Terminals Of ECM

Fig 1: ECM Connector Terminal Identification

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HINT: 

The standard voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard 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 shown on the Techstream.

1. WAVEFORM 1 
   Fig 2: Identifying Waveform 1

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   CAMSHAFT TIMING OIL CONTROL VALVE SIGNAL
   
   

   Terminal No. (Symbol)	Tool Setting	Condition
   B45-36 (OC1+) - B45-59 (OC1-)	5 V/DIV, 1 ms/DIV	Idling
   B45-35 (OE1+) - B45-58 (OE1-)	5 V/DIV, 1 ms/DIV	Idling

2. WAVEFORM 2 
   Fig 3: Identifying Waveform 2

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   AIR FUEL RATIO SENSOR (BANK 1 SENSOR 1) HEATER SIGNAL
   
   

   Terminal No. (Symbol)	Tool Setting	Condition
   B45-18 (HA1A) - B45-46 (E04)	5 V/DIV, 10 ms/DIV	Idling with warm engine

   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 (BANK 1 SENSOR 2) SIGNAL
   
   

   Terminal No. (Symbol)	Tool Setting	Condition
   B45-125 (OX1B) - B45-102 (EX1B)	200 mV/DIV, 200 ms/DIV	Engine speed maintained at 2500 RPM for 2 minutes after warming up engine

   HINT: 

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

4. WAVEFORM 4 
   Fig 5: Identifying Waveform 4

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   INJECTOR NO. 1 (TO NO. 4) INJECTION SIGNAL
   
   

   Terminal No. (Symbol)	Tool Setting	Condition
   B45-85 (#10) - B45-109 (E01)	20 V/DIV, 20 ms/DIV	Idling
   B45-84 (#20) - B45-109 (E01)	20 V/DIV, 20 ms/DIV	Idling
   B45-83 (#30) - B45-109 (E01)	20 V/DIV, 20 ms/DIV	Idling
   B45-82 (#40) - B45-109 (E01)	20 V/DIV, 20 ms/DIV	Idling

   HINT: 

   The wavelength becomes shorter as the engine speed increases.

5. WAVEFORM 5 
   Fig 6: Identifying Waveform 5

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   KNOCK SENSOR SIGNAL
   
   

   Terminal No. (Symbol)	Tool Setting	Condition
   B45-87 (KNK1) - B45-110 (EKNK)	1 V/DIV, 1 ms/DIV	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.
6. WAVEFORM 6 
   Fig 7: Identifying Waveform 6

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   CRANKSHAFT POSITION SENSOR AND CAMSHAFT POSITION SENSOR SIGNAL
   
   

   Terminal No. (Symbol)	Tool Setting	Condition
   B45-74 (NE+) - B45-120 (NE-)	5 V/DIV, 20 ms/DIV	Idling
   B45-76 (G2+) - B45-122 (G2-)	5 V/DIV, 20 ms/DIV	Idling
   B45-75 (EV1+) - B45-121 (EV1-)	5 V/DIV, 20 ms/DIV	Idling

   HINT: 

   The wavelength becomes shorter as the engine speed increases.

7. WAVEFORM 7 
   Fig 8: Identifying Waveform 7

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   IGNITION COIL IGT SIGNAL (FROM ECM TO IGNITION COIL) AND IGNITION COIL IGF SIGNAL (FROM IGNITION COIL TO ECM)
   
   

   Terminal No. (Symbol)	Tool Setting	Condition
   B45-108 (IGT1) - B45-104 (E1)	2 V/DIV, 20 ms/DIV	Idling
   B45-107 (IGT2) - B45-104 (E1)	2 V/DIV, 20 ms/DIV	Idling
   B45-106 (IGT3) - B45-104 (E1)	2 V/DIV, 20 ms/DIV	Idling
   B45-105 (IGT4) - B45-104 (E1)	2 V/DIV, 20 ms/DIV	Idling
   B45-23 (IGF1) - B45-104 (E1)	2 V/DIV, 20 ms/DIV	Idling

   HINT: 

   The wavelength becomes shorter as the engine speed increases.

8. WAVEFORM 8 
   Fig 9: Identifying Waveform 8

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   PURGE VSV SIGNAL
   
   

   Terminal No. (Symbol)	Tool Setting	Condition
   B45-28 (PRG) - B45-104 (E1)	10 V/DIV, 20 ms/DIV	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.

9. WAVEFORM 9 
   Fig 10: Identifying Waveform 9

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   VEHICLE SPEED SIGNAL
   
   

   Terminal No. (Symbol)	Tool Setting	Condition
   A55-15 (SPD) - B45-104 (E1)	2 V/DIV, 20 ms/DIV	Vehicle driven at 20 km/h (12 mph)

   HINT: 

   The wavelength becomes shorter as the vehicle speed increases.

10. WAVEFORM 10 
    Fig 11: Identifying Waveform 10

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    THROTTLE ACTUATOR POSITIVE TERMINAL SIGNAL
    
    

    Terminal No. (Symbol)	Tool Setting	Condition
    B45-21 (M+) - B45-19 (ME01)	5 V/DIV, 1 ms/DIV	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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    THROTTLE ACTUATOR NEGATIVE TERMINAL SIGNAL
    
    

    Terminal No. (Symbol)	Tool Setting	Condition
    B45-20 (M-) - B45-19 (ME01)	5 V/DIV, 1 ms/DIV	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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    ENGINE SPEED SIGNAL
    
    

    Terminal No. (Symbol)	Tool Setting	Condition
    A55-26 (TACH) - B45-104 (E1)	5 V/DIV, 10 ms/DIV	Idling

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

13. WAVEFORM 13 
    Fig 14: Identifying Waveform 13

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    CAN COMMUNICATION SIGNAL (REFERENCE)
    
    

    Terminal No. (Symbol)	Tool Setting	Condition
    A55-13 (CANH) - B45-104 (E1)	1 V/DIV, 10 μs/DIV	Ignition switch ON

    HINT: 

    The waveform varies depending on the CAN communication signal.

14. WAVEFORM 14 
    Fig 15: Identifying Waveform 14

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    CAN COMMUNICATION SIGNAL (REFERENCE)
    
    

    Terminal No. (Symbol)	Tool Setting	Condition
    A55-5 (CANL) - B45-104 (E1)	1 V/DIV, 10 μs/DIV	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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    DC MOTOR FOR TUMBLE CONTROL VALVE POSITIVE TERMINAL SIGNAL
    
    

    Terminal No. (Symbol)	Tool Setting	Condition
    B45-4 (IA1+) - B45-109 (E01)	5 V/DIV, 1 ms/DIV	Idling with cold engine

16. WAVEFORM 16 
    Fig 17: Identifying Waveform 16

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    DC MOTOR FOR TUMBLE CONTROL VALVE NEGATIVE TERMINAL SIGNAL
    
    

    Terminal No. (Symbol)	Tool Setting	Condition
    B45-3 (IA1-) - B45-109 (E01)	5 V/DIV, 1 ms/DIV	Idling with cold engine

17. WAVEFORM 17 
    Fig 18: Identifying Waveform 17

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    CAN COMMUNICATION SIGNAL (REFERENCE)
    
    

    Terminal No. (Symbol)	Tool Setting	Condition
    B45-24 (CAN+) - B45-104 (E1)	1 V/DIV, 10 μs/DIV	Ignition switch ON

    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 (REFERENCE)
    
    

    Terminal No. (Symbol)	Tool Setting	Condition
    B45-1 (CAN-) - B45-104 (E1)	1 V/DIV, 10 μs/DIV	Ignition switch ON

    HINT: 

    The waveform varies depending on the CAN communication signal.

19. WAVEFORM 19 
    Fig 20: Identifying Waveform 19

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    COOLING FAN CONTROL SIGNAL
    
    

    Terminal No. (Symbol)	Tool Setting	Condition
    A55-33 (RFC) - B45-104 (E1)	1 V/DIV, 20 ms/DIV	Ignition switch ON, A/C switch on (max cool), engine coolant temperature less than 70°C (158°F)

    HINT: 

    The wavelength becomes shorter as the engine coolant temperature increases.