Waveform

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

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

ECM Terminal Names

(b) Between IGF1 and E1

Tester Ranges 2

2 V/DIV, 20 msec./DIV

Conditions

The wavelength becomes shorter as the engine rpm increases.

7. WAVEFORM 7

Purge VSV_

7. WAVEFORM 7

Purge VSV_

ECM Terminal Names

Between PRG and E01

Tester Ranges

10 V/DIV, 50 msec./DIV

Conditions

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

ECM Terminal Names Between SPD and E1 Tester Ranges 2 V/DIV, 20 msec./DIV

Conditions Driving at 12 mph (20 km/h)

HINT:

The wavelength becomes shorter as the vehicle speed increases.

2 V/DIV. Ground ^

A093224E02

5 V/DIV. Ground

-

-

i i

i i

-

1 1

A093274E02

9. WAVEFORM 9

Throttle actuator positive terminal

ECM Terminal Names

Between M+ and ME01

Tester Ranges

5 V/DIV, 1 msec./DIV

Conditions

Idling with warm engine

HINT:

The duty ratio varies depending on the throttle actuator operation.

A093275E02

10. WAVEFORM 10

Throttle actuator negative terminal

ECM Terminal Names

Between M- and ME01

Tester Ranges

5 V/DIV, 1 msec./DIV

Conditions

Idling with warm engine

HINT:

The duty ratio varies depending on the throttle actuator operation.

A093275E02

5 V/DIV. Ground

A093225E03

5 V/DIV. Ground

i

1

1

1

1

:

500 msec./DIV. A093227E03

11. WAVEFORM 11

Engine speed signal

ECM Terminal Names

Between TACH and E1

Tester Ranges

5 V/DIV, 10 msec./DIV

Conditions

The wavelength becomes shorter as the engine rpm increases.

12. WAVEFORM 12

Airbag sensor assembly

ECM Terminal Names

Between F/PS and E1

Tester Ranges

5 V/DIV, 500 msec./DIV

Conditions

Idling with warm engine

Jtnrn

mm

'GND

'GND

A086155E06

CHECK

nm.n., n

T n . n; r-ir

IffotJc:

10 il sec./DIV.

13. WAVEFORM 13

CAN communical

tion signal

ECM Terminal Names

Between CANH and E1

Tester Ranges

1 V/DIV, 10^sec./DIV

Conditions

Stop engine and ignition switch ON

HINT:

The wavelength varies depending on the CAN communication signal.

14. WAVEFORM 14

CAN communical

tion signal

ECM Terminal Names

Between CANL and E1

Tester Ranges

1 V/DIV, 10^sec./DIV

Conditions

Stop engine and ignition switch ON

HINT:

The wavelength varies depending on the CAN communication signal.

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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