Terminals Of ECM

Fig 1: Identifying ECM Connector Terminals Identification

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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):
   
   

   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 ms./DIV
   Condition	Idling

2. WAVEFORM 2 
   Fig 3: Identifying Waveform 2

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   AIR FUEL RATIO SENSOR HEATER:
   
   

   ECM Terminal Name	Between HA1A and E04 or HA2A and E05
   Tester Range	5 V/DIV, 10 ms./DIV
   Condition	Idling

   HINT: 

   The wavelength varies in accordance with the engine operating condition.

3. WAVEFORM 3 
   Fig 4: Identifying Waveform 3

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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 ms./DIV
   Condition	Engine speed maintained at 2500 rpm for 2 minutes after warming up engine

   HINT: 

   In Data List, item O2S B1S2 and 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 DIRECT INJECTION NO. 1 (TO NO. 6) INJECTION SIGNAL:
   
   

   ECM Terminal Name	Between #10 (to #60) 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.
   • When the direct injection injectors are operating, Direct is displayed for Injection Way of the Data List.
5. WAVEFORM 5 
   Fig 6: Identifying Waveform 5

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   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 μs./DIV
   Condition	Idling

   HINT: 

   • The wavelength becomes shorter as the engine speed increases.
   • When the port injection injectors are operating, Port is displayed for Injection Way of the Data List.
6. WAVEFORM 6 
   Fig 7: Identifying Waveform 6 Graph

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   KNOCK SENSOR:
   
   

   ECM Terminal Name	Between KNK1 and EKNK Between KNK2 and EKN2
   Tester Range	1 V/DIV, 1 ms./DIV
   Condition	Engine speed maintained at 4000 rpm after warming up engine

   HINT: 

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

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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 ms./DIV
   Condition	Idling

   HINT: 

   The wavelength becomes shorter as the engine speed increases.

8. WAVEFORM 8 
   Fig 9: Identifying Waveform 8

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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 ms./DIV
   Condition	Idling

   HINT: 

   The wavelength becomes shorter as the engine speed increases.

9. WAVEFORM 9 
   Fig 10: Identifying Waveform 9

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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 6) and E1 CH2: Between IGF1 and E1 or IGF2 and E1
   Tester Range	2 V/DIV, 20 ms./DIV
   Condition	Idling

   HINT: 

   The wavelength becomes shorter as the engine speed increases.

10. WAVEFORM 10 
    Fig 11: Identifying Waveform 10

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    PURGE VSV:
    
    

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

    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 12: Identifying Waveform 11

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    VEHICLE SPEED SIGNAL:
    
    

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

    HINT: 

    The wavelength becomes shorter as the vehicle speed increases.

12. WAVEFORM 12 
    Fig 13: Identifying Waveform 12

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    THROTTLE ACTUATOR POSITIVE TERMINAL:
    
    

    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 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 ms./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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    ENGINE SPEED SIGNAL:
    
    

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

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

15. WAVEFORM 15 
    Fig 16: Waveform 15

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

    ECM Terminal Name	CH1: Between #10 or #40 and E1, CH2: Between INJF and E1 CH1: Between #20 or #50 and E1, CH2: Between IJF2 and E1 CH1: Between #30 or #60 and E1, CH2: Between IJF3 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.
    • When the direct injection injectors are operating, Direct is displayed for Injection Way of the Data List.
16. WAVEFORM 16 
    Fig 17: Identifying Waveform 16

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    FUEL PUMP FOR HIGH PRESSURE (SPILL VALVE):
    
    

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

17. WAVEFORM 17 
    Fig 18: Identifying Waveform 17

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    CAN COMMUNICATION SIGNAL:
    
    

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

    HINT: 

    The waveform varies depending on the CAN communication signal.

18. WAVEFORM 18 
    Fig 19: Identifying Waveform 18

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    CAN COMMUNICATION SIGNAL:
    
    

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

    HINT: 

    The waveform varies depending on the CAN communication signal.