Terminals Of ECM

Fig 1: Identifying Terminals Of ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

The standard normal voltage between each pair of the ECM (included in the hybrid vehicle control ECU) 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 the 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-
   Tester Range	5 V/DIV., 1 ms./DIV.
   Condition	Idling

   Fig 2: Identifying Waveform 1

   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-
   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: Identifying Waveform 2

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   In Data List, item O2S B1 S2 shows the values input to the ECM from the heated oxygen sensor.

3. WAVEFORM 3 

   Injector No. 1 (to No. 4) injection signal: 

   WAVEFORM REFERENCE
   
   

   ECM Terminal Name	Between #10 (to #40) and E1
   Tester Range	2 V/DIV., 20 ms./DIV.
   Condition	Idling

   Fig 4: Identifying Waveform 3

   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
   Tester Range	0.01 to 10 V/DIV., 0.01 to 10 ms./DIV.
   Condition	Engine speed maintained a 4,000 rpm after warming up engine

   Fig 5: Identifying Waveform 4

   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 Camshaft position sensor: 

   WAVEFORM REFERENCE
   
   

   ECM Terminal Name	Between G2+ and G2- Between NE+ and NE-
   Tester Range	5 V/DIV., 20 ms./DIV.
   Condition	Idling

   Fig 6: Identifying Waveform 5

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   The wavelength becomes shorter as the engine rpm increases.

6. WAVEFORM 6 

   Igniter IGT signal (from ECM to igniter) and Igniter IGF signal (from igniter to ECM): 

   WAVEFORM REFERENCE
   
   

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

   Fig 7: Identifying Waveform 6

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   The wavelength becomes shorter as the engine rpm increases.

7. WAVEFORM 7 

   Purge VSV: 

   WAVEFORM REFERENCE
   
   

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

   Fig 8: Identifying Waveform 7

   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.

8. WAVEFORM 8 

   Vehicle speed signal: 

   WAVEFORM REFERENCE
   
   

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

   Fig 9: Identifying Waveform 8

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   The wavelength becomes shorter as the vehicle speed increases.

9. WAVEFORM 9 

   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 10: Identifying Waveform 9

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   The duty ratio varies depending on the throttle actuator operation.

10. WAVEFORM 10 

    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 11: Identifying Waveform 10

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    The duty ratio varies depending on the throttle actuator operation.

11. WAVEFORM 11 

    CAN communication signal: 

    WAVEFORM REFERENCE
    
    

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

    Fig 12: Identifying Waveform 11

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    The waveform varies depending on the CAN communication signal.

12. WAVEFORM 12 

    CAN communication signal: 

    WAVEFORM REFERENCE
    
    

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

    Fig 13: Identifying Waveform 12

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    The waveform varies depending on the CAN communication signal.