1. ECM HARNESS CONNECTOR
2. ECM TERMINAL FUNCTION
[CONNECTOR C30-1]

PIN NO.

Description

Connected to

Remark

1

Ignition key switch signal

Ignition key

2

Not connected

-

3

Diagnostic data line

Data Link Connector (DLC)

4

ECM ground

Chassis ground

5

Power stages 1 ground

Chassis ground

6

Power stages 2 ground

Chassis ground

7

Battery voltage

Battery

8

Battery voltage after main relay

Main relay

9

Battery voltage after main relay

Main relay

[CONNECTOR C30-2]

PIN NO.

Description

Connected to

Remark

1

HO2S shield (B1/S1)

HO2S (B1/S1)

2

Not connected

-

3

Not connected

-

4

Not connected

-

5

Not connected

-

6

Not connected

-

7

HO2S shield (B1/S2)

HO2S (B1/S2)

8

HO2S shield (B1/S1)

HO2S (B1/S1)

9

HO2S shield (B2/S1)

HO2S (B2/S1)

10

HO2S shield (B1/S2)

HO2S (B1/S2)

11

HO2S shield (B2/S2)

HO2S (B2/S2)

12

Not connected

-

13

HO2S shield (B2/S1)

HO2S (B2/S1)

14

HO2S signal input (B1/S1)

HO2S (B1/S1)

15

HO2S signal input (B2/S1)

HO2S (B2/S1)

16

HO2S signal input (B1/S2)

HO2S (B1/S2)

17

Not connected

-

18

HO2S signal input (B2/S2)

HO2S (B2/S2)

19

HO2S shield (B2/S2)

HO2S (B2/S2)

20

HO2S ground (B1/S1)

HO2S (B1/S1)

21

HO2S ground (B2/S1)

HO2S (B2/S1)

22

HO2S ground (B1/S2)

HO2S (B1/S2)

23

Main relay

Main relay

24

HO2S ground (B2/S2)

HO2S (B2/S2)

[CONNECTOR C30-3]

PIN NO.

Description

Connected to

Remark

1

MAFS signal input

MAFS

2

Not connected

-

3

Not connected

-

4

Not connected

-

5

Not connected

-

6

Not connected

-

7

Not connected

-

8

CKPS signal input

CKPS

9

Not connected

-

10

TPS supply

TPS

11

Not connected

-

12

Not connected

-

13

Not connected

-

14

Not connected

-

15

Not connected

-

16

Not connected

-

17

MAFS ground

MAFS ground

18

Not connected

-

19

TPS signal input

TPS

20

TPS ground

TPS

21

CKPS ground

CKPS

22

IATS signal input

IATS

23

IATS ground

IATS

24

ECTS signal input

ECTS

25

ECTS ground

ECTS

26

Power steer'g load input

Power steering switch

27

Not connected

-

28

Not connected

-

29

Knock sensor1, input A (CYL 1/3/5)

Knock sensor1(CYL 1/3/5)

30

Knock sensor1, input B (CYL 1/3/5)

Knock sensor1(CYL 1/3/5)

31

Knock sensor2, input A (CYL 2/4/6)

Knock sensor2(CYL 2/4/6)

32

Knock sensor2, input B (CYL 2/4/6)

Knock sensor2(CYL 2/4/6)

33

Injector output (CYL.1)

Injector (CYL.1)

34

Injector output (CYL.2)

Injector (CYL.2)

35

Injector output (CYL.3)

Injector (CYL.3)

36

Injector output (CYL.4)

Injector (CYL.4)

37

Injector output (CYL.5)

Injector (CYL.5)

38

Injector output (CYL.6)

Injector (CYL.6)

39

Not connected

-

40

Not connected

-

41

Not connected

-

42

Canister purge sol. Valve control

Canister purge sol. Valve

43

Not connected

-

44

Not connected

-

45

VIS sol 1. Output

Variable Intake control System sol. 1

46

ISCA PWM output 2

ISCA

47

ISCA PWM output 1

ISCA

48

Knock sensor shield

Knock sensor

49

Not connected

-

50

Not connected

-

51

Not connected

-

52

VIS sol2. Output

Variable Intake control System sol. 2

[CONNECTOR C30-4]

PIN NO.

Description

Connected to

Remark

1

Not connected

MAFS

2

Not connected

-

3

Not connected

-

4

Not connected

-

5

Fuel level sender signal

Fuel level sender

6

Not connected

-

7

CMPS signal

CMPS

8

CMPS ground

CMPS

9

Not connected

-

10

Fuel pump relay control

Fuel pump relay

11

Not connected

-

12

Not connected

-

13

TPS PWM output

EPS, ECS

14

Not connected

-

15

Fuel level sender signal

Fuel level sender

16

Not connected

-

17

Engine speed signal

Tachometer(Cluster)

18

Fan low

Fan low relay

19

Not connected

-

20

MIL

MIL(Cluster)

21

Not connected

-

22

Wheel( or Vehicle) speed sensor signal

Wheel( or Vehicle) speed sensor

23

A/C comp. input(Low/High sw)

A/C comp

24

A/C switch input

A/C switch

25

A/C comp. input(middle sw)

A/C middle sw

26

Not connected

-

27

Not connected

-

28

Not connected

-

29

A/C comp. relay control

A/C comp. relay

30

Not connected

-

31

Not connected

-

32

Not connected

-

33

Not connected

-

34

Not connected

-

35

Not connected

-

36

CAN(High)

TCM, ESP, ABS, 4WD ECM

37

CAN(Low)

TCM, ESP, ABS, 4WD ECM

38

Wheel speed sensor ground

Wheel speed sensor

39

Wheel speed sensor signal

Wheel speed sensor

40

Fan high

Fan high relay

[CONNECTOR C30-5]

PIN

NO.

Description

Connected to

Remark

1

Ignition coil 3 output (CYL. 3, 6)

Ignition coil 3 (CYL. 3, 6)

2

Ignition coil 2 output (CYL. 2, 5)

Ignition coil 2 (CYL. 2, 5)

3

Ignition coil 1 output (CYL. 1, 4)

Ignition coil 1 (CYL. 1, 4)

4

Not connected

-

5

Ignition power stages ground

Chassis ground

6

Not connected

-

7

Not connected

-

8

Not connected

-

9

Not connected

-

3. ECM TERMINAL INPUT/OUTPUT SIGNAL
[CONNECTOR C30-1]

PIN NO.

Description

Vehicle State

Input, output value

Test Result

Type

Range

1

Ignition switch

IG ON

DC

Vbatt

14.19 V

IG OFF

0 ~ 0.5 Volt

0 mv

2

Not connected

3

Diagnosis line

(K-line)

IG ON

PULSE

High : 13.69 V

Low : 307 mv

speed : 10.365 kbps

4

ECM ground

ALWAYS

Static signal

0 ~ 0.5 Volt

5

Power stage1 ground

ALWAYS

Static signal

0 ~ 0.5 Volt

6

Power stage2 ground

ALWAYS

Static signal

0 ~ 0.5 Volt

7

Battery voltage

ALWAYS

DC

Battery Voltage

13.37 V

8

Battery voltage after main relay

IG ON

DC

Battery Voltage

14.15 V

IG OFF

0 ~ 0.5 Voltage

0 mV

9

Battery voltage after main relay

IG ON

DC

Battery Voltage

14.17 V

IG OFF

0 ~ 0.5 Voltage

0 mv

[CONNECTOR C30-2]

PIN NO.

Description

Vehicle State

Input, output value

Test Result

Type

Range

1

HO2S heater (B1/S1)

Engine

RUN

PWM

High : 14.19 V

Low : 400 mv

Frequency : 10.0 Hz

2

Not connected

3

Not connected

4

Not connected

5

Not connected

6

Not connected

7

HO2S heater (B1/S2)

Engine

RUN

PWM

Freq : 10 Hz

High : 14.19 V

Low : 400 mv

Frequency : 10.0 Hz

8

HO2S shield (B1/S1)

Static signal

0 Volt

9

HO2S shield (B2/S1)

Static signal

0 Volt

10

HO2S shield (B1/S2)

Static signal

0 Volt

11

HO2S shield (B2/S2)

Static signal

0 Volt

12

Not connected

13

HO2S geater (B2/S1)

Engine

RUN

PWM

Freq : 10Hz

High : 14.24 V

Low : 400 mv

Frequency : 10.0 Hz

14

HO2S input (B1/S1)

3000rpm after warm-up

PULSE

Freq:1.1 Hz

High : 0.8 V

Low : 400 mv

Frequency : 10.0 Hz

15

HO2S input (B2/S1)

3000 rpm after

warm-up

PULSE

Freq : 1.1 Hz

High : 0.8 V

Low : 100 mv

Frequency : 1.09 Hz

16

HO2S input (B1/S2)

Racing시

PULSE

Freq: 1.1 Hz

High : 0.8 V

Low : 100 mv

17

Fuel comsumption signal

18

HO2S input (B2/S2)

Racing

PULSE

Freq : 1.1 Hz

High : 0.8 V

Low : 100 mv

19

HO2S heater (B1/S2)

Engine

RUN

PWM

Freq : 10HZ

High : 14.01 V

Low : 400 mv

Frequency : 1.09 Hz

20

HO2S ground (B1/S1)

3000 rpm after

warm-up

PULSE

0 ~ 0.4 Volt

0 V

21

HO2S ground (B2/S1)

3000 rpm after

warm-up

PULSE

0 ~ 0.4 Volt

0 V

22

HO2S ground (B1/S2)

3000 rpm after

warm-up

PULSE

0 ~ 0.4 Volt

0 V

23

Main relay

IG OFF after

warm-up

DC

0 ~ 1 Volt

Vbatt

903 mV

13.47 V

24

HO2S ground (B2/S2)

3000 rpm after

warm-up

PLUSE

0 ~ 0.4 Volt

0 V

[CONNECTER C30-3]

PIN NO.

Description

Vehicle State

Input, output value

Test Result

Type

Range

1

MAFs signal input

IDLE

2000 rpm

Analog

0.5 Volt

1 Volt

High : 663 mV

Low : 1.54 mv

2

Not connected

3

Not connected

4

Not connected

5

Not connected

6

Not connected

7

Not connected

8

CKPS signal input

IDLE

3000 rpm

Frequency

600 ~ 900 Hz

2700 ~ 3300 Hz

High : 14.19 V

Low : 400 mv

IDLE : 705.94 HZ

3000rpm : 3028 HZ

9

Not connected

10

TPS Supply

After IG ON

DC

VCC

5.02 V

11

Not connected

12

Not connected

13

Not connected

14

Not connected

15

Not connected

16

Not connected

17

MAFS ground

Static signal

0 ~ 0.5 Volt

6.1 mV

18

Not connected

19

TPS signal input

IDLE

Wide open

Analog

0.25 ~ 0.8 Volt

4.25 ~ 4.7 Volt

304 mV

4.16 V

20

TPS ground

Static signal

0 ~ 0.5 Volt

5.2 mV

21

CKPS ground

Static signal

0 ~ 0.5 Volt

5.2 mV

22

Signal input

0°C

20°C

Analog

4.3 Volt

3.44 Volt

V

2.20 V

23

IATS ground

Static signal

0 ~ 0.5 Volt

3.4 mV

24

ECTS signal input

COLD(20℃)

WARM(80℃)

Analog

3.44 Volt

1.25 Volt

V

1.004 V

25

ECTS ground

Static signal

0 ~ 0.5 Volt

4.7 mV

26

POWER STEER'G

LOAD INPUT

ON

OFF

DC

0 ~ 0.5 Volt

Vbatt

-26 mV

11.55 V

27

Not connected

28

Not connected

29

Knock sensor1, input A

(CYL 2/4/6)

Knocking

Normal

Frequency

-0.3 ~ 0.3 Volt

0 Volt

224 mV

0 mV

30

Knock sensor2, input B

(CYL 1/3/5)

31

Knock sensor2, input B

(CYL 2/4/6)

Knocking

Normal

Frequency

-0.3 ~ 0.3 Volt

0 Volt

247 mV

0 mV

32

Knock sensor2, input B

(CYL 2/4/6)

33

Injector output(CYL.1)

IG ON

3000 rpm

DC

(PWM)

Freq : 20 ~ 30Hz

High : 14.01 V

Low : 185 mv

Idle : 5.86 Hz

3000rpm : 25.04 Hz

34

Injector output(CYL.2)

IG ON

3000 rpm

DC

(PWM)

Freq : 20 ~ 30Hz

High : 14.06 V

Low : 199 mv

Idle : 5.92 Hz

3000rpm : 25.13 Hz

35

Injector output(CYL.3)

IG ON

3000 rpm

DC

(PWM)

Freq : 20 ~ 30Hz

High : 14.06 V

Low : 199 mv

Idle : 5.84 Hz

3000rpm : 25.25 Hz

36

Injector output(CYL.4)

IG ON

3000 rpm

DC

(PWM)

Freq : 20 ~ 30Hz

High : 13.92V

Low : 185 mv

Idle : 5.87 Hz

3000rpm : 25.23 Hz

37

Injector output(CYL.5)

DC

(PWM)

Freq : 20 ~ 30Hz

High : 14.06 V

Low : 188 mv

Idle : 5.88 Hz

3000rpm : 25.14 Hz

38

Injector output(CYL.6)

DC

(PWM)

Freq : 20 ~ 30Hz

High : 14.06 V

Low : 199 mv

Idle : 5.92 Hz

3000rpm : 25.13 Hz

39

Not connected

40

Not connected

41

Not connected

42

Canister purge sol. v/v contorl

Inactive Active

(After warm up & racing)

PULSE

PWM

Freq:20Hz

High : 14.01 V

Low : 188 mv

Idle : 5.88 Hz

3000rpm : 25.14 Hz

43

Not connected

44

Not connected

45

VIS solenoid output

0 ~ 0.5 Volt

14 Volt

200 mV

14 V

46

ISCA PWM output2

Idle(close)

PWM

Freq:100Hz

High : 15.05 V

Low : 178 mv

Freq : 100 Hz

47

ISCA PWM output1

Idle(open)

PWM

Freq:100Hz

High : 14.82 V

Low : 151 mv

Freq : 100 Hz

48

Knock sensor shield

GND

0 ~ 0.5 Volt

49

Not connected

50

Not connected

51

Not connected

52

VIS solenoid2 output

ON

OFF

DC

0 ~ 0.5 Volt

14 Volt

200 mV

14 V

[CONNECTOR C30-4]

PIN NO.

Description

Vehicle State

Input, output value

Test Result

Type

Range

1

Not connected

2

Not connected

3

Not connected

4

Not connected

5

Fuel level sender signal

DC

0~Vcc

6

Not connected

7

CMPS signal input

IDLE

(after cranking)

Frequency

High : 5.02V

Low : 529mv

Idle : 5.84Hz

3000rpm : 25.14HZ

8

CMPS ground

Static signlal

0~0.5 Volt

9

Not connected

10

Fuel pump relay

IG SW ON

IDLE

DC

Vbatt

0~0.5 Volt

13.08 V

93 mV

11

Not connected

12

Not connected

13

TPS PWM output to EPS/ECS

C.T

W.O.T

Engine run

5% DUTY(C.T)

91% DUTY(W.O.T)

Freq:100Hz

High : 12.72V

Low : 88mv

Idle : 100.0Hz

C.T : 4.92%

WOT : 90.92%

14

Not connected

15

Fuel level sender ground

GND

0~0.5 Volt

16

Not connected

17

ENGINE

SPEED

SIGNAL

ENGINE

RUN

Frequency

High : 10.35V

Low : 13.6mv

Idle : 35.25Hz

3000rpm : 151.25HZ

18

FAN LOW RELAY

FAN ON

FAN OFF

DC

0~0.5 Volt

Vbatt

497 mV

13.95 V

19

Not connected

20

MIL

During IG ON after START

DC

0~0.5 Volt

Vbatt

16.4 mV

13.54 V

21

Not connected

22

Vehicle speed Sensor signal/

Wheel speed Sensor signal(ABS)

Vehicle

RUN

(80km/h)

PULSE

High : 5.02V

Low : 0.92mv

250Hz from ABS

252Hz

25Hz from VSP

Hz

23

A/C COMP.

SW(HI/LOW)

SW OFF

SW ON

DC

0~0.5 Volt

Vbatt

0.02V

12.22V

24

A/C SW

SW OFF

SW ON

DC

0~0.5 Volt

Vbatt

0 mV

12.45V

25

A/C COMP.

SW(MID)

SW OFF

SW ON

DC

0~0.5 Volt

Vbatt

0mV

12.22V

26

Not connected

27

Not connected

28

Not connected

29

A/CON COMP RESSOR RELAY

A/C ON

A/C OFF

DC

0~0.5 Volt

Vbatt

118mV

13.7V

30

Not connected

31

Not connected

32

Not connected

33

Not connected

34

Not connected

35

Not connected

36

CAN(HIGH)

Recessive

Dominant

DC

2.0~3.0Volt

2.75~4.5Volt

2.51V

3.56V

37

CAN(LOW)

Recessive

Dominant

DC

2.0~3.0Volt

0.5~2.25Volt

2.52V

1.51

38

Wheel speed sensor ground

Static signal

0V

39

Wheel speed sensor signal

Run Vehicle

40

Ran relay(high)

FAN OFF

DC

V batt

13.98V

[CONNECTOR C30-5]

PIN NO.

Description

Vehicle State

Input, output value

Test Result

Type

Range

1

Ignition Coil3(CYL.3/6)

ENGINE

RUN

PULSE

High : 14.03V

Low : 0.78V~1.13V

P/volt : 348V

Idle : 11.70Hz

3000rpm : 50.22HZ

2

Ignition Coil3(CYL.2/5)

ENGINE

RUN

PULSE

High : 13.98V

Low : 0.77V~1.13V

P/volt : 352V

Idle : 11.79Hz

3000rpm : 50.54HZ

3

Ignition Coil1(CYL.1/4)

ENGINE

RUN

PULSE

High : 14.07V

Low : 0.77V~1.09V

P/volt : 352V

Idle : 11.88Hz

3000rpm : 49.82HZ

4

Not connected

5

Ignition power stages ground

Static ground

0Volt

-0.2mV

6

Not connected

7

Not connected

8

Not connected

9

Not connected

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 (Resistance)

Between terminal 4 of C30-1 connector and chassis ground : 1Ω or less

Between terminal 5 of C30-1 connector and chassis ground : 1Ω or less

Between terminal 6 of C30-1 connector and chassis ground : 1Ω or less

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 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, replace the ECM with a new one, and then check the vehicle again. If the vehicle operates normally then the problem was likely with the 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 PROCEDURE in BASIC INSPECTION PROCEDURE)

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