SFI SYSTEM TERMINALS OF ECM

Measure the voltage according to the value(s) in the table below.

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

1. WAVEFORM 1

   

   *a	5 V/DIV.
   *b	Ground
   *c	1 msec./DIV.

   Camshaft Timing Oil Control Valve

   ECM Terminal Name	Between OC1+ and OC1- Between OC2+ and OC2- Between OE1+ and OE1- Between OE2+ and OE2-
   Tester Range	5 V/DIV., 1 msec./DIV.
   Condition	Idling

2. WAVEFORM 2

   

   *1	0.2 V/DIV.
   *2	Ground
   *3	200 msec./DIV.

   Heated Oxygen Sensor

   ECM Terminal Name	Between OX1B and EX1B or OX2B and EX2B
   Tester Range	0.2 V/DIV., 200 msec./DIV.
   Condition	Engine speed maintained at 2500 rpm for 2 minutes after warming up engine

   Tech Tips

   In the Data List, items O2S B1S2 and O2S B2S2 show the ECM input values from the heated oxygen sensors.

3. WAVEFORM 3

   

   *1	30 V/DIV.
   *2	Ground
   *3	20 msec./DIV.

   Fuel Injector

   ECM Terminal Name	Between #10 (to #60) and E01
   Tester Range	30 V/DIV., 20 msec./DIV.
   Condition	Idling

   Tech Tips

   The wavelength becomes shorter as the engine speed increases.

4. WAVEFORM 4

   

   *a	KNK1 Signal Waveform
   *b	1 V/DIV.
   *c	Ground
   *d	1 msec./DIV.

   Knock Sensor

   ECM Terminal Name	Between KNK1 and EKNK or KNK2 and EKN2
   Tester Range	1 V/DIV., 0.01 to 1 msec./DIV.
   Condition	Engine speed maintained at 4000 rpm after warming up engine

   Tech Tips

   
   

   • The wavelength becomes shorter as the engine speed increases.

   • The waveforms and amplitudes displayed differ slightly depending on the vehicle condition.

5. WAVEFORM 5

   

   
   

   1. Crankshaft position sensor

   2. VVT sensor

      ECM Terminal Name	(a) Between NE+ and NE- (b) Between VV1+ and VV1- or VV2+ and VV2-
      Tester Range	2 V/DIV., 20 msec./DIV.
      Condition	Idling

      Tech Tips

      The wavelength becomes shorter as the engine speed increases.

6. WAVEFORM 6

   

   
   

   1. Igniter IGT signal (from ECM to igniter)

   2. Igniter IGF signal (from igniter to ECM)

      ECM Terminal Name	(a) Between IGT (1 to 6) and E1 (b) Between IGF1 and E1
      Tester Ranges	2 V/DIV., 20 msec./DIV.
      Condition	Idling

      Tech Tips

      The wavelength becomes shorter as the engine speed increases.

7. WAVEFORM 7

   

   *1	10 V/DIV.
   *2	20 msec./DIV.

   Purge VSV

   ECM Terminal Name	Between PRG and E1
   Tester Range	10 V/DIV., 20 msec./DIV.
   Condition	Idling

   Tech Tips

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

8. WAVEFORM 8

   

   *a	2 V/DIV.
   *b	Ground
   *c	20 msec./DIV.

   Vehicle Speed Signal

   ECM Terminal Name	Between SPD and E1
   Tester Range	2 V/DIV., 20 msec./DIV.
   Condition	Ignition switch ON, driving wheels rotated slowly

   Tech Tips

   The wavelength becomes shorter as the vehicle speed increases.

9. WAVEFORM 9

   

   *a	5 V/DIV.
   *b	1 msec./DIV.

   Positive Terminal of Throttle Actuator

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

   Tech Tips

   The duty ratio varies depending on the throttle actuator operation.

10. WAVEFORM 10

    

    *a	5 V/DIV.
    *b	1 msec./DIV.

    Negative Terminal of Throttle Actuator

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

    Tech Tips

    The duty ratio varies depending on the throttle actuator operation.

11. WAVEFORM 11

    

    *a	5 V/DIV.
    *b	Ground
    *c	10 msec./DIV.

    Engine Speed Signal

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

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

12. WAVEFORM 12

    

    *a	1 V/DIV.
    *b	10 μsec./DIV.

    CAN Communication Signal (Reference)

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

    Tech Tips

    The waveform varies depending on the CAN communication signal.

13. WAVEFORM 13

    

    *a	1 V/DIV.
    *b	10 μsec./DIV.

    CAN Communication Signal (Reference)

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

    Tech Tips

    The waveform varies depending on the CAN communication signal.

14. WAVEFORM 14

    

    *a	5 V/DIV.
    *b	50 msec./DIV.

    Terminal AID of Air Injection Control Driver

    ECM Terminal Name	Between AIDI and E1
    Tester Range	5 V/DIV., 50 msec./DIV.
    Condition	Performing Active Test using GTS (Secondary Air Injection Check)

    Tech Tips

    The wavelength changes when the air injection control driver detects malfunctions in the secondary air injection system Click here.

15. WAVEFORM 15

    

    Crankshaft Position Sensor and VVT Sensor

    ECM Terminal Name	Between NE+ and NE- Between EV1+ and EV1-*1 VV1-*2 Between EV2+ and EV2-*1 VV2-*2
    Tester Range	5 V/DIV., 20 msec./DIV.
    Condition	Idling

    *1: for Manual Transmission Models

    *2: for Automatic Transmission Models

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

16. WAVEFORM 16

    

    *a	5 V/DIV.
    *b	10 msec./DIV.

    Air Fuel Ratio Sensor Heater

    ECM Terminal Name	Between HA1A and E04 Between HA2A and E05
    Tester Range	5 V/DIV., 10 msec./DIV.
    Condition	Idling with warm engine

    Tech Tips

    The wavelength varies in accordance with the engine operating conditions.

17. WAVEFORM 17

    

    *a	1 V/DIV.
    *b	2 ms./DIV.

    Engine speed signal

    ECM Terminal Name	Between NEO and E1
    Tester Range	1 V/DIV., 2 msec./DIV.
    Condition	Idle after engine warmed up

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.