Mazda Protege 5. Manual — part 71

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

01–02B–104

End Of Sie

DTC P0461 [FS]

A3U010201086W11

Diagnostic procedure

End Of Sie

12

VERIFY TROUBLESHOOTING OF DTC P0456
COMPLETED

•

Clear DTC using NGS tester generic OBD-II
function.

•

Run engine at 3.500 rpm for 3 minutes, then
run at idle for 6 minutes.

•

Access DIAGNOSTIC MONITORING TEST
RESULTS.

•

Verify TEST ID 10:23:00 value.

•

Does it indicate 0 or 65535.

Yes Monitoring was not implemented. Repeat Step 10.

No

Go to next step.

13

VERIFY P0456 MONITOR RESULT

•

Is below MAX value?

Yes Go to next step.

No

Replace PCM, then go to next step.

14

VERIFY AFTER REPAIR PROCEDURE

•

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

•

Is there any DTC present?

Yes Go to appropriate DTC inspection.

(See 01–02B–15 DTC TABLE [FS].)

No

Troubleshooting completed.

STEP

INSPECTION

ACTION

DTC P0461

Fuel gauge sender unit circuit range/performance

DETECTION

CONDITION

•

PCM monitors fuel gauge sender unit input voltage difference before and after PCM-calculated fuel
consumption has reached 19.3 liters {20.4 US qt., 17.0 Imp qt.}. If fuel gauge sender unit operation
reflects 5% less than PCM-calculated fuel consumption, PCM determines that fuel gauge sender unit
range/performance is in error.

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

•

Fuel gauge sender unit malfunction or substandard performance

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 FUEL GAUGE SENDER UNIT

•

Turn ignition key to OFF.

•

Inspect fuel gauge sender unit.
(See 09–22–13 FUEL GAUGE SENDER UNIT
INSPECTION.)

•

Is fuel gauge sender unit okay?

Yes Replace PCM, then go to next step.

No

Repair or replace fuel gauge sender unit, then go to next
step.

4

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.

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

01–02B–105

01–02B

DTC P0462 [FS]

A3U010201086W12

Diagnostic procedure

DTC P0462

Fuel gauge sender unit circuit low input

DETECTION

CONDITION

•

PCM monitors the voltage of fuel gauge sender unit. If PCM detects PCM terminal 63 voltage below 0.08 V
for 5 seconds, PCM determines that fuel gauge sender unit circuit has a malfunction.

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

•

Fuel gauge sender unit malfunction

•

Short to ground circuit between fuel gauge sender unit terminal A and PCM terminal 63

•

Short circuit between fuel level signal circuit and fuel gauge sender unit ground circuit

•

PCM malfunction

•

Bent terminals of fuel gauge sender unit

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 TERMINAL FOR BENT

•

Turn ignition key to OFF.

•

Disconnect fuel gauge sender unit connector.

•

Check for bent terminal.

•

Is there malfunction?

Yes Repair suspected terminal, then go to Step 6.

No

Go to next step.

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

01–02B–106

End Of Sie

4

INSPECT FUEL LEVEL SIGNAL CIRCUIT FOR
SHORT TO GROUND

•

Turn ignition key to OFF.

•

Disconnect PCM connector.

•

Check for continuity between fuel gauge
sender unit terminal A (harness-side) and body
GND.

•

Is there continuity?

Yes Repair or replace suspected harness, then go to Step 6.

No

Go to next step.

5

INSPECT FUEL GAUGE SENDER UNIT
CIRCUITS FOR SHORTS

•

Check for continuity between fuel gauge
sender unit terminals A and C (harness-side).

•

Is there continuity?

Yes Repair or replace suspected harness, then go to Step 6.

No

Go to next step.

6

VERIFY TROUBLESHOOTING OF DTC P0462
COMPLETED

•

Make sure to reconnect all disconnected
connectors.

•

Turn ignition key to ON (Engine OFF).

•

Clear DTC from memory using WDS or
equivalent.

•

Start engine.

•

Is pending code of same DTC present?

Yes Replace PCM, then go to next step.

No

Go to next step.

7

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

1712-1U-01G(01-02B).fm 106 ページ ２００１年６月２９日 金曜日 午後３時２４分

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

01–02B–107

01–02B

DTC P0463 [FS]

A3U010201086W13

Diagnostic procedure

DTC P0463

Fuel gauge sender unit circuit high input

DETECTION

CONDITION

•

PCM monitors the voltage of fuel gauge sender unit. If PCM detects PCM terminal 63 voltage above 4.92
V for 5 seconds, PCM determines that fuel gauge sender unit circuit has a malfunction.

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

•

Fuel gauge sender unit malfunction

•

Open circuit between fuel gauge sender unit terminal A and PCM terminal 63.

•

Open circuit between fuel gauge sender unit terminal C and body ground.

•

Poor connection of fuel gauge sender unit and/or PCM connector

•

PCM 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

INSPECT FUEL GAUGE SENDER UNIT
CONNECTOR FOR POOR CONNECTION

•

Turn ignition key to OFF.

•

Disconnect fuel gauge sender unit connector.

•

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

•

Is there malfunction?

Yes Repair suspected terminal, then go to Step 8.

No

Go to next step.

1712-1U-01G(01-02B).fm 107 ページ ２００１年６月２９日 金曜日 午後３時２４分