Mazda 3 manuals

Mazda 3 Service Manual: PCM Inspection [Mzr 2.0, Mzr 2.5]

Mazda 3 Service Manual / Engine / Control / Information / PCM Inspection [Mzr 2.0, Mzr 2.5]

Using M-MDS

NOTE:

1. Connect the M-MDS to the DLC-2.


2. Switch the ignition to ON.

3. Measure the PID value.

NOTE:

PID/DATA monitor table (reference)

Monitor item (Definition)

Unit/Condition

Condition/Specification (Reference)

Inspection item

PCM terminal

AAT

(Ambient air temperature)

C

F

Indicates the ambient air temperature

IAT sensor

1AT

AC_REQ

(A/C request signal)

OFF/ON

A/C switch OFF: OFF

A/C switch ON: ON

Perform applicable

DTC troubleshooting

ACCS

(A/C relay)

OFF/ON

A/C relay OFF: OFF

A/C relay ON: ON

A/C relay

Inspect following PIDs: RPM, TP REL, ECT.

1I

AFR

(Target air fuel ratio)

Target air fuel ratio is displayed

A/F sensor

2Z

2AC

2AD

AFR_ACT

(Actual air fuel ratio)

Actual air fuel ratio is displayed

A/F sensor

2Z

2AC

2AD

ALTF

(Generator field coil control duty value)

%

Just after A/C switch ON and fan switch ON at idle: Duty value rises

Generator

Inspect following PIDs: IAT, ECT, RPM, VPWR, ALTT V.

2AA

ALTT V

(Generator output voltage)

V

Switch the ignition to ON: 0 V

Idle: approx. 14 V*1 (E/L not operating)

Generator

2AF

APP

(APP sensor)

%

  • Accelerator pedal released: approx. 0 %

  • Accelerator pedal depressed: approx. 100 %

APP sensor

1X

1AP

APP 1

(APP sensor No.1)

%

  • Accelerator pedal released: approx. 15 %

  • Accelerator pedal depressed: approx. 80 %

APP sensor

1AP

V

  • Accelerator pedal released: approx. 0.4 V

  • Accelerator pedal depressed: approx. 3.3 V

APP 2

(APP sensor No.2)

%

  • Accelerator pedal released: approx. 7.5 %

  • Accelerator pedal depressed: approx. 42 %

APP sensor

1X

V

  • Accelerator pedal released: approx. 0.4 V

  • Accelerator pedal depressed: approx. 2.0 V

ARPMDES

(Target engine speed)

RPM

  • Indicate the target engine speed

Inspect following PIDs: IAT, RPM, MAP, ECT, MAF, TP REL, INGEAR, ALTT V.

BARO

(Barometric pressure)

kPa, psi, Bar

Indicate the BARO

BARO sensor

V

  • Switch the ignition to ON (at sea level): approx. 4.1 V

BOO

(Brake switch)

OFF/ON

Brake pedal depressed: ON

Brake pedal released: OFF

Brake switch No.1

1AB

BPA

(Brake pressure applied switch)

OFF/ON

Brake pedal depressed: ON

Brake pedal released: OFF

Brake switch No.2

CATT11_DSD

(Desired catalyst temperature bank one, sensor one)

C

Indicate the estimated catalytic converter temperature

Perform applicable DTC troubleshooting.

CHRGLP

(Generator warning light)

OFF/ON

Switch the ignition to ON: ON

Idle: OFF

Perform applicable DTC troubleshooting.

COLP

(Refrigerant pressure sensor)

OFF/ON

Refrigerant pressure is above 1.96 Mpa {20.0kgf/cm2, 284 psi}: ON

Refrigerant pressure sensor

CPP*2

(Clutch pedal position)

OFF/ON

Clutch pedal depressed: ON

Clutch pedal released: OFF

CPP switch

1BD

CPP/PNP*2

(Shift lever position)

OFF/ON

Neutral position: ON

Others: OFF

Neutral switch

1BC

ECT

(Engine coolant temperature No.1)

C

F

Indicate the ECT No.1

ECT sensor No.1

2AH

V

ECT 20 C {68 F}: 3.043.14 V

ECT 80 C {176 F}: 0.760.83 V

ECT2

(Engine coolant temperature No.2)

C

F

Indicate the ECT No.2

ECT sensor No.2

2AO

V

ECT 20 C {68 F}: 3.043.14 V

ECT 80 C {176 F}: 0.760.83 V

EQ_RAT11

(Equivalence ratio (lambda))

Idling after warm-up: approx. 1

Perform applicable DTC troubleshooting.

2Z

2AC

2AD

EQ_RAT11_DSD

(Desired equivalence ratio (lambda))

Idling after warm-up: approx. 1

Perform applicable DTC troubleshooting.

ETC_ACT

(Electronic throttle control actual)

Indicate the desired TP by angle

Perform applicable DTC troubleshooting.

2BE, 2BF

ETC_DSD

(Electronic throttle control desired)

%

Indicate the desired TP by percent

TP sensor

Inspect following PIDs:APP1, APP2, ETC_ACT.

Indicate the desired TP by angle

EVAPCP

(Purge solenoid valve duty value)

%

Switch the ignition to ON: 0%

Idle: 0%

Inspect following PIDs: IAT, RPM, ECT, MAF, O2S11, INGEAR, VPWR.

1BA

EVAPCV

(Evaporative emission canister vent valve)

OFF/ON

Simulation item (EVAPCV) is ON: ON

CV solenoid valve

1M

FAN_DUTY

(Fan control module)

%

  • When all of following condition are met: 50%

    • Test mode ON

    • WOT

Fan control module

1R

FCL

(Fuel cap warning light)

OFF/ON

  • Fuel cap warning light not illuminated: OFF

  • Fuel cap warning light illuminated: ON

Perform applicable DTC troubleshooting.

FLI

(Fuel level)

%

  • Fuel gauge level F: approx. 100%

  • Fuel gauge level E: approx. 0%

Perform applicable DTC troubleshooting.

FP

(Fuel pump relay)

OFF/ON

Switch the ignition to ON: OFF

Idle: ON

Cranking: ON

Fuel pump relay

Inspect following PIDs: RPM.

1BG

FTP

(Fuel tank pressure sensor)

kPa, psi, Bar

Indicate the fuel tank pressure

Fuel tank pressure sensor

1AH

V

Fuel tank pressure is equal to barometric pressure: approx. 2.625 V

FUELPW

(Fuel injector duration)

sec

Idle (after warm up): approx. 2.2 ms

Fuel injector

Inspect following PIDs: IAT, MAF, TP REL, MAP, ECT, RPM, O2S11, O2S12, INGEAR, VPWR, ALTT V.

2AZ

2BB

2BC

2BD

FUELSYS

(Fuel system status)

OL/CL/CL-Fault/OL-Fault/OL-Drive

Idle (after warm up): CL

Fuel injector

Inspect following PIDs: IAT, MAF, TP REL, MAP, ECT, RPM, O2S11, O2S12, INGEAR, VPWR, ALTT V.

HTR11

(A/F sensor heater)

OFF/ON

Idle (after warm up): ON⇔OFF

A/F sensor

Inspect following PIDs: IAT, MAF, TP REL, ECT, RPM.

2A

HTR12

(HO2S heater)

OFF/ON

Idle (after warm up): ON⇔OFF

HO2S heater

Inspect following PIDs: IAT, MAF, ECT, RPM.

2B

IAT

(Intake air temperature)

C

F

Indicate the IAT

IAT sensor

1AC

V

IAT 20 C {68 F}: approx. 2.38 V

IAT 60 C {140 F}: approx. 0.89 V

IMRC

(Variable tumble solenoid valve)

OFF/ON

  • ECT below 60 C {140 F} (MZR 2.0) / 63 C {145 F} (MZR 2.5) and engine speed below 3,750 rpm : On

  • ECT above 60 C {140 F} (MZR 2.0) / 63 C {145 F} (MZR 2.5) while idling.: Off

Variable tumble solenoid valve

Inspect following PIDs: TP REL, ECT, RPM.

2I

IMRC_POS

(Variable tumble shutter valve switch)

V

  • ECT below 60 C {140 F} (MZR 2.0) / 63 C {145 F} (MZR 2.5) and engine speed below 3,750 rpm : 3.4084.432 V

  • ECT above 60 C {140 F} (MZR 2.0) / 63 C {145 F} (MZR 2.5) while idling.: 0.8081.832 V

Variable tumble shutter valve switch

2R

IMTV

(Variable Intake air control solenoid valve)

OFF/ON

Engine speed is below approx. 4,400 rpm (MZR 2.0) / 4,600rpm (MZR 2.5): On

Others: Off

Variable intake air control solenoid valve

Inspect following PIDs: RPM.

2J

INGEAR

(Load/no load condition)

OFF/ON

    MTX

  • When the following conditions are satisfied: On

    • Other than neutral

    • Clutch pedal released

  • Except above: Off

CPP switch

Neutral switch

1BC

IBD

    ATX

  • Driving range: On

  • Except above: Off

TR switch

ISC_FBK

(ISC feedback value)

ISC feedback value is displayed

PCM

ISC_FBK_LRN

(ISC feedback learning value)

ISC feedback learning value is displayed.

PCM

IVS

(CTP condition)

Idle/Off_Idle

  • CTP: Idle

  • Others: Off Idle

Perform applicable DTC troubleshooting.

KNOCKR

(Knocking retard)

Switch the ignition to ON: 0

Idle: 0

KS

2U

2V

LOAD

(Engine load)

%

Switch the ignition to ON: 0%

Idle (after warm up): approx.15%

Inspect following PIDs: MAP, IAT, MAF, RPM.

LONGFT1

(long term fuel trim (A/F sensor))

%

Idle (after warm up): 1520%

Perform applicable DTC troubleshooting.

LONGFT12

(long term fuel trim (HO2S))

%

Indicate the fuel learning correction amount (HO2S)

Perform applicable DTC troubleshooting.

MAF

(Mass airflow)

g/sec

Indicate the MAF

MAF sensor

1AK

V

Switch the ignition to ON: approx. 0.7 V

Idle (after warm up): approx. 1.2 V

MAP

(Manifold absolute pressure)

kPa, psi, Bar

Indicate the MAP

MAP sensor

2AG

V

  • Switch the ignition to ON (at sea level): approx. 4.1 V

  • Idle: approx. 1.2 V

MIL

(Malfunction indicator lamp)

OFF/ON

  • DTC stored: On

  • DTC not stored: Off

Perform applicable DTC troubleshooting.

MIL_DIS

(Travelled distance since the MIL illuminated)

km

miles

Indicate the travelled distance since the MIL illuminated

O2S11

(A/F sensor)

A

Idle (After warm up): approx. 0 mA

A/F sensor

2Z

2AC

2AD

O2S12

(HO2S)

V

Idle (After warm up): 01.0 V

HO2S

2Q

RO2FT1

(HO2S fuel trim)

%

Idle (after warm up): approx. 0.030.03

Perform applicable DTC troubleshooting.

RPM

(Engine speed)

RPM

Indicate the engine speed

CKP sensor

2W

SC_CANCEL*3

(CANCEL switch)

Inactive/Active

CANCEL switch pressed in: Active

Except above: Inactive

Cruise control switch

1AQ

SC_OFF*3

(ON/OFF switch)

Inactive/Active

ON/OFF switch pressed in (OFF): Active

Except above: Inactive

Cruise control switch

1AQ

SC_ON*3

(ON/OFF switch)

Inactive/Active

ON/OFF switch pressed in (ON): Active

Except above: Inactive

Cruise control switch

1AQ

SC_RES*3

(RESUME switch)

Inactive/Active

RESUME switch pressed in: Active

Except above: Inactive

Cruise control switch

1AQ

SC_SET-*3

(SET(-) switch)

Inactive/Active

SET(-) switch pressed in: Active

Except above: Inactive

Cruise control switch

1AQ

SC_SET+*3

(SET(+) switch)

Inactive/Active

SET(+) switch pressed in: Active

Except above: Inactive

Cruise control switch

1AQ

SCCS*3

(Cruise control switch)

V

ON/OFF switch pressed in (OFF): approx. 0 V

CANCEL switch pressed in: approx. 1.3 V

SET(-) switch pressed in: approx. 2.4 V

SET(+) switch pressed in: approx. 3.2 V

RESUME switch pressed in: approx. 3.9 V

ON/OFF switch pressed in (ON): approx. 4.3 V

Cruise control switch

1AQ

SEGRP

(EGR valve (stepping motor) position)

Switch the ignition to ON: 0

Idle: 0 step

Cranking: 052

EGR valve

Inspect following PIDs: MAF, TP REL, ECT, RPM, VSS.

2AT, 2AX, 2AW, 2BA

SEGRP DSD

(Desired EGR valve position)

%

Indicate the desired EGR valve position

Inspect following PIDs: MAF, TP REL, ECT, RPM, VSS.

SHRTFT1

(Short term fuel trim (A/F sensor))

%

Idle (after warm up): approx.2525%

Perform applicable DTC troubleshooting.

SHRTFT12

(Short term fuel trim (HO2S))

%

Indicate the fuel feedback correction amount (HO2S)

Perform applicable DTC troubleshooting.

SPARKADV

(Ignition timing)

Indicate the ignition timing

Inspect following PIDs: MAF, TP REL, ECT, RPM, INGEAR, VPWR.

2G,

2H,

2K,

2L

Test

(Test mode)

OFF/ON

Test mode ON: On

Test mode OFF: Off

THM_1 (Thermostat monitor engine coolant temperature No.1)

C

F

Indicates engine coolant temperature No.1 when thermostat monitoring is finished

Thermostat

THM_2 (Thermostat monitor engine coolant temperature No.2)

C

F

Indicates engine coolant temperature No.2 when thermostat monitoring is finished

Thermostat

THM_MAX_2 (Thermostat monitor engine coolant temperature No.2 max limit)

C

F

Indicates upper limit of engine coolant temperature No.2 for thermostat monitoring execution

Thermostat

THM_MIN_1 (Thermostat monitor engine coolant temperature No.1 min limit)

C

F

Indicates lower limit of engine coolant temperature No.1 for thermostat monitoring execution

Thermostat

THM_MIN_2 (Thermostat monitor engine coolant temperature No.2 min limit)

C

F

Indicates lower limit of engine coolant temperature No.2 for thermostat monitoring execution

Thermostat

TP REL

(Relative throttle position)

%

Accelerator pedal released: approx. 3%

Accelerator pedal depressed: approx. 75%

TP sensor

2AK

2AL

TP 1

(TP sensor No.1)

%

Accelerator pedal released: approx. 12%

Accelerator pedal depressed: approx. 84%

TP sensor

2AK

V

Accelerator pedal released: approx. 0.7 V

Accelerator pedal depressed: approx. 4.4 V

TP 2

(TP sensor No.2)

%

Accelerator pedal released: approx. 12%

Accelerator pedal depressed: approx. 84%

TP sensor

2AL

V

Accelerator pedal released: approx. 4.3 V

Accelerator pedal depressed: approx. 0.6 V

TPCT

(TP sensor voltage at CTP)

V

approx. 0.5 V

TP sensor

2AK

2AL

VPWR

(Battery positive voltage)

V

Switch the ignition to ON: B+

Battery

1C

VSS

(Vehicle speed)

KPH

Indicate the vehicle speed

Perform applicable DTC troubleshooting.

VT ACT1

(Actual valve timing)

Idle: approx. 0

Racing after warm up: 025

CMP sensor

2S

VT DIFF1

(Difference between target and actual valve timing)

Idle: approx. 0

CMP sensor

OCV

Inspect following PIDs: TP REL, ECT, RPM.

2E

2S

VT DUTY1

(Oil control valve duty value)

%

Idle: approx. 11.5%

OCV

Inspect following PIDs: TP REL, ECT, RPM.

2E


*1 Calculated value; differs from terminal voltage

*2 MTX

*3 With cruise control switch

Without Using the M-MDS

CAUTION:

1. Measure the voltage at each terminal.

Terminal voltage table (Reference)



Terminal

Signal

Connected to

Test condition

Voltage (V)

inspection item

1A

Power supply

Main relay

Switch the ignition to off

Below 1.0

  • Related wiring harness

Switch the ignition to ON

B+

1B

Power supply

Main relay

Switch the ignition to off

Below 1.0

  • Related wiring harness

Switch the ignition to ON

B+

1C

Back-up power supply

Battery

(positive terminal)

Switch the ignition to ON

B+

  • Battery

  • Related wiring harness

1D

1E

GND

Ground

Under any condition

Below 1.0

  • Related wiring harness

1F

GND

Ground

Under any condition

Below 1.0

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