ON-BOARD DIAGNOSTIC [LF]
01-02–3
Mazda MX-5
On-board system readiness test
• The items supported by the on-board system readiness test are shown below.
Continuous monitoring system
— HO2S heater
— HO2S
— Fuel system
— Misfire
— CCM
Intermittent monitoring system
— HO2S heater
— HO2S
— Catalyst
— EGR system
— Evaporative system
— Engine cooling system
— Cold start emission reduction strategy monitoring
Sending Freeze Frame Data
• The Freeze Frame Data monitor items are shown below.
Freeze frame data monitor table
Meaning of fuel system loop status
• The following information is displayed on the tester.
— Feedback stops: ECT is lower than the determined feedback zone.
— Feedback operating: HO2S being used for feedback is normal.
— Feedback stops: Open loop due to driving condition
— Feedback stops: Open loop due to detected system fault
— Feedback operating: Malfunction occurred in HO2S (rear) system
Full names Unit
DTC that caused required Freeze Frame Data storage No unit
Fuel system loop status Refer to list below.
LOAD %
ECT °C °F
Short term fuel trim %
Long term fuel trim %
MAP kPa
Engine speed rpm
Vehicle speed km/h mph
Spark advance °
IAT °C °F
MAF g/s
Absolute TP %
Time since engine start s
EGR valve control signal %
Purge solenoid valve control signal %
Fuel level %
Number of warm-ups since DTCs cleared No unit
Distance travelled since DTCs cleared km miles
Barometric pressure kPa
Estimated catalyst converter temperature °C °F
PCM voltage V
Absolute load value %
Theoretical air/fuel ratio coefficient to calculate target air/fuel ratio No unit
Relative TP %
Ambient air temperature °C °F
TP from TP sensor No.2 %
APP from APP sensor No.1 %
APP from APP sensor No.2 %
Throttle actuator control signal %
3404-1U-05F(01-02).fm 3 ページ ２００６年７月３日 月曜日 午前９時５０分
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