Terminals Of ECM [10/2017 - 09/2019]

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HINT: 

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

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

1. WAVEFORM 1 

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   CAN COMMUNICATION SIGNAL (REFERENCE)
   
   

   ECM Terminal Name	Between CAN+ and E1, or CANH and E1
   Tester Range	1 V/DIV., 10 μs./DIV.
   Condition	Engine stopped, power switch on (IG)

   HINT: 

   The waveform varies depending on the CAN communication signal.

2. WAVEFORM 2 

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   CAN COMMUNICATION SIGNAL (REFERENCE)
   
   

   ECM Terminal Name	Between CAN- and E1, or CANL and E1
   Tester Range	1 V/DIV., 10 μs./DIV.
   Condition	Engine stopped, power switch on (IG)

   HINT: 

   The waveform varies depending on the CAN communication signal.

3. WAVEFORM 3 

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   CRANKSHAFT REVOLUTION SIGNAL FROM ECM TO INVERTER WITH CONVERTER ASSEMBLY
   
   

   ECM Terminal Name	Between NEO and E1
   Tester Range	5 V/DIV., 20 ms./DIV.
   Condition	Idling with warm engine

   HINT: 

   The wavelength becomes shorter as the engine speed increases.

4. WAVEFORM 4 

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   ENGINE SPEED SIGNAL
   
   

   ECM Terminal Name	Between TACH and E1
   Tester Range	5 V/DIV., 10 ms./DIV.
   Condition	Idling with warm engine

   HINT: 

   The wavelength becomes shorter as the engine speed increases.

5. WAVEFORM 5 

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   CAMSHAFT REVOLUTION SIGNAL FROM ECM TO INVERTER WITH CONVERTER ASSEMBLY
   
   

   ECM Terminal Name	Between G2O and E1
   Tester Range	5 V/DIV., 20 ms./DIV.
   Condition	Idling with warm engine

6. WAVEFORM 6 

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   FUEL LID OPERATION SIGNAL FOR COMBINATION METER ASSEMBLY
   
   

   ECM Terminal Name	Between LSTM and E1
   Tester Range	5 V/DIV., 20 ms./DIV.
   Condition	Multi-information display displaying "Please Wait Now Opening"

7. WAVEFORM 7 

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   FUEL LID OPERATION SIGNAL FOR COMBINATION METER ASSEMBLY
   
   

   ECM Terminal Name	Between LSTM and E1
   Tester Range	5 V/DIV., 20 ms./DIV.
   Condition	Multi-information display displaying "Close Fuel Lid"

8. WAVEFORM 8 

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   FUEL LID OPERATION SIGNAL FOR COMBINATION METER ASSEMBLY
   
   

   ECM Terminal Name	Between LSTM and E1
   Tester Range	5 V/DIV., 20 ms./DIV.
   Condition	Multi-information display displaying "Refuel Ready"

9. WAVEFORM 9 

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   COOLING FAN CONTROL SIGNAL
   
   

   ECM Terminal Name	Between RFC and E1
   Tester Range	1 V/DIV., 20 ms./DIV.
   Condition	Power switch on (IG), A/C ON (MAX Cool)

   HINT: 

   The duty ratio varies depending on the engine coolant temperature.

10. WAVEFORM 10 

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    CAM TIMING OIL CONTROL SOLENOID ASSEMBLY OPERATION SIGNAL
    
    

    ECM Terminal Name	Between OC1+ and OC1-, or OC2+ and OC2-
    	Between OE1+ and OE1-, or OE2+ and OE2-
    Tester Range	5 V/DIV., 1 ms./DIV.
    Condition	Idling

11. WAVEFORM 11 

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    EGR VALVE ASSEMBLY SIGNAL (EGR2, EGR4)
    
    

    ECM Terminal Name	CH1: EGR2 and E1 CH2: EGR4 and E1
    Tester Range	10 V/DIV., 20 ms./DIV.
    Condition	EGR valve assembly operating

12. WAVEFORM 12 

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    EGR VALVE ASSEMBLY SIGNAL (EGR1, EGR3)
    
    

    ECM Terminal Name	CH1: EGR1 and E1 CH2: EGR3 and E1
    Tester Range	10 V/DIV., 20 ms./DIV.
    Condition	EGR valve assembly operating

13. WAVEFORM 13 

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    AIR FUEL RATIO SENSOR (SENSOR 1) HEATER OPERATION SIGNAL
    
    

    ECM Terminal Name	Between HA1A and E04, or HA2A and E05
    Tester Range	5 V/DIV., 10 ms./DIV.
    Condition	Idling with cold engine

14. WAVEFORM 14 

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    IGNITION COIL ASSEMBLY SIGNAL (IGT AND IGF SIGNAL)
    
    

    ECM Terminal Name	CH1: IGT1, 3 or 5 and E1 CH2: IGF1 and E1
    	CH1: IGT2, 4 or 6 and E1 CH2: IGF2 and E1
    Tester Range	2 V/DIV., 20 ms./DIV.
    Condition	Idling with warm engine

15. WAVEFORM 15 

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    FUEL INJECTOR ASSEMBLY (FOR PORT INJECTION) SIGNAL
    
    

    ECM Terminal Name	Between #10 (to #60) and E01
    Tester Range	20 V/DIV., 20 ms./DIV.
    Condition	Idling with warm engine

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

16. WAVEFORM 16 

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    THROTTLE ACTUATOR NEGATIVE TERMINAL SIGNAL
    
    

    ECM Terminal Name	Between M- and ME01
    Tester Range	5 V/DIV., 1 ms./DIV.
    Condition	Idling with warm engine

    HINT: 

    The duty ratio varies depending on the throttle actuator operation.

17. WAVEFORM 17 

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    THROTTLE ACTUATOR POSITIVE TERMINAL SIGNAL
    
    

    ECM Terminal Name	Between M+ and ME01
    Tester Range	5 V/DIV., 1 ms./DIV.
    Condition	Idling with warm engine

    HINT: 

    The duty ratio varies depending on the throttle actuator operation.

18. WAVEFORM 18 

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    PURGE VSV OPERATION SIGNAL
    
    

    ECM Terminal Name	Between PRG and E1
    Tester Range	10 V/DIV., 20 ms./DIV.
    Condition	Idling with warm engine, under purge control

    HINT: 

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

19. WAVEFORM 19 

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    KNOCK CONTROL SENSOR SIGNAL
    
    

    ECM Terminal Name	Between KNK1 and EKNK, or KNK2 and EKN2
    Tester Range	1 V/DIV., 1 ms./DIV.
    Condition	Engine speed maintained at 2500 rpm after warming up engine

    HINT: 

    • The wavelength becomes shorter as the engine speed increases.
    • The waveforms and amplitudes displayed will differ slightly depending on the vehicle.
20. WAVEFORM 20 

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    MASS AIR FLOW METER SUB-ASSEMBLY SIGNAL
    
    

    ECM Terminal Name	Between VG and E2G
    Tester Range	1 V/DIV., 100 μs./DIV.
    Condition	Power switch on (IG)

21. WAVEFORM 21 

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    CRANKSHAFT POSITION SENSOR SIGNAL
    
    

    ECM Terminal Name	Between NE+ and NE-
    Tester Range	2 V/DIV., 20 ms./DIV.
    Condition	Idling with warm engine

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

22. WAVEFORM 22 

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    VVT SENSOR (FOR INTAKE CAMSHAFT) SIGNAL
    
    

    ECM Terminal Name	CH1: Between VV1+ and VV1- CH2: Between VV2+ and VV2-
    Tester Range	5 V/DIV., 20 ms./DIV.
    Condition	Idling with warm engine

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

23. WAVEFORM 23 

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    VVT SENSOR (FOR EXHAUST CAMSHAFT) SIGNAL
    
    

    ECM Terminal Name	CH1: Between EV1+ and EV1- CH2: Between EV2+ and EV2-
    Tester Range	5 V/DIV., 20 ms./DIV.
    Condition	Idling with warm engine

    HINT: 

    The wavelength becomes shorter as the engine water pump speed increases.