EF & EC-71: TROUBLE DIAGNOSES — Self-diagnosis — Mode III (Cont'd) DECODING CHART

Decoding Chart Column Headers

Display code	Malfunctioning circuit or parts	Control unit shows a malfunction signal when the following conditions are detected.

Code No. 11 — CRANK ANGLE SENSOR

Probable Cause

Corrective Action

Code No. 11 Display code: Red (2 LEDs lit) → Green (2 LEDs lit) (2 LEDs below)

Crank angle sensor circuit

• 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.

SYSTEM INSPECTION See page EF & EC-82.

Cause

Code No. 11 Display code: Red (2 LEDs lit) → Green (2 LEDs lit) (2 LEDs below)

Fix

Crank angle sensor circuit

Cause

Crank angle sensor circuit

Fix

• 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.

Cause

• 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.

Fix

SYSTEM INSPECTION See page EF & EC-82.

Code No. 12 — AIR FLOW METER

Probable Cause

Corrective Action

Code No. 12 Display code: Red (2 LEDs lit) → Green (2 LEDs lit) (2 LEDs below, 2 below)

Air flow meter circuit

• The air flow meter circuit is open or shorted. (An abnormally high or low voltage is entered.)

SYSTEM INSPECTION See page EF & EC-84.

Cause

Code No. 12 Display code: Red (2 LEDs lit) → Green (2 LEDs lit) (2 LEDs below, 2 below)

Fix

Air flow meter circuit

Cause

Air flow meter circuit

Fix

• The air flow meter circuit is open or shorted. (An abnormally high or low voltage is entered.)

Cause

• The air flow meter circuit is open or shorted. (An abnormally high or low voltage is entered.)

Fix

SYSTEM INSPECTION See page EF & EC-84.

Code No. 13 — ENGINE TEMPERATURE SENSOR

Probable Cause

Corrective Action

Code No. 13 Display code: Red (2 LEDs lit) → Green (3 LEDs lit) (1 LED below, 3 below)

Engine temperature sensor circuit

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

SYSTEM INSPECTION See page EF & EC-86.

Cause

Code No. 13 Display code: Red (2 LEDs lit) → Green (3 LEDs lit) (1 LED below, 3 below)

Fix

Engine temperature sensor circuit

Cause

Engine temperature sensor circuit

Fix

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

Cause

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

Fix

SYSTEM INSPECTION See page EF & EC-86.

Code No. 21 — IGNITION SIGNAL

Probable Cause

Corrective Action

Code No. 21 Display code: Red (2 LEDs lit) → Green (1 LED lit) (2 LEDs below, 1 below)

Ignition signal circuit

• The circuit between power transistor unit and E.C.U. is opened.

SYSTEM INSPECTION See page EF & EC-90.

Cause

Code No. 21 Display code: Red (2 LEDs lit) → Green (1 LED lit) (2 LEDs below, 1 below)

Fix

Ignition signal circuit

Cause

Ignition signal circuit

Fix

• The circuit between power transistor unit and E.C.U. is opened.

Cause

• The circuit between power transistor unit and E.C.U. is opened.

Fix

SYSTEM INSPECTION See page EF & EC-90.

TROUBLE DIAGNOSES — Self-diagnosis — Mode III (Cont'd) DECODING CHART

Self-diagnosis — Mode III (Cont'd)

DECODING CHART

Decoding Chart Column Headers

Code No. 11 — CRANK ANGLE SENSOR

Code No. 12 — AIR FLOW METER

Code No. 13 — ENGINE TEMPERATURE SENSOR

Code No. 21 — IGNITION SIGNAL

Cross References

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