Trouble Diagnoses — Consult (Cont'd)

EF & EC-419spec table

Consult (Cont'd)

WORK SUPPORT MODE

Work Support Mode

Work Item	Condition	Usage
THROTTLE SENSOR ADJUSTMENT	CHECK THE THROTTLE SENSOR SIGNAL. ADJUST IT TO THE SPECIFIED VALUE BY ROTATING THE SENSOR BODY UNDER THE FOLLOWING CONDITIONS. • IGN SW "ON" • ENG NOT RUNNING • ACC PEDAL NOT PRESSED	When adjusting throttle sensor initial position.
IGNITION TIMING ADJUSTMENT	• IGNITION TIMING FEEDBACK CONTROL WILL BE HELD BY TOUCHING "START". AFTER DOING SO, ADJUST IGNITION TIMING WITH A TIMING LIGHT BY TURNING THE CRANK ANGLE SENSOR.	When adjusting initial ignition timing.
AAC VALVE ADJUSTMENT	SET ENGINE RPM AT THE SPECIFIED VALUE UNDER THE FOLLOWING CONDITIONS. • ENGINE WARMED UP • NO-LOAD	When adjusting idle speed.
FUEL PRESSURE RELEASE	• FUEL PUMP WILL STOP BY TOUCHING "START" DURING IDLING. CRANK A FEW TIMES AFTER ENGINE STALLS.	When releasing fuel pressure from fuel line.

THROTTLE SENSOR ADJUSTMENT

ConditionCHECK THE THROTTLE SENSOR SIGNAL. ADJUST IT TO THE SPECIFIED VALUE BY ROTATING THE SENSOR BODY UNDER THE FOLLOWING CONDITIONS. • IGN SW "ON" • ENG NOT RUNNING • ACC PEDAL NOT PRESSED

UsageWhen adjusting throttle sensor initial position.

IGNITION TIMING ADJUSTMENT

Condition• IGNITION TIMING FEEDBACK CONTROL WILL BE HELD BY TOUCHING "START". AFTER DOING SO, ADJUST IGNITION TIMING WITH A TIMING LIGHT BY TURNING THE CRANK ANGLE SENSOR.

UsageWhen adjusting initial ignition timing.

AAC VALVE ADJUSTMENT

ConditionSET ENGINE RPM AT THE SPECIFIED VALUE UNDER THE FOLLOWING CONDITIONS. • ENGINE WARMED UP • NO-LOAD

UsageWhen adjusting idle speed.

FUEL PRESSURE RELEASE

Condition• FUEL PUMP WILL STOP BY TOUCHING "START" DURING IDLING. CRANK A FEW TIMES AFTER ENGINE STALLS.

UsageWhen releasing fuel pressure from fuel line.

SELF-DIAGNOSTIC RESULTS MODE

Self-Diagnostic Results Mode

Diagnostic Item	Diagnostic Item Is Detected When ...	Check Item (Remedy)
CRANK ANGLE SENSOR*	• Either 1° or 180° signal is not entered for the first few seconds during engine cranking. • Either 1° or 180° signal is not input often enough while the engine speed is higher than the specified rpm.	• Harness and connector (If harness and connector are normal, replace crank angle sensor.)
AIR FLOW METER	• The air flow meter circuit is open or shorted. (An abnormally high or low voltage is entered.)	• Harness and connector (If harness and connector are normal, replace air flow meter.)
ENGINE TEMP SENSOR	• The engine temperature sensor circuit is open or shorted. (An abnormally high or low output voltage is entered.)	• Harness and connector • Engine temperature sensor
IGN SIGNAL-PRIMARY*	• The ignition signal in primary circuit is not entered during engine cranking or running.	• Harness and connector • Power transistor unit
DETONATION SENSOR	• The detonation circuit is open or shorted. (An abnormally high or low voltage is entered.)	• Harness and connector • Detonation sensor
THROTTLE SENSOR	The throttle sensor circuit is open or shorted. (An abnormally high or low voltage is entered.)	• Harness and connector • Throttle sensor

CRANK ANGLE SENSOR*

Diagnostic Item Is Detected When ...• Either 1° or 180° signal is not entered for the first few seconds during engine cranking. • Either 1° or 180° signal is not input often enough while the engine speed is higher than the specified rpm.

Check Item (Remedy)• Harness and connector (If harness and connector are normal, replace crank angle sensor.)

AIR FLOW METER

Diagnostic Item Is Detected When ...• The air flow meter circuit is open or shorted. (An abnormally high or low voltage is entered.)

Check Item (Remedy)• Harness and connector (If harness and connector are normal, replace air flow meter.)

ENGINE TEMP SENSOR

Diagnostic Item Is Detected When ...• The engine temperature sensor circuit is open or shorted. (An abnormally high or low output voltage is entered.)

Check Item (Remedy)• Harness and connector • Engine temperature sensor

IGN SIGNAL-PRIMARY*

Diagnostic Item Is Detected When ...• The ignition signal in primary circuit is not entered during engine cranking or running.

Check Item (Remedy)• Harness and connector • Power transistor unit

DETONATION SENSOR

Diagnostic Item Is Detected When ...• The detonation circuit is open or shorted. (An abnormally high or low voltage is entered.)

Check Item (Remedy)• Harness and connector • Detonation sensor

THROTTLE SENSOR

Diagnostic Item Is Detected When ...The throttle sensor circuit is open or shorted. (An abnormally high or low voltage is entered.)

Check Item (Remedy)• Harness and connector • Throttle sensor

NOTE

*: Check items causing a malfunction of crank angle sensor circuit first, if both "CRANK ANGLE SENSOR" and "IGN SIGNAL-PRIMARY" come out at the same time.

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