Terminals Of ECM

Fig 1: A53 And E83 ECM Connector Terminal Identification

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HINT: 

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

1. WAVEFORM 1 
   Fig 2: Identifying Waveform 1

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   CAMSHAFT TIMING OIL CONTROL VALVE (OCV):
   
   

   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 msec./DIV.
   Condition	Power switch ON (IG)

2. WAVEFORM 2 
   Fig 3: Identifying Waveform 2

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   HEATED OXYGEN SENSOR:
   
   

   ECM Terminal Name	Between OX1B and O1B- or OX2B and O2B-
   Tester Range	0.2 V/DIV., 200 msec./DIV.
   Condition	Engine speed maintained at 2500 rpm for 2 minutes after warming up engine

   HINT: 

   In Data List, item O2S B1S2, O2S B2S2 shows the ECM input values from the heated oxygen sensor.

3. WAVEFORM 3 
   Fig 4: Identifying Waveform 3

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   FUEL INJECTOR (FOR DIRECT INJECTION) NO. 1 (TO NO. 6) INJECTION SIGNAL:
   
   

   ECM Terminal Name	Between #1D (to #6D) and E1
   Tester Range	2 V/DIV., 20 msec./DIV.
   Condition	Idling

   HINT: 

   • The wavelength becomes shorter as the engine rpm increases.
   • When the direct injection injectors are operating, Direct is displayed for Injection Way of the Data List.
4. WAVEFORM 4 
   Fig 5: Identifying Waveform 4

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   KNOCK SENSOR:
   
   

   ECM Terminal Name	Between KNK1 and EKNK Between KNK2 and EKN2
   Tester Range	0.01 to 10 V/DIV., 0.01 to 10 msec./DIV.
   Condition	Engine speed maintained at 4000 rpm after warming up engine

   HINT: 

   • The wavelength becomes shorter as the engine rpm increases.
   • The waveforms and amplitudes displayed differ slightly depending on the vehicle.
5. WAVEFORM 5 
   Fig 6: Identifying Waveform 5

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   CRANKSHAFT POSITION SENSOR AND VVT SENSOR FOR INTAKE CAMSHAFT:
   
   

   ECM Terminal Name	Between NE+ and NE- Between VV1+ and VV1- or VV2+ and VV2-
   Tester Range	5 V/DIV., 20 msec./DIV.
   Condition	Idling

   HINT: 

   The wavelength becomes shorter as the engine rpm increases.

6. WAVEFORM 6 
   Fig 7: Identifying Waveform 6

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   CRANKSHAFT POSITION SENSOR AND VVT SENSOR FOR EXHAUST CAMSHAFT:
   
   

   ECM Terminal Name	Between NE+ and NE- Between EV1+ and EV1- or EV2+ and EV2-
   Tester Range	5 V/DIV., 20 msec./DIV.
   Condition	Idling

   HINT: 

   The wavelength becomes shorter as the engine rpm increases.

7. WAVEFORM 7 
   Fig 8: Identifying Waveform 7

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

   ECM Terminal Name	Between IGT (1 to 6) and E1 Between IGF1 and E1 or IGF2 and E1
   Tester Range	2 V/DIV., 20 msec./DIV.
   Condition	Idling

   HINT: 

   The wavelength becomes shorter as the engine rpm increases.

8. WAVEFORM 8 
   Fig 9: Identifying Waveform 8

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   PURGE VSV:
   
   

   ECM Terminal Name	Between PRG and E1
   Tester Range	5 V/DIV., 50 msec./DIV.
   Condition	Idling

   HINT: 

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

9. WAVEFORM 9 
   Fig 10: Identifying Waveform 9

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   THROTTLE ACTUATOR POSITIVE TERMINAL:
   
   

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

   HINT: 

   The duty ratio varies depending on the throttle actuator operation.

10. WAVEFORM 10 
    Fig 11: Identifying Waveform 10

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    THROTTLE ACTUATOR NEGATIVE TERMINAL:
    
    

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

    HINT: 

    The duty ratio varies depending on the throttle actuator operation.

11. WAVEFORM 11 
    Fig 12: Identifying Waveform 11

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    ENGINE SPEED SIGNAL:
    
    

    ECM Terminal Name	Between TACH and E1
    Tester Range	5 V/DIV., 10 msec./DIV.
    Condition	Idling

    HINT: 

    The wavelength becomes shorter as the engine rpm increases.

12. WAVEFORM 12 
    Fig 13: Identifying Waveform 12

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    FUEL INJECTOR (FOR DIRECT INJECTION) NO. 1 (TO NO. 6) INJECTION SIGNAL AND INJECTION CONFIRMATION SIGNAL:
    
    

    ECM Terminal Name	CH1: Between #1D (to #6D) and E1 CH2: Between INJF, IJF2, IJF3 and E1
    Tester Range	2 V/DIV., 20 msec./DIV.
    Condition	Idling

    HINT: 

    • The wavelength becomes shorter as the engine rpm increases.
    • When the direct injection injectors are operating, Direct is displayed for Injection Way of the Data List.
13. WAVEFORM 13 
    Fig 14: Identifying Waveform 13

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    FUEL PUMP FOR HIGH PRESSURE (SPILL CONTROL VALVE):
    
    

    ECM Terminal Name	CH1: Between FPD and E1 CH2: Between FPF1 and E1
    Tester Range	2 V/DIV., 5 msec./DIV.
    Condition	Idling

14. WAVEFORM 14 
    Fig 15: Identifying Waveform 14

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    CAN COMMUNICATION SIGNAL:
    
    

    ECM Terminal Name	Between CANH and E1 Between CAN+ and E1
    Tester Range	1 V/DIV., 10 μsec./DIV.
    Condition	Power switch ON (IG)

    HINT: 

    The waveform varies depending on the CAN communication signal.

15. WAVEFORM 15 
    Fig 16: Identifying Waveform 15

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    CAN COMMUNICATION SIGNAL:
    
    

    ECM Terminal Name	Between CANL and E1 Between CAN- and E1
    Tester Range	1 V/DIV., 10 μsec./DIV.
    Condition	Power switch ON (IG)

    HINT: 

    The waveform varies depending on the CAN communication signal.

16. WAVEFORM 16 
    Fig 17: Identifying Waveform 16

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    FUEL INJECTOR (FOR PORT INJECTION) NO. 1 (TO NO. 6) INJECTION SIGNAL:
    
    

    ECM Terminal Name	Between #1P (to #6P) and E1
    Tester Range	50 V/DIV., 400 μsec./DIV.
    Condition	Idling

    HINT: 

    • The wavelength becomes shorter as the engine rpm increases.
    • When the port injection injectors are operating, Port is displayed for Injection Way of the Data List.
17. WAVEFORM 17 
    Fig 18: Identifying Waveform 17

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    COOLING FAN ECU SIGNAL:
    
    

    ECM Terminal Name	Between RFC and E1
    Tester Range	1 V/DIV., 20 msec./DIV.
    Condition	Idling with A/C ON

18. WAVEFORM 18 
    Fig 19: Identifying Waveform 18

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    CAMSHAFT REVOLUTION SIGNAL FROM ECM TO HV CONTROL ECU OR MG ECU:
    
    

    ECM Terminal Name	Between GO1 and E1 Between GO2 and E1
    Tester Range	5 V/DIV., 20 msec./DIV.
    Condition	Camshaft revolution signal

    HINT: 

    The wavelength becomes shorter as the engine rpm increases.

19. WAVEFORM 19 
    Fig 20: Identifying Waveform 19

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    CRANKSHAFT REVOLUTION SIGNAL FROM ECM TO HV CONTROL ECU:
    
    

    ECM Terminal Name	Between NEO1 and E1
    Tester Range	5 V/DIV., 1 msec./DIV.
    Condition	Crankshaft revolution signal

    HINT: 

    The wavelength becomes shorter as the engine rpm increases.