ON-BOARD DIAGNOSTIC SYSTEM TEST MODE [PCM (SKYACTIV-G 2.0)]

2016 – MX-5 – Engine

ON-BOARD DIAGNOSTIC SYSTEM TEST MODE [PCM (SKYACTIV-G 2.0)]

Diagnostic Test Mode

To match the OBD-II regulations, the following diagnostic test modes are supported.

Diagnostic test mode	Item
Mode 01	Sending diagnostic data (PID data monitor/On-board system readiness test)
Mode 02	Sending freeze frame data
Mode 03	Sending emission-related malfunction code (Diagnostic trouble code: DTC)
Mode 04	Clearing/resetting emission-related malfunction information
Mode 06	Sending intermittent monitoring system test results (DMTR)
Mode 07	Sending continuous monitoring system test results (Pending code)
Mode 08	On-board device control (Simulation test, active command mode)
Mode 09	Request vehicle information

Sending Diagnostic Data (Mode 01)

PID data monitor

The PID data monitor items are shown below.

PID data monitor table—: Not applicable

Full names	Unit
Monitor status since DTCs cleared	No unit
Fuel system loop status	Refer to list below.
LOAD	%
ECT	°C, °F
Short term fuel trim	%
Long term fuel trim	%
MAP	KPa , mBar , psi, in H20
Engine speed	rpm
Vehicle speed	km/h, mph
Spark advance	°(deg)
IAT	°C, °F
MAF	g/s
Absolute TP	%
A/F sensor and HO2S location	No unit
Input voltage from HO2S	V
OBD requirement according to vehicle design	No unit
Time since engine start	s
Distance travelled while check engine light is activated	km, miles
Fuel pressure	KPa , mBar , psi, in H20
Purge solenoid valve control signal	%
Fuel level input	%
Number of warm-up since DTCs cleared	No unit
Distance travelled since DTCs cleared	km, miles
EVAP system vapor pressure	KPa , mBar , psi, in H20
Barometric pressure	KPa , mBar , psi, in H20
A/F sensor output current	mA
Estimated catalyst converter temperature	°C, °F
Monitor status this driving cycle	—
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 valve actuator control signal	%
Short term fuel trim (HO2S)	%
Long term fuel trim (HO2S)	%

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: A/F sensor, 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 system

Sending Freeze Frame Data (Mode 02)

Freeze frame data

The freeze frame data consists of data for vehicle and engine control system operation conditions when malfunctions in the engine control system are detected and stored in the PCM.
Freeze frame data is stored at the instant the check engine light illuminates, and only a part of the DTC data is stored.
If there are several malfunctions in the engine control system, only the data for the first malfunction will be stored.
If a misfire or fuel injection control malfunction occurs, this data will overwrite the first malfunction that was stored.
If the first stored freeze frame data is a misfire or fuel injection control malfunction, the data will not be overwritten.

Snapshot data

The snapshot data stores the currently detected DTC data.
The recording timing for the freeze frame data/snapshot data differs depending on the number of DTC drive cycles.

For a DTC with a drive cycle number 1, only the malfunction determination data is recorded.
For a DTC with a drive cycle number 2, both the malfunction determination and undetermined data is recorded.

Freeze frame data table

—: Not applicable

Freeze frame data item	Unit	Description	Corresponding PID data monitor item
FUELSYS1	Open Loop/Closed Loop/OL-Drive/OL-Fault/CL-Fault	Fuel system status	FUELSYS
LOAD	%	Calculated engine load	—
ECT	°C, °F	Engine coolant temperature	ECT
SFT1	%	Short term fuel trim	SHRTFT1
LFT1	%	Long term fuel trim	LONGFT1
MAP	KPa , mBar , psi, in H20	Manifold absolute pressure	MAP
RPM	RPM	Engine speed	RPM
VS	KPH, MPH	Vehicle speed	VSS
SPARKADV	°(deg)	Ignition timing	SPARKADV
IAT	°C, °F	Intake air temperature	IAT
MAF	g/sec	Mass airflow	MAF
TP	%	Throttle valve position No.1	TP1
RUNTM	hh:mm:ss	Time from engine start	—
EVAPPCT	%	Purge solenoid valve controlled value	—
FLI	%	Fuel level in fuel tank	FLI
WARMUPS	—	Number of warm-up cycle after DTC cleared	—
CLRDIST	km, ft, mi	Mileage after DTC cleared	—
FTP	KPa , mBar , psi, in H20	Evaporative (EVAP) system vapor pressure	FTP
BARO	KPa , mBar , psi, in H20	Barometric pressure	BARO
CATTEMP11	°C, °F	Estimated catalytic converter temperature	CATT11_DSD
VPWR	V	Module supply voltage	VPWR
ALV	%	Engine load	LOAD
EQ_RAT	—	Target equivalence ratio (lambda)	EQ_RAT11_DSD
TP_REL	%	Relative throttle position	TP_REL
AAT	°C, °F	Ambient air temperature	AAT
TP_B	%	Throttle valve position No.2	TP2
APP_D	%	Accelerator pedal position No.1	APP1
APP_E	%	Accelerator pedal position No.2	APP2
TAC_PCT	%	Target throttle valve position	ETC_DSD
FUEL_TYP	NONE/Gas/METH/ETH/DSL/ELEC	Type of fuel currently being utilized by the vehicle	—
STSO2FT1	%	Short term fuel trim (HO2S)	SHRTFT12
LGSO2FT1	%	Long term fuel trim (HO2S)	LONGFT12
FRP	KPa , mBar , psi, in H20	Fuel pressure (absolute)	FUEL_PRES
ECT1_SUP	No/Yes	Engine coolant temperature No.1 support	—
ECT2_SUP	No/Yes	Engine coolant temperature No.2 support	—
ECT1	°C, °F	Engine coolant temperature No.1	—
ECT2	°C, °F	Engine coolant temperature No.2	—
IAT11_SUP	No/Yes	Intake air temperature No.1 support	—
IAT12_SUP	No/Yes	Intake air temperature No.2 support	—
IAT11	°C, °F	Intake air temperature No.1	—
IAT12	°C, °F	Intake air temperature No.2	IAT2

Snapshot data table

—: Not applicable

Snapshot data item	Unit	Definition	Data read/use method	Corresponding PID data monitor item
ALTT_V	V	Generator output voltage	—	ALTT V
MIL	Off/On	Check engine light illumination status	—	MIL
APP1	V	Accelerator pedal position No.1	—	APP1
APP1	%	Accelerator pedal position No.1	—	APP1
APP2	V	Accelerator pedal position No.2	—	APP2
APP2	%	Accelerator pedal position No.2	—	APP2
TP1	V	Throttle valve position No.1	—	TP1
TP1	%	Throttle valve position No.1	—	TP1
TP2	V	Throttle valve position No.2	—	TP2
TP2	%	Throttle valve position No.2	—	TP2
ALT_CUR_DSD	A	Generator current desired	—	—
BATT_RES	mΩ	Battery inferred internal resistance	—	—
TOTAL_TIME	hh:mm:ss	Total time	The elapsed time when the PCM detected a DTC can be calculated by performing the following procedure. Verify the instrument cluster PID item TOTAL_TIME. Verify the snapshot data item TOTAL_TIME. Subtract 2 from 1.	—
TOTAL_DIST	km, ft, mi	Total distance	The distance traveled when the PCM detected a DTC can be calculated by performing the following procedure. Verify the odometer value in the instrument cluster. Verify the snapshot data item TOTAL_DIST. Subtract 2 from 1.	—
FUELSYS	OL/CL/OL-Drive/OL-Fault/CL-Fault	Fuel system status	—	FUELSYS
LOAD_C	%	Calculated engine load	—	—
ECT	°C, °F	Engine coolant temperature	—	ECT
SHRTFT1	%	Short term fuel trim	—	SHRTFT1
LONGFT1	%	Long term fuel trim	—	LONGFT1
MAP	KPa , mBar , psi, in H20	Manifold absolute pressure	—	MAP
RPM	RPM	Engine speed	—	RPM
VSS	KPH, MPH	Vehicle speed	—	VSS
SPARKADV	°(deg)	Ignition timing	—	SPARKADV
IAT	°C, °F	Intake air temperature No.1	—	IAT
MAF	g/sec	Mass airflow	—	MAF
O2S12	V	HO2S	—	O2S12
EG_RUN_TIME	hh:mm:ss	Time from engine start	—	—
FUEL_PRES	KPa , mBar , psi, in H20	Fuel pressure	—	FUEL_PRES
SEGRP_DSD	%	Target EGR valve position	—	—
EVAPCP	%	Purge solenoid valve controlled value	—	—
FLI	%	Fuel level in fuel tank	—	FLI
CLR_CNT	—	Number of warm-up cycle after DTC cleared	—	—
CLR_DIST	km, ft, mi	Mileage after DTC cleared	—	—
FTP	KPa , mBar , psi, in H20	Fuel tank pressure	—	FTP
BARO	KPa , mBar , psi, in H20	Barometric pressure	—	BARO
CATT11_DSD	°C, °F	Estimated catalytic converter temperature	—	CATT11_DSD
VPWR	V	Module supply voltage	—	VPWR
LOAD	%	Engine load	—	LOAD
EQ_RAT11_DSD	—	Target equivalence ratio (lambda)	—	EQ_RAT11_DSD
TP_REL	%	Relative throttle position	—	TP_REL
AAT	°C, °F	Ambient air temperature	—	AAT
ETC_DSD	%	Target throttle valve position	—	ETC_DSD
FUEL_TYP	NONE/Gas/METH/ETH/DSL/ELEC	Type of fuel currently being utilized by the vehicle	—	—
SHRTFT12	%	Short term fuel trim (HO2S)	—	SHRTFT12
LONGFT12	%	Long term fuel trim (HO2S)	—	LONGFT12
FRP	KPa , mBar , psi, in H20	Fuel pressure (absolute)	—	FUEL_PRES
ECT2_SUP	No/Yes	Engine coolant temperature No.2 support	—	—
ECT2	°C, °F	Engine coolant temperature No.2	—	—
IAT12	°C, °F	Intake air temperature No.2	—	IAT2

DTC 7-Digit Code Definition

When related systems or components have failed, the CM stores the DTC of the malfunctioning part in the CM memory, and allows for the retrieval of the stored data using a scan tool when necessary. The DTCs are indicated using seven digits. Each digit indicates the following.

Status Byte for DTC

The two digits (two digits after hyphen (-)) after the 7-digit DTC.
A code which indicates the pending code, current/past malfunction status, or warning illumination status.
Can be read by performing a CMDTC self-test using the Mazda Modular Diagnostic System (M-MDS).
For details on the status byte, refer to the explanation on the Mazda Modular Diagnostic System (M-MDS) when reading the DTC.

Sending Emission-related Malfunction Code (DTC) (Mode 03)

The DTCs are shown below.

×: Applicable—: Not applicable

DTC No.

Check engine light

Master warning light

Charging system warning light

Engine oil warning light

Wrench indicator light

Check fuel cap warning light

Condition

Fail-safe function

Drive cycle

Monitor item

Self test type^*1

Memory function

B10A2:00

OFF

Vehicle collision

Other

P0010:00

OFF

Electric variable valve timing control circuit range/performance problem

CCM

C, R

P0011:00

OFF

Electric variable valve timing control system: over-advanced

—

CCM

P0012:00

OFF

Electric variable valve timing control system: over-retarded

—

CCM

P0014:00

ON^*6

OFF

Hydraulic variable valve timing control system: over-advanced

—

CCM

P0015:00

ON^*6

OFF

Hydraulic variable valve timing control system: over-retarded

—

CCM

P0016:00^*8

OFF

CKP-CMP (intake side) correlation problem

—

CCM

P0017:00^*8

OFF

CKP-CMP (exhaust side) correlation problem

—

CCM

P0031:00

OFF

A/F sensor heater control circuit low input