S13S13

TROUBLE DIAGNOSES — Electrical Components Inspection (Cont'd)

EF & EC-124prose procedure
Continued from EF & EC-123

Electrical Components Inspection (Cont'd)

CRANK ANGLE SENSOR

  1. 1
    Remove crank angle sensor from engine.
    Crank angle sensor with terminals a, b, c, d labeled and voltmeter connected between terminal a and ground, showing connector and shaft rotation
    SEF430H
  2. 2
    Check voltage between terminal (a) and ground, and terminal (b) and ground while rotating the crank angle sensor shaft as shown. At this time make sure that injectors operating sound can be heard.
    Crank angle sensor with terminals a, b, c, d labeled and voltmeter connected between terminal a and ground, showing connector and shaft rotation
    SEF430H
VoltageWhile rotating crank angle sensor shaft
0V and approximately 5V appear alternatelyV

AIR FLOW METER

  1. 1
    Remove air flow meter from vehicle and visually check hot wire air passage for dust.
    Air flow meter with terminals a, b, c, d labeled; battery voltage supplied between terminals b and c; voltmeter connected between terminal d and ground
    SEF431H
  2. 2
    Supply battery voltage between terminals (b) and (c).
    Air flow meter with terminals a, b, c, d labeled; battery voltage supplied between terminals b and c; voltmeter connected between terminal d and ground
    SEF431H
  3. 3
    Check voltage between terminal (d) and ground while blowing air flow meter as shown.
    Air flow meter with terminals a, b, c, d labeled; battery voltage supplied between terminals b and c; voltmeter connected between terminal d and ground
    SEF431H
Voltage — When blowingWhen blowing
Approximately 2V
Voltage — Not blowingNot blowing
Approximately 1V

IDLE SWITCH

  1. 1
    Disconnect idle switch harness connector.
    Idle switch with terminals a, b, c labeled and ohmmeter connected between terminals a and b
    SEF432H
  2. 2
    Check continuity between terminals (a) and (b).
    Idle switch with terminals a, b, c labeled and ohmmeter connected between terminals a and b
    SEF432H

Idle Switch Continuity

Completely released
ContinuityYes
Depressed
ContinuityNo

THROTTLE SENSOR

  1. 1
    Disconnect throttle sensor harness connector.
    Throttle sensor side view with terminals a, b, c labeled and ohmmeter connected between terminals b and c
    SEF433H
  2. 2
    Make sure that resistance between terminals (b) and (c) changes when opening throttle valve manually.
    Throttle sensor side view with terminals a, b, c labeled and ohmmeter connected between terminals b and c
    SEF433H

Throttle Sensor Resistance

Completely released
ResistanceApproximately 1 kΩ
Partially depressed
Resistance1 - 9 kΩ
Completely depressed
ResistanceApproximately 9 kΩ

ENGINE TEMPERATURE SENSOR

  1. 1
    Disconnect engine temperature sensor harness connector.
    Engine temperature sensor with ohmmeter connected to sensor terminals
    SEF434H
  2. 2
    Check engine temperature sensor resistance.
    Engine temperature sensor with ohmmeter connected to sensor terminals
    SEF434H

Engine Temperature Sensor Resistance

20 (68)
Resistance (kΩ)Approx. 2.5
80 (176)
Resistance (kΩ)Approx. 0.3
Continue to EF & EC-125

Cross References

EF & EC-123

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