT Oil Control Valve (OCV) [Bank 1 / Exhaust]

25. Fuel Pressure Control Valve (FPCV)	26. Electric Waste Gate Actuator (EWGA)

27. RCV Control Solenoid Valve	28. Ignition Coil

29. Main Relay 30. Fuel Pump Relay	31. Data Link Connector (DLC) [16 Pin]

32. Multi-Purpose Check Connector [6 Pin]

Description and operation

Description

Failure of Gasoline Engine Control system components (sensors, ECM, injector, etcl) may result in interruption to the fuel supply or failure to supply the proper amount of fuel for various engine operating conditions. The following situations may be encountered:

1.	Engine is hard to start or does not start at all.

2.	Unstable idle.

3.	Poor driveability

If any of the above conditions occurs, first perform a routine diagnosis including basic engine checks (ignition system malfunction, incorrectengine adjustment, etc.). Then, inspect the Gasoline Engine Control system components with the KDS.

•	Before removing or installing any part, read the diagnostic trouble codes and then disconnect the battery negative (-) terminal.

•	Before disconnecting the cable from battery terminal, turn the ignition switch to OFF. Removal or connection of the battery cable during engine operation or while the ignition switch is ON could cause damage to the ECM.

•	The control harnesses between the ECM and heated oxygen sensor are shielded with the shielded ground wires to the body in order to prevent the influence of ignition noises and radio interference. When the shielded wire is faulty, the control harness must be replaced.

•	When checking the generator for the charging state, do not disconnect the battery '+' terminal as doing so may damage the ECM due to voltage.

•	When charging the battery with the external charger, disconnect the vehicle side battery terminals to prevent damaging the ECM.

Malfunction Indicator Lamp (MIL)

[EOBD]

The malfunction indicator lamp illuminates to notify the driver that there is a problem with the vehicle. However, the MIL will turn off automatically after 3 subsequent sequential driving cycles without the same malfunction. Immediately after the ignition switch is turned on (ON position without starting), the MIL will illuminate continuously to indicate that the MIL operates properly.

Faults with the following items will illuminate the MIL.

•

Catalyst

•	Fuel system

•	Manifold Absolute Pressure Sensor (MAPS)

•	Intake air temperature sensor

•	Engine coolant temperature sensor

•	ETC module (TPS & ETC motor)

•	Heated oxygen sensor (Upstream)

•	Heated oxygen sensor heater (Upstream)

•	Heated oxygen sensor (Downstream)

•	Heated oxygen sensor heater (Downstream)

•

Injector

•

Misfire

•	Crankshaft position sensor

•	Camshaft position sensor

•	Evaporative emission control system

•	Vehicle speed sensor

•	Power supply

•

ECM/ PCM

•	MT encoding

•	Acceleration sensor

•	MIL-ON request signal

•	Power stage

Refer to "Inspection Chart For Diagnostic Trouble Codes (DTC)" for more information.

[NON-EOBD]

Faults with the following items will illuminate the MIL

•	Heated oxygen sensor (HO2S)

•	Manifold Absolute Pressure Sensor (MAPS)

•	Engine coolant temperature sensor (ECTS)

•	ETC module (TPS & ETC motor)

•

Injectors

•

ECM

Refer to "Inspection Chart For Diagnostic Trouble Codes (DTC)" for more information.

[Inspection]

1.	After turning ON the ignition key, ensure that the light illuminates for about 5 seconds and then goes out.

2.	If the light does not illuminate, check for an open circuit in the harness, a blown fuse or a blown bulb.

Self-Diagnosis

The ECM monitors the input/output signals (some signals at all times and the others under specified conditions). When the ECM detects an irregularity, it records the diagnostic trouble code, and outputs the signal to the Data Link connector. The diagnosis results can be read with the MIL or the KDS. Diagnostic Trouble Codes (DTC) will remain in the ECM as long as battery power is maintained. The diagnostic trouble codes will, however, be erased when the battery terminal or ECM connector is disconnected, or by the KDS.

If a sensor connector is disconnected with the ignition switch turned on, the diagnostic trouble code (DTC) will be recorded. In this case, disconnect the battery negative terminal (-) for 15 seconds or more until the diagnostic memory is erased.

The relation between DTC and driving pattern in EOBD system

1.	When the same malfunction is detected and maintained during two consecutive driving cycles, the MIL will automatically illuminate.

2.	The MIL will go out automatically if no fault is detected for 3 consecutive driving cycles.

A Diagnostic Trouble Code(DTC) is recorded in ECM memory when a malfunction is detected during two consecutive driving cycles. The MIL will illuminate when the malfunction is detected on the second driving cycle.

If a misfire is detected, a DTC will be recorded, and the MIL will illuminate, immediately after a fault is first detected.

A Diagnostic Trouble Code(DTC) will automatically be erased from ECM memory if the same malfunction is not detected for 40 driving cycles.

•	A "warm-up cycle" means sufficient vehicle operation such that the coolant temperature has risen by at least 40°F from engine starting and reached a minimum temperature of 160°F.

•	A "driving cycle" consists of engine startup, vehicle operation beyond the beginning of closed loop operation.

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