Kia Forte Manuals

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

Kia Forte 2019-2024 (BD) Service Manual / Engine Control / Fuel System / Engine Control System / Engine Control Module (ECM)

Schematic diagrams
ECM Terminal And Input/Output signal

ECM Terminal Function

Connector [A]

Pin No.
Description
Connected to
1
Ignition coil (Cylinder #4) control output
Ignition coil (Cylinder #4) 
2
Ignition coil (Cylinder #3) control output
Ignition coil (Cylinder #3) 
3
-
　
4
-

5
Injector (Cylinder #3) [Low] control output
Injector (Cylinder #3)
6
-
　
7
Engine Coolant Temperature Sensor (ECTS) signal input
Engine Coolant Temperature Sensor (ECTS) 
8
-

9
Boost Pressure Sensor (BPS) signal input
Boost Pressure Sensor (BPS)
10
-

11
-
　
12
-

13
Throttle Position Sensor (TPS) 1 signal input
Throttle position sensor (TPS) #1 [ETC module]
14
Accelerator Position Sensor (APS) 1 signal input
Accelerator Position Sensor (APS)
15
-

16
Ignition coil (Cylinder #2) control output
Ignition coil (Cylinder #2)
17
Ignition coil (Cylinder #1) control output
Ignition coil (Cylinder #1)
18
ETC motor [+] control output
ETC Module
19
-

20
Injector (Cylinder #2) [Low] control output
Injector (Cylinder #2)
21
Wiper switch signal input
Wiper Relay
22
-
　
23
-
　
24
Camshaft Position Sensor (CMPS) [Bank 1/Exhaust] signal input
Camshaft Position Sensor (CMPS) [Bank 1/Exhaust]
25
-
　
26
Vehicle speed signal input
ABS/ESP Control Unit
27
Start signal input
Ignition Switch
28
Brake Test switch signal input
Brake Switch
29
Brake Light switch signal input
Brake Switch
30
-
　
31
Injector (Cylinder #2) [High] control output
Injector (Cylinder #2)
32
Injector (Cylinder #3) [High] control output
Injector (Cylinder #3)
33
-
　
34
Injector (Cylinder #1) [Low] control output
Injector (Cylinder #1) 
35
Fuel Pressure Control Valve (FPCV) [High] control output
Fuel Pressure Control Valve (FPCV)
36
Sensor ground
Camshaft Position Sensor (CMPS) [Bank 1/Intake]
37
Sensor ground
Camshaft Position Sensor (CMPS) [Bank 1/Exhaust]
38
Alternator PWM signal output
Alternator
39
-
　
40
-
　
41
Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2] signal input
Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2]
42
-
　
43
-
　
44
-

45
Electric load signal input [Defrost]
Alternator
46
Injector (Cylinder #4) [High] control output
Injector (Cylinder #4)
47
Injector (Cylinder #1) [High] control output
Injector (Cylinder #1)
48
ETC motor [-] control output
ETC Module
49
Injector (Cylinder #4) [Low] control output
Injector (Cylinder #4)
50
Fuel Pressure Control Valve (FPCV) [Low] control output
Fuel Pressure Control Valve (FPCV)
51
-
　
52
-
　
53
Sensor ground
Crankshaft Position Sensor (CKPS)
54
Crankshaft Position Sensor (CKPS) [B] signal input
Crankshaft Position Sensor (CKPS)
55
-
　
56
Camshaft Position Sensor (CMPS) [Bank 1/Intake] signal input
Camshaft Position Sensor (CMPS) [Bank 1/Intake]
57
Sensor ground
Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2]
58
-
　
59
-
　
60
-
　

Connector [K]

Pin No.
Description
Connected to
1
ECM ground
Chassis Ground
2
ECM ground
Chassis Ground
3
ECM ground
Chassis Ground
4
Battery power (B+)
Battery
5
Battery power (B+)
Battery
6
Battery power (B+)
Main Relay
7
Battery power (B+)
Main Relay
8
Sensor ground
Accelerator Position Sensor (APS) #1
9
Sensor ground
Manifold Absolute Pressure Sensor (MAPS)
10
Sensor ground
Boost Pressure Sensor (BPS)
11
-

12
-

13
-
　
14
-

15
-
　
16
Sensor ground
Engine Coolant Temperature Sensor (ECTS) 
17
-
　
18
-
　
19
Waste Gate Solenoid Valve (WGV) control output
Waste Gate Solenoid Valve (WGV)　
20
-
　
21
-
　
22
CVVT Oil Control Valve (OCV) [Bank 1/Intake] control output
CVVT Oil Control Valve (OCV) [Bank 1/Intake]
23
-
　
24
Cooling fan PWM control output
Cooling Fan Relay
25
-
　
26
-
　
27
Fuel pump relay control output (With Immobilizer/Smart key)
Fuel Pump Relay
28
-
　
29
Ignition switch signal input
Ignition switch
30
Sensor ground
Accelerator Position Sensor (APS) #2
31
-

32
-

33
-
　
34
-
　
35
-

36
Sensor ground
Rail Pressure Sensor (RPS)
37
Sensor ground
A/C Pressure Transducer (APT)
38
-
　
39
Alternator COM signal output
Alternator
40
-
　
41
Start relay control output
Start Relay
42
-
　
43
Sensor power (+5V)
Accelerator Position Sensor (APS) #2
44
Sensor power (+5V)
Camshaft Position Sensor (CMPS)
45
-
　
46
-

47
-
　
48
-
　
49
-
　
50
CVVT Oil Control Valve (OCV) [Bank 1/Exhaust] control output
CVVT Oil Control Valve (OCV) [Bank 1/Exhaust]
51
Main relay control output
Main Relay
52
Sensor ground
Throttle position sensor (TPS) #1,2 [ETC module]
53
Blower Switch MAX. signal input
Heater & A/C Control module
54
A/C Pressure Transducer (APT) signal input
A/C Pressure Transducer (APT)
55
-
　
56
Intake Temperature Sensor (IATS) signal input
Intake Temperature Sensor (IATS) 
57
Manifold Absolute Pressure Sensor (MAPS) signal input
Manifold Absolute Pressure Sensor (MAPS)
58
Sensor ground
Knock Sensor (KS)
59
VS+ (NERNST Cell Voltage)
Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1]
60
Rc (Compensative Resistance)
Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1]
61
LIN communication signal input
Battery Sensor
62
CCP-CAN [Low]
Other control module, Data Link Connector (DLC)
63
C-CAN [Low]
Other control module, Data Link Connector (DLC)
64
-
　
65
-

66
Sensor power (+5V)
Accelerator Position Sensor (APS) #1
67
-

68
RCV control solenoid valve control output
RCV control solenoid valve
69
-
　
70
-
　
71
Fuel pump relay control output (W/O Immobilizer/Smart key)
Fuel Pump Relay
72
-
　
73
-

74
Throttle Position Sensor (TPS) 2 signal input
Throttle position sensor (TPS) #1,2 [ETC module]
75
-
　
76
Fuel Level Sensor (FLS) signal input
Fuel Level Sensor (FLS)
77
Accelerator Position Sensor (APS) 2 signal input
Accelerator Position Sensor (APS) #2
78
Rail Pressure Sensor (RPS) signal input
Rail Pressure Sensor (RPS)
79
Knock Sensor (KS) signal input
Knock Sensor (KS)
80
VS-/IP- (Common Ground for VS, IP)
Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1]
81
Rc/Rp (Pump Cell Voltage)
Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1]
82
Engine speed signal output
Power Distribution Module (PDM)
83
Immobilizer communication line
Immobilizer control module
84
CCP-CAN [High]
Other control module, Data Link Connector (DLC)
85
C-CAN [High]
Other control module, Data Link Connector (DLC)
86
Sensor power (+5V)
Manifold Absolute Pressure Sensor (MAPS)
87
Sensor power (+5V)
Rail Pressure Sensor (RPS)
A/C Pressure Transducer (APT)
Boost Pressure Sensor (BPS)
88
Sensor power (+5V)
Throttle position sensor (TPS) #1,2 [ETC module]
89
Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1] heater control output
Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1]
90
-
　
91
Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2] heater control output
Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2]
92
-
　
93
-
　
94
Purge Control Solenoid Valve (PCSV) control output
Purge Control Solenoid Valve (PCSV) 

Repair procedures
Removal and Installation
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 connector (A).
4.

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

Tightening torque :

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

5.

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

Tightening torque :

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

6.

Install in the reverse order of removal.
ECM Problem Inspection Procedure
1.

TEST ECM GROUND CIRCUIT: Measure resistance between ECM and chassis ground using the backside of ECM harness connector as ECM side check point. If the problem is found, repair it.

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. If the problem is found, repair it.
3.

If problem is not found in Step 1 and 2, the ECM could be faulty. If so, make sure there were no DTC's before swapping the ECM with a new one, and then check the vehicle again. If DTC's were found, examine this first before swapping ECM.
4.

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

ECM Neutral Mode procedure (With Immobilizer)

•

After replacing the ECM of the vehicle with 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 - "Smart Key System")

2)

After finishing "ECM Neutral Mode", perform "Key Teaching" procedure using KDS.

(Refer to "Body Electrical System - "Smart Key")

[If installing a new ECM]

Perform "Key Teaching" procedure using KDS.

(Refer to "Body Electrical System - "Smart Key")

ECM Neutral Mode procedure (With Smart key)

•

After replacing the ECM of the vehicle with 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 System")

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.

(Refer to "Body Electrical System - "Smart Key")

[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.

(Refer to "Body Electrical System - "Smart Key")

ETC module learning procedure

Perform ETC module learning after replacing the ETC module.

(Refer to Electronic Throttle Control System - "Adjustment")

VIN programming procedure

VIN (Vehicle Identification Number) is a number that has the vehicle's information (Maker, Vehicle Type, Vehicle Line/Series, Body Type, Engine Type, Transmission Type, Model Year, Plant Location and so forth. For more information, please refer to the group "GI" in this SERVICE MANUAL). When replacing an ECM, the VIN must be programmed in the ECM. If there is no VIN in ECM memory, the fault code (DTC P0630) is set.

  

The programmed VIN cannot be changed. When writing the VIN, confirm the VIN carefully.
1.

Turn the ignition switch OFF.
2.

Connect the KDS to Data Link Connector (DLC).
3.

Turn the igntion switch ON.
4.

Select "Vehicle, Model Year, Engine, System".
5.

Select "Vehicle S/W Management".
6.

Select "Write VIN".
Engine Control System
Components and components location Components Location 1. Engine Control Module (ECM) 2. Manifold Absolute Pressure Sensor (MAPS) 3. Intake Air Temperature Sensor ...

ETC (Electronic Throttle Control) System
Specifications Specification Throttle angle(°) Output Voltage (V) TPS1 TPS2 0 0.5 4.5 ...

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