2015 Kia Optima LXFACTORY OEM SERVICE PROCEDURE

ECM Terminal Input/Output Signal

Connector (CHG-AG) 

CONNECTOR PIN REFERENCE CHART

Pin No. Description Condition Type Level
1 Ignition Coil (Cylinder #2) control output Engine Running Pulse Vpeak = 360 ~ 440V
125 (333Hz at idle)
2 -      
3 -      
4 -      
5 ETC Motor (+) control output Engine Running Pulse High: Battery Voltage
Low: Max.1.0V
6 ETC Motor (-) control output Engine Running Pulse High: Battery Voltage
Low: Max.1.0V
7 -      
8 -      
9 -      
10 -      
11 -      
12 Sensor power (+5V) IG OFF DC Max. 0.5V
IG ON 4.75 ~ 5.25V
13 -      
14 Heated Oxygen Sensor (HO2S) (Bank 1/Sensor 2) signal input Idle DC Rich : 0.6 ~ 1.0V
Lean : Max 0.4V
15 -      
16 -      
17 -      
18 -      
19 -      
20 Fuel Tank Pressure Sensor (FTPS) signal input Idle Analog -0.3 ~ 5.2V
21 -      
22 Ignition Coil (Cylinder #4) control output Engine Running Pulse Vpeak = 360 ~ 440V
125 (333Hz at idle)
23 -      
24 -      
25 -      
26 -      
27 -      
28 -      
29 -      
30 -      
31 -      
32 -      
33 Sensor power (+5V) IG OFF DC Max. 0.5V
IG ON 4.75 ~ 5.25V
34 -      
35 Sensor ground Idle DC -0.3 ~ 0.5V
36 Ground Idle DC -0.3 ~ 0.5V
37 -      
38 -      
39 Rail Pressure Sensor (RPS) signal input Idle Analog -0.3 ~ 5.2V
40 -      
41 Sensor ground Idle DC -0.3 ~ 0.5V
42 -      
43 Shield Idle DC -0.3 ~ 0.5V
44 -      
45 -      
46 -      
47 -      
48 -      
49 -      
50 -      
51 -      
52 -      
53 -      
54 Sensor ground Idle DC -0.3 ~ 0.5V
55 Sensor ground Idle DC -0.3 ~ 0.5V
56 Sensor ground Idle DC -0.3 ~ 0.5V
57 Immobilizer communication line      
58 -      
59 Intake Air Temperature Sensor (IATS) signal input Idle Analog 0 ~ 5.0V (2.55V at Idle)
60 Sensor ground Idle DC -0.3 ~ 0.5V
61 Sensor ground Idle DC -0.3 ~ 0.5V
62 Sensor ground Idle DC -0.3 ~ 0.5V
63 Engine Coolant Temperature Sensor (ECTS) signal input Idle Analog 0.5 ~ 4.5V (1.02V at Idle)
64 Ignition Coil (Cylinder #3) control output Engine Running Pulse Vpeak = 360 ~ 440V
125 (333Hz at idle)
65 -      
66 -      
67 -      
68 -      
69 -      
70 -      
71 -      
72 -      
73 -      
74 -      
75 Throttle Position Sensor (TPS) 2 signal input C.T Analog 4.2 ~ 5.0V
W.O.T 3.3 ~ 3.8V
76 Accelerator Position Sensor (APS) 2 signal input C.T Analog Max. 1.0V
W.O.T 1.5 ~ 3.0V
77 Accelerator Position Sensor (APS) 1 signal input C.T Analog Max. 1.0V
W.O.T Min. 4.0V
78 -      
79 -      
80 Sensor ground Idle DC -0.3 ~ 0.5V
81 -      
82 Manifold Absolute Pressure Sensor (MAPS) signal input Idle Analog 0.8 ~ 1.6V (1.37V at Idle)
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 Ignition Coil (Cylinder #1) control output Engine Running Pulse Vpeak = 360 ~ 440V
125 (333Hz at idle)
86 -      
87 -      
88 -      
89 -      
90 -      
91 -      
92 -      
93 -      
94 -      
95 -      
96 Throttle Position Sensor (TPS) 1 signal input C.T Analog 0.3 ~ 0.9V
W.O.T 1.5 ~ 3.0V
97 Sensor power (+5V) IG OFF DC Max. 0.5V
IG ON 4.75 ~ 5.25V
98 Sensor power (+5V) IG OFF DC Max. 0.5V
IG ON 4.75 ~ 5.25V
99 -      
100 -      
101 A/C Pressure Transducer (APT) signal input      
102 -      
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

Connector (CHG-BG) 

CONNECTOR PIN REFERENCE CHART

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
4 ECM ground Idle DC -0.3 ~ 0.5V
5 Battery power (B+) IG OFF DC Max. 1.0V
IG ON Battery Voltage
6 Battery power (B+) IG OFF DC Max. 1.0V
IG ON Battery Voltage
7 -      
8 Crankshaft Position Sensor (CKPS) signal input Engine Running Pulse High : 4.5 ~ 5.5V
Low : -0.3 ~ 0.5V
Frequency: 850Hz (Idle), 3, 000Hz (3, 000 RPM)
9 -      
10 Brake Switch 2 signal input Brake OFF DC Battery Voltage
Brake ON Max. 0.5V
11 -      
12 -      
13 -      
14 -      
15 Electrical load signal input Lamp OFF DC Battery Voltage
Lamp ON -0.3 ~ 0.5V
16 Alternator PWM signal output Idle Pulse High: Battery Voltage
Low: Max. 1.5V
Frequency: 125Hz
17 -      
18 Cooling Fan Relay (High) control output Relay OFF DC Battery Voltage
Relay ON Max. 1.0V
19 Immobilizer Lamp control output Lamp OFF DC Battery Voltage
Lamp ON -0.3 ~ 1.2V
20 -      
21 -      
22 Injector (Cylinder #2) (High) control output Engine Running PWM
G07381622
23 Injector (Cylinder #2) (Low) control output Engine Running Pulse
G07381623
24 -      
25 Sensor ground Idle DC -0.3 ~ 0.5V
26 -      
27 Brake Switch 1 signal input Brake OFF DC Max. 0.5V
Brake ON Battery Voltage
28 -      
29 Camshaft Position Sensor (CMPS) (Bank 1/Intake) signal input Engine Running Pulse High: 4.5 ~ 5.5V
Low: -0.3 ~ 0.5V
Frequency: 7Hz (Idle), 25Hz (3, 000 RPM)
30 Camshaft Position Sensor (CMPS) (Bank 1/Exhaust) signal input Engine Running Pulse High: 4.5 ~ 5.5V
Low: -0.3 ~ 0.5V
Frequency: 7Hz (Idle), 25Hz (3, 000 RPM)
31 -      
32 LIN communication signal input      
33 Cooling Fan Relay (Low) control output Relay OFF DC Battery Voltage
Relay ON -0.3 ~ 1.2V
34 -      
35 -      
36 -      
37 Malfunction Indicator Lamp (MIL) control output Lamp OFF DC Battery Voltage
Lamp ON -0.3 ~ 1.2V
38 -      
39 Injector (Cylinder #3) (High) control output Engine Running PWM
G07381624
40 Injector (Cylinder #3) (Low) control output Engine Running Pulse
G07381625
41 Battery power (B+) IG OFF DC Max. 1.0V
IG ON Battery Voltage
42 -      
43 -      
44 Sensor shield Idle DC -0.3 ~ 0.5V
45 Sensor ground Idle DC -0.3 ~ 0.5V
46 Sensor ground Idle DC -0.3 ~ 0.5V
47 Sensor ground Idle DC -0.3 ~ 0.5V
48 -      
49 -      
50 -      
51 -      
52 -      
53 Main Relay control output Relay OFF DC Battery Voltage
Relay ON -0.3 ~ 1.2V
54 -      
55 -      
56 Injector (Cylinder #4) (High) control output Engine Running PWM
G07381626
57 Injector (Cylinder #4) (Low) control output Engine Running Pulse
G07381627
58 Battery power (B+) IG OFF DC Max. 1.0V
IG ON Battery Voltage
59 -      
60 CAN (Low) Recessive Pulse 2.0 ~ 3.0V
Dominant 2.75 ~ 4.5V
61 -      
62 Knock Sensor (KS) signal input Knocking Variable Frequency -0.3 ~ 0.3V
Normal 0V
63 Clutch Switch signal input S/W OFF DC Battery Voltage
S/W ON -0.3 ~ 0.5V
64 -      
65 -      
66 -      
67 -      
68 Variable Intake Solenoid (VIS) Valve control output Active DC Max. 1.0V
Inactive Battery Voltage
69 Starter Relay control output Relay OFF DC Battery Voltage
Relay ON -0.3 ~ 1.2V
70 Fuel Pump Relay control output Relay OFF DC Battery Voltage
Relay ON -0.3 ~ 1.2V
71 Engine speed signal output Engine Running Frequency High: Battery Voltage
Low: -0.3 ~ 1.0V
Frequency: 21Hz (Idle), 100Hz (3, 000 RPM)
72 -      
73 Injector (Cylinder #1) (High) control output Engine Running PWM
G07381628
74 Injector (Cylinder #1) (Low) control output Engine Running Pulse
G07381629
75 Battery power (B+) IG OFF DC Max. 1.0V
IG ON Battery Voltage
76 -      
77 CAN (High) Recessive Pulse 2.0 ~ 3.0V
Dominant 2.75 ~ 4.5V
78 Vehicle speed signal input      
79 -      
80 -      
81 -      
82 Starter Control Switch signal input S/W OFF DC -0.3 ~ 0.5V
S/W ON Battery Voltage
83 -      
84 CVVT Oil Control Valve (OCV) (Bank 1/Exhaust) control output Idle Pulse High: Battery Voltage
Low: -0.3 ~ 1.0V
Frequency: 300Hz
85 CVVT Oil Control Valve (OCV) (Bank 1/Intake) control output Idle Pulse High: Battery Voltage
Low: -0.3 ~ 1.0V
Frequency: 300Hz
86 Purge Control Solenoid Valve (PCSV) control output Inactive Active Pulse High: Battery Voltage
Low: Max. 1.0V
Vpeak: 42.0 ~ 60.0V
Frequency: 20Hz
87 Canister Close Valve (CCV) control output Active Inactive Pulse High: Battery Voltage
Low: Max. 1.0V
Vpeak: 42.0 ~ 60.0V
88 Heated Oxygen Sensor (HO2S) (Bank 1/Sensor 1) Heater control output Engine Running Pulse High: Battery Voltage
Low: -0.3 ~ 1.0V
Frequency: 8 ~ 10Hz
Duty: 0 ~ 100%
89 Heated Oxygen Sensor (HO2S) (Bank 1/Sensor 2) Heater control output Engine Running Pulse High: Battery Voltage
Low: -0.3 ~ 1.0V
Frequency: 8 ~ 10Hz
Duty: 0 ~ 100%
90 Fuel Pressure Regulator Valve (High) control output Engine Running PWM
G07381630
91 Fuel Pressure Regulator Valve (Low) control output Engine Running Pulse
G07381631
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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