Terminals Of ECM [11/2015 - 08/2019]

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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 
   Fig 1: WAVEFORM 1

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   CAN COMMUNICATION SIGNAL (REFERENCE)
   
   

   ECM Terminal Name	Between CANH and E1 Between CAN+ 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 
   Fig 2: WAVEFORM 2

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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"

3. WAVEFORM 3 
   Fig 3: WAVEFORM 3

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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"

4. WAVEFORM 4 
   Fig 4: WAVEFORM 4

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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"

5. WAVEFORM 5 
   Fig 5: WAVEFORM 5

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   CAN COMMUNICATION SIGNAL (REFERENCE)
   
   

   ECM Terminal Name	Between CANL and E1 Between CAN- 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.

6. WAVEFORM 6 
   Fig 6: WAVEFORM 6

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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.

7. WAVEFORM 7 
   Fig 7: WAVEFORM 7

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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.

8. WAVEFORM 8 
   Fig 8: WAVEFORM 8

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   AIR FUEL RATIO SENSOR HEATER OPERATION SIGNAL
   
   

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

9. WAVEFORM 9 
   Fig 9: WAVEFORM 9

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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.

10. WAVEFORM 10 
    Fig 10: WAVEFORM 10

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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.

11. WAVEFORM 11 
    Fig 11: WAVEFORM 11

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    CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY OPERATION SIGNAL
    
    

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

12. WAVEFORM 12 
    Fig 12: WAVEFORM 12

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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.

13. WAVEFORM 13 
    Fig 13: WAVEFORM 13

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    ENGINE WATER PUMP ASSEMBLY SIGNAL (FROM ENGINE WATER PUMP ASSEMBLY TO ECM)
    
    

    ECM Terminal Name	Between WPI and E1
    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.

14. WAVEFORM 14 
    Fig 14: WAVEFORM 14

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    ENGINE WATER PUMP ASSEMBLY SIGNAL (FROM ECM TO ENGINE WATER PUMP ASSEMBLY)
    
    

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

    HINT: 

    The duty ratio varies depending on the engine water pump assembly speed.

15. WAVEFORM 15 
    Fig 15: WAVEFORM 15

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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

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

16. WAVEFORM 16 
    Fig 16: WAVEFORM 16

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    IGNITION COIL ASSEMBLY SIGNAL (IGT AND IGF SIGNAL)
    
    

    ECM Terminal Name	CH1: Between IGT (1 to 4) and E1 CH2: Between IGF1 and E1
    Tester Range	2 V/DIV., 20 ms./DIV.
    Condition	Idling with warm engine

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

17. WAVEFORM 17 
    Fig 17: WAVEFORM 17

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    CAMSHAFT POSITION SENSOR SIGNAL
    
    

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

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

18. WAVEFORM 18 
    Fig 18: WAVEFORM 18

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    NO. 1 (TO NO. 4) FUEL INJECTOR ASSEMBLY SIGNAL
    
    

    ECM Terminal Name	Between #10 (to #40) 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.

19. WAVEFORM 19 
    Fig 19: WAVEFORM 19

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    HEATED OXYGEN SENSOR SIGNAL
    
    

    ECM Terminal Name	Between OX1B and EX1B
    Tester Range	0.2 V/DIV., 200 ms./DIV.
    Condition	Engine speed maintained at 2500 rpm for 2 minutes after warming up engine

    HINT: 

    Data List item "O2 Sensor Voltage B1S2" shows the ECM values from the heated oxygen sensor.

20. WAVEFORM 20 
    Fig 20: WAVEFORM 20

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    EGR VALVE ASSEMBLY SIGNAL
    
    

    ECM Terminal Name	Between EGR (1 to 4) and E1
    Tester Range	20 V/DIV., 50 ms./DIV.
    Condition	EGR valve assembly operating

21. WAVEFORM 21 
    Fig 21: WAVEFORM 21

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    CRANKSHAFT POSITION SENSOR SIGNAL
    
    

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

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

22. WAVEFORM 22 
    Fig 22: WAVEFORM 22

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    KNOCK CONTROL SENSOR SIGNAL
    
    

    ECM Terminal Name	Between KNK1 and EKNK
    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.