Nissan Frontier D22. Manual - part 448

 

  Index      Nissan     Nissan Frontier D22 Pickup (1998-2004 year) - Service and Repair Manual

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  446  447  448  449   ..

 

 

Nissan Frontier D22. Manual - part 448

 

 

DTC P0405, P0406 EGRT SENSOR

EC-895

[VG33E]

C

D

E

F

G

H

I

J

K

L

M

A

EC

5. 

CHECK INTERMITTENT INCIDENT

Perform 

EC-696, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END.

Component Inspection

UBS00DKI

EGR TEMPERATURE SENSOR

1.

Check resistance change and resistance value.

<Reference data>

2.

If NG, replace EGR temperature sensor.

Removal and Installation

UBS00DKJ

EGR TEMPERATURE SENSOR

Refer to 

EM-80, "OUTER COMPONENT PARTS"

 .

SEF643Q

EGR temperature 

°C (°F)

Voltage [V]

Resistance M

0 (32)

4.56

0.62 - 1.05

50 (122)

2.25

0.065 - 0.094

100 (212)

0.59

0.011 - 0.015

SEF068XB

EC-896

[VG33E]

DTC P0420, P0430 THREE WAY CATALYST FUNCTION

DTC P0420, P0430 THREE WAY CATALYST FUNCTION

PFP:20905

On Board Diagnosis Logic

UBS00DKK

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

UBS00DKL

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 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

DTC P0420, P0430 THREE WAY CATALYST FUNCTION

EC-897

[VG33E]

C

D

E

F

G

H

I

J

K

L

M

A

EC

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-898, "Diagnostic Proce-

dure"

 .

Overall Function Check

UBS00DKM

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 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.

7.

Make sure that the voltage switching frequency (high & low)
between ECM terminals 56 and engine ground, or 57 and
engine ground is very less than that of ECM terminals 50 and
engine ground, or 51 and engine ground.
Switching frequency ratio = A/B
A: Heated oxygen sensor 2 voltage switching frequency
B: Heated oxygen sensor 1 voltage switching frequency
This ratio should be less than 0.75.
If the ratio is greater than above, it means three way catalyst
(manifold) does not operate properly. Go to 

EC-898, "Diagnostic

Procedure"

 .

SEF345Z

SEF560X

SEF441V

SEF442V

EC-898

[VG33E]

DTC P0420, P0430 THREE WAY CATALYST FUNCTION

NOTE:
If the voltage at terminal 50 or 51 does not switch periodically more than 5 times within 10 seconds at step 5,
perform trouble diagnosis for DTC P0133, P0153 first. (See 

EC-777, "DTC P0133, P0153 HO2S1"

 .)

Diagnostic Procedure

UBS00DKN

1. 

CHECK EXHAUST SYSTEM

Visually check exhaust tubes and muffler for dent.
OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace it.

2. 

CHECK EXHAUST GAS LEAK

1.

Start engine and run it at idle.

2.

Listen for an exhaust gas leak before the three way catalyst (manifold).

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace.

3. 

CHECK INTAKE AIR LEAK

Listen for an intake air leak after the mass air flow sensor.

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace.

4. 

CHECK IGNITION TIMING

Check the following items. Refer to 

EC-646, "Basic Inspection"

 .

OK or NG

OK

>> GO TO 5.

NG

>> Adjust ignition timing.

SEC502D

Items

Specifications

Ignitions timing

10 

± 5° BTDC

Base idle speed

700 

± 50 rpm (in P or N position)

 Closed throttle position switch idle 
position adjustment

Feeler gauge thickness and switch 
condition
0.3 mm (0.012 in): ON
0.4 mm (0.016 in): OFF

Target idle speed

750 

± 50 rpm (in P or N position)

 

 

 

 

 

 

 

Content   ..  446  447  448  449   ..