Engine Control Module (ECM)

Circuit Diagrams

ECM Terminal and Input/Output Signal

ECM Terminal Function

Connector [A]

Connector [B]

ECM Terminal Input/Output Signal

Connector [A]

Connector [B]

Pin No.	Description	Condition	Type	Level
1	ECM Ground	Idle	DC	-0.3 - 0.5 V
2	ECM Ground	Idle	DC	-0.3 - 0.5 V
3	Battery Power (B+)	IG OFF	DC	Max. 1.0 V
		IGNITION ON		Battery voltage (B+)
4	ECM Ground	Idle	DC	-0.3 - 0.5 V
5	Battery Power (B+)	IG OFF	DC	Max. 1.0 V
		IGNITION ON		Battery voltage (B+)
6	Battery Power (B+)	IG OFF	DC	Max. 1.0 V
		IGNITION ON		Battery voltage (B+)
7	-
8	FlexRay Communication Signal Input [High]
9	-
10	Brake Switch Signal Input [Test]	Brake Off	DC	Battery voltage (B+)
		Brake ON		Max. 0.5 V
11	-
12	-
13	Electrical Load Signal Input	Light OFF	DC	Battery voltage (B+)
		Light ON		-0.3 - 0.5 V
14	Immobilizer Communication Line
15	-
16	Main Relay Control Output	Relay OFF	DC	Battery voltage (B+)
		Relay ON		-0.3 - 1.2 V
17	-
18	Purge Control Solenoid Valve (PCSV) Control Output	Inactive Active	Pulse	High: Battery Voltage (B+)
				Low: Max. 1.0 V
				Vpeak: 42.0–60.0 V
				Frequency: 20 Hz
19	E-CVVT Relay Control Output
20	-
21	-
22	Injector (Cylinder No. 2) [High] Control Output	Engine Running	PWM
23	Injector (Cylinder No. 2) [Low] Control Output	Engine Running	Pulse
24	-
25	FlexRay Communication [Low] Signal Input
26	-
27	Brake Switch [Lamp] Input Signal	Brake Off	DC	Max. 0.5 V
		Brake ON		Battery voltage (B+)
28	-
29	-
30	Air Conditioning Pressure Sensor (APT) Signal Input
31	Fuel Tank Pressure Sensor (FTPS) Signal Input	Idle	Analog	-0.3 - 5.2 V
32	LIN Communication Input Signal
33	Fuel Pump Relay Control Output	Relay OFF	DC	Battery voltage (B+)
		Relay ON		-0.3 - 1.2 V
34	Starter Control Output	Relay OFF	DC	Battery voltage (B+)
		Relay ON		-0.3 - 1.2 V
35	Cooling Fan Relay [High] Control Output	Relay OFF	DC	Battery voltage (B+)
		Relay ON		Max. 1.0 V
36	-
37	-
38	Canister Close Valve (CCV) Control Output	Inactive Active	Pulse	High: Battery Voltage (B+)
				Low: Max. 1.0 V
				Vpeak: 42.0–60.0 V
39	Injector (Cylinder No. 3) [High] Control Output	Engine Running	PWM
40	Injector (Cylinder No. 3) [Low] Control Output	Engine is running	Pulse
41	Battery Power (B+)	IG OFF	DC	Max. 1.0 V
		IGNITION ON		Battery voltage (B+)
42	-
43	-
44	Sensor Ground	Idle	DC	-0.3 - 0.5 V
45	-
46	Sensor Ground	Idle	DC	-0.3 - 0.5 V
47	Sensor Ground	Idle	DC	-0.3 - 0.5 V
48	Sensor Ground	Idle	DC	-0.3 - 0.5 V
49	-
50	Sensor Ground	Idle	DC	-0.3 - 0.5 V
52	-
51	-
53	-
54	Engine Speed Output Signal	Engine is running	Frequency	High: Battery Voltage (B+)
				Low: -0.3 - 1.0 V
				Frequency: 21 Hz (idle), 100 Hz (3000 rpm)
55	-
56	Injector (Cylinder No. 4) [High] Control Output	Engine is running	PWM
57	Injector (Cylinder No. 4) [Low] Control Output	Engine is running	Pulse
58	Heated Oxygen Sensor Input Signal [Bank 1/Sensor 2]	Idle	DC	Rich: 0.6 - 1.0 V
				Lean: Max. 0.4 V
59	-
60	CAN [Low]	Recessive	Pulse	2.0–3.0 V
		Dominant		2.75 - 4.5 V
61	Starter signal input	PO OFF	DC	-0.3 - 0.5 V
		B/V ON		Battery voltage (B+)
62	-
63	-
64	Accelerator Pedal Position Sensor (APS) 2 Signal Input	THA	Analog	Max. 1.0 V
		THW		1.5 - 3.0 V
65	Accelerator Pedal Position Sensor (APS) 1 Signal Input	THA	Analog	Max. 1.0 V
		THW		Min. 4.0 V
66	-
67	-
68	-
69	-
70	-
71	Cooling Fan Relay [Low] Control Output	Relay OFF	DC	Battery voltage (B+)
		Relay ON		-0.3 - 1.2 V
72	-
73	Injector (Cylinder No. 1) [High] Control Output	Engine Running	PWM
74	Injector (Cylinder No. 1) [Low] Control Output	Engine Running	Pulse
75	Battery Power (B+)	IG OFF	DC	Max. 1.0 V
		IGNITION ON		Battery voltage (B+)
76	-
77	CAN [High]	Recessive	Pulse	2.0–3.0 V
		Dominant		2.75 - 4.5 V
78	Vehicle signal input
79	Sensor Power Supply (+5V)	IG OFF	DC	Max. 0.5 V
		IGNITION ON		4.75 - 5.25 V
80	-
81	Sensor Power Supply (+5V)	IG OFF	DC	Max. 0.5 V
		IGNITION ON		4.75 - 5.25 V
82	Sensor Power Supply (+5V)	IG OFF	DC	Max. 0.5 V
		IGNITION ON		4.75 - 5.25 V
83	-
84	Fuel Level Sensor
85	-
86	CVVT Oil Control Valve (OCV) [Bank 1/Intake] control output	Idle	Pulse	High: Battery Voltage (B+)
				Low: -0.3 - 1.0 V
				Frequency: 300 Hz
87	-
88	Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 1] Heater control output	Engine Running	Pulse	High: Battery Voltage (B+)
				Low: -0.3 - 1.0 V
				Frequency: 8 - 10 Hz
				Duty Cycle: 0 - 100%
89	Heated Oxygen Sensor (HO2S) [Bank 1/Sensor 2] Heater control output	Engine Running	Pulse	High: Battery Voltage (B+)
				Low: -0.3 - 1.0 V
				Frequency: 8 - 10 Hz
				Duty Cycle: 0 - 100%
90	Fuel Pressure Regulator Control Valve output [High]	Engine Running	PWM
91	Fuel Pressure Regulator Control Valve output [Low]	Engine Running	Pulse

Repair Procedures

Removal

1. 1

   Turn the ignition switch OFF and disconnect the negative (-) battery terminal.

2. 2

   Remove the engine side cover (A).

   

3. 3

   Disconnect the ECM connector (A).

   

4. 4

   Remove the ECM bracket assembly by loosening the mounting bolt (A) and nuts (B).

   Engine Control Module mounting bolt/nut:

   9,8–11.8 N·m

   

5. 5

   Remove the ECM (B) by loosening the mounting nuts (A).

   ECM bracket mounting bolt/nut:

   9,8–11.8 N·m

   

   

Installation

1. Install in the reverse order of removal.

ECM Circuit Inspection Procedure

1. 1

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

   Specification: Below 1 Ω

2. 2

   ECM CONNECTOR INSPECTION: Disconnect the ECM connector and visually inspect the ground terminals on the ECM side and the harness side for bent pins or poor contact pressure. If a problem is found, repair it.

3. 3

   If the problem is not found in steps 1 and 2, the ECM may be faulty. In this case, before replacing the ECM with a new one, make sure there are no DTCs. Then recheck the vehicle. If DTCs are present, inspect them before replacing the ECM.

4. 4

   RECHECK THE ORIGINAL ECM: Install the original ECM (possibly 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 Problem Check Procedure" in "Basic Inspection" Procedure.)

Adjustment

ECM Neutral Mode Procedure (with Immobilizer)

• After replacing the ECM on a vehicle with an immobilizer system, the following procedure must be performed.

1. 1

   Perform the "ECM Neutral Mode" procedure using the KDS.

   (Refer to "Body Electrical System - Immobilizer System - Repair Procedures")

2. 2

   After completing "ECM Neutral Mode", perform the "Key Learning" procedure using the KDS.

   (Refer to "Body Electrical System - Immobilizer System - Repair Procedures")

ECM Neutral Mode Procedure (with Smart Key)

• After replacing the ECM on a vehicle with a smart key system (push button start), the following procedure must be performed.

1. 1

   Perform the "ECM Neutral Mode" procedure using the KDS.

   (Refer to "Body Electrical System - Electronic Key System - Repair Procedures")

2. 2

   After completing the "ECM Neutral Mode", turn the ignition on and then off using the smart key or start button. The ECM automatically learns the smart key information.

   (Refer to "Body Electrical System - Electronic Key System - Repair Procedures")

ETC Module Learning Procedure

Perform the ETC module learning procedure after replacing the ETC module.

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

TCM Learning Procedure

Perform TCM learning after replacing the PCM.

(Refer to "Automatic Transmission Control System - Adjustment")

VIN Programming Procedure

The VIN (Vehicle Identification Number) is the number containing vehicle information (manufacturer, vehicle type, model line/series, body type, engine type, transmission type, model year, plant location, etc. For more information, refer to the "GI" group in this SERVICE MANUAL.) When replacing the ECM, the VIN must be programmed into the ECM. If the VIN is missing from ECM memory, DTC P0630 will be set.

1. 1

   Select the "VIN Write" function in "Vehicle Software Management."

2. 2

   Select "Write VIN" in the "Identification Registration" menu.

   

3. 3

   Enter the VIN.