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Drew
Drew, Super Mazda Tech.
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I have a 2000 Mazda Millenia. My check engine light came on. There are 3 codes that I ne

Resolved Question:

I have a 2000 Mazda Millenia. My check engine light came on. There are 3 codes that I need help with. P1170, P0455, and P0400. What are the probable causes and fixes for these codes?
Thank you.
Submitted: 2 years ago.
Category: Mazda
Expert:  Drew replied 2 years ago.

Welcome to Just Answer. My name is XXXXX XXXXX I will be glad to assist you.

 

Here is the diagnosis test for each of your fault codes.

Please let me know if you have any additional questions by hitting the reply button.

Thanks

Drew

 

DTC P1170

DTC P1173

HO2S (Front, RH) no inversion

HO2S (Front, LH) no inversion

DETECTION CONDITION

  • PCM monitors input voltage from front HO2S when the following monitoring conditions are met. If input voltage from sensor remains below or a bove 0.45 V for 43.2 seconds, PCM determines that there is no HO2S (Front, RH/LH) inversion.

      MONITORING CONDITIONS
    • Engine speed is above 1,500 rpm.

    • Engine coolant temperature is above 80° C {176° F}.

    Diagnostic support note
  • This is a continuous monitor (CCM).

  • MIL illuminates if PCM detects the above malfunction condition in two consecutive drive cycles.

  • PENDING CODE is available if PCM detects the above malfunction condition during first drive cycle.

  • FREEZE FRAME DATA is available.

  • DTC is stored in PCM memory.

POSSIBLE CAUSE

  • Front HO2S malfunction

  • Front HO2S heater malfunction

  • Fuel injector malfunction

  • Pressure regulator malfunction

  • Fuel pump malfunction

  • Fuel delivery hose clogging or leakage

  • Fuel filter clogging

  • Fuel return hose clogging or leakage

  • Air suction or leakage

  • PCV valve malfunction

  • Purge solenoid valve malfunction

  • Purge solenoid hoses are hooked up incorrectly.

  • Ignition coil malfunction

  • Insufficient compression

  • Engine malfunction


Diagnostic procedure

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
  • Has FREEZE FRAME DATA been recorded?

Yes

Go to next step.

No

Record FREEZE FRAME DATA on repair order, then go to next step.

2

VERIFY RELATED REPAIR INFORMATION AVAILABILITY
  • Check for related Service Bulletins and/or on-line repair information availability.

  • Is any related repair information available?

Yes

Perform repair or diagnosis according to available repair information.

  • If vehicle is not repaired, go to next step.

No

Go to next step.

3

VERIFY RELATED PENDING AND STORED DTCs
  • Turn ignition key to OFF, then ON (Engine OFF).

  • Verify pending and stored DTCs using NGS tester.

  • Is other DTC present?

Yes

Go to appropriate DTC troubleshooting procedures.

No

Go to next step.

4

IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
  • Is DTC P1170 or P1173 on FREEZE FRAME DATA?

Yes

Go to next step.

No

Go to troubleshooting procedures for DTC on FREEZE FRAME DATA.

5

VERIFY CURRENT INPUT SIGNAL STATUS-IS CONCERN INTERMITTENT OR CONSTANT
  • Warm up engine.

  • Access FHO2SR for P1170 or FHO2SL for P1173 PID using NGS tester.

  • Verify PID while racing engine (in PARK).

  • Is PID reading okay?

    • More than 0.45 V when suddenly depressing accelerator pedal (rich condition)

    • Less than 0.45 V just after release of accelerator pedal (lean condition)

Yes

Go to next step.

No

Replace front HO2S, then go to Step 21.

6

INSPECT LONG TERM FUEL TRIM
  • Access LONGFT1 for P1170 or LONGFT2 for P1173 PID using NGS tester.

  • Compare it with FREEZE FRAME DATA recorded at Step1.

  • Was it decreased?

Yes

Engine is driven under rich condition. Go to next step.

No

Engine is driven under lean condition. Go to Step 10.

7

INSPECT FUEL LINE PRESSURE (EXCESSIVE FUEL LINE PRESSURE)
  • Is fuel line pressure within 310- 350 kPa {3.1-3.6 kgf/cm 2, 45-51 psi}?

Yes

Go to Step 9.

No

Go to next step.

8

VERIFY VACUUM IS LEADING TO PRESSURE REGULATOR
  • Disconnect vacuum hose from pressure regulator.

  • Verify that vacuum is felt at opening port of disconnected vacuum hose.

  • Is vacuum felt?

Yes

Inspect following parts and repair or replace if necessary:

  • Fuel pump maximum pressure

  • Fuel return hose for clogging

    • If all items above are okay, replace pressure regulator. Then, go to Step 21.

No

Verify vacuum hoses are connected correctly.

  • If okay, replace PRC solenoid valve. Then go to Step 21.

  • If not, reconnect vacuum hoses to correct position. Then go to Step 21.

9

INSPECT PURGE SOLENOID VALVE FOR STUCK OPEN
  • Turn ignition key to OFF.

  • Disconnect both hoses from purge solenoid valve.

  • Blow air through purge solenoid valve.

  • Does air blow through?

Yes

Replace purge solenoid valve.

No

Go to Step 14.

10

INSPECT PCV VALVE OPERATION

Yes

Go to next step.

No

Replace PCV, then go to Step 21.

11

INSPECT FUEL LINE PRESSURE (LOW FUEL LINE PRESSURE)
  • Is fuel line pressure within 310- 350 kPa {3.1-3.6 kgf/cm 2, 45-51 psi}?

Yes

Go to Step 14.

No

Go to next step.

12

INSPECT FUEL PUMP MAXIMUM PRESSURE
  • Stop engine.

  • Turn ignition key to ON (Engine OFF).

  • Perform fuel pump maximum pressure test.

    » Fuel Pump Maximum Pressure Inspection

  • Is fuel pump maximum pressure within 590-780 kPa {6.0-8.0 kgf/cm 2, 86-110 psi}?

Yes

Go to next step.

No

Inspect fuel pump circuit for open or poor connection.

  • Repair or replace suspected circuit.

  • If circuit is okay, replace fuel pump.

    Then go to Step 21.

13

INSPECT FUEL LINE FROM FUEL PUMP TO FUEL DELIVERYPUMP
  • Visually inspect fuel line for any leakage.

  • Is any fuel leakage found?

Yes

Replace suspected fuel line, then go to Step 21.

No

Inspect fuel filters for following:

  • Restriction or clogging at fuel filter (high-pressure).

  • Foreign material or stain inside fuel filter (low-pressure)

    • If restriction or clogging is found at fuel filter

      (high-pressure), replace fuel filter (high-pressure).

    • If foreign material or stain is found inside fuel filter (low-pressure), clean of fuel tank and fuel filter

      (low-pressure).

    • If all items above are okay, replace pressure regulator. Then, go to Step 21.

14

CHECK IGNITION COIL OPERATION AND HIGH-TENSION LEAD WITH TIMING LIGHT
  • Verify blinking condition on each cylinder using timing light at idle.

  • Do all cylinders show blinking condition?

Yes

Go to Step 18.

No

Go to next step.

15

CHECK HIGH-TENSION LEADS OF NO BLINKING CYLINDER
  • Turn ignition key to OFF.

  • Inspect high-tension leads for installation condition, corrosion on terminal, open lead and damaged cover.

  • Is condition of high-tension lead okay?

Yes

Go to next step.

No

Replace faulty high-tension lead, then go to Step 21.

16

INSPECT POWER SUPPLY TERMINAL AT IGNITION COIL CONNECTOR
  • Disconnect ignition coil connector.

  • Turn ignition key to ON (Engine OFF).

  • Measure voltage between ignition coil connector terminal D (harness‐side) and body ground.

  • Is voltage reading B+?

Yes

Go to next step.

No

Check for open circuit between ignition coil connector and ignition switch.

Repair or replace wiring harness, then go to Step 21.

17

INSPECT IGNITION COIL RESISTANCE

Yes

Go to next step.

No

Replace ignition coil, then go to Step 21.

18

INSPECT ENGINE COMPRESSION

Yes

Go to next step.

No

Implement engine overhaul for repairs, then go to next step.

19

INSPECT FUEL INJECTOR OPERATION

Yes

Go to next step.

No

Replace injector, then go to Step 21.

20

INSPECT SEALING OF ENGINE COOLANT PASSAGE

WARNING:

  • Removing radiator cap when radiator is hot is dangerous. Scalding coolant and steam may shoot out and cause serious injury.

  • When removing radiator cap, wrap a thick cloth around and turn it slowly.

  • Remove radiator cap.

  • Implement procedure to bleed air from engine coolant, then run engine at idle.

  • Is there any small bubble, which makes engine coolant white at filling opening?

    NOTE:

    • Large bubbles are normal since they are remaining air coming out from engine coolant passage.

Yes

Air gets in from poor sealing to head gasket or other areas between combustion chamber and engine coolant passage.

Repair or replace faulty parts, then go to next step.

No

Go to next step.

21

VERIFY TROUBLESHOOTING OF DTC P1170 OR P1173 COMPLETED
  • Make sure to reconnect all disconnected connectors.

  • Turn ignition key to ON (Engine OFF).

  • Clear DTC from memory using NGS tester generic OBD-II function.

  • Start engine.

  • Access ECT and RPM PIDs using NGS.

  • Make sure that ECT PID is above 70° C {158° F}.

  • Increase and keep engine speed above 1,500 rpm for at least 1 minute.

  • Is pending code of same DTC present?

Yes

Replace or reprogram PCM. Then go to next step.

No

Go to next step.

22

VERIFY AFTER REPAIR PROCEDURE

Yes

Go to applicable DTC inspection.

» DTC TABLE [KL]

No

Troubleshooting completed.

 

 

KL) CHECK ENGINE LIGHT COMES ON (CODE P0400)

Applicable Models

ModelStarting S/N Ending S/NModel Spec
Millenia 1996-2002 000001 999999

Related Category/Subcategory/Symptoms

Engine / Fuel System / Serviceability
Engine / Fuel System / Others
Engine / Fuel System / Does Not Turn-Off/Warning Light

MTOL - 2130 Dealer Repair Information

Symptom and Conditions

 

The check engine light comes on but there are no driveability symptoms. A code P0400 is retrieved.

 

1. Inspect EGR passages in the intake manifold for possible carbon obstruction by removing the throttle body.

 

o If carbon is detected, clean ports and tube passages located behind the throttle body, and clean the vacuum lines that lead to the map sensor.

 

o If no carbon is found, proceed to step 2.

 

2. Using the NGS tester, perform an EGR simulation test.

 

o If the engine doesn't stall or idle rough during the simulation test, inspect the EGR hoses, EGR solenoids, and electrical connections for proper installation and operation. Repair as necessary, then re-run the simulation test.

 

o If the engine stalls, record the EGR% and Freeze Frame Data.

 

Note: PCM replacement is for '95 model only according to service bulletin F-013/97 (pages 17-18)

 

.

MIL ON DTC P0455 (GROSS LEAK)

Applicable Models

ModelStarting S/N Ending S/NModel Spec
Millenia 1997-2000 300000 699999

Related Category/Subcategory/Symptoms

Engine / Fuel System / Does Not Turn-Off/Warning Light
Engine / Fuel System / Improper Operation

MTOL - 3499 Dealer Repair Information

Symptom and Conditions

 

MIL ON and DTC P0455 is stored in PCM. Evaporative system (Gross leak).

 

Follow WSM T/S Procedures for DTC P0455. Perform Drive mode 4 and confirm evaporative system has leak or restriction by graphing PID for FTP and CDCV. (Use 1997 (p.a-72) or 2000 (p.3-14) OBD II service high- lights book to see graph of normal system evaporative monitor test)

 

If graph shows restriction (FTP pressure line is slow to return to atmospheric pressure after CDCV valve is opened during monitor) check/blow through vent hoses from fuel tank rollover valves, to pressure valve (if OBVR equipped) to carbon canister, to CDCV solenoid valve,air filter, check valves, and out to atmosphere. Make sure no spider webs/cocoons are present or hoses are not kinked/pinched.

 

If graph shows leakage problem, install evaporative pressure tester check system for leakage under pressure. If leakage is confirmed utilize ultrasonic listening device to locate source of leakage of evaporative system and repair. If no leakage if found under pressure then try putting evaporative system into a vacuum by pinching off vent hose from CDCV valve to atmosphere (using hose clamp pliers or needle- nosed vice grip), the remove hose from purge valve that leads to canister and installing as hand vacuum pump (mighty-vac with vacuum gauge) With Ign. ON and using NGS and monitoring FTP PID, put system into .6 HG of vacuum and monitor PID for 2 minutes. If leak occurs, using needle-nose pliers or hose clamps, start pinching off evaporative hoses in sections and continue monitoring FTP PID until leak stops. Repair leaking hose/component as necessary. Check for leakage at fuel pump gasket and make sure fuel pump mounting ring/nut is tightened securely.

 

Confirm repair by performing drive mode 4. Make sure no DTC is set and DTMR readings (10:21 and 10:22) are within indicated threshold.

 

 

DTC P0455 [KL]



DTC P0455

Evaporative emission control system leak detected (blockage or large leak)

DETECTION CONDITION

  • PCM measures the fuel tank pressure (ftp1), which is the vacuum when a specified period has passed after the tank pressure has reached the preprogrammed target pressure and purge control valve has been closed while monitoring conditions are met. If fuel tank pressure is below threshold, PCM determines that the EVAP system is blocked or has a large leak.

      MONITORING CONDITIONS
    • Target pressure: -2.16 kPa {-16.2 mmHg, -0.638 inHg}

    • PCM monitors EVAP system when driving under following conditions:

      • Remaining fuel: 15-85%

      • IAT at engine start: above -10° C {14° F}

      • ECT at engine start: -10- 32.5° C {14.0- 90.5° F}

      • Atmospheric pressure: above 72.0 kPa {540 mmHg, 21.3 inHg}

      • Vehicle speed: 39- 105 km/h {25- 65mph}

      • Engine speed: 1,000- 3,000 rpm

      • Calculated load: 9- 70%

      • Throttle opening angle: 2.9- 44.0%

      • IAT during monitor: -10- 60° C {14- 140° F}

    Diagnostic support note
  • This is an intermittent monitor (Evaporative leak monitor).

  • MIL illuminates if PCM detects the above malfunction condition in two consecutive drive cycles.

  • DIAGNOSTIC MONITORING TEST RESULTS and PENDING CODE is available if PCM detects the above malfunction condition during first drive cycle.

  • FREEZE FRAME DATA is available.

  • DTC is stored in the PCM memory.

POSSIBLE CAUSE

  • Purge solenoid valve malfunction

  • Canister drain cut valve (CDCV) malfunction

  • Pressure control valve malfunction

  • Loose, missing or defective fuel-filler cap

  • Charcoal canister malfunction

  • Catch tank malfunction

  • Check valve malfunction

  • Rollover valve malfunction

  • Cracked fuel tank

  • Fuel tank component parts are poorly installed.

  • EVAP hose is damaged or loose.

  • Fuel tank pressure sensor malfunction


Diagnostic procedure

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
  • Has FREEZE FRAME DATA been recorded?

Yes

Go to next step.

No

Record FREEZE FRAME DATA on repair order, then go to next step.

2

VERIFY RELATED REPAIR INFORMATION AVAILABILITY
  • Check for related Service Bulletins and/or

    on-line repair information availability.

  • Is any related repair information available?

Yes

Perform repair or diagnosis according to available repair information.

  • If vehicle is not repaired, go to next step.

No

Go to next step.

3

VERIFY RELATED PENDING CODE OR STORED DTCS
  • Turn ignition key to OFF then ON (Engine OFF).

  • Verify related PENDING CODE or stored DTC.

  • Is DTCs P0443 and/or P1449 present?

Yes

Go to appropriate DTC inspection.

No

Go to next step.

4

INSPECT FUEL-FILLER CAP
  • Verify fuel-filler cap is not either disconnected, loose or damaged.

  • Is it okay?

    NOTE:

    • When fuel-filler caps other than OEM caps are attached, it is considered malfunction.

Yes

Go to next step.

No

Retighten fuel-filler cap or replace it if it is damaged.

Then go to Step 31.

5

INSPECT PURGE SOLENOID VALVE STUCK
  • Turn ignition key to ON. (Engine OFF)

  • Simulate PRGV PID for 50% using NGS tester.

  • Is operating sound of purge solenoid valve heard?

Yes

Go to next step.

No

Replace purge solenoid valve, then go to Step 31.

6

INSPECT CDCV STUCK
  • Simulate CDCV PID for ON using NGS tester.

  • Is CDCV operating sound heard?

Yes

Go to next step.

No

Replace CDCV, then go to Step 31.

7

CLASSIFY INTERMITTENT CONCERN OR CONTINUOUS CONCERN
  • Carry out evaporative system test even if it is not test condition.

    » Evaporative System Test

  • Is system test result okay?

Yes

Intermittent concern is existing.

» INTERMITTENT CONCERN TROUBLESHOOTING [KL]

Inspect purge solenoid valve and CDCV circuit.

No

Go to next step.

8

CLASSIFY EVAPORATIVE EMISSION CONTROL SYSTEM FOR LEAKAGE OR BLOCKAGE

NOTE:

  • If evaporative emission tester is not available, go to next step.

Yes

Tester detects leakage.

  • Repair or replace faulty area, then go to Step 31.

No

Go to next step.

9

VERIFY REPAIR SHOP CONDITION
  • Is repair shop possible to perform Drive Mode 4?

Yes

Go to next step.

No

Go to Step 18.

10

VERIFY MONITORING CONDITION FOR DRIVE MODE 4
  • Turn ignition key to ON (Engine OFF).

  • Access BARO, ECT, IAT and FTL PIDs using NGS tester.

    • BARO: 72.0 kPa {540 mmHg, 21.3 inHg} or higher

    • ECT: -10.0- 32.5° C {14.0- 90.5° F}

    • IAT: -10- 60° C {14- 140° F}

    • FTL V: 1.25-3.75 V

  • Is there any PID that is out of specification?

Yes

Take corrective action (e.g. cool down engine), then repeat this step.

NOTE:

  • Readings need to be in the indicated ranges to perform Drive Mode.

No

Go to next step.

11

MONITOR EVAP SYSTEM BY DRIVE MODE 4

Yes

FTP does not change:

  • EVAP monitoring system is inoperative. Go to next step.

FTP changes, but does not reach 2.0 kPa {15 mmHg, 0.59 inHg}:

  • There is a large leak in EVAP system. Go to Step 15.

FTP reaches 2.0 kPa {15 mmHg, 0.59 inHg}, but suddenly goes back:

  • Pressure in fuel tank cannot be reduced and only gas from EVAP line can be drawn.

Inspect following and repair or replace suspected parts.

  • Rollover valve for ventilation resistance.

  • Check valve for in operative or blockage.

  • Air filter for clogging.

  • Then go to Step 31.

No

No leaks were detected in EVAP control system at this time. Go to Step 37.

12

INSPECT PURGE SOLENOID VALVE
  • Turn ignition key to ON (Engine OFF).

  • Connect vacuum pump to purge solenoid valve.

  • Apply vacuum and make sure that vacuum is held.

  • Connect NGS tester and simulate PRGV PID for 50%.

  • Make sure that vacuum is released while simulating.

  • Is it okay?

Yes

Go to next step.

No

Replace purge solenoid valve, then go to Step 31.

13

INSPECT FUEL TANK PRESSURE SENSOR
  • Disconnect hose from fuel tank pressure sensor.

  • Access FTP V PID using NGS tester.

  • Is FTP V PID within 2.25- 2.75 V?

Yes

Go to next step.

No

Replace fuel tank pressure sensor, then go to Step 31.

14

INSPECT FUEL TANK PRESSURE SENSOR
  • Connect vacuum pump to fuel tank pressure sensor.

  • Apply 6.66 kPa {50.0 mmHg, 1.97 inHg} vacuum.

  • Access FTP V PID using NGS tester.

  • Is FTP V PID within 0.45- 0.55 V?

Yes

Go to next step.

No

Replace fuel tank pressure sensor, then go to Step 31.

15

INSPECT CATCH TANK
  • Remove catch tank and inspect for plugging, damages and pinhole using vacuum pump.

  • Is it okay?

Yes

Go to next step.

No

Replace catch tank, then go to Step 31.

16

INSPECT CHARCOAL CANISTER
  • Remove charcoal canister and inspect for damage and pinhole.

  • Is it okay?

Yes

Go to next step.

No

Replace charcoal canister, then go to Step 31.

17

INSPECT CDCV
  • Turn ignition key to ON (Engine OFF).

  • Connect vacuum pump to CDCV.

  • Apply vacuum and make sure that vacuum is released.

  • Simulate CDCV for ON using NGS tester.

  • Make sure that vacuum is held while simulating.

  • Is it okay?

Yes

Inspect and repair or replace for detached incorrectly installed or cracked EVAP system hoses. Then go to Step 31.

No

Replace CDCV, then go to Step 31.

18

INSPECT WHOLE SYSTEM OF EVAP CONTROL SYSTEM
  • Implement "01-03 ENGINE CONTROL SYSTEM OPERATION INSPECTION, Evaporative Emission Control System Inspection Using SST (NGS Tester), Whole system inspection".

    » Whole system inspection

  • Does NGS tester value change under to specified readings and hold for minimum of 2 minutes?

Yes

No leaks were detected in EVAP control system at this time. Go to Step 31.

No

Go to next step.

19

INSPECT FUEL TANK PRESSURE SENSOR
  • Disconnect hose from fuel tank pressure sensor.

  • Access FTP V PID using NGS tester.

  • Is FTP V PID within 2.25- 2.75 V?

Yes

Go to next step.

No

Replace fuel tank pressure sensor, then go to Step 31.

20

INSPECT FUEL TANK PRESSURE SENSOR
  • Connect vacuum pump to fuel tank pressure sensor.

  • Apply 6.67 kPa {50.0 mmHg, 1.97 inHg} vacuum.

  • Access FTP V PID using NGS tester.

  • Is FTP V PID within 0.45- 0.55 V?

Yes

Go to next step.

No

Replace fuel tank pressure sensor, then go to Step 31.

21

INSPECT LEAKAGE FROM CHARCOAL CANISTER TO FUEL TANK
  • Implement "01-03 ENGINE CONTROL SYSTEM OPERATION INSPECTION, Evaporative Emission Control System Inspection Using SST (NGS Tester), Inspection from charcoal canister to fuel tank".

    » Inspection from charcoal canister to fuel tank

  • Does NGS tester value change under to specified readings and hold for minimum of 2 minutes?

Yes

Go to Step 26.

No

Go to next step.

22

INSPECT ATTACHED ACCESSORIES ON FUEL TANK
  • Remove fuel tank and visually inspect for damage, insufficient sealing or poorly attached accessories on fuel tank, such as fuel gauge.

  • Is it okay?

Yes

Go to next step.

No

Repair or replace fuel tank or sealing, then go to Step 31.

23

INSPECT FUEL SHUT-OFF VALVE

Yes

Go to next step.

No

Replace fuel tank, then go to Step 31.

24

INSPECT ROLLOVER VALVE
  • Inspect rollover valve for ventilation.

  • Is it okay?

Yes

Go to next step.

No

Replace fuel tank, then go to Step 31.

25

INSPECT PRESSURE CONTROL VALVE
  • Remove pressure control valve and inspect it.

  • Is it okay?

Yes

Inspect and repair or replace for detached, incorrectly installed or cracked on following hoses:

  • From charcoal canister to pressure control valve

  • From pressure control valve to fuel tank

  • From fuel filler pipe to pressure control valve

  • From FIP sensor to pressure control valve

Then go to Step 31.

No

Replace filler pipe component, then go to Step 31.

26

INSPECT LEAKAGE FROM CHARCOAL CANISTER TO PURGE SOLENOID VALVE
  • Implement "01-03 ENGINE CONTROL SYSTEM OPERATION INSPECTION, Evaporative Emission Control System Inspection Using SST (NGS Tester), Inspection from charcoal canister to purge solenoid valve".

    » Inspection from charcoal canister to purge solenoid valve

  • Does vacuum change under to specified readings and hold for a minimum of 2 minutes?

Yes

Go to Step 31.

No

Go to next step.

27

INSPECT CATCH TANK
  • Remove catch tank and inspect for plugging, damages and pinhole using vacuum pump.

  • Is it okay?

Yes

Go to next step.

No

Replace catch tank, then go to Step 31.

28

INSPECT PURGE SOLENOID VALVE
  • Remove purge solenoid valve and inspect for damage and air leakage.

  • Is it okay?

Yes

Go to next step.

No

Replace purge solenoid valve, then go to Step 31.

29

INSPECT CHARCOAL CANISTER
  • Remove charcoal canister and inspect for plugging, damage and pinhole.

  • Is it okay?

Yes

Go to next step.

No

Replace charcoal canister, then go to Step 31.

30

INSPECT CDCV
  • Turn ignition key to ON (Engine OFF).

  • Connect vacuum pump to CDCV.

  • Apply vacuum and make sure that vacuum is released.

  • Simulate CDCV for ON using NGS tester.

  • Make sure that vacuum is held while simulating.

  • Is it okay?

Yes

Inspect and repair or replace for detached incorrectly installed or cracked hoses from charcoal canister to CDCV. Then go to Step 31.

No

Replace CDCV, then go to Step 31.

31

VERIFY MONITORING CONDITION FOR EVAPORATIVE SYSTEM TEST
  • Reconnect all disconnected connector.

  • Turn ignition key to ON (Engine OFF).

  • Access BARO, ECT, IAT and FTL PIDs using NGS tester.

    • BARO: 72.0 kPa {540 mmHg, 21.3 inHg} or higher

    • ECT: -10.0- 32.5° C {14.0- 90.5° F}

    • IAT: -10-60° C {14- 140° F}

    • FTL V: 1.25-3.75 V

  • Is there any PID that is out of specification?

Yes

Go to next step.

No

Go to Step 34.

32

VERIFY EVAP SYSTEM REPAIRED
  • Carry out evaporative system test even if it is not test condition.

    » Evaporative System Test

  • Is system test result okay?

    NOTE:

    • If DTC appears, ignore those DTC.

Yes

EVAP system repaired.

Go to Step 38.

No

Go to next step.

33

VERIFY MONITORING CONDITION FOR EVAPORATIVE SYSTEM TEST OR DRIVE MODE 4
  • Turn ignition key to ON (Engine OFF).

  • Access BARO, ECT, IAT and FTL PIDs using NGS tester.

    • BARO: 72.0 kPa {540 mmHg, 21.3 inHg} or higher

    • ECT: -10.0- 32.5° C {14.0- 90.5° F}

    • IAT: -10- 60° C {14- 140° F}

    • FTL V: 1.25-3.75 V

  • Verify that fuel gauge reads within 1/4- 3/4 of fuel tank.

  • Is there any PID that is out of specification?

Yes

Take corrective action (e.g. cool down engine), then repeat this step.

NOTE:

  • Readings need to be in the indicated ranges to perform Drive Mode.

No

Go to next step.

34

DECIDE ON AFTER REPAIR PROCEDURE ACCORDING TO REPAIR SHOP CONDITION
  • Clear DTC from memory using NGS tester generic OBD-II function.

  • Is repair shop possible to perform Drive Mode 4?

Yes

Go to Step 36.

No

Go to next step.

35

VERIFY EVAP SYSTEM REPAIRED BY EVAPORATIVE SYSTEM TEST

Yes

EVAP system repaired. Go to Step 38.

No

Replace PCM, then go to Step 38.

36

MONITOR EVAP SYSTEM BY DRIVE MODE 4
  • Run Drive Mode 4.

    » OBD-II DRIVE MODE [KL]

  • Stop vehicle and access ON-BOARD SYSTEM READINESS TESTS menu of GENERIC OBD-II FUNCTIONS to inspect Drive Mode completion status.

  • Has EVAPORATIVE PURGE SYSTEM been monitored?

Yes

Go to next step.

No

Go back to Step 33.

37

VERIFY EVAP SYSTEM REPAIRED

Yes

Go to next step.

No

Replace PCM, then go to next step.

38

VERIFY AFTER REPAIR PROCEDURE

Yes

Go to applicable DTC inspection.

» DTC TABLE [KL]

No

Troubleshooting completed.




 

 

 

 

Drew, Super Mazda Tech.
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