Terminals Of ECM

Fig 1: ECM Connector Terminal 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.

*1: w/ Smart Key System

*2: 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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   1. Camshaft timing oil control valve assembly operation signal

      ECM Terminal Name	Between OC1+ and OC1-, OC2+ and OC2-, OE1+ and OE1-, or OE2+ and OE2-
      Tester Range	5 V/DIV., 1 ms./DIV.
      Condition	Idling

      HINT: 

      The wavelength becomes shorter as the engine speed increases.

2. WAVEFORM 2
   Fig 3: Identifying Waveform 2

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   1. Heated oxygen sensor signal

      ECM Terminal Name	Between OX1B and EX1B, or OX2B and EX2B
      Tester Range	200 mV/DIV., 200 ms./DIV.
      Condition	Engine speed is maintained at 2500 RPM for 2 minutes after warming up engine

      HINT: 

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

3. WAVEFORM 3
   Fig 4: Identifying Waveform 3

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   1. Fuel injector assembly operation signal

      ECM Terminal Name	Between #10 (to #60) and E01
      Tester Range	30 V/DIV., 20 ms./DIV.
      Condition	Idling with warm engine

      HINT: 

      The wavelength becomes shorter as the engine speed increases.

4. WAVEFORM 4
   Fig 5: Identifying Waveform 4

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   1. Knock sensor signal

      ECM Terminal Name	Between KNK1 and EKNK, or 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.
5. WAVEFORM 5
   Fig 6: Identifying Waveform 5

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   1. VVT sensor (for exhaust side) signal (A)
   2. Crankshaft position sensor signal (B)

      ECM Terminal Name	(A) EV1+ and VV1-, or EV2+ and VV1- (B) Between NE+ and NE-
      Tester Range	5 V/DIV., 20 ms./DIV.
      Condition	Idling with warm engine

      HINT: 

      The wavelength becomes shorter as the engine speed increases.

6. WAVEFORM 6
   Fig 7: Identifying Waveform 6

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   1. VVT sensor (for intake side) signal (A)
   2. Crankshaft position sensor signal (B)

      ECM Terminal Name	(A) Between VV1+ and VV1-, VV2+ and VV2- (B) Between NE+ and NE-
      Tester Range	5 V/DIV., 20 ms./DIV.
      Condition	Idling with warm engine

      HINT: 

      The wavelength becomes shorter as the engine speed increases.

7. WAVEFORM 7
   Fig 8: Identifying Waveform 7

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   1. Igniter IGT signal (from ECM to igniter) and igniter IGF signal (from igniter to ECM)

      ECM Terminal Name	(1) Between IGT (1 to 6) and E1 (2) Between IGF1 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.

8. WAVEFORM 8
   Fig 9: Identifying Waveform 8

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   1. Purge VSV for EVAP system operation signal

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

      HINT: 

      If the waveform is not similar to that shown in 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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   1. 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.
      • Depending on the vehicle, the output waveform voltage may rise to 12 V if influenced by optionally installed systems.
10. WAVEFORM 10
    Fig 11: Identifying Waveform 10

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    1. Throttle actuator operation signal (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.

11. WAVEFORM 11
    Fig 12: Identifying Waveform 11

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    1. Throttle actuator operation signal (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.

12. WAVEFORM 12
    Fig 13: Identifying Waveform 12

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    1. Engine speed signal

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

       HINT: 

       The wavelength becomes shorter as the engine speed increases.

13. WAVEFORM 13 (Reference)
    Fig 14: Identifying Waveform 13

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    1. CAN communication signal

       ECM Terminal Name	Between CANH and E1, CAN+ and E1 or CANP and E1
       Tester Range	1 V/DIV., 10 μsec./DIV.
       Condition	Engine stopped and ignition switch ON

       HINT: 

       The waveform varies depending on the CAN communication signal.

14. WAVEFORM 14 (Reference)
    Fig 15: Identifying Waveform 14

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    1. CAN communication signal

       ECM Terminal Name	Between CANL and E1, CAN- and E1 or CANN and E1
       Tester Range	1 V/DIV., 10 μsec./DIV.
       Condition	Engine stopped and ignition switch ON

       HINT: 

       The waveform varies depending on the CAN communication signal.

15. WAVEFORM 15
    Fig 16: Identifying Waveform 15

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    1. Air fuel ratio sensor heater operation signal

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

       HINT: 

       The wavelength becomes shorter as the engine speed increases.

16. WAVEFORM 16
    Fig 17: Identifying Waveform 16

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    1. Crankshaft position sensor signal

       ECM Terminal Name	Between NEO and E1
       Tester Range	5 V/DIV., 2 ms./DIV.
       Condition	Idling with warm engine

       HINT: 

       The wavelength becomes shorter as the engine speed increases.