Nissan Frontier D22. Manual - part 595

 

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Nissan Frontier D22. Manual - part 595

 

 

DTC P0340 CMP SENSOR

EC-1483

[VG33ER]

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EC

4. 

CHECK CMP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between CMP sensor terminal 4 and ECM terminal 49, CMP sensor terminal 3
and ECM terminals 44, 48. Refer to Wiring Diagram.

4.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 5

NG 

>> Repair open circuit or short to ground or short to power in harness or connectors.

5. 

CHECK CMP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Check harness continuity between CMP sensor terminal 6 and engine ground.

3.

Also check harness for short to power.

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 6.

6. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness for open between camshaft position sensor and engine ground

>> Repair open circuit or short to power in harness or connector.

Continuity should exist.

Continuity should exist.

EC-1484

[VG33ER]

DTC P0340 CMP SENSOR

7. 

CHECK CAMSHAFT POSITION SENSOR

1.

Install any parts removed.

2.

Start engine.

3.

Check voltage between ECM terminals 44, 48 and ground, ECM
terminal 49 and ground with DC range.
<Terminal 44 or 48 and engine ground>

<Terminal 49 and engine ground>

OK or NG

OK

>> GO TO 8.

NG

>> Replace distributor assembly with camshaft position sensor.

8. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-1297, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>>  INSPECTION END.

Removal and Installation

UBS00DXA

DISTRIBUTOR

Refer to 

EM-80, "OUTER COMPONENT PARTS"

 .

Condition

Idle

2,000 rpm

Voltage

0.3 - 0.5V

0.3 - 0.5V

Pulse sig-

nal

Condition

Idle

2,000 rpm

Voltage

Approximately 2.5V

Approximately 2.5V

Pulse sig-

nal

PBIB1424E

SEF997U

SEF998U

SEF999U

SEF001V

DTC P0420, P0430 THREE WAY CATALYST FUNCTION

EC-1485

[VG33ER]

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DTC P0420, P0430 THREE WAY CATALYST FUNCTION

PFP:20905

On Board Diagnosis Logic

UBS00DXB

The ECM monitors the switching frequency ratio of heated oxygen
sensors 1 and 2.
A three way catalyst (Manifold) with high oxygen storage capacity
will indicate a low switching frequency of heated oxygen sensor 2.
As oxygen storage capacity decreases, the heated oxygen sensor 2
switching frequency will increase.
When the frequency ratio of heated oxygen sensors 1 and 2
approaches a specified limit value, the three way catalyst (Manifold)
malfunction is diagnosed.

DTC Confirmation Procedure

UBS00DXC

NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.

 WITH CONSULT-II

TESTING CONDITION

●

Do not hold engine speed for more than the specified minutes below.

1.

Start engine and warm it up to the normal operating temperature.

2.

Turn ignition switch OFF and wait at least 5 seconds.

3.

Start engine and keep the engine speed at between 3,500 and 4,000 rpm for at least 1 minute under no
load.

4.

Let engine idle for 1 minute.

5.

Open engine hood.

6.

Select “DTC & SRT CONFIRMATION” then “SRT WORK SUP-
PORT” mode with CONSULT-II.

7.

Rev engine up to 2,000 to 3,000 rpm and hold it for 3 consecu-
tive minutes then release the accelerator pedal completely.
If  “INCMP” of “CATALYST” changed to “COMPLT”, go to step
10.

8.

Wait 5 seconds at idle.

SEF484YF

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0420
(Bank 1)

Catalyst system effi-
ciency below threshold

●

Three way catalyst (Manifold) does not oper-
ate properly.

●

Three way catalyst (Manifold) does not have 
enough oxygen storage capacity.

●

Three way catalyst (Manifold)

●

Exhaust tube

●

Intake air leaks

●

Fuel injector

●

Fuel injector leaks

●

Spark plug

●

Improper ignition timing

P0430
(Bank 2)

SEF344Z

EC-1486

[VG33ER]

DTC P0420, P0430 THREE WAY CATALYST FUNCTION

9.

Rev engine up to 2,000 to 3,000 rpm and maintain it until
“INCMP” of “CATALYST” changes to “CMPLT” (It will take
approximately 5 minutes).
If not “CMPLT”, perform the following.

10. Select “SELF-DIAG RESULTS” mode with CONSULT-II.

11. Confirm that the 1st trip DTC is not detected.

If the 1st trip DTC is detected, go to 

EC-1488, "Diagnostic Pro-

cedure"

 .

Overall Function Check

UBS00DXD

Use this procedure to check the overall function of the three way catalyst (manifold). During this check, a DTC
might not be confirmed.

CAUTION:

Always drive vehicle at a safe speed.

 WITH GST

1.

Start engine and warm it up to the normal operation temperature.

2.

Turn ignition switch OFF and wait at least 10 seconds.

3.

Start engine and keep the engine speed at between 3,500 and 4,000 rpm for at least 1 minute under no
load.

4.

Let engine idle for 1 minute.

5.

Set voltmeters probes between ECM terminals 50 [HO2S1
(bank 1) signal], 51 [HO2S1 (bank 2) signal] and engine ground,
and ECM terminals 56 [HO2S2 (bank 1) signal], 57 [HO2S2
(bank 2) signal] and engine ground.

6.

Keep engine speed at 2,000 rpm constant under no load.

SEF345Z

SEF560X

SEF441V

 

 

 

 

 

 

 

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