Kia Picanto (JA): Engine Control System / Engine Control Module (ECM)

Kia Picanto (JA) 2017-2026 Service & Repair Manual / Engine Control / Fuel System / Engine Control System / Engine Control Module (ECM)

Schematic diagrams

ECM Terminal and Input/Output signal [M/T]

1. Harness Connector

2. Terminal Function [M/T]

[Connector A]

Pin No	Description
1	Ignition coil (Cylinder #3) control output
2	Ignition coil (Cylinder #2) control output
3	-
4	Electric Waste Gate Actuator (EWGA) Motor [+] control output
5	Injector (Cylinder #3) [Low] control output
6	-
7	Engine Coolant Temperature Sensor (ECTS) signal input
8	-
9	Boost Pressure Sensor (BPS) signal input
10	-
11	-
12	Electric Waste Gate Actuator (EWGA) Feed beck signal input
13	Throttle Position Sensor (TPS) 1 signal input
14	Accelerator Position Sensor (APS) 1 signal input
15	Brake Booster Vacuum Pressure Sensor (BBVPS) signal input
16	-
17	Ignition coil (Cylinder #1) control output
18	ETC motor [+] control output
19	Electric Waste Gate Actuator (EWGA) DC Motor [-] control output
20	Injector (Cylinder #2) [Low] control output
21	Wiper switch signal input
22	Neutral Switch signal input
23	-
24	Camshaft Position Sensor (CMPS) [Bank 1/Exhaust] signal input
25	A/C dual pressure switch signal input
26	Vehicle speed signal input
27	Start signal input
28	Brake Test switch signal input
29	Brake Light switch signal input
30	Clutch switch signal input
31	Injector (Cylinder #2) [High] control output
32	Injector (Cylinder #3) [High] control output
33	-
34	Injector (Cylinder #1) [Low] control output
35	Fuel Pressure Control Valve (FPCV) [High] control output
36	Camshaft position sensor (CMPS) [Bank 1/Intake] ground
37	Camshaft position sensor (CMPS) [Bank 1/Exhaust] ground
38	-
39	-
40	-
41	Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2] signal input
42	-
43	Battery Sensor Temperature signal input
44	ISG OFF switch signal input
45	Electric load signal input [Defrost]
46	-
47	Injector (Cylinder #1) [High] control output
48	ETC motor [-] control output
49	-
50	Fuel Pressure Control Valve (FPCV) [Low] control output
51	Wheel speed sensor [A] signal input
52	Wheel speed sensor [B] signal input
53	Crankshaft Position Sensor (CKPS) ground
54	Crankshaft Position Sensor (CKPS) signal input
55	-
56	Camshaft Position Sensor (CMPS) [Bank 1/Intake] signal input
57	Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2] ground
58	-
59	Battery Sensor Current Direct signal input
60	-

[Connector B]

Pin No	Description
1	ECM ground
2	ECM ground
3	ECM ground
4	Battery power (B+)
5	Battery power (B+)
6	Battery power (B+)
7	Battery power (B+)
8	Accelerator Position Sensor (APS) #1 ground
9	Manifold Air Temperature Sensor (MAPS) ground
10	Boost Pressure Sensor (BPS) ground
11	-
12	Electric Waste Gate Actuator (EWGA) ground
13	-
14	-
15	-
16	Engine Coolant Temperature Sensor (ECTS) ground
17	-
18	-
19	-
20	A/C compressor relay control output
21	-
22	CVVT Oil Control Valve (OCV) [Bank 1/Intake] control output
23	-
24	Cooling fan PWM control output
25	-
26	-
27	Fuel pump relay control output (With Immobilizer/Smart key)
28	-
29	Ignition switch signal input
30	Accelerator Position Sensor (APS) #2 ground
31	-
32	-
33	Battery sensor ground
34	-
35	-
36	Rail Pressure Sensor (RPS) ground
37	-
38	-
39	-
40	-
41	Start relay [Low] control output
42	-
43	Accelerator Position Sensor (APS) #2 power (+5V)
44	Camshaft Position Sensor (CMPS) power (+5V)
45	-
46	ISG OFF lamp signal output
47	-
48	-
49	-
50	CVVT Oil Control Valve (OCV) [Bank 1/Exhaust] control output
51	Main relay control output
52	Throttle Position Sensor (TPS) ground
53	Blower Switch MAX. signal input
54	-
55	-
56	Intake Temperature Sensor (IATS) signal input
57	Manifold Absolute Pressure Sensor (MAPS) signal input
58	Knock Sensor (KS) ground
59	VS+ (NERNST Cell Voltage)
60	Rc (Compensative Resistance)
61	LIN communication signal input
62	-
63	C-CAN [Low]
64	Batter sensor power (+5V)
65	Crankshaft Position Sensor (CKPS) power (+5V)
66	Accelerator Position Sensor (APS) #1 power (+5V)
67	Start relay [High] control output
68	RCV control solenoid valve control output
69	-
70	-
71	Fuel pump relay control output (W/O Immobilizer/Smart key)
72	-
73	-
74	Throttle Position Sensor (TPS) 2 signal input
75	-
76	Fuel Level Sensor (FLS) signal input
77	Accelerator Position Sensor (APS) 2 signal input
78	Rail Pressure Sensor (RPS) signal input
79	Knock Sensor (KS) signal input
80	VS-/IP- (Common Ground for VS, IP)
81	Rc/Rp (Pump Cell Voltage)
82	Engine speed signal output
83	Immobilizer communication line
84	-
85	C-CAN [High]
86	Manifold Absolute Pressure Sensor (MAPS) power (+5V)
86	Electric Waste Gate Actuator (EWGA) power (+5V)
87	Boost Pressure Sensor (BPS) power (+5V)
87	Rail Pressure Sensor (RPS) power (+5V)
88	ETC Module power (+5V)
89	Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1] Heater control output
90	-
91	Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2] Heater control output
92	-
93	-
94	Purge Control Solenoid Valve (PCSV) control output

Repair procedures

Removal

1.	Turn ignition switch OFF and disconnect the battery negative (-) terminal.

2.	Remove the battery. (Refer to "Engine Electrical System" - Battery")

3.	Disconnect the ECM connectors (A).

Remove the mounting bolts and nut, and then remove the ECM bracket assembly (A).

ECM bracket mounting bolt / nut:

9.8-11.8 N·m (1.0-1.2 kgf·m, 7.2-8.7 lb·ft)

Remove the ECM after loosening the mounting nuts (A) from the bracket.

ECM mounting nut:

9.8 - 11.8 N·m (1.0 - 1.2 kgf·m, 7.2 - 8.7 lb·ft)

Installation

1.	Install in the reverse order of removal.

ECM Problem Inspection Procedure

TEST ECM GROUND CIRCUIT: Measure resistance between ECM and chassis ground using the backside of ECM harness connector as ECM side check point. Repair any problem found.

Specification: Below 1Ω

2.	TEST ECM CONNECTOR: Disconnect the ECM connector and visually check the ground terminals on ECM side and harness side for bent pins or poor contact pressure. Repair any problem found.

3.	If problem could not be found in Steps 1 and 2, the ECM could be faulty. If so, make sure there is no DTC before replacing the ECM with a new one, and then check the vehicle again. If DTC is found, examine this first before replacing ECM.

RE-TEST THE ORIGINAL ECM: Install the original ECM (may be broken) into a known-good vehicle and check the vehicle. If the problem recurs, replace the original ECM with a new one. If the problem does not recur, this is an intermittent problem. (Refer to "Intermittent Problem Inspection Procedure" in Basic Inspection Procedure.)

Adjustment

ECM Neutral Mode procedure

•	After replacing the ECM of the vehicle by using the immobilizer, the following procedure must be performed.

[If installing a used ECM]

1)	Perform "ECM Neutral Mode" procedure using KDS. (Refer to "Body Electrical System - "Immobilizer System - Repair procedures")

2)	After finishing "ECM Neutral Mode", perform "Key Teaching" procedure using KDS. (Refer to "Body Electrical System - "Immobilizer System - Repair procedures")

[If installing a new ECM]

Perform "Key Teaching" procedure using KDS.

(Refer to "Body Electrical System - "Immobilizer System - Repair procedures")

•	After replacing the ECM of the vehicle by using the smart key system (button start), the following procedure must be performed.

[If installing a used ECM]

1)	Perform "ECM Neutral Mode" procedure using KDS. (Refer to "Body Electrical System - "Smart key - Repair procedures")

2)	After finishing "ECM Neutral Mode", turn IGN ON then OFF using the smart key or start button. Then the ECM learns information on the smart key automatically.

[If installing a new ECM]

Turn IGN ON then OFF using the smart key or start button. Then the ECM learns information on the smart key automatically.

ETC module learning procedure

•	Perform ETC module learning after replacing the ETC module. (Refer to Electronic Throttle Control System - "Adjustment")

❮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.

ETC (Electronic Throttle Control) System❯

Specifications Specification Sensor Item Opening Percentage (%) Output Voltage (V) [Vref = 5V] TPS1 C.

Other information:

Kia Picanto (JA) 2017-2026 Service & Repair Manual: Electro Chromic Inside Rear View Mirror

Components and components location Components Description and operation Description The ECM (Electro Chromatic inside rear view Mirror) is one that automatically dims to protect the driver’s eyes when it senses light reflecting from the car behind.

Kia Picanto (JA) 2017-2026 Service & Repair Manual: Heater Core