Terminals Of ECM

Fig 1: Identifying Connector Terminals Of ECM

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HINT: 

The standard normal voltage between each pair of the ECM terminals is shown in the table below. The appropriate conditions for checking each pair of the terminals are also indicated. The result of checks should be compared with the standard normal 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

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   CAMSHAFT TIMING OIL CONTROL VALVE (EXHAUST SIDE)
   
   

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

2. WAVEFORM 2 
   Fig 3: Identifying Waveform 2

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   AIR FUEL RATIO SENSOR HEATER
   
   

   ECM Terminal Name	CH1: Between HA1A and E04 CH2: Between HA2A and E05
   Tester Range	5 V/DIV., 10 msec./DIV.
   Condition	Idling

   HINT: 

   The wavelength becomes shorter as the engine rpm increases.

3. WAVEFORM 3 
   Fig 4: Identifying Waveform 3

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   HEATED OXYGEN SENSOR
   
   

   ECM Terminal Name	Between OX1B and E2 or OX2B and E2
   Tester Range	0.2 V/DIV., 200 msec./DIV.
   Condition	Maintain engine speed at 2500 rpm for 2 minutes after warming up sensor

   HINT: 

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

4. WAVEFORM 4 
   Fig 5: Identifying Waveform 4

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   INJECTOR FOR PORT INJECTION NO. 1 (TO NO. 8) INJECTION SIGNAL
   
   

   ECM Terminal Name	Between #10 (to #80) and E1
   Tester Range	5 V/DIV., 5 msec./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.
5. WAVEFORM 5 
   Fig 6: Identifying Waveform 5

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   INJECTOR FOR DIRECT INJECTION NO. 1 (TO NO. 8) INJECTION SIGNAL AND INJECTION CONFIRMATION SIGNAL
   
   

   ECM Terminal Name	CH1: Between #1 or #6 and E1 CH2: Between INJ1 and E1
   	CH1: Between #4 or #7 and E1 CH2: Between INJ2 and E1
   	CH1: Between #5 or #8 and E1 CH2: Between INJ3 and E1
   	CH1: Between #2 or #3 and E1 CH2: Between INJ4 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.
6. WAVEFORM 6 
   Fig 7: Identifying Waveform 6

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   KNOCK SENSOR
   
   

   ECM Terminal Name	Between KNK1 and EKNK Between KNK2 and EKN2 Between KNK3 and ENK3 Between KNK4 and ENK4
   Tester Range	0.01 to 10 V/DIV., 0.01 to 10 msec./DIV.
   Condition	Maintain engine speed at 4000 rpm after warming up

   HINT: 

   • The wavelength becomes shorter as the engine rpm increases.
   • The waveforms and amplitudes displayed differ slightly depending on the vehicle.
7. WAVEFORM 7 
   Fig 8: Identifying Waveform 7

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   VVT SENSORS FOR INTAKE SIDE
   
   

   ECM Terminal Name	(a) Between VV1+ and VV1- (b) Between VV2+ and VV2-
   Tester Range	5 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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   VVT SENSORS FOR EXHAUST SIDE
   
   

   ECM Terminal Name	(a) Between EV1+ and EV1- (b) Between EV2+ and EV2-
   Tester Range	5 V/DIV., 20 msec./DIV.
   Condition	Idling

   HINT: 

   The wavelength becomes shorter as the engine rpm increases.

9. WAVEFORM 9 
   Fig 10: Identifying Waveform 9

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   CAMSHAFT POSITION SENSOR
   
   

   ECM Terminal Name	Between G2+ and G2-
   Tester Range	5 V/DIV., 20 msec./DIV.
   Condition	Idling

   HINT: 

   The wavelength becomes shorter as the engine rpm increases.

10. WAVEFORM 10 
    Fig 11: Identifying Waveform 10

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    CRANKSHAFT POSITION SENSOR
    
    

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

    HINT: 

    The wavelength becomes shorter as the engine rpm increases.

11. WAVEFORM 11 
    Fig 12: Identifying Waveform 11

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

    ECM Terminal Name	CH1: Between IGT (1 to 8) and E1 CH2: 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.

12. WAVEFORM 12 
    Fig 13: Identifying Waveform 12

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    PURGE VSV
    
    

    ECM Terminal Name	Between PRG and E1
    Tester Range	10 V/DIV., 20 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.

13. WAVEFORM 13 
    Fig 14: Identifying Waveform 13

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    VEHICLE SPEED SIGNAL
    
    

    ECM Terminal Name	Between SPD and E1
    Tester Range	2 V/DIV., 20 msec./DIV.
    Condition	Engine switch on (IG), rotate driving wheel slowly

    HINT: 

    The wavelength becomes shorter as the vehicle speed increases.

14. WAVEFORM 14 
    Fig 15: Identifying Waveform 14

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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.

15. WAVEFORM 15 
    Fig 16: Identifying Waveform 15

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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.

16. WAVEFORM 16 
    Fig 17: Identifying Waveform 16

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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.

17. WAVEFORM 17 
    Fig 18: Identifying Waveform 17

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    FUEL PUMP FOR HIGH PRESSURE (SPILL CONTROL VALVE) (BANK 1)
    
    

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

18. WAVEFORM 18 
    Fig 19: Identifying Waveform 18

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    FUEL PUMP FOR HIGH PRESSURE (SPILL CONTROL VALVE) (BANK 2)
    
    

    ECM Terminal Name	CH1: Between FPD2 and E1 CH2: Between FPF2 and E1
    Tester Range	2 V/DIV., 5 msec./DIV.
    Condition	Idling

19. WAVEFORM 19 
    Fig 20: Identifying Waveform 19

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    CAN COMMUNICATION SIGNAL
    
    

    ECM Terminal Name	Between CANH and E1
    Tester Range	1 V/DIV., 10 μsec./DIV.
    Condition	Engine switch on (IG)

    HINT: 

    The waveform varies depending on the CAN communication signal.

20. WAVEFORM 20 
    Fig 21: Identifying Waveform 20

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    CAN COMMUNICATION SIGNAL
    
    

    ECM Terminal Name	Between CANL and E1
    Tester Range	1 V/DIV., 10 μsec./DIV.
    Condition	Engine switch on (IG)

    HINT: 

    The waveform varies depending on the CAN communication signal.

21. WAVEFORM 21 
    Fig 22: Identifying Waveform 21

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    CAMSHAFT TIMING CONTROL MOTOR EMD SIGNAL
    
    

    ECM Terminal Name	Between EMD1 and E1 or EMD2 and E1
    Tester Range	2 V/DIV., 100 msec./DIV.
    Condition	Idling

    HINT: 

    The wavelength becomes shorter as the engine rpm increases.

22. WAVEFORM 22 
    Fig 23: Identifying Waveform 22

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    CAMSHAFT TIMING CONTROL MOTOR EMR SIGNAL
    
    

    ECM Terminal Name	Between EMR1 and E1 or EMR2 and E1
    Tester Range	2 V/DIV., 5 msec./DIV.
    Condition	Idling

    HINT: 

    The wavelength becomes shorter as the engine rpm increases.

23. WAVEFORM 23 
    Fig 24: Identifying Waveform 23

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    CAMSHAFT TIMING CONTROL MOTOR EDT SIGNAL
    
    

    ECM Terminal Name	Between EDT1 and E1 or EDT2 and E1
    Tester Range	1 V/DIV., 5 msec./DIV.
    Condition	Idling

    HINT: 

    The wavelength becomes shorter as the engine rpm increases.