Mazda Protege 5. Manual - part 65

ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (FS)]

01–02B–80

End Of Sie

DTC P0340 [FS]

A3U010201085W05

5

INSPECT PCM CONNECTOR FOR POOR 
CONNECTION

•

Turn ignition key to OFF.

•

Disconnect PCM connector.

•

Check for poor connection at terminals 21 and 
22 (damaged,/pulled-out terminals, corrosion, 
etc.).

•

Is there malfunction?

Yes Repair terminal, then go to Step 9.

No

Go to next step.

6

INSPECT CKP CIRCUIT FOR OPEN CIRCUIT

•

Check for continuity between following circuits:
— CKP sensor terminal A and PCM terminal 

21 (harness-side)

— CKP sensor terminal B and PCM terminal 

22 (harness-side)

•

Is there continuity?

Yes Go to next step.

No

Repair or replace suspected harness, then go to Step 9.

7

INSPECT CKP CIRCUIT FOR SHORT TO 
GROUND

•

Check for continuity between following terminal 
and body ground:
— CKP sensor terminal A (harness-side)
— CKP sensor terminal B (harness-side)

•

Is there continuity?

Yes Repair or replace suspected harness, then go to Step 9.

No

Go to next step.

8

INSPECT CKP CIRCUITS FOR INTERMEDIATE 
SHORT

•

Check for continuity between CKP sensor 
terminals A and B.

•

Is there continuity?

Yes Repair or replace suspected harness, then go to next step.

No

Go to next step.

9

VERIFY TROUBLESHOOTING OF DTC P0335 
COMPLETED

•

Make sure to reconnect all disconnected 
connectors.

•

Turn ignition key to ON (Engine OFF).

•

Clear DTC from PCM memory using WDS or 
equivalent.

•

Start engine.

•

Access MAF PID using WDS or equivalent.

Note

•

MAF PID should indicate above 2.2 g/s 
{0.29 lb./min} during this test.

•

Is same DTC present?

Yes Replace PCM, then go to next step.

No

Go to next step.

10

VERIFY AFTER REPAIR PROCEDURE

•

Perform “After Repair Procedure”.
(See 01–02B–9 AFTER REPAIR 
PROCEDURE [FS].)

•

Is there any DTC present?

Yes Go to applicable DTC inspection.

(See 01–02B–15 DTC TABLE [FS].)

No

Troubleshooting completed.

STEP

INSPECTION

ACTION

DTC P0340

CMP sensor circuit malfunction

DETECTION 

CONDITION

•

PCM monitors input voltage from CMP sensor while MAF is above 2.2 g/s {0.29 ib/min}. if PCM does not 
receive pulse signal the proper pulse signal timing basis on the CKP sensor signal, determines that CMP 
circuit has malfunction.

Diagnostic support note

•

This is a continuous monitor (CCM).

•

MIL illuminates if PCM detects the above malfunction conditions during first drive cycle. Therefore, 
PENDING CODE is not available.

•

FREEZE FRAME DATA is available.

•

DTC is stored in PCM memory.

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ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (FS)]

01–02B–81

01–02B

Diagnostic procedure

POSSIBLE 

CAUSE

•

CMP sensor malfunction

•

Connector or terminal malfunction

•

CMP sensor is dirty.

•

Short to ground between CMP sensor terminal A and PCM terminal 85

•

Short to ground between CMP sensor terminal B and PCM terminal 86

•

Open circuit between CMP sensor terminal A and PCM terminal 85

•

Open circuit between CMP sensor terminal B and PCM terminal 86

•

CKP sensor pulse wheel malfunction

DTC P0340

CMP sensor circuit malfunction

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 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 CMP SENSOR VOLTAGE

•

Disconnect CMP sensor.

•

Connect voltmeter between CMP sensor 
terminals A and B (part-side).

•

Check voltage in AC range while cranking the 
engine.

•

Is any voltage reading?

Yes Go to Step 5.

No

Go to next step.

4

CHECK CMP SENSOR RESISTANCE

•

Check resistance between CMP sensor 
terminals A and B (part-side).

•

Is resistance within 0.95—1.25 kilohms?

Yes Check for poor connection (damaged/pulled-out terminals, 

corrosion, etc.), bent terminal of CMP sensor connector or 
plate.

•

Repair if necessary, then go to Step 10.

No

Replace CMP sensor, then go to Step 10.

5

INSPECT PCM CONNECTOR FOR POOR 
CONNECTION

•

Turn ignition key to OFF.

•

Disconnect PCM connector.

•

Check for poor connection at terminals 85 and 
86 (damaged,/pulled-out terminals, corrosion, 
etc.).

•

Is there any malfunction?

Yes Repair terminal, then go to Step 10.

No

Go to next step.

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ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (FS)]

01–02B–82

End Of Sie

DTC P0401 [FS]

A3U010201086W01

6

INSPECT CMP CIRCUIT FOR OPEN CIRCUIT

•

Check for continuity between following circuits:
— CMP sensor terminal A and PCM terminal 

85 (harness-side)

— CMP sensor terminal B and PCM terminal 

86 (harness-side)

•

Is there continuity?

Yes Go to next step.

No

Repair or replace suspected harness, then go to Step 10.

7

INSPECT CMP CIRCUIT FOR SHORT TO 
GROUND

•

Check for continuity between following terminal 
and body ground:
— CMP sensor terminal A (harness-side)
— CMP sensor terminal B (harness-side)

•

Is there continuity?

Yes Repair or replace suspected harness, then go to Step 10.

No

Go to next step.

8

INSPECT CMP CIRCUITS FOR INTERMEDIATE 
SHORT

•

Check for continuity between CMP sensor 
terminals A and B (harness-side).

•

Is there continuity?

Yes Repair or replace suspected harness, then go to next step.

No

Go to next step.

9

INSPECT CKP SENSOR

•

Check CKP sensor.
(See 01–40B–32 CRANKSHAFT POSITION 
(CKP) SENSOR INSPECTION [FS].)

•

Is CKP sensor okay?

Yes Go to next step.

No

Replace CKP sensor, then go to next step.

10

VERIFY TROUBLESHOOTING OF DTC P0340 
COMPLETED

•

Make sure to reconnect all disconnected 
connectors.

•

Turn ignition key to ON (Engine OFF).

•

Clear DTC from PCM memory using WDS or 
equivalent.

•

Start engine.

•

Access MAF PID using WDS or equivalent.

Note

•

MAF PID should indicate above 2.2 g/s 
{0.29 lb./min} during this test.

•

Is same DTC present?

Yes Replace PCM, then go to next step.

No

Go to next step.

11

VERIFY AFTER REPAIR PROCEDURE

•

Perform “After Repair Procedure”.
(See 01–02B–9 AFTER REPAIR 
PROCEDURE [FS].)

•

Is there any DTC present?

Yes Go to applicable DTC inspection.

(See 01–02B–15 DTC TABLE [FS].)

No

Troubleshooting completed.

STEP

INSPECTION

ACTION

DTC P0401

EGR flow insufficient detected

DETECTION 

CONDITION

•

Difference in intake manifold pressures when EGR is operated and when it is stopped is too small.

Diagnostic support note

•

This is an intermittent monitor (EGR).

•

MIL illuminates if PCM detects the above malfunction conditions 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 PCM memory.

POSSIBLE 

CAUSE

•

EGR valve malfunction

•

EGR boost sensor malfunction

•

EGR boost sensor solenoid valve malfunction

•

EGR gasket malfunction

•

PCM malfunction

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ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (FS)]

01–02B–83

01–02B

Diagnostic procedure

End Of Sie

DTC P0402 [FS]

A3U010201086W02

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 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

INSPECT FOR OTHER DTCS

•

Turn ignition key to OFF then start engine.

•

Have other DTCs been stored?

Yes Go to applicable DTC troubleshooting.

No

Go to next step.

4

INSPECT VACUUM HOSE CONDITION

•

Inspect vacuum hoses for clogging, any 
damages, freeze, or vacuum leakage.

•

Is there malfunction?

Yes Replace vacuum hoses, then go to Step 9.

No

Go to next step.

5

INSPECT EGR VALVE MALFUNCTION

•

Inspect EGR valve.
(See 01–16–15 EGR VALVE INSPECTION.)

•

Is EGR valve okay?

Yes Go to next step.

No

Replace EGR valve, then go to Step 9.

6

INSPECT EGR BOOST SENSOR 
MALFUNCTION

•

Inspect EGR boost sensor.
(See 01–40B–39 EGR BOOST SENSOR 
INSPECTION [FS].)

•

Is EGR boost sensor okay?

Yes Go to next step.

No

Replace EGR boost sensor, then go to Step 9.

7

INSPECT EGR BOOST SENSOR SOLENOID 
VALVE

•

Inspect EGR boost sensor solenoid valve.
(See 01–16–17 EGR BOOST SENSOR 
SOLENOID VALVE INSPECTION.)

•

Is EGR boost sensor solenoid valve okay?

Yes Go to next step.

No

Replace EGR boost sensor solenoid valve, then go to Step 
9.

8

INSPECT EGR VALVE PASSAGE

•

Remove EGR valve.

•

Is gasket installation normal?

Yes Go to next step.

No

Install gasket correctly, then go to next step.

9

MONITOR EGR SYSTEM BY DRIVE MODE

•

Make sure to reconnect all disconnected 
connectors.

•

Run OBD-II Drive Mode 1 and 2.
(See 01–02B–10 OBD-II DRIVE MODE [FS].)

•

Check EGR System Monitor completion status 
using On-Board Readiness Test function.

•

Has EGR system been monitored?

Yes Go to next step.

No

Retry this step.

10

VERIFY TROUBLESHOOTING OF DTC P0401 
COMPLETED

•

Access DIAGNOSTIC MONITORING TEST 
RESULTS.

•

Verify TEST ID 10:41:00 value.

•

Is value within specification?

Yes Go to next step.

No

Replace PCM, then go to next step.

11

VERIFY AFTER REPAIR PROCEDURE

•

Perform “After Repair Procedure”.
(See 01–02B–9 AFTER REPAIR 
PROCEDURE [FS].)

•

Is there any DTC present?

Yes Go to applicable DTC inspection.

(See 01–02B–15 DTC TABLE [FS].)

No

Troubleshooting completed.

DTC P0402

EGR flow excessive detected

DETECTION 

CONDITION

•

Difference in intake manifold pressures when EGR is operated and when it is stopped is too large.

Diagnostic support note

•

This is an intermittent monitor (EGR).

•

MIL illuminates if PCM detects the above malfunction conditions 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.

1712-1U-01G(01-02B).fm  83 ページ  ２００１年６月２９日 金曜日 午後３時２４分