Terminals Of ECM [08/2013 - 08/2015]

Fig 1: Terminals Of ECM Connector End Views

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT: 

The standard voltage, resistance and waveform between each pair of the ECM terminals is shown in the table below. The appropriate conditions for checking each pair of the terminals is also indicated. The result of checks should be compared with the standard voltage, resistance and waveform for each pair of the terminals as displayed in the Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations.

• *1: The ECM terminal voltage is constant regardless of the output voltage from the sensor.

  *2: w/ smart key system.

  *3: for A/T and CVT models.

  *4: for M/T models.

1. WAVEFORM 1 

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   CAN COMMUNICATION SIGNAL (REFERENCE)
   
   

   ECM Terminal Name	Between CANH and E1
   Tester Range	1 V/DIV., 10 μs./DIV.
   Condition	Ignition switch ON

   HINT: 

   The waveform varies depending on the CAN communication signal.

2. WAVEFORM 2 

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   CAN COMMUNICATION SIGNAL (REFERENCE)
   
   

   ECM Terminal Name	Between CANL and E1
   Tester Range	1 V/DIV., 10 μs./DIV.
   Condition	Ignition switch ON

   HINT: 

   The waveform varies depending on the CAN communication signal.

3. WAVEFORM 3 

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   ENGINE SPEED SIGNAL
   
   

   ECM Terminal Name	Between NEO and E1
   Tester Range	1 V/DIV., 2 ms./DIV.
   Condition	Idling with warm engine

4. WAVEFORM 4 

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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.

5. WAVEFORM 5 

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   VEHICLE SPEED SIGNAL
   
   

   ECM Terminal Name	Between SPD and E1
   Tester Range	5 V/DIV., 20 ms./DIV.
   Condition	Driving at 20 km/h (12 mph)

   HINT: 

   The wavelength becomes shorter as the vehicle speed increases.

6. WAVEFORM 6 

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   COOLING FAN CONTROL SIGNAL
   
   

   ECM Terminal Name	Between RFC and E1
   Tester Range	1 V/DIV., 2 ms./DIV.
   Condition	Ignition switch ON, A/C switch on (max cool)

   HINT: 

   The duty ratio varies depending on the engine coolant temperature.

7. WAVEFORM 7 

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   NO. 1 (TO NO. 4) FUEL INJECTOR ASSEMBLY SIGNAL
   
   

   ECM Terminal Name	Between #10 (to #40) and E01
   Tester Range	20 V/DIV., 20 ms./DIV.
   Condition	Idling

   HINT: 

   The wavelength becomes shorter as the engine speed increases.

8. WAVEFORM 8 

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   AIR FUEL RATIO SENSOR HEATER OPERATION SIGNAL
   
   

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

9. WAVEFORM 9 

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   THROTTLE ACTUATOR NEGATIVE TERMINAL SIGNAL
   
   

   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.

10. WAVEFORM 10 

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    IGNITION COIL ASSEMBLY SIGNAL (IGT AND IGF SIGNAL)
    
    

    ECM Terminal Name	CH1: Between IGT (1 to 4) and E1 CH2: Between IGF1 and E1
    Tester Range	2 V/DIV., 20 ms./DIV.
    Condition	Idling

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

11. WAVEFORM 11 

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    THROTTLE ACTUATOR POSITIVE TERMINAL SIGNAL
    
    

    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 

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    CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST CAMSHAFT) SIGNAL
    
    

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

13. WAVEFORM 13 

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    CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT) SIGNAL
    
    

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

14. WAVEFORM 14 

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    PURGE VSV OPERATION SIGNAL
    
    

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

    HINT: 

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

15. WAVEFORM 15 

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    CRANKSHAFT POSITION SENSOR SIGNAL
    
    

    ECM Terminal Name	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.

16. WAVEFORM 16 

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    CAMSHAFT POSITION SENSOR SIGNAL
    
    

    ECM Terminal Name	CH1: Between VV1+ and VV1- CH2: Between EV1+ and EV1-
    Tester Range	5 V/DIV., 20 ms./DIV.
    Condition	Idling with warm engine

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

17. WAVEFORM 17 

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    HEATED OXYGEN SENSOR SIGNAL
    
    

    ECM Terminal Name	Between OX1B and EX1B
    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 the Data List, the items O2S B1S2 show the values input to the ECM from the heated oxygen sensor.

18. WAVEFORM 18 

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    KNOCK CONTROL SENSOR SIGNAL
    
    

    ECM Terminal Name	Between KNK1 and EKNK
    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.