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ECM Terminal Function & ECM Terminal And Input/Output Signal

WARNING: This page is about a different car, the 2018 Kia Optima. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Engine Control Module Connector End Views
G12308889G12308890G12308891G12308892G12308893G12308894G12308895G12308896G12308897G12308898G12308899Courtesy of KIA MOTORS AMERICA, INC.
ECM TERMINAL FUNCTION - CONNECTOR [A]

Pin No. Description Connected to
1 -  
2 -  
3 -  
4 -  
5 EGR valve (motor +) EGR valve
6 EGR valve (motor -) EGR valve
7 -  
8 -  
9 -  
10 -  
11 -  
12 -  
13 -  
14 -  
15 EGR valve (Feedback signal) EGR valve
16 -  
17 Engine Coolant Temperature Sensor (ECTS) signal input Engine Coolant Temperature Sensor (ECTS)
18 -  
19 -  
20 Ignition Coil (Cylinder #2) control output Ignition Coil (Cylinder #2)
21 Ignition Coil (Cylinder #3) control output Ignition Coil (Cylinder #3)
22 -  
23 -  
24 -  
25 -  
26 PWM_Command Oil Pump Unit (OPCU)
27 -  
28 -  
29 -  
30 -  
31 -  
32 Mass Air Flow Sensor (MAFS) signal input Mass Air Flow Sensor (MAFS)
33 -  
34 -  
35 -  
36 EGR valve (Ground) EGR valve
37 Sensor ground Engine Coolant Temperature Sensor (ECTS)
38 Sensor ground Rail Pressure Sensor (RPS)
39 Rail Pressure Sensor (RPS) signal input Rail Pressure Sensor (RPS)
40 -  
41 Ignition Coil (Cylinder #4) control output Ignition Coil (Cylinder #4)
42 Ignition Coil (Cylinder #1) control output Ignition Coil (Cylinder #1)
43 -  
44 -  
45 -  
46 -  
47 -  
48 -  
49 Sensor ground Crankshaft Position Sensor (CKPS)
50 Sensor ground Camshaft Position Sensor (CMPS) [Bank 1/Exhaust]
51 Sensor ground Camshaft Position Sensor (CMPS) [Bank 1/Intake]
52 Sensor ground Mass Air Flow Sensor (MAFS)
53 -  
54 -  
55 -  
56 -  
57 -  
58 -  
59 Sensor ground Throttle Position Sensor (TPS) 1, 2
60 Sensor ground Manifold Absolute Pressure Sensor (MAPS)
61 Sensor shield Knock Sensor (KS)
62 Sensor ground Knock Sensor (KS)
63 Knock Sensor (KS) signal input Knock Sensor (KS)
64 -  
65 -  
66 -  
67 -  
68 -  
69 -  
70 OPCU Condition Oil Pump Unit (OPCU)
71 -  
72 -  
73 -  
74 Camshaft Position Sensor (CMPS) [Bank 1/Exhaust] signal input Camshaft Position Sensor (CMPS) [Bank 1/Exhaust]
75 -  
76 -  
77 -  
78 -  
79 -  
80 Throttle Position Sensor (TPS) 2 signal input Throttle Position Sensor (TPS) 2
81 Intake Air Temperature Sensor (IATS) signal input Intake Air Temperature Sensor (IATS)
82 Manifold Absolute Pressure Sensor (MAPS) signal input Manifold Absolute Pressure Sensor (MAPS)
83 Rc/Rp (Pump Cell Voltage) Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1]
84 VS-/IP- (Common Ground for VS, IP) Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1]
85 -  
86 -  
87 -  
88 -  
89 ETC Motor [+] control output ETC Motor
90 ETC Motor [-] control output ETC Motor
91 -  
92 -  
93 -  
94 -  
95 Crankshaft Position Sensor (CKPS) signal input Crankshaft Position Sensor (CKPS)
96 Camshaft Position Sensor (CMPS) [Bank 1/Intake] signal input Camshaft Position Sensor (CMPS) [Bank 1/Intake]
97 -  
98 -  
99 Sensor power (+5V) Crankshaft Position Sensor (CKPS)
EGR valve
100 Throttle Position Sensor (TPS) 1 signal input Throttle Position Sensor (TPS) 1
101 Sensor power (+5V) Throttle Position Sensor (TPS) 1, 2
102 Sensor ground Rail Pressure Sensor (RPS)
103 Sensor power (+5V) Manifold Absolute Pressure Sensor (MAPS)
104 Rc (Compensative Resistance) Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1]
105 VS + (NERNST Cell Voltage) Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1]
ECM TERMINAL FUNCTION - CONNECTOR [B]

Pin No. Description Connected to
1 ECM ground Chassis Ground
2 ECM ground Chassis Ground
3 Battery power (B+) Main Relay
4 ECM ground Chassis Ground
5 Battery power (B+) Main Relay
6 Battery power (B+) Main Relay
7 -  
8 Flexray communication [high] signal input Other control module, Data Link Connector (DLC), Multi-Purpose Check Connetor
9 -  
10 Brake Switch [test] signal input Brake Switch
11 -  
12 -  
13 Electrical load signal input Wiper Motor
14 Immobilizer communication line Smart key Control Module
15 -  
16 Main Relay control output Main Relay
17 -  
18 -  
19 -  
20 CVVT Oil Control (OCV) Valve [Bank 1/Intake] control output CVVT Oil Control (OCV) Valve [Bank 1/Intake]
21 -  
22 Injector (Cylinder #2) [high] control output Injector (Cylinder #2)
23 Injector (Cylinder #2) [low] control output Injector (Cylinder #2)
24 -  
25 Flexray communication [low] signal input Other control module, Data Link Connector (DLC), Multi-Purpose Check Connetor
26 -  
27 Brake Switch [lamp] signal input Brake Switch
28 -  
29 -  
30 -  
31 -  
32 LIN communication signal input Battery Sensor
33 Fuel Pump Relay control output Fuel Pump Relay
34 -  
35 Cooling Fan PWM control output Cooling Fan Motor
36 -  
37 -  
38 -  
39 Injector (Cylinder #3) [high] control output Injector (Cylinder #3)
40 Injector (Cylinder #3) [low] control output Injector (Cylinder #3)
41 Battery power (B+) Ignition Switch
42 -  
43 -  
44 Sensor ground Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2]
45 -  
46 Sensor ground Accelerator Position Sensor (APS) 2
47 Sensor ground Accelerator Position Sensor (APS) 1
48 -  
49 -  
50 Sensor ground A/C Pressure Transducer (APT)
51 -  
52 -  
53 -  
54 Vehicle speed signal output Cluster
55 -  
56 Injector (Cylinder #4) [high] control output Injector (Cylinder #4)
57 Injector (Cylinder #4) [low] control output Injector (Cylinder #4)
58 Heated Oxygen Sensor [Bank 1/Sensor 2] signal input Heated Oxygen Sensor [Bank 1/Sensor 2]
59 H-CAN [low] Other control module, Data Link Connector (DLC), Multi-Purpose Check Connetor
60 C-CAN [high] Other control module, Data Link Connector (DLC), Multi-Purpose Check Connetor
61 -  
62 -  
63 -  
64 Accelerator Position Sensor (APS) 2 signal input Accelerator Position Sensor (APS) 2
65 Accelerator Position Sensor (APS) 1 signal input Accelerator Position Sensor (APS) 1
66 -  
67 -  
68 -  
69 Eletric Water Pump (Stand-by) Eletric Water Pump (EWP)
70 -  
71 Purge Control Solenoid Valve (PCSV) control output Purge Control Solenoid Valve (PCSV)
72 -  
73 Injector (Cylinder #1) [high] control output Injector (Cylinder #1)
74 Injector (Cylinder #1) [low] control output Injector (Cylinder #1)
75 Battery power (B+) Battery
76 H-CAN [high] Other control module, Data Link Connector (DLC), Multi-Purpose Check Connetor
77 C-CAN [low] Other control module, Data Link Connector (DLC), Multi-Purpose Check Connetor
78 Vehicle speed signal input Integrated brake actuation unit
Smart key Control Module
79 Sensor power (+5V) A/C Pressure Transducer (APT)
80 -  
81 Sensor power (+5V) Accelerator Position Sensor (APS) 1
82 Sensor power (+5V) Accelerator Position Sensor (APS) 2
83 -  
84 Fuel Tank Level Sender Fuel Tank Level Sender
85 -  
86 CVVT Oil Control (OCV) Valve [Bank 1/Exhaust] control output CVVT Oil Control Valve (OCV) [Bank 1/Exhaust]
87 -  
88 Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1] Heater control output Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1]
89 Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2] Heater control output Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2]
90 Fuel Pressure Control Valve [high] Control Fuel Pressure Control Valve
91 Fuel Pressure Control Valve [low] Control Fuel Pressure Control Valve
ECM TERMINAL INPUT/OUTPUT SIGNAL - CONNECTOR [A]

Pin No. Description Condition Type Level
1 -      
2 -      
3 -      
4 -      
5 EGR valve (motor +)      
6 EGR valve (motor -)      
7 -      
8 -      
9 -      
10 -      
11 -      
12 -      
13 -      
14 -      
15 EGR valve (Feedback signal)      
16 -      
17 Engine Coolant Temperature Sensor (ECTS) signal input Idle Analog 0.5 - 4.5V (Idle: 1.02V)
18 -      
19 -      
20 Ignition Coil (Cylinder #2) control output Engine Run Pulse Vpeak = 360 - 440V 125 (Idle: 333Hz)
21 Ignition Coil (Cylinder #3) control output Engine Run Pulse Vpeak = 360 - 440V 125 (Idle: 333Hz)
22 -      
23 -      
24 -      
25 -      
26 PWM_Command - PWM output 0V/Battery Voltage Level 9V
27 -      
28 -      
29 -      
30 -      
31 -      
32 Mass Air Flow Sensor (MAFS) signal input Idle Analog 0.8 - 1.6V (Idle: 1.37V)
33 -      
34 -      
35 -      
36 EGR valve (Ground) - - -
37 Sensor ground Idle DC -0.3 -0.5V
38 Sensor ground Idle DC -0.3 - 0.5V
39 Rail Pressure Sensor (RPS) signal input Idle Analog -0.3 - 5.2V
40 -      
41 Ignition Coil (Cylinder #4) control output Engine Run Pulse Vpeak = 360 - 440V 125 (Idle: 333Hz)
42 Ignition Coil (Cylinder #1) control output Engine Run Pulse Vpeak = 360 - 440V 125 (Idle: 333Hz)
43 -      
44 -      
45 -      
46 -      
47 -      
48 -      
49 Sensor ground Idle DC -0.3 - 0.5V
50 Sensor ground Idle DC -0.3 - 0.5V
51 Sensor ground Idle DC -0.3 - 0.5V
52 Sensor ground Idle DC -0.3 - 0.5V
53 -      
54 -      
55 -      
56 -      
57 -      
58 -      
59 Sensor ground Idle DC -0.3 - 0.5V
60 Sensor ground Idle DC -0.3 - 0.5V
61 Sensor shield Idle DC -0.3 - 0.5V
62 Sensor ground Idle DC -0.3 - 0.5V
63 Knock Sensor (KS) signal input Knocking Variable Frequency -0.3 - 0.3V
Normal 0V
64 -      
65 -      
66 -      
67 -      
68 -      
69 -      
70 OPCU Condition - Input 0V/Battery Voltage Level
9V< Battery Voltage Level< 16V
71 -      
72 -      
73 -      
74 Camshaft Position Sensor (CMPS) [Bank 1/Exhaust] signal input Engine Run Pulse High: 4.5 - 5.5V
Low: -0.3 - 0.5V
Frequency: 7Hz (Idle), 25Hz (3, 000rpm)
75 -      
76 -      
77 -      
78 -      
79 -      
80 Throttle Position Sensor (TPS) 2 signal input C.T Analog 4.2 - 5.0V
W.O.T 3.3 - 3.8V
81 Intake Air Temperature Sensor (IATS) signal input Idle Analog 0 - 5.0V (Idling : 2.55V)
82 Manifold Absolute Pressure Sensor (MAPS) signal input Idle Analog 0.8 - 1.6V (Idling : 1.37V)
83 Rc/Rp (Pump Cell Voltage) Idle Analog Normal: 450±50 mV
Rich: Max. Normal+150 mV
Lean: Min. Normal-150 mV
84 VS-/IP- (Common Ground for VS, IP) Idle Analog Reference for V_IP, V_N
85 -      
86 -      
87 -      
88 -      
89 ETC Motor [+] control output Engine Run Pulse High: Battery Voltage (B+)
Low: Max1.0V
90 ETC Motor [-] control output Engine Run Pulse High: Battery Voltage (B+)
Low: Max1.0V
91 -      
92 -      
93 -      
94 -      
95 Crankshaft Position Sensor (CKPS) signal input Engine Run Pulse High: 4.5 - 5.5V
Low: -0.3 - 0.5V
Frequency: 850Hz (Idle), 3, 000Hz (3, 000rpm)
96 Camshaft Position Sensor (CMPS) [Bank 1/Intake] signal input Engine Run Pulse High: 4.5 - 5.5V
Low: -0.3 - 0.5V
Frequency: 7Hz (Idle), 25Hz (3, 000rpm)
97 -      
98 -      
99 Sensor power (+5V) IG OFF DC Max 0.5V
IG ON 4.75 - 5.25V
100 Throttle Position Sensor (TPS) 1 signal input C.T Analog 0.3 - 0.9V
W.O.T 1.5 - 3.0V
101 Sensor power (+5V) IG OFF DC Max 0.5V
IG ON 4.75 - 5.25V
102 Sensor Ground IG OFF DC Max 0.5V
IG ON 4.75 - 5.25V
103 Sensor power (+5V) IG OFF DC Max 0.5V
IG ON 4.75 - 5.25V
104 Rc (Compensative Resistance) Idle Analog |Rc-Rc/Rp|<±0.1V
105 VS + (NERNST Cell Voltage) Idle Analog Normal: 450±50 mV
Rich: Max. Normal+150 mV
Lean: Min. Normal-150 mV
ECM TERMINAL INPUT/OUTPUT SIGNAL - CONNECTOR [B]

Pin No. Description Condition Type Level
1 ECM ground Idle DC -0.3 - 0.5V
2 ECM ground Idle DC -0.3 - 0.5V
3 Battery power (B+) IG OFF DC Max 1.0V
IG ON Battery Voltage (B+)
4 ECM ground Idle DC -0.3 - 0.5V
5 Battery power (B+) IG OFF DC Max 1.0V
IG ON Battery Voltage (B+)
6 Battery power (B+) IG OFF DC Max 1.0V
IG ON Battery Voltage (B+)
7 -      
8 Flexray communication [high] signal input - - -
9 -      
10 Brake Switch [test] signal input Brake OFF DC Battery Voltage (B+)
Brake ON Max 0.5V
11 -      
12 -      
13 Electrical load signal input Lamp OFF DC Battery Voltage (B+)
Lamp ON -0.3 - 0.5V
14 Immobilizer communication line - - -
15 -      
16 Main Relay control output Relay OFF DC Battery Voltage (B+)
Relay ON -0.3 - 1.2V
17 -      
18 -      
19 -      
20 CVVT Oil Control (OCV) Valve [Bank 1/Intake] control output Idle Pulse High: Battery Voltage (B+)
Low: -0.3 - 1.0V
Frequency: 300Hz
21 -      
22 Injector (Cylinder #2) [high] control output Engine Run PWM
G12308890
23 Injector (Cylinder #2) [low] control output Engine Run Pulse
G12308891
24 -      
25 Flexray communication [low] signal input      
26 -      
27 Brake Switch [lamp] signal input Brake OFF DC Max 0.5V
Brake ON Battery Voltage (B+)
28 -      
29 -      
30 -      
31 -      
32 LIN commuunication signal input      
33 Fuel Pump Relay control output Relay OFF DC Battery Voltage (B+)
Relay ON -0.3 - 1.2V
34 -      
35 Cooling Fan PWM control output IG OFF PWM Battery Voltage (B+)
IG ON -0.3 - 1.2V
36 -      
37 -      
38 -      
39 Injector (Cylinder #3) [high] control output Engine Run PWM
G12308892
40 Injector (Cylinder #3) [low] control output Engine Run Pulse
G12308893
41 Battery power (B+) IG OFF DC Max 1.0V
IG ON Battery Voltage (B+)
42 -      
43 -      
44 Sensor ground Idle DC -0.3 - 0.5V
45 - - - -
46 Sensor ground Idle DC -0.3 - 0.5V
47 Sensor ground Idle DC -0.3 - 0.5V
48 Sensor ground Idle DC -0.3 - 0.5V
49 -      
50 Sensor ground Idle DC -0.3 - 0.5V
51 -      
52 -      
53 -      
54 Vehicle speed signal output Engine Run Frequency Battery Voltage (B+)
Low: -0.3 - 1.0V
Frequency: 21Hz (Idle), 100Hz (3, 000rpm)
55 -      
56 Injector (Cylinder #4) [high] control output Engine Run PWM
G12308894
57 Injector (Cylinder #4) [low] control output Engine Run Pulse
G12308895
58 Heated Oxygen Sensor [Bank 1/Sensor 2] signal input Idle DC Rich: 0.6 - 1.0V
Lean: Max 0.4V
59 H-CAN [low] Recessive Pulse 2.0 - 3.0V
Dominant 2.75 - 4.5V
60 C-CAN [high] Recessive Pulse 2.0 - 3.0V
Dominant 2.75 - 4.5V
61 -      
62 -      
63 -      
64 Accelerator Position Sensor (APS) 2 signal input C.T Analog Max 1.0V
W.O.T 1.5 - 3.0V
65 Accelerator Position Sensor (APS) 1 signal input C.T Analog Max 1.0V
W.O.T Minimum 4.0V
66 -      
67 -      
68 -      
69 Eletric Water Pump (Stand-by) - - -
70 -      
71 Purge Control Solenoid Valve (PCSV) control output Inactive Active Pulse High: Battery Voltage (B+)
Low: Max 1.0V
Vpeak: 42.0 - 60.0V
Frequency: 20Hz
72 -      
73 Injector (Cylinder #1) [high] control output Engine Run PWM
G12308896
74 Injector (Cylinder #1) [low] control output Engine Run Pulse
G12308897
75 Battery power (B+) IG OFF DC Max 1.0V
IG ON Battery Voltage (B+)
76 H-CAN [high] Recessive Pulse 2.0 - 3.0V
Dominant 2.75 - 4.5V
77 C-CAN [low] Recessive Pulse 2.0 - 3.0V
Dominant 2.75 - 4.5V
78 Vehicle speed signal input - - -
79 Sensor power (+5V) IG OFF DC Max 0.5V
IG ON 4.75 - 5.25V
80 -      
81 Sensor power (+5V) IG OFF DC Max 0.5V
IG ON 4.75 - 5.25V
82 Sensor power (+5V) IG OFF DC Max 0.5V
IG ON 4.75 - 5.25V
83 -      
84 Fuel Tank Level Sender - - -
85 -      
86 CVVT Oil Control (OCV) Valve [Bank 1/Exhaust] control output Idle Pulse High: Battery Voltage (B+)
Low: -0.3 - 1.0V
Frequency: 300Hz
87 - - - -
88 Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1] Heater control output Engine Run Pulse High: Battery Voltage (B+)
Low: -0.3 - 1.0V
Frequency: 8 - 10Hz
Duty: 0 - 100%
89 Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2] Heater control output Engine Run Pulse High: Battery Voltage (B+)
Low: -0.3 - 1.0V
Frequency: 8 - 10Hz
Duty: 0 - 100%
90 Fuel Pressure Control Valve [high] Control Engine Run PWM
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91 Fuel Pressure Control Valve [low] Control Engine Run PWM
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