Terminals Of ECM [12/2021 - ]

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 are 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. WAVEFORM 1 

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   CAN COMMUNICATION SIGNAL (REFERENCE)
   
   

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

   HINT: 

   The waveform varies depending on the CAN communication signal.

2. WAVEFORM 2 

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   CAN COMMUNICATION SIGNAL (REFERENCE)
   
   

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

   HINT: 

   The waveform varies depending on the CAN communication signal.

3. WAVEFORM 3 

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   ENGINE SPEED SIGNAL
   
   

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

   HINT: 

   The wavelength becomes shorter as the engine speed increases.

4. WAVEFORM 4 

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   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.

5. WAVEFORM 5 

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   AIR FUEL RATIO SENSOR (SENSOR 2) HEATER OPERATION SIGNAL
   
   

   ECM Terminal Name	Between HA1B and E1 Between HA2B and E1
   Tester Range	5 V/DIV., 10 ms./DIV.
   Condition	Idling with cold engine

6. WAVEFORM 6 

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   AIR FUEL RATIO SENSOR (SENSOR 1) HEATER OPERATION SIGNAL
   
   

   ECM Terminal Name	Between HA1A and E1 Between HA2A and E1
   Tester Range	5 V/DIV., 10 ms./DIV.
   Condition	Idling with cold engine

7. WAVEFORM 7 

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   CAM TIMING OIL CONTROL SOLENOID ASSEMBLY (FOR EXHAUST CAMSHAFT) OPERATION SIGNAL
   
   

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

8. WAVEFORM 8 

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   CAM TIMING OIL CONTROL SOLENOID ASSEMBLY (FOR INTAKE CAMSHAFT) OPERATION SIGNAL
   
   

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

9. WAVEFORM 9 

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   THROTTLE ACTUATOR OPERATION SIGNAL (POSITIVE TERMINAL)
   
   

   ECM Terminal Name	Between M+ and E1
   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 

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    THROTTLE ACTUATOR OPERATION SIGNAL (NEGATIVE TERMINAL)
    
    

    ECM Terminal Name	Between M- and E1
    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 

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    FUEL PUMP ASSEMBLY (FOR HIGH PRESSURE SIDE) SIGNAL
    
    

    ECM Terminal Name	CH1: Between FP1+ and E1 CH2: Between FP1- and E1
    Tester Range	20 V/DIV., 500 μs./DIV.
    Condition	Idling with warm engine, Data List item "Injection Mode" displaying "Direct"

12. WAVEFORM 12 

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    DIRECT FUEL INJECTOR ASSEMBLY SIGNAL
    
    

    ECM Terminal Name	CH1: Between #1D+ and E1 CH2: Between #1D- and E1
    	CH1: Between #2D+ and E1 CH2: Between #2D- and E1
    	CH1: Between #3D+ and E1 CH2: Between #3D- and E1
    	CH1: Between #4D+ and E1 CH2: Between #4D- and E1
    	CH1: Between #5D+ and E1 CH2: Between #5D- and E1
    	CH1: Between #6D+ and E1 CH2: Between #6D- and E1
    Tester Range	50 V/DIV., 200 μs./DIV.
    Condition	Idling with warm engine, Data List item "Injection Mode" displaying "Direct"

13. WAVEFORM 13 

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    PURGE VSV 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 the illustration, check the waveform again after idling for 10 minutes or more.

14. WAVEFORM 14 

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    PORT FUEL INJECTOR ASSEMBLY SIGNAL
    
    

    ECM Terminal Name	Between #10 (to #60) and E1
    Tester Range	20 V/DIV., 20 ms./DIV.
    Condition	Idling with warm engine (Data List item "Injection Mode" displaying "Port")

    HINT: 

    • The wavelength becomes shorter as the engine speed increases.
    • When the port injection injectors are operating, Port is displayed for Injection Mode of the Data List.
15. WAVEFORM 15 

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    IGNITION COIL ASSEMBLY SIGNAL (IGT SIGNAL)
    
    

    ECM Terminal Name	Between IGT (1 to 6) 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.

16. WAVEFORM 16 

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    MASS AIR FLOW METER SUB-ASSEMBLY SIGNAL
    
    

    ECM Terminal Name	Between VG and E2G Between VG2 and E2G2
    Tester Range	1 V/DIV., 100 μs./DIV.
    Condition	Ignition switch ON

17. WAVEFORM 17 

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    CAMSHAFT POSITION SENSOR (FOR EXHAUST CAMSHAFT) SIGNAL
    
    

    ECM Terminal Name	CH1: Between EV1+ and EV1- CH2: Between EV2+ and EV2-
    Tester Range	5 V/DIV., 20 ms./DIV.
    Condition	Idling with warm engine

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

18. WAVEFORM 18 

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    CAMSHAFT POSITION SENSOR (FOR INTAKE CAMSHAFT) SIGNAL
    
    

    ECM Terminal Name	CH1: Between VV1+ and VV1- CH2: Between VV2+ and VV2-
    Tester Range	5 V/DIV., 20 ms./DIV.
    Condition	Idling with warm engine

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

19. WAVEFORM 19 

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    CRANKSHAFT POSITION SENSOR SIGNAL
    
    

    ECM Terminal Name	Between NE+ and NE-
    Tester Range	2 V/DIV., 20 ms./DIV.
    Condition	Idling with warm engine

    HINT: 

    The wavelength becomes shorter as the engine speed increases.

20. WAVEFORM 20 

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    FAN SPEED SENSOR SIGNAL
    
    

    ECM Terminal Name	Between NCF and ECF
    Tester Range	5 V/DIV., 10 ms./DIV.
    Condition	Fan speed maintained at 3000 rpm

21. WAVEFORM 21 

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    KNOCK CONTROL SENSOR SIGNAL
    
    

    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 the engine

    HINT: 

    • The wavelength becomes shorter as the engine speed increases.
    • The waveforms and amplitudes displayed differ slightly depending on the vehicle.