Mazda 6. Manual - part 26

F–40

ON-BOARD DIAGNOSTIC 

OUTLINE

A6E397018881T01

•

The construction and operation of the on-board diagnostic system is essentially carried over from that of the 
current MPV (LW) GY/FS engine model, except for the following. (See MPV Workshop Manual supplement 
1700-1*-00H.)
— DTCs, PID monitoring items, and simulation items have been changed to match the regulations. For the 

detail information of the regulations, refer to the “OBD Training Manual (3345-1E-00B).”

— KOEO/KOER self-test function has been adopted. Therefore, the present malfunction or a successful 

repair is readily confirmed.

— Pending code storage process has been changed as follows.

1 drive cycle type

•

With the current MPV (LW) GY/FS engine model, pending codes are not available. With the new 
Mazda6 (GG), however, pending code is stored in the PCM during the drive cycle

2 drive cycle type

•

With the current MPV (LW) GY/FS engine model, pending codes are deleted when a DTC is stored. 
With the new Mazda6 (GG), however, even if a DTC is stored, the PCM does not delete the pending 
code until a normal (malfunction repaired) condition judgement is made.

— The conditions by which the MIL for the second drive cycle type illuminates have been changed as follows.

New Mazda6 (GG)

•

PCM determines that there is a malfunction in the first drive cycle when a DTC that has been stored in 
the PCM during previous drive cycles is detected.

Current MPV (LW) GY/FS engine model

•

PCM determines that there is a malfunction in the second drive cycle.

End Of Sie

CONTROL DEVICES AND MONITORING SYSTEM RELATIONSHIP CHART

A6E397018881T02

Monitoring System

×

: Applicable

End Of Sie

ON-BOARD DIAGNOSTIC

Component

Monitor item

Catalyst

Misfire

Fuel system

Oxygen sensor 

Oxygen sensor 

heater

Input

CKP sensor

×

×

×

×

×

CMP sensor

×

×

×

×

×

VSS

×

×

×

MAF sensor

×

×

×

×

×

ECT sensor

×

×

×

×

×

IAT sensor

×

×

×

×

TP sensor

×

×

×

×

Rear HO2S

×

×

×

Front HO2S

×

×

×

×

Output

DLC-2

×

×

×

×

×

MIL

×

×

×

×

×

Purge solenoid valve

×

×

Fuel injectors

×

ON-BOARD DIAGNOSTIC 

F–41

F

DIAGNOSTIC TEST MODE

A6E397018881T03

•

To match the OBD regulations, the following diagnostic test modes have been supported.

•

The diagnostic test modes are as shown below.

Sending Diagnostic Data (Mode 01)
PID data monitor

•

The PID monitoring items are shown in the table.

PID data monitor table

Meaning of FUEL SYS1

On-board system readiness test

•

The items supported by the on-board system readiness test are shown below.
Continuous monitoring system
— Misfire monitoring
— Fuel system monitoring
— Comprehensive component monitoring (CCM)
Intermittent monitoring system
— Catalyst monitoring
— O2S monitoring
— O2S heater monitoring

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 05

Sending oxygen sensor monitor test results

Mode 06

Sending intermittent monitoring system test results (Diagnostic monitoring test result: DMTR)

Mode 07

Sending continuous monitoring system test results (pending code)

Full names

Condition/unit

Diagnostic trouble code counter

–

Malfunction indicator

ON/OFF

Fuel system loop status

Refer to table below.

Engine load calculated value

%

Engine coolant temperature

°

C

°

F

Short fuel trim

%

Long fuel trim

%

Intake manifold absolute pressure

%

kPa

Engine speed

rpm

Vehicle speed

km/h

mph

Spark advance

BTDC

Intake air temperature

°

C

°

F

Mass air flow

g/s

Throttle position

%

Oxygen sensor location

–

Front heated oxygen sensor

V

Rear heated oxygen sensor

V

OBD requirement to which vehicle designed

–

Distance travelled while MI is activated

km

miles

Display

Meaning

-NA-

Not applicable

OPEN

Feedback stops: Engine coolant temperature is lower than the determined feedback zone.

CLOSE

Feedback operating: HO2S being used for feedback is okay.

OP DRV

Feedback stops: Open loop due to driving condition.

OP SYS

Feedback stops: Open loop due to detected system fault.

CL O2S

Feedback operating: Malfunction occurred in HO2S (rear) system.

F–42

ON-BOARD DIAGNOSTIC 

Sending Freeze Frame Data (FFD) (Mode 02)

•

The FFDs are shown in the table.

FFD monitor table

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

•

The DTCs are shown in the table.

DTC table

×

: Applicable

—: Not applicable

Full names

Condition/unit

DTC that caused required FFD storage

–

Fuel system loop status

OPEN: NON-F/B, CLOSE: F/B

Engine load calculated value

%

Engine coolant temperature

°

C

°

F

Short fuel trim

%

Long fuel trim

%

Intake manifold absolute pressure

%

kPa

Engine speed

rpm

Vehicle speed

km/h

mph

Spark advance

BTDC

Intake air temperature

°

C

°

F

Mass air flow

g/s

Throttle position

%

DTC No.

Condition

MIL

DC

Monitor item

Memory 

function

P0010

CMP actuator circuit malfunction

ON

1

CCM

×

P0011

CMP timing over-advanced

ON

1

CCM

×

P0012

CMP timing over-retarded

ON

1

CCM

×

P0031

Front HO2S heater circuit low input

ON

2

O

2

 sensor heater

×

P0032

Front HO2S heater circuit high input

ON

2

O

2

 sensor heater

×

P0037

Rear HO2S heater circuit low input

ON

2

O

2

 sensor heater

×

P0038

Rear HO2S heater circuit high input

ON

2

O

2

 sensor heater

×

P0101

MAF sensor inconsistent with TP sensor

ON

2

CCM

×

P0102

MAF circuit low input

ON

1

CCM

×

P0103

MAF circuit high input

ON

1

CCM

×

P0107

MAP sensor circuit low input

ON

1

CCM

×

P0108

MAP sensor circuit high input

ON

1

CCM

×

P0111

IAT circuit performance problem

ON

2

CCM

×

P0112

IAT circuit low input

ON

1

CCM

×

P0113

IAT circuit high input

ON

1

CCM

×

P0117

ECT circuit low input

ON

1

CCM

×

P0118

ECT circuit high input

ON

1

CCM

×

P0121

TP stuck closed

ON

2

CCM

×

P0122

TP circuit low input

ON

1

CCM

×

P0123

TP circuit high input

ON

1

CCM

×

P0125

Excessive time to enter closed loop fuel control

ON

2

CCM

×

P0131

Front HO2S no inversion (stuck low)

ON

2

CCM

×

P0132

Front HO2S no inversion (stuck high)

ON

2

CCM

×

P0133

Front HO2S circuit malfunction

ON

2

O

2

 sensor

×

P0134

Front HO2S circuit no activity detected

ON

2

CCM

×

P0138

Rear HO2S circuit high input

ON

2

CCM

×

P0140

Rear HO2S circuit no activity detected

ON

2

CCM

×

P0171

Fuel trim system too lean

ON

2

Fuel

×

P0172

Fuel trim system too rich

ON

2

Fuel

×

P0300

Random misfire detected

Flash / ON

1 or 2

Misfire

×

P0301

Cylinder No.1 misfire detected

Flash / ON

1 or 2

Misfire

×

P0302

Cylinder No.2 misfire detected

Flash / ON

1 or 2

Misfire

×

ON-BOARD DIAGNOSTIC 

F–43

F

P0303

Cylinder No.3 misfire detected

Flash / ON

1 or 2

Misfire

×

P0304

Cylinder No.4 misfire detected

Flash / ON

1 or 2

Misfire

×

P0327

Knock sensor circuit low input

ON

1

CCM

×

P0328

Knock sensor circuit high input

ON

1

CCM

×

P0335

CKP sensor circuit malfunction

ON

1

CCM

×

P0340

CMP sensor circuit malfunction

ON

1

CCM

×

P0403

EGR valve motor coils open or short

ON

2

CCM

×

P0420

Catalyst system efficiency below threshold

ON

2

Catalyst

×

P0443

Evaporative emission control system purge control 
valve circuit malfunction

ON

2

CCM

×

P0480

Fan relay control circuit malfunction

OFF

2

Other

×

P0500

Vehicle speed sensor (VSS) circuit malfunction

ON

2

CCM

×

P0505

Idle control system malfunction

OFF

—

Other

—

P0506

Idle control system RPM lower than expected

ON

2

CCM

×

P0507

Idle control system RPM higher than expected

ON

2

CCM

×

P0511

Idle control system circuit malfunction

ON

1

CCM

×

P0550

PSP switch circuit malfunction

ON

2

CCM

×

P0602

PCM programming error

ON

1

CCM

×

P0610

Control module vehicle options error

ON

1

CCM

×

P0661

VIS control circuit low input

OFF

2

Other

×

P0662

VIS control circuit high input

OFF

2

Other

×

P0703

Brake switch input malfunction

ON

2

CCM

×

P0704

Clutch switch input malfunction

ON

2

CCM

×

P0850

Neutral switch input malfunction

ON

2

CCM

×

P1410

Variable air duct valve circuit malfunction

OFF

2

Other

×

P1562

PCM +BB voltage low

ON

1

CCM

×

P2006

Variable tumble control system shutter valve stuck 
closed

ON

2

CCM

×

P2009

Variable tumble control solenoid valve circuit low 
input

ON

2

CCM

×

P2010

Variable tumble control solenoid valve circuit high 
input

ON

2

CCM

×

P2228

BARO sensor circuit low input

ON

1

CCM

×

P2229

BARO sensor circuit high input

ON

1

CCM

×

P2502

Generator output voltage signal no electricity

OFF

1

Other

—

P2503

Battery overcharge

OFF

1

Other

—

P2504

Generator terminal B circuit open

OFF

1

Other

—

U0073

CAN bus off

OFF

1

Other

—

U0121

PCM cannot receive any signals from ABS, ABS/TCS 
or DSC HU/CM

ON

1

Other

×

U0155

PCM cannot receive any signals from instrument 
cluster

ON

1

Other

×

DTC No.

Condition

MIL

DC

Monitor item

Memory 

function