Terminals Of ECM

Fig 1: ECM Connector Terminal Identification - SFI System

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HINT: 

The standard voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard voltage for that pair of terminals, displayed in the Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations.

HINT: 

*: The ECM terminal voltage is constant regardless of the output voltage from the sensor.

1. WAVEFORM 1 
   Fig 2: Identifying Waveform 1 Graph

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   CAMSHAFT TIMING OIL CONTROL VALVE (OCV)
   
   

   Terminal No. (Symbol)	Tool Setting	Condition
   B30-36 (OC1+) - B30-59 (OC1-)	5 V/DIV, 1 ms/DIV	Idling
   B30-35 (OE1+) - B30-58 (OE1-)	5 V/DIV, 1 ms/DIV	Idling

2. WAVEFORM 2 
   Fig 3: Identifying Waveform 2 Graph

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   AIR FUEL RATIO SENSOR (SENSOR 1) HEATER
   
   

   Terminal No. (Symbol)	Tool Setting	Condition
   B30-18 (HA1A) - B30-46 (E04)	5 V/DIV, 10 ms/DIV	Idling with warm engine

   HINT: 

   The wavelength varies in accordance with the engine operating condition.

3. WAVEFORM 3 
   Fig 4: Identifying Waveform 3 Graph

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   HEATED OXYGEN SENSOR (SENSOR 2)
   
   

   Terminal No. (Symbol)	Tool Setting	Condition
   B30-125 (OX1B) - B30-102 (O1B-)	0.2 V/DIV, 200 ms/DIV	Engine speed maintained at 2500 rpm for 2 minutes after warming up sensor

   HINT: 

   In the Data List, item O2S B1 S2 shows the ECM input values from the heated oxygen sensor.

4. WAVEFORM 4 
   Fig 5: Identifying Waveform 4 Graph

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   INJECTOR NO. 1 (TO NO. 4) INJECTION SIGNAL
   
   

   Terminal No. (Symbol)	Tool Setting	Condition
   B30-85 (#10) - B30-109 (E01)	20 V/DIV, 20 ms/DIV	Idling
   B30-84 (#20) - B30-109 (E01)	20 V/DIV, 20 ms/DIV	Idling
   B30-83 (#30) - B30-109 (E01)	20 V/DIV, 20 ms/DIV	Idling
   B30-82 (#40) - B30-109 (E01)	20 V/DIV, 20 ms/DIV	Idling

   HINT: 

   The wavelength becomes shorter as the engine speed increases.

5. WAVEFORM 5 
   Fig 6: Identifying Waveform 5 Graph

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   KNOCK SENSOR
   
   

   Terminal No. (Symbol)	Tool Setting	Condition
   B30-87 (KNK1) - B30-110 (EKNK)	1 V/DIV, 1 ms/DIV	Engine speed maintained at 4000 rpm after warming up engine

   HINT: 

   • The wavelength becomes shorter as the engine speed increases.
   • The waveforms and amplitudes displayed differ slightly depending on the vehicle.
6. WAVEFORM 6 
   Fig 7: Identifying Waveform 6 Graph

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   CAMSHAFT POSITION SENSOR
   
   

   Terminal No. (Symbol)	Tool Setting	Condition
   B30-76 (G2+) - B30-122 (G2-)	5 V/DIV, 20 ms/DIV	Idling
   B30-75 (EV1+) - B30-121 (EV1-)	5 V/DIV, 20 ms/DIV	Idling

   HINT: 

   The wavelength becomes shorter as the engine speed increases.

7. WAVEFORM 7 
   Fig 8: Identifying Waveform 7 Graph

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   CRANKSHAFT POSITION SENSOR
   
   

   Terminal No. (Symbol)	Tool Setting	Condition
   B30-74 (NE+) - B30-120 (NE-)	5 V/DIV, 20 ms/DIV	Idling

   HINT: 

   The wavelength becomes shorter as the engine speed increases.

8. WAVEFORM 8 
   Fig 9: Identifying Waveform 8 Graph

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   IGNITER IGT SIGNAL (FROM ECM TO IGNITER) AND IGNITER IGF SIGNAL (FROM IGNITER TO ECM)
   
   

   Terminal No. (Symbol)	Tool Setting	Condition
   B30-108 (IGT1) - B30-104 (E1)	2 V/DIV, 20 ms/DIV	Idling
   B30-107 (IGT2) - B30-104 (E1)	2 V/DIV, 20 ms/DIV	Idling
   B30-106 (IGT3) - B30-104 (E1)	2 V/DIV, 20 ms/DIV	Idling
   B30-105 (IGT4) - B30-104 (E1)	2 V/DIV, 20 ms/DIV	Idling
   B30-23 (IGF1) - B30-104 (E1)	2 V/DIV, 20 ms/DIV	Idling

   HINT: 

   The wavelength becomes shorter as the engine speed increases.

9. WAVEFORM 9 
   Fig 10: Identifying Waveform 9 Graph

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   PURGE VSV
   
   

   Terminal No. (Symbol)	Tool Setting	Condition
   B30-28 (PRG) - B30-104 (E1)	10 V/DIV, 20 ms/DIV	Idling

   HINT: 

   If the waveform is not similar to the illustration, check the waveform again after idling for 10 minutes or more.

10. WAVEFORM 10 
    Fig 11: Identifying Waveform 10 Graph

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    VEHICLE SPEED SIGNAL
    
    

    Terminal No. (Symbol)	Tool Setting	Condition
    A9-15 (SPD) - B30-104 (E1)	2 V/DIV, 20 ms/DIV	Vehicle driven at 20 km/h (12 mph)

    HINT: 

    • The wavelength becomes shorter as the vehicle speed increases.
    • Depending on the systems installed to the vehicle, the output voltage may rise to 12 V.
11. WAVEFORM 11 
    Fig 12: Identifying Waveform 11 Graph

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    THROTTLE ACTUATOR POSITIVE TERMINAL
    
    

    Terminal No. (Symbol)	Tool Setting	Condition
    B30-21 (M+) - B30-19 (ME01)	5 V/DIV, 1 ms/DIV	Idling with warm engine

    HINT: 

    The duty ratio varies depending on the throttle actuator operation.

12. WAVEFORM 12 
    Fig 13: Identifying Waveform 12 Graph

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    THROTTLE ACTUATOR NEGATIVE TERMINAL
    
    

    Terminal No. (Symbol)	Tool Setting	Condition
    B30-20 (M-) - B30-19 (ME01)	5 V/DIV, 1 ms/DIV	Idling with warm engine

    HINT: 

    The duty ratio varies depending on the throttle actuator operation.

13. WAVEFORM 13 
    Fig 14: Identifying Waveform 13 Graph

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    ENGINE SPEED SIGNAL
    
    

    Terminal No. (Symbol)	Tool Setting	Condition
    A9-26 (TACH) - B30-104 (E1)	5 V/DIV, 10 ms/DIV	Idling

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

14. WAVEFORM 14 
    Fig 15: Identifying Waveform 14 Graph

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    CAN COMMUNICATION SIGNAL (REFERENCE)
    
    

    Terminal No. (Symbol)	Tool Setting	Condition
    A9-13 (CANH) - B30-104 (E1)	1 V/DIV, 10 μs/DIV	Engine stopped and ignition switch ON

    HINT: 

    The waveform varies depending on the CAN communication signal.

15. WAVEFORM 15 
    Fig 16: Identifying Waveform 15 Graph

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    CAN COMMUNICATION SIGNAL (REFERENCE)
    
    

    Terminal No. (Symbol)	Tool Setting	Condition
    A9-5 (CANL) - B30-104 (E1)	1 V/DIV, 10 μs/DIV	Engine stopped and ignition switch ON

    HINT: 

    The waveform varies depending on the CAN communication signal.

16. WAVEFORM 16 
    Fig 17: Identifying Waveform 16 Graph

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    DC MOTOR FOR TCV POSITIVE TERMINAL
    
    

    Terminal No. (Symbol)	Tool Setting	Condition
    B30-4 (IA1+) - B30-109 (E01)	5 V/DIV, 1 ms/DIV	Idling with cold engine

17. WAVEFORM 17 
    Fig 18: Identifying Waveform 17 Graph

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    DC MOTOR FOR TCV NEGATIVE TERMINAL
    
    

    Terminal No. (Symbol)	Tool Setting	Condition
    B30-3 (IA1-) - B30-109 (E01)	5 V/DIV, 1 ms/DIV	Idling with cold engine