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

Circuit 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 Control Output (Cylinder #3)
2	Ignition Coil Control Output (Cylinder #2)
3	-
4	Electronic Wastegate Actuator (EWGA) Motor [+] Control Output
5	Injector (Cylinder No. 3) [Low] Control Output
6	-
7	Engine Coolant Temperature Sensor (ECTS) Signal Input
8	-
9	Boost Pressure Sensor (BPS) Input Signal
10	-
11	-
12	Electronic Wastegate Actuator (EWGA) Feedback Signal Input
13	Throttle Position Sensor (TPS) 1 Signal Input
14	Accelerator Pedal Position Sensor (APS) 1 Signal Input
15	Brake Booster Vacuum Pressure Sensor (BBVPS) Signal Input
16	-
17	Ignition Coil Control Output (Cylinder No. 1)
18	ETC Motor [+] Control Output
19	Electronic Wastegate Actuator (EWGA) DC Motor [-] Control Output
20	Injector (Cylinder No. 2) [Low] Control Output
21	Wiper Switch Signal Input
22	Neutral Switch Input Signal
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 Check Switch Input Signal
29	Stop Lamp Switch Input Signal
30	Clutch Switch Signal Input
31	Injector (Cylinder No. 2) [High] Control Output
32	Injector (Cylinder No. 3) [High] Control Output
33	-
34	Injector (Cylinder No. 1) [Low] Control Output
35	Fuel Pressure Control Valve (FPCV) [High] Control Output
36	Camshaft Position Sensor (CMPS) [Row 1/Intake] Ground
37	Camshaft Position Sensor (CMPS) [Row 1/Exhaust] Ground
38	-
39	-
40	-
41	Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2] Input Signal
42	-
43	Battery Sensor Temperature Signal Input
44	ISG OFF Switch Input Signal
45	Electrical Load Input Signal [Defrost]
46	-
47	Injector (Cylinder No. 1) [High] Control Output
48	ETC Motor [-] Control Output
49	-
50	Fuel Pressure Control Valve (FPCV) [Low] Control Output
51	Wheel Speed Sensor Signal Input [A]
52	Wheel Speed Sensor Signal Input [B]
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) [Row 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) No. 1 Ground
9	Manifold Absolute Pressure and Temperature Sensor (MAPS) Ground
10	Boost Pressure Sensor (BPS) Ground
11	-
12	Electronic Wastegate 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	Radiator Cooling Fan PWM Control Output
25	-
26	-
27	Fuel Pump Relay Control Output (with Immobilizer/Smart Key)
28	-
29	Ignition Switch Input Signal
30	Accelerator Position Sensor (APS) No. 2 Ground
31	-
32	-
33	Battery Sensor Ground
34	-
35	-
36	Rail Pressure Sensor (RPS) Ground
37	-
38	-
39	-
40	-
41	Starter Relay [Low] Control Output
42	-
43	Accelerator Position Sensor (APS) No. 2 Power Supply (+5V)
44	Camshaft Position Sensor (CMPS) Power Supply (+5V)
45	-
46	ISG OFF Lamp Output Signal
47	-
48	-
49	-
50	CVVT Oil Control Valve (OCV) Control Output [Bank 1/Exhaust]
51	Main Relay Control Output
52	Throttle Position Sensor (TPS) Ground
53	Fan Switch MAX Signal Input
54	-
55	-
56	Intake Air Temperature Sensor (IATS) Input Signal
57	Manifold Absolute Pressure Sensor (MAPS) Signal Input
58	Knock Sensor (KS) Ground
59	VS+ (Nernst Cell Voltage)
60	Rc (Compensation Resistance)
61	LIN Communication Input Signal
62	-
63	C-CAN [Low]
64	Battery Sensor Power Supply (+5V)
65	Crankshaft Position Sensor (CKPS) Power Supply (+5V)
66	Accelerator Position Sensor (APS) No. 1 Power Supply (+5V)
67	Starter Relay [High] Control Output
68	RCV Control Solenoid Valve Control Output
69	-
70	-
71	Fuel Pump Relay Control Output (without Immobilizer/Smart Key)
72	-
73	-
74	Throttle Position Sensor (TPS) 2 Signal Input
75	-
76	Fuel Level Sensor (FLS) Signal Input
77	Accelerator Pedal 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 Output Signal
83	Immobilizer Communication Line
84	-
85	C-CAN [High]
86	Manifold Absolute Pressure Sensor (MAPS) Power Supply (+5V)
86	Electronic Wastegate Actuator (EWGA) Power Supply (+5V)
87	Boost Pressure Sensor (BPS) Power Supply (+5V)
87	Rail Pressure Sensor (RPS) Power Supply (+5V)
88	ETC Module Power Supply (+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 the ignition switch OFF and disconnect the negative (-) battery terminal.
2
Disconnect the battery. (Refer to Engine Electrical System - Battery).
3
Disconnect the ECM connectors (A).
4
Remove the mounting bolts and nuts, then remove the engine control module bracket assembly (A). ECM bracket mounting bolt/nut: 9.8–11.8 N·m
5
Remove the ECM by loosening the mounting nuts (A) on the bracket.
ECM mounting nut: 9.8–11.8 N·m

Installation

Install in the reverse order of removal.

ECM Circuit Inspection Procedure

1
ECM GROUND CIRCUIT TEST: Measure the resistance between the ECM ground terminals and chassis ground, using the rear side of the ECM harness connector as the ECM-side checkpoint. Repair any problem found.
Specification: Below 1 Ω
2
ECM CONNECTOR TEST: Disconnect the ECM connector and visually check the ECM-side and harness-side ground terminals for bent pins or poor contact pressure. Repair any problem found.
3
If the problem cannot be found in steps 1 and 2, the ECM may be faulty. If so, make sure the DTC is not present before replacing the ECM with a new one, then recheck the vehicle. If a DTC is present, troubleshoot it first before replacing the ECM.
4
ECM RETEST WITH ORIGINAL ECM: Install the original ECM (suspected faulty) 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, it is an intermittent problem (Refer to Intermittent Troubleshooting Procedure in Basic Troubleshooting Procedure).

Adjustment

ECM Neutral Mode Procedure

After replacing the ECM on a vehicle equipped with an immobilizer, perform the following procedure.

[When Installing Used ECM]

1
Perform the "ECM Neutral Mode" procedure using KDS. (Refer to Body Electrical System - Immobilizer System - Repair Procedures).
2
After completing the "ECM Neutral Mode" procedure, perform the "Key Learning" procedure using KDS. (Refer to Body Electrical System - Immobilizer System - Repair Procedures).

[When installing a new ECM] Perform the "Key Learning" procedure using KDS. (Refer to Body Electrical System - Immobilizer System - Repair Procedures).

After replacing the ECM on a vehicle equipped with a smart key system (push button start), perform the following procedure.

[When Installing Used ECM]

1
Perform the "ECM Neutral Mode" procedure using KDS. (Refer to Body Electrical System - Smart Key System - Repair Procedures).
2
After completing the "ECM Neutral Mode", turn the ignition on, then off using the smart key or start button. The ECM will then automatically learn the smart key information.

[When installing a new ECM] Turn the ignition on and then off using the Smart Key or the start button. The ECM will then automatically receive the Smart Key information.

ETC Module Learning Procedure

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

Engine Control Module (ECM)