Mazda CX 7. Manual — part 69

ON-BOARD DIAGNOSTIC [L3 WITH TC]

01-02–231

01-02

End Of Sie

DTC P2196[L3 WITH TC]

id010239812800

15

INSPECT FUEL PRESSURE (LOW-SIDE)

• Connect the fuel pressure gauge between fuel

pump and high pressure fuel pump.
(See01-14-19 HIGH PRESSURE FUEL
PUMP INSPECTION[L3 WITH TC].)

• Measure the low side fuel pressure.

(See01-14-5 FUEL LINE PRESSURE
INSPECTION[L3 WITH TC].)

• Is the low side fuel pressure within the

specified?

Yes

Go to the next step.

No

Inspect for following:

• Fuel line restriction

• Fuel filter clogging

If okay replace the fuel pump. Then go to the next step.

16

VERIFY TROUBLESHOOTING OF DTC P2195
COMPLETED

• Make sure to reconnect all disconnected

connectors.

• Clear the DTC from the PCM memory using

the M-MDS.

• Perform the PCM Adopted Memory Produce

Drive Mode and HO2S heater, and TWC
Repair Verification Drive Mode.
(See01-02-10 OBD-II DRIVE MODE[L3 WITH
TC].)

• Is the PENDING CODE for this DTC present?

Yes

Replace the PCM, then go to the next step.
(See01-40-6 PCM REMOVAL/INSTALLATION[L3 WITH
TC].)

No

Go to the next step.

17

VERIFY AFTER REPAIR PROCEDURE

• Perform the “AFTER REPAIR PROCEDURE”.

(See01-14-4 AFTER REPAIR
PROCEDURE[L3 WITH TC].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.
(See01-02-13 DTC TABLE[L3 WITH TC].)

No

Troubleshooting completed.

STEP

INSPECTION

ACTION

DTC P2196

Front HO2S signal stuck rich

DETECTION

CONDITION

• The PCM monitors the front HO2S output current when the following conditions are met. If the average

output current is less than 0.85 A for 25 s, the PCM determines that the front HO2S has a malfunction.

MONITORING CONDITION

— ECT: more than 70— 150

°C {158— 302 °F}

— Engine speed: 1,000— 3,200 rpm

— Charging efficiency: 20— 62.5%

— Output voltage from the rear HO2S: 0.8 V or less

Diagnostic support note

• This is an intermittent monitor (HO2S).

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

one drive cycle while the DTC for the same malfunction has been stored in the PCM.

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

cycle.

• FREEZE FRAME DATA is available.

• DTCs are stored in the PCM memory.

POSSIBLE

CAUSE

• Front HO2S malfunction

• Fuel injector malfunction

• Excessive fuel pressure

• Fuel pressure sensor malfunction

• Relief valve (built-in fuel delivery pipe) malfunction

• Spill valve control solenoid valve (built-in high pressure fuel pump) malfunction

• High pressure fuel pump malfunction

• Restriction in intake-air system

• MAF sensor malfunction

• ECT sensor malfunction

• PCM malfunction

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ON-BOARD DIAGNOSTIC [L3 WITH TC]

01-02–232

Diagnostic procedure

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA AND
DIAGNOSTIC MONITORING TEST RESULTS
HAVE BEEN RECORDED

• Have the FREEZE FRAME DATA and

DIAGNOSTIC MONITORING TEST RESULTS
(HO2S related) been recorded?

Yes

Go to the next step.

No

Record the FREEZE FRAME DATA and DIAGNOSTIC
MONITORING TEST RESULTS on the repair order, then
go to the next step.

2

VERIFY RELATED REPAIR INFORMATION
AVAILABILITY

• Verify related Service Bulletins and/or on-line

repair information availability.

• Is any related repair information available?

Yes

Perform the repair or diagnosis according to the available
repair information.

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

No

Go to the next step.

3

VERIFY RELATED PENDING CODE OR
STORED DTC

• Turn the ignition switch to off, then ON position

(Engine off).

• Verify the related PENDING CODE or stored

DTCs.

• Is the DTC P2177 or P2187 also present?

Yes

Go to the appropriate DTC inspection.
(See01-02-13 DTC TABLE[L3 WITH TC].)

No

Go to the next step.

4

IDENTIFY TRIGGER DTC FOR FREEZE FRAME
DATA

• Is DTC P2196 on FREEZE FRAME DATA?

Yes

Go to the next step.

No

Go to FREEZE FRAME DATA DTC inspection.
(See01-02-13 DTC TABLE[L3 WITH TC].)

5

VERIFY CURRENT INPUT SIGNAL STATUS

• Connect the M-MDS to the DLC-2.

• Verify the following PIDs.

(See01-40-6 PCM INSPECTION[L3 WITH
TC].)

— APP1

— APP2

— ECT

— MAF

— TP

— VSS

• Are the PIDs normal?

Yes

Go to the next step.

No

Inspect the malfunctioning part according to the inspection
results.
Then go to Step 15.

6

VERIFY CURRENT INPUT SIGNAL STATUS
UNDER FREEZE FRAME DATA CONDITION

• Connect the M-MDS to the DLC-2.

• Verify the following PIDs under the FREEZE

FRAME DATA condition.
— APP1

— APP2

— ECT

— MAF

— TP

— VSS

• Are the PIDs normal?

Yes

Go to the next step.

No

Inspect the malfunctioning part according to the inspection
results.
Then go to Step 15.

7

VERIFY CURRENT INPUT SIGNAL STATUS OF
MAF SENSOR

• Connect the M-MDS to the DLC-2.

• Start the engine.

• Access the MAF PID.

• Verify that the MAF PID changes quickly

according to engine speed.

• Is the PID normal?

Yes

Go to the next step.

No

Replace the MAF/IAT sensor, then go to Step 15.

8

INSPECT FRONT HO2S

• Inspect the front HO2S.

(See01-40-37 HEATED OXYGEN SENSOR
(HO2S) INSPECTION[L3 WITH TC].)

• Is there any malfunction?

Yes

Replace the front HO2S, then go to Step 15.
(See01-15-2 EXHAUST SYSTEM REMOVAL/
INSTALLATION[L3 WITH TC].)

No

Go to the next step.

9

INSPECT FUEL INJECTOR

• Inspect the fuel injector.

(See01-14-27 FUEL INJECTOR
INSPECTION[L3 WITH TC].)

• Is there any malfunction?

Yes

Replace the suspected fuel injector, then go to Step 15.
(See01-14-23 FUEL INJECTOR REMOVAL/
INSTALLATION[L3 WITH TC].)

No

Go to the next step.

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ON-BOARD DIAGNOSTIC [L3 WITH TC]

01-02–233

01-02

End Of Sie

WM: DTC P22XX

DTC P2228[L3 WITH TC]

id010239812900

10

INSPECT FUEL PRESSURE (HIGH-SIDE)

• Access and monitor FRP PID.

• Is the FRP PID value within the specified?

(See01-40-6 PCM INSPECTION[L3 WITH
TC].)

Yes

Go to Step 14.

No

Go to the next step.

11

IDENTIFY CAUSE BY FUEL PRESSURE
SENSOR OR HIGH PRESSURE FUEL PUMP

• Is the vehicle accelerate performance

normally?

Yes

Go to the next step.

No

Go to Step 16.

12

INSPECT FUEL PRESSURE SENSOR

• Inspect the fuel pressure sensor.

(See01-40-35 FUEL PRESSURE SENSOR
INSPECTION[L3 WITH TC].)

• Is the fuel pressure sensor normal?

Yes

Go to Step 14.

No

Replace the fuel delivery pipe, then go to Step 15.

13

INSPECT HIGH PRESSURE FUEL PUMP

• Replace the high pressure fuel pump

• Monitor FUEL_PRES PID

• Is the FUEL_PRES PID value within the

specified?

(See01-40-6 PCM INSPECTION[L3 WITH TC].)

Yes

Go to Step 15.

No

Go to the next step.

14

INSPECT FUEL PRESSURE (LOW-SIDE)

• Connect the fuel pressure gauge between fuel

pump and high pressure fuel pump.

• Measure the low side fuel pressure.

(See01-14-5 FUEL LINE PRESSURE
INSPECTION[L3 WITH TC].)

• Is the low side fuel pressure within the

specified?

Yes

Go to the next step.

No

Inspect for following:

• Fuel line restriction

• Fuel filter clogging

If okay replace the fuel pump. Then go to the next step.

15

VERIFY TROUBLESHOOTING OF DTC P2196
COMPLETED

• Make sure to reconnect all disconnected

connectors.

• Clear the DTC from the PCM memory using

the M-MDS.

• Perform the PCM Adopted Memory Produce

Drive Mode and HO2S heater, and TWC
Repair Verification Drive Mode.
(See01-02-10 OBD-II DRIVE MODE[L3 WITH
TC].)

• Is the PENDING CODE for this DTC present?

Yes

Replace the PCM, then go to the next step.
(See01-40-6 PCM REMOVAL/INSTALLATION[L3 WITH
TC].)

No

Go to the next step.

16

VERIFY AFTER REPAIR PROCEDURE

• Perform the “AFTER REPAIR PROCEDURE”.

(See01-14-4 AFTER REPAIR
PROCEDURE[L3 WITH TC].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.
(See01-02-13 DTC TABLE[L3 WITH TC].)

No

Troubleshooting completed.

STEP

INSPECTION

ACTION

DTC P2228

BARO sensor circuit low input

DETECTION

CONDITION

• PCM monitors the input voltage from the BARO sensor. If the input voltage at the PCM is below 1.95 V, the

PCM determines that the BARO sensor circuit has a malfunction.

Diagnostic support note

• This is a continuous monitor (CCM).

• MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.

• FREEZE FRAME DATA is available.

• DTCs are stored in the PCM memory.

POSSIBLE

CAUSE

• BARO sensor malfunction

• PCM malfunction

1871-1U-06B(01-02).fm 233 ページ ２００６年３月１５日 水曜日 午前１０時３２分

ON-BOARD DIAGNOSTIC [L3 WITH TC]

01-02–234

Diagnostic procedure

End Of Sie

DTC P2229[L3 WITH TC]

id010239813000

Diagnostic procedure

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED

• Has the FREEZE FRAME DATA been

recorded?

Yes

Go to the next step.

No

Record FREEZE FRAME DATA on the repair order, then go
to the 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 the repair or diagnosis according to the available
repair information.

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

No

Go to the next step.

3

INSPECT BARO SENSOR MALFUNCTION

• Start the engine.

• Access the BARO PID using the M-MDS.

• Inspect that the BARO PID is within the

specification.

• Is there any malfunction?

Yes

Replace the PCM, then go to the next step.

No

Go to the next step.

4

VERIFY TROUBLESHOOTING OF DTC P2228
COMPLETED

• Make sure to reconnect all disconnected

connectors.

• Turn the ignition switch to the ON position

(Engine off).

• Clear the DTC from the memory using the M-

MDS.

• Start the engine and warm it up completely.

• Is the same DTC present?

Yes

Replace the PCM, then go to the next step.
(See01-40-6 PCM REMOVAL/INSTALLATION[L3 WITH
TC].)

No

No concern is detected. Go to the next step.

5

VERIFY AFTER REPAIR PROCEDURE

• Perform the “After Repair Procedure”.

(See01-14-4 AFTER REPAIR
PROCEDURE[L3 WITH TC].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.
(See01-02-13 DTC TABLE[L3 WITH TC].)

No

Troubleshooting completed.

DTC P2229

BARO sensor circuit high input

DETECTION

CONDITION

• PCM monitors the input voltage from the BARO sensor. If the input voltage at the PCM is above 4.45 V, the

PCM determines that the BARO sensor circuit has a malfunction.

Diagnostic support note

• This is a continuous monitor (CCM).

• MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.

• FREEZE FRAME DATA is available.

• DTCs are stored in the PCM memory.

POSSIBLE

CAUSE

• BARO sensor malfunction

• PCM malfunction

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED

• Has the FREEZE FRAME DATA been

recorded?

Yes

Go to the next step.

No

Record FREEZE FRAME DATA on the repair order, then go
to the 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 the repair or diagnosis according to the available
repair information.

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

No

Go to the next step.

3

INSPECT BARO SENSOR MALFUNCTION

• Start the engine.

• Access the BARO PID using the M-MDS.

• Inspect that the BARO PID is within the

specification.

• Is there any malfunction?

Yes

Replace the PCM, then go to the next step.

No

Go to the next step.

1871-1U-06B(01-02).fm 234 ページ ２００６年３月１５日 水曜日 午前１０時３２分