Terminals Of ECM

Fig 1: Identifying 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 (OCV) (EXHAUST SIDE):
   
   

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

2. WAVEFORM 2 
   Fig 3: Identifying Waveform 2

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   A/F SENSOR HEATER:
   
   

   ECM Terminal Name	CH1: Between HA1A and E1 CH2: Between HA2A and E1
   Tester Range	5 V/DIV., 10 msec./DIV.
   Condition	Idling with warm engine

   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	Engine speed maintained at 2500 rpm for 2 minutes after warming up

   HINT: 

   In Data List, item O2S B1 S2 or O2S B2 S2 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 and engine coolant temperature 60°C (140°F) or less

   HINT: 

   The wavelength becomes shorter as the engine rpm increases.

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 INJF1 and E1
   	CH1: Between #4 or #7 and E1 CH2: Between INJF2 and E1
   	CH1: Between #5 or #8 and E1 CH2: Between INJF3 and E1
   	CH1: Between #2 or #3 and E1 CH2: Between INJF4 and E1
   Tester Range	2 V/DIV., 20 msec./DIV.
   Condition	Idling with warm engine

   HINT: 

   The wavelength becomes shorter as the engine rpm increases.

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	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.
7. WAVEFORM 7 
   Fig 8: Identifying Waveform 7

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   CRANKSHAFT POSITION SENSOR AND VVT SENSOR FOR INTAKE SIDE:
   
   

   ECM Terminal Name	(a) Between NE+ and NE- (b) Between VV1+ and VV1- (c) Between VV2+ and VV2-
   Tester Range	5 V/DIV., 20 msec./DIV.
   Condition	Idling with warm engine

   HINT: 

   The wavelength becomes shorter as the engine rpm increases.

8. WAVEFORM 8 
   Fig 9: Identifying Waveform 8

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   CRANKSHAFT POSITION SENSOR AND VVT SENSOR FOR EXHAUST SIDE:
   
   

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

   HINT: 

   The wavelength becomes shorter as the engine rpm increases.

9. WAVEFORM 9 
   Fig 10: Identifying Waveform 9

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   CRANKSHAFT POSITION SENSOR AND CAMSHAFT POSITION SENSOR:
   
   

   ECM Terminal Name	CH1: Between NE+ and NE- CH2: Between G2+ and G2-
   Tester Range	5 V/DIV., 20 msec./DIV.
   Condition	Idling with warm engine

   HINT: 

   The wavelength becomes shorter as the engine rpm increases.

10. WAVEFORM 10 
    Fig 11: Identifying Waveform 10

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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 with warm engine

    HINT: 

    The wavelength becomes shorter as the engine rpm increases.

11. WAVEFORM 11 
    Fig 12: Identifying Waveform 11

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    PURGE VSV:
    
    

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

    HINT: 

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

12. WAVEFORM 12 
    Fig 13: Identifying Waveform 12

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    VEHICLE SPEED SIGNAL:
    
    

    ECM Terminal Name	Between SPD and E1
    Tester Range	2 V/DIV., 20 msec./DIV.
    Condition	Driving at 12 mph (20 km/h)

    HINT: 

    The wavelength becomes shorter as the vehicle speed increases.

13. WAVEFORM 13 
    Fig 14: Identifying Waveform 13

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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.

14. WAVEFORM 14 
    Fig 15: Identifying Waveform 14

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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.

15. WAVEFORM 15 
    Fig 16: Identifying Waveform 15

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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.

16. WAVEFORM 16 
    Fig 17: Identifying Waveform 16

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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 with warm engine

17. WAVEFORM 17 
    Fig 18: Identifying Waveform 17

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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	1200 rpm with warm engine

18. WAVEFORM 18 
    Fig 19: Identifying Waveform 18

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    CAN COMMUNICATION SIGNAL:
    
    

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

    HINT: 

    The waveform varies depending on the CAN communication signal.

19. WAVEFORM 19 
    Fig 20: Identifying Waveform 19

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    CAN COMMUNICATION SIGNAL:
    
    

    ECM Terminal Name	Between CANL and E1
    Tester Range	1 V/DIV., 10 μsec./DIV.
    Condition	Stop engine and 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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    RECHARGING CONTROL SIGNAL:
    
    

    ECM Terminal Name	Between RLO and E1
    Tester Range	2 V/DIV., 50 msec./DIV.
    Condition	Idling

21. WAVEFORM 21 
    Fig 22: Identifying Waveform 21

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    INTAKE AIR CONTROL VALVE SIGNAL:
    
    

    ECM Terminal Name	Between ASM+ and ASM-
    Tester Range	5 V/DIV., 5 msec./DIV.
    Condition	Warm engine and 3000 rpm

22. WAVEFORM 22 
    Fig 23: Identifying Waveform 22

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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 with warm engine

    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 EMR SIGNAL:
    
    

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

    HINT: 

    The wavelength becomes shorter as the engine rpm increases.

24. WAVEFORM 24 
    Fig 25: Identifying Waveform 24

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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 with warm engine

    HINT: 

    The wavelength becomes shorter as the engine rpm increases.