MX-5 NA Service ManualMX-5 NA

Torque Specs Tools Parts Diagrams

SELF-DIAGNOSIS FUNCTION

F-80spec table

Continued from F-79

Code Numbers

Malfunction Code Numbers

Code No.	Pattern of output signal (Self-Diagnosis Checker)	Sensor or subsystem	Self-diagnosis	Fail-safe
01	ON/OFF buzzer pattern	Ignition pulse	No IGf-signal	—
02	ON/OFF buzzer pattern	Ne-signal	No Ne-signal	—
03	ON/OFF buzzer pattern	G-signal	No G-signal	—
08	ON/OFF buzzer pattern	Airflow meter	Open or short circuit	Basic fuel injection amount fixed as for two driving modes (1) Idle switch: ON (2) Idle switch: OFF
09	ON/OFF buzzer pattern	Water thermosensor	Open or short circuit	Maintains constant 20°(68°F) command
10	ON/OFF buzzer pattern	Intake air thermosensor (Airflow meter)	Open or short circuit	Maintains constant 20°C (68°F) command
14	ON/OFF buzzer pattern	Atmospheric pressure sensor	Open or short circuit	Maintains constant command of sea level pressure
15	ON/OFF buzzer pattern	Oxygen sensor	Sensor output continues less than 0.45V 180 sec. after engine exceeds 1,500 rpm	Cancels engine feedback operation
17	ON/OFF buzzer pattern	Feedback system	Sensor output continues unchanged 20 sec. after engine exceeds 1,500 rpm	Cancels engine feedback operation
26	ON/OFF buzzer pattern	Solenoid valve (Purge control)	—	—
34	ON/OFF buzzer pattern	ISC valve	—	—

01

Pattern of output signal (Self-Diagnosis Checker)ON/OFF buzzer pattern

Sensor or subsystemIgnition pulse

Self-diagnosisNo IGf-signal

Fail-safe—

02

Pattern of output signal (Self-Diagnosis Checker)ON/OFF buzzer pattern

Sensor or subsystemNe-signal

Self-diagnosisNo Ne-signal

Fail-safe—

03

Pattern of output signal (Self-Diagnosis Checker)ON/OFF buzzer pattern

Sensor or subsystemG-signal

Self-diagnosisNo G-signal

Fail-safe—

08

Pattern of output signal (Self-Diagnosis Checker)ON/OFF buzzer pattern

Sensor or subsystemAirflow meter

Self-diagnosisOpen or short circuit

Fail-safeBasic fuel injection amount fixed as for two driving modes (1) Idle switch: ON (2) Idle switch: OFF

09

Pattern of output signal (Self-Diagnosis Checker)ON/OFF buzzer pattern

Sensor or subsystemWater thermosensor

Self-diagnosisOpen or short circuit

Fail-safeMaintains constant 20°(68°F) command

10

Pattern of output signal (Self-Diagnosis Checker)ON/OFF buzzer pattern

Sensor or subsystemIntake air thermosensor (Airflow meter)

Self-diagnosisOpen or short circuit

Fail-safeMaintains constant 20°C (68°F) command

14

Pattern of output signal (Self-Diagnosis Checker)ON/OFF buzzer pattern

Sensor or subsystemAtmospheric pressure sensor

Self-diagnosisOpen or short circuit

Fail-safeMaintains constant command of sea level pressure

15

Pattern of output signal (Self-Diagnosis Checker)ON/OFF buzzer pattern

Sensor or subsystemOxygen sensor

Self-diagnosisSensor output continues less than 0.45V 180 sec. after engine exceeds 1,500 rpm

Fail-safeCancels engine feedback operation

17

Pattern of output signal (Self-Diagnosis Checker)ON/OFF buzzer pattern

Sensor or subsystemFeedback system

Self-diagnosisSensor output continues unchanged 20 sec. after engine exceeds 1,500 rpm

Fail-safeCancels engine feedback operation

26

Pattern of output signal (Self-Diagnosis Checker)ON/OFF buzzer pattern

Sensor or subsystemSolenoid valve (Purge control)

Self-diagnosis—

Fail-safe—

34

Pattern of output signal (Self-Diagnosis Checker)ON/OFF buzzer pattern

Sensor or subsystemISC valve

Self-diagnosis—

Fail-safe—

CAUTION

If there is more than one failure present, the lowest number malfunction code is displayed first, the remaining codes are displayed in order. After repairing all failures, turn off the ignition switch, disconnect the negative battery cable, and depress the brake pedal for 5 seconds to erase the memory of a malfunction code from the engine control unit.

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