Terminals Of ECM

Fig 1: Identifying Terminals Of ECM Connector

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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.

1. WAVEFORM 1 

   Camshaft timing oil control valve (OCV) (Exhaust side): 

   WAVEFORM 1 REFERENCE
   
   

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

   Fig 2: Identifying Waveform 1

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2. WAVEFORM 2 

   A/F sensor heater: 

   WAVEFORM 2 REFERENCE
   
   

   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.

   Fig 3: Identifying Waveform 2

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3. WAVEFORM 3 

   Heated oxygen sensor: 

   WAVEFORM 3 REFERENCE
   
   

   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.

   Fig 4: Identifying Waveform 3

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4. WAVEFORM 4 

   Injector for port injection No. 1 (to No. 8) injection signal: 

   WAVEFORM 4 REFERENCE
   
   

   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 or less

   HINT:

   The wavelength becomes shorter as the engine RPM increases.

   Fig 5: Identifying Waveform 4

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5. WAVEFORM 5 

   Injector for direct injection No. 1 (to No. 8) injection signal and Injection confirmation signal: 

   WAVEFORM 5 REFERENCE
   
   

   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.

   Fig 6: Identifying Waveform 5

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6. WAVEFORM 6 

   Knock sensor: 

   WAVEFORM 6 REFERENCE
   
   

   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.
     Fig 7: Identifying Waveform 6

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7. WAVEFORM 7 

   Crankshaft position sensor and VVT sensor for intake side: 

   WAVEFORM 7 REFERENCE
   
   

   ECM Terminal Name	Between NE+ and NE- Between VV1+ and VV1- 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.

   Fig 8: Identifying Waveform 7

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8. WAVEFORM 8 

   Crankshaft position sensor and VVT sensor for exhaust side: 

   WAVEFORM 8 REFERENCE
   
   

   ECM Terminal Name	Between NE+ and NE- Between EV1+ and EV1- 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.

   Fig 9: Identifying Waveform 8

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9. WAVEFORM 9 

   Crankshaft position sensor and camshaft position sensor: 

   WAVEFORM 9 REFERENCE
   
   

   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.

   Fig 10: Identifying Waveform 9

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10. WAVEFORM 10 

    Igniter IGT signal (from ECM to igniter) and Igniter IGF signal (from igniter to ECM): 

    WAVEFORM 10 REFERENCE
    
    

    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.

    Fig 11: Identifying Waveform 10

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11. WAVEFORM 11 

    Purge VSV: 

    WAVEFORM 11 REFERENCE
    
    

    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.

    Fig 12: Identifying Waveform 11

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12. WAVEFORM 12 

    Vehicle speed signal: 

    WAVEFORM 12 REFERENCE
    
    

    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.

    Fig 13: Identifying Waveform 12

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13. WAVEFORM 13 

    Throttle actuator negative terminal: 

    WAVEFORM 13 REFERENCE
    
    

    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.

    Fig 14: Identifying Waveform 13

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14. WAVEFORM 14 

    Throttle actuator positive terminal: 

    WAVEFORM 14 REFERENCE
    
    

    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.

    Fig 15: Identifying Waveform 14

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15. WAVEFORM 15 

    Engine speed signal: 

    WAVEFORM 15 REFERENCE
    
    

    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.

    Fig 16: Identifying Waveform 15

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16. WAVEFORM 16 

    Fuel pump for high pressure (spill control valve) (bank 1): 

    WAVEFORM 16 REFERENCE
    
    

    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

    Fig 17: Identifying Waveform 16

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17. WAVEFORM 17 

    Fuel pump for high pressure (spill control valve) (bank 2): 

    WAVEFORM 17 REFERENCE
    
    

    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

    Fig 18: Identifying Waveform 17

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18. WAVEFORM 18 

    CAN communication signal: 

    WAVEFORM 18 REFERENCE
    
    

    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.

    Fig 19: Identifying Waveform 18

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19. WAVEFORM 19 

    CAN communication signal: 

    WAVEFORM 19 REFERENCE
    
    

    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.

    Fig 20: Identifying Waveform 19

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20. WAVEFORM 20 

    Recharging control signal 

    WAVEFORM 20 REFERENCE
    
    

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

    Fig 21: Identifying Waveform 20

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21. WAVEFORM 21 

    Intake air control valve signal 

    WAVEFORM 21 REFERENCE
    
    

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

    Fig 22: Identifying Waveform 21

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22. WAVEFORM 22 

    Camshaft timing control motor EMD signal: 

    WAVEFORM 22 REFERENCE
    
    

    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.

    Fig 23: Identifying Waveform 22

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23. WAVEFORM 23 

    Camshaft timing control motor EMR signal: 

    WAVEFORM 23 REFERENCE
    
    

    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.

    Fig 24: Identifying Waveform 23

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24. WAVEFORM 24 

    Camshaft timing control motor EDT signal: 

    WAVEFORM 24 REFERENCE
    
    

    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.

    Fig 25: Identifying Waveform 24

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