Mazda Protege 5. Manual - part 80

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

01–02B–140

End Of Sie

4

INSPECT EGR VALVE FOR POOR 
CONNECTION

•

Turn ignition key to OFF.

•

Disconnect EGR valve connector.

•

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

•

Is there malfunction?

Yes Repair or replace terminals, then go to Step 11.

No

Go to next step.

5

INSPECT POWER CIRCUIT FOR OPEN 
CIRCUIT

•

Turn ignition key to ON (Engine OFF).

•

Measure voltage between EGR valve terminal 
D (harness-side) and body ground.

•

Is voltage B+?

Yes Inspect EGR valve coils 3 and 4.

(See 01–16–15 EGR VALVE INSPECTION.)

•

If there is a malfunction, replace EGR valve, and then 
go to Step 11.

•

If there is no malfunction, go to Step 11.

No

Repair or replace harness for open circuit, then go to Step 
11.

6

INSPECT EGR VALVE FOR POOR 
CONNECTION

•

Turn ignition key to OFF.

•

Disconnect EGR valve connector.

•

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

•

Is there malfunction?

Yes Repair or replace terminals, then go to Step 11.

No

Go to next step.

7

INSPECT EGR VALVE

•

Measure resistance between EGR valve 
terminals D and B (part-side).

•

Is resistance within 20—24 ohms?

Yes Go to next step.

No

Replace EGR valve, then go to Step 11.

8

INSPECT PCM CONNECTOR FOR POOR 
CONNECTION

•

Disconnect PCM connector.

•

Check for poor connection at terminal 46 
(damaged/pulled-out terminals, corrosion, 
etc.).

•

Is there malfunction?

Yes Repair terminals, then go to Step 11.

No

Go to next step.

9

INSPECT CONTROL CIRCUIT FOR SHORT

•

Check continuity between EGR valve terminal 
B (harness-side) and body ground.

•

Is there continuity?

Yes Repair or replace harness for short to ground, then go to 

Step 11.

No

Measure voltage between EGR valve terminal B and body 
ground.

•

If voltage is B+, repair or replace harness for short to 
power, then go to next step.

•

If voltage is approx. 0 V, go to next step.

10

INSPECT CONTROL CIRCUIT FOR OPEN 
CIRCUIT

•

Connect breakout box with PCM disconnected.

•

Check for continuity between EGR valve 
terminal B (harness-side) and breakout box 
terminal 46.

•

Is there continuity?

Yes Go to next step.

No

Repair or replace harness for open, then go to next step.

11

VERIFY TROUBLESHOOTING OF DTC P1498 
COMPLETED

•

Make sure to reconnect all disconnected 
connectors.

•

Turn ignition key to OFF, then ON (Engine 
OFF).

•

Is same DTC present?

Yes Replace PCM, then go to next step.

No

Go to next step.

12

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

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

01–02B–141

01–02B

DTC P1499 [FS]

A3U010201083W08

Diagnostic procedure

DTC P1499

EGR valve stepping motor coil 4 open or short circuit

DETECTION 

CONDITION

•

PCM monitors input voltages from EGR valve coil control circuit just after turning ignition key to ON. If 
voltage at PCM terminal 56 remains low or high, PCM determines that EGR valve circuit has malfunction.

Diagnostic support note

•

This is a diagnostic support DTC (monitored once per key cycle).

•

MIL does not illuminate.

•

FREEZE FRAME DATA is not available.

•

DTC is not stored in PCM memory.

POSSIBLE 

CAUSE

•

EGR valve malfunction

•

Connector or terminal malfunction

•

Short to ground circuit in wiring between EGR valve terminal F and PCM terminal 56

•

Open circuit in wiring between EGR valve terminal F and PCM terminal 56

•

Short to power circuit in wiring between EGR valve terminal F and PCM terminal 56

•

Open circuit in wiring between main relay terminal D and EGR valve terminal D

•

PCM malfunction

STEP

INSPECTION

ACTION

1

VERIFY RELATED REPAIR INFORMATION 
AVAILABILITY

•

Check for related Service Bulletins availability.

•

Is any 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.

2

CLASSIFY INTERMITTENT CONCERN OR 
CONTINUOUS CONCERN

•

Turn ignition key to OFF then ON (Engine 
OFF).

•

Is same DTC present?

Yes Go to next step.

No

Refer to intermittent concern.
(See 01–03B–4 INTERMITTENT CONCERN 
TROUBLESHOOTING [FS].)

3

CLASSIFY POWER CIRCUIT OR CONTROL 
CIRCUIT MALFUNCTION

•

Are same DTC and P1498 present?

Yes Malfunction at EGR valve or power circuit.

Go to next step.

No

Malfunction at EGR valve or control circuit.
Go to Step 6.

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

01–02B–142

End Of Sie

4

INSPECT EGR VALVE FOR POOR 
CONNECTION

•

Turn ignition key to OFF.

•

Disconnect EGR valve connector.

•

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

•

Is there malfunction?

Yes Repair or replace terminals, then go to Step 11.

No

Go to next step.

5

INSPECT POWER CIRCUIT FOR OPEN 
CIRCUIT

•

Turn ignition key to ON (Engine OFF).

•

Measure voltage between EGR valve terminal 
D (harness-side) and body ground.

•

Is voltage B+?

Yes Inspect EGR valve coils 3 and 4.

(See 01–16–15 EGR VALVE INSPECTION.)

•

If there is a malfunction, replace EGR valve, and then 
go to Step 11.

•

If there is no malfunction, go to Step 11.

No

Repair or replace harness for open circuit, then go to Step 
11.

6

INSPECT EGR VALVE FOR POOR 
CONNECTION

•

Turn ignition key to OFF.

•

Disconnect EGR valve connector.

•

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

•

Is there malfunction?

Yes Repair or replace terminals, then go to Step 11.

No

Go to next step.

7

INSPECT EGR VALVE

•

Measure resistance between EGR valve 
terminal D and F (part-side).

•

Is resistance within 20—24 ohms?

Yes Go to next step.

No

Replace EGR valve, then go to Step 11.

8

INSPECT PCM CONNECTOR FOR POOR 
CONNECTION

•

Disconnect PCM connector.

•

Check for poor connection at terminal 56 
(damaged/pulled-out terminals, corrosion, 
etc.).

•

Is there malfunction?

Yes Repair terminal, then go to Step 11.

No

Go to next step.

9

INSPECT CONTROL CIRCUIT FOR SHORT

•

Check for continuity between EGR valve 
terminal F (harness-side) and body ground.

•

Is there continuity?

Yes Repair or replace harness for short to ground, then go to 

Step 11.

No

Measure voltage between EGR valve terminal F and body 
ground.

•

If voltage is B+, repair or replace harness for short to 
power, then go to next step.

•

If voltage is approx. 0 V, go to next step.

10

INSPECT CONTROL CIRCUIT FOR OPEN 
CIRCUIT

•

Connect breakout box with PCM disconnected.

•

Check for continuity between EGR valve 
terminal F (harness-side) and breakout box 
terminal 56.

•

Is there continuity?

Yes Go to next step.

No

Repair or replace harness for open, then go to next step.

11

VERIFY TROUBLESHOOTING OF DTC P1499 
COMPLETED

•

Make sure to reconnect all disconnected 
connectors.

•

Turn ignition key to OFF, then ON (Engine 
OFF).

•

Is same DTC present?

Yes Replace PCM, then go to next step.

No

Go to next step.

12

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

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

01–02B–143

01–02B

DTC P1512 [FS]

A3U010201083W09

Diagnostic procedure

DTC P1512

Variable tumble control system (VTCS) shutter valve stuck closed

DETECTION 

CONDITION

•

PCM monitors air flow amount is above 45.2 g/s {6.0 lb/min} when the following monitoring conditions are 
met. PCM determines that VTCS shutter valve has closed stuck malfunction.

MONITORING CONDITIONS

— Engine speed is above 3,000 rpm.
— Engine coolant temperature is above 70 

°°°°

C {158 

°°°°

F}.

— Throttle valve opening angle is above 75%.

Diagnostic support note

•

This is a continuous monitor (CCM).

•

MIL illuminates if PCM detects the above 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

•

ECT sensor malfunction

•

MAF sensor malfunction

•

IAT sensor malfunction

•

EGR boost sensor malfunction

•

TP sensor malfunction

•

CKP sensor malfunction

•

VTCS solenoid valve malfunction

•

VTCS shutter valve malfunction (stuck closed)

•

VTCS shutter valve actuator malfunction (stuck closed).

•

Short to ground circuit between VTCS solenoid valve terminal B and PCM terminal 73

•

Short to power circuit between VTCS solenoid valve terminal B and PCM terminal 73

•

PCM malfunction

STEP

INSPECTION

ACTION

1

CHECK 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

CHECK 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.

1712-1U-01G(01-02B).fm  143 ページ  ２００１年６月２９日 金曜日 午後３時２４分