Code Numbers - Mazda MX-5 1990 Workshop Manual

F
SELF-DIAGNOSIS FUNCTION
Code Numbers
Malfunction display
Code Pattern of output signal
Sensor or subsystem Self-diagnosis
Fail-safe
No. (Self-Diagnosis Checker)
Ignition pulse
No IGf-signal
-
ON~
01
OFF
ON~
Ne-signal No Ne-signal
-
02
OFF
G-signal
No G-signal
-
ON~
03
OFF
Airflow meter
Open or short circuit Basic fuel injection amount
ON~
fixed as for two driving
08
modes
OFF
(1) Idle switch: ON
(2) Idle switch: OFF
ON~
Water thermosensor Open or short circuit Maintains constant
09
200(68°F) command
OFF
ON~
Intake air thermosensor Open or short circuit Maintains constant
10
(Airflow meter)
20°C (68°F) command
OFF
ON~
Atmospheric pressure Open or short circuit Maintains constant
14
sensor command of sea level
OFF
pressure
~~~UU
Oxygen sensor
Sensor output continues
Cancels engine feedback
15
less than 0.45V 180 sec. operation
after engine exceeds
1,500 rpm
ON
--.fLJlWLJl
Feedback system
Sensor output continues Cancels engine feedback
17
unchanged 20 sec. after operation
OFF
engine exceeds
1,500 rpm
ON
JlfLIlliLJR
Solenoid valve -
26
(Purge control)
OFF
-
ON~
ISC valve -
34
OFF
05UOFX-075
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.
F-80
-.