Sfi System Terminals Of Ecm

WAVEFORM 1

1. Camshaft timing Oil Control Valve (OCV) operation signal
   

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

   HINT:

   The wavelength becomes shorter as the engine rpm increases.

WAVEFORM 2

1. Heated oxygen sensor signal
   

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

   HINT:

   In the DATA LIST, item O2S B1S2 shows the ECM values from the heated oxygen sensor.

WAVEFORM 3

1. Fuel injector operation signal
   

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

   HINT:

   The wavelength becomes shorter as the engine rpm increases.

WAVEFORM 4

1. Knock sensor signal
   

   ECM Terminal Name	Between KNK1 and EKNK, or KNK2 and EKN2
   Tester Range	0.01 to 10 V/DIV., 0.01 to 10 ms./DIV.
   Condition	Engine speed is maintained at 4000 rpm after engine is warmed up

   HINT:

   1. The wavelength becomes shorter as the engine rpm increases.
      
   2. The waveforms and amplitudes displayed differ slightly depending on the vehicle.
      

WAVEFORM 5

1. Variable Valve Timing (VVT) sensor signal (a)
   

2. Crankshaft position sensor signal (b)
   

   ECM Terminal Name	(a) Between VV1+ and VV1- , VV2+ and VV2-, EV1+ and EV1-, or EV2+ and EV2- (b) Between NE+ and NE-
   Tester Range	5 V/DIV., 20 ms./DIV.
   Condition	Idling

   HINT:

   The wavelength becomes shorter as the engine rpm increases.

WAVEFORM 6

1. Igniter IGT signal (from ECM to igniter) (a)
   

2. Igniter IGF signal (from igniter to ECM) (b)
   

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

   HINT:

   The wavelength becomes shorter as the engine rpm increases.

WAVEFORM 7

1. Purge VSV for EVAP system operation signal
   

   ECM Terminal Name	Between PRG and E1
   Tester Range	10 V/DIV., 50 ms./DIV.
   Condition	Idling

   HINT:

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

WAVEFORM 8

1. Vehicle speed signal
   

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

   HINT:

   1. The wavelength becomes shorter as the vehicle speed increases.
      
   2. Depending on the vehicle, the output waveform voltage may rise to 12 V if influenced by optionally installed systems.
      

WAVEFORM 9

1. Throttle drive motor operation signal (positive terminal)
   

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

   HINT:

   The duty ratio varies depending on the throttle actuator operation.

WAVEFORM 10

1. Throttle drive motor operation signal (negative terminal)
   

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

   HINT:

   The duty ratio varies depending on the throttle actuator operation.

WAVEFORM 11

1. Engine speed signal
   

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

   HINT:

   The wavelength becomes shorter as the engine rpm increases.

WAVEFORM 12

1. CAN communication signal
   

   ECM Terminal Name	Between CANH and E1
   Tester Range	1 V/DIV., 10 μsec./DIV.
   Condition	Engine stops and ignition switch on (IG)

   HINT:

   The waveform varies depending on the CAN communication signal.

WAVEFORM 13

1. CAN communication signal
   

   ECM Terminal Name	Between CANL and E1
   Tester Range	1 V/DIV., 10 μsec./DIV.
   Condition	Engine stops and ignition switch on (IG)

   HINT:

   The waveform varies depending on the CAN communication signal.