Terminals Of ECM

Fig 1: Identifying ECM Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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. WAVEFORM 1 

   Camshaft timing oil control valve (OCV): 

   WAVEFORM REFERENCE
   
   

   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

   Fig 2: Waveform 1 Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   The wavelength becomes shorter as the engine rpm increases.

2. WAVEFORM 2 

   Heated oxygen sensor: 

   WAVEFORM REFERENCE
   
   

   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 2,500 rpm for 2 minutes after warming up engine

   Fig 3: Waveform 2 Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   In DATA LIST, item O2S B1 S2 shows the ECM input values from the heated oxygen sensor.

3. WAVEFORM 3 

   Injector for direct injection No. 1 (to No. 6) injection signal: 

   WAVEFORM REFERENCE
   
   

   ECM Terminal Name	Between #10 (to #60) and E1
   Tester Range	2 V/DIV, 20 ms./DIV
   Condition	Idling

   Fig 4: Waveform 3 Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   The wavelength becomes shorter as the engine rpm increases.

4. WAVEFORM 4 

   Knock sensor: 

   WAVEFORM REFERENCE
   
   

   ECM Terminal Name	Between KNK1 and EKNK Between KNK2 and EKN2
   Tester Range	0.01 to 10 V/DIV, 0.01 to 10 ms./DIV
   Condition	Engine speed maintained at 4,000 rpm after warming up engine

   Fig 5: Waveform 4 Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   • The wavelength becomes shorter as the engine rpm increases.
   • The waveforms and amplitudes displayed differ slightly depending on the vehicle.
5. WAVEFORM 5 

   Crankshaft position sensor and VVT sensor for intake camshaft: 

   WAVEFORM REFERENCE
   
   

   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

   Fig 6: Waveform 5 Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   The wavelength becomes shorter as the engine rpm increases.

6. WAVEFORM 6 

   Crankshaft position sensor and VVT sensor for exhaust camshaft: 

   WAVEFORM REFERENCE
   
   

   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

   Fig 7: Waveform 6 Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   The wavelength becomes shorter as the engine rpm increases.

7. WAVEFORM 7 

   Igniter IGT signal (from ECM to igniter) and Igniter 

   IGF signal (from igniter to ECM): 

   WAVEFORM REFERENCE
   
   

   ECM Terminal Name	Between IGT (1 to 6) and E1 Between IGF1 and E1 or IGF2 and E1
   Tester Range	2 V/DIV, 20 ms./DIV
   Condition	Idling

   Fig 8: Waveform 7 Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   The wavelength becomes shorter as the engine rpm increases.

8. WAVEFORM 8 

   Purge VSV: 

   WAVEFORM REFERENCE
   
   

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

   Fig 9: Waveform 8 Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

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

9. WAVEFORM 9 

   Vehicle speed signal: 

   WAVEFORM REFERENCE
   
   

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

   Fig 10: Waveform 9 Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   The wavelength becomes shorter as the vehicle speed increases.

10. WAVEFORM 10 

    Throttle actuator positive terminal: 

    WAVEFORM REFERENCE
    
    

    ECM Terminal Name	Between M+ and ME01
    Tester Range	5 V/DIV, 1 ms./DIV
    Condition	Idling with warm engine

    Fig 11: Waveform 10 Graph

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    The duty ratio varies depending on the throttle actuator operation.

11. WAVEFORM 11 

    Throttle actuator negative terminal: 

    WAVEFORM REFERENCE
    
    

    ECM Terminal Name	Between M- and ME01
    Tester Range	5 V/DIV, 1 ms./DIV
    Condition	Idling with warm engine

    Fig 12: Waveform 11 Graph

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    The duty ratio varies depending on the throttle actuator operation.

12. WAVEFORM 12 

    Engine speed signal: 

    WAVEFORM REFERENCE
    
    

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

    Fig 13: Waveform 12 Graph

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    The wavelength becomes shorter as the engine rpm increases.

13. WAVEFORM 13 

    Injector for direct injection No. 1 (to No. 6) injection signal and Injection confirmation signal: 

    WAVEFORM REFERENCE
    
    

    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

    Fig 14: Waveform 13 Graph

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    The wavelength becomes shorter as the engine rpm increases.

14. WAVEFORM 14 

    Fuel pump for high pressure (Spill valve): 

    WAVEFORM REFERENCE
    
    

    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

    Fig 15: Waveform 14 Graph

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
15. WAVEFORM 15 

    CAN communication signal: 

    WAVEFORM REFERENCE
    
    

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

    Fig 16: Waveform 15 Graph

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    The waveform varies depending on the CAN communication signal.

16. WAVEFORM 16 

    CAN communication signal: 

    WAVEFORM REFERENCE
    
    

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

    Fig 17: Waveform 16 Graph

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    The waveform varies depending on the CAN communication signal.

17. WAVEFORM 17 

    Injector for direct injection No. 1 (to No. 6) injection signal: 

    WAVEFORM REFERENCE
    
    

    ECM Terminal Name	Between #1P (to #6P) and E1
    Tester Range	2 V/DIV, 20 ms./DIV
    Condition	Idling

    Fig 18: Waveform 17 Graph

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    The wavelength becomes shorter as the engine rpm increases.