Infiniti F50. Manual - part 464

 

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Infiniti F50. Manual - part 464

 

 

DTC P1147, P1167 HO2S2

EC-497

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EC

5. 

CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Disconnect ECM harness connector.

2.

Check harness continuity between ECM terminal and HO2S2 terminal as follows.
Refer to Wiring Diagram.

3.

Check harness continuity between the following terminals and ground.
Refer to Wiring Diagram.

4.

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

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 6.

6. 

DETECT MALFUNCTIONING PART

Check the following.

Harness connectors E315, F5

Harness open or short between HO2S2 and ECM

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

7. 

CHECK HEATED OXYGEN SENSOR 2

Refer to 

EC-497, "Component Inspection"

 .

OK or NG

OK

>> GO TO 8.

NG

>> Replace malfunctioning heated oxygen sensor 2.

8. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Component Inspection

EBS00MJC

HEATED OXYGEN SENSOR 2

 With CONSULT-II

1.

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

2.

Turn ignition switch “OFF” and wait at least 10 seconds.

3.

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

4.

Let engine idle for 1 minute.

DTC

Terminals

Bank

ECM

Sensor

P1147

123

1

1

P1167

124

1

2

Continuity should exist.

DTC

Terminals

Bank

ECM

Sensor

P1147

123

1

1

P1167

124

1

2

Continuity should not exist.

EC-498

DTC P1147, P1167 HO2S2

5.

Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select
“HO2S2 (B1)/(B2)” as the monitor item with CONSULT-II.

6.

Check “HO2S2 (B1)/(B2)” at idle speed when adjusting “FUEL INJECTION” to 

±

25%.

“HO2S2 (B1)/(B2)” should be above 0.58V at least once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)/(B2)” should be below 0.48V at least once when the “FUEL INJECTION” is 

25%.

CAUTION:

Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7
in) onto a hard surface such as a concrete floor; use a new one.

Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.

 Without CONSULT-II

1.

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

2.

Turn ignition switch “OFF” and wait at least 10 seconds.

3.

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

4.

Let engine idle for 1 minute.

5.

Set voltmeter probes between ECM terminal 123 [HO2S2 (B1) signal] or 124 [HO2S2 (B2) signal] and
engine ground.

6.

Check the voltage when revving up to 4,000 rpm under no load
at least 10 times.
(Depress and release accelerator pedal as soon as possible.)
The voltage should be above 0.58V at least once during this
procedure.
If the voltage is above 0.58V at step 6, step 7 is not neces-
sary.

7.

Keep vehicle at idling for 10 minutes, then check voltage. Or
check the voltage when coasting from 80 km/h (50 MPH) in “D”
position.
The voltage should be below 0.48V at least once during this
procedure.

8.

If NG, replace heated oxygen sensor 2.

CAUTION:

Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7
in) onto a hard surface such as a concrete floor; use a new one.

Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.

PBIB1918E

PBIB1153E

PBIB0068E

DTC P1147, P1167 HO2S2

EC-499

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EC

Removal and Installation

EBS00MJD

HEATED OXYGEN SENSOR 2

Refer to 

EM-22, "EXHAUST MANIFOLD AND THREE WAY CATALYST"

 .

EC-500

DTC P1148, P1168 CLOSED LOOP CONTROL

DTC P1148, P1168 CLOSED LOOP CONTROL

PFP:22690

On Board Diagnosis Logic

EBS00MJE

These self-diagnoses have the one trip detection logic.

DTC Confirmation Procedure

EBS00MJF

CAUTION:

Always drive vehicle at a safe speed.

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.
TESTING CONDITION:

Never raise engine speed above 3,600 rpm during the “DTC Confirmation Procedure”. If the engine
speed limit is exceeded, retry the procedure from step 2.

Before performing the following procedure, confirm that battery voltage is more than 11V at idle.

 WITH CONSULT-II

1.

Start engine and warm it up to normal operating 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.

Select “DATA MONITOR” mode with CONSULT-II.

6.

Hold engine speed at 2,000 rpm and check one of the following.

“HO2S1 (B1)/(B2)” voltage should go above 0.70V at least once.

“HO2S1 (B1)/(B2)” voltage should go below 0.21V at least once.
If the check result is NG, perform 

EC-501, "Diagnostic Proce-

dure"

 .

If the check result is OK, perform the following step.

7.

Let engine idle at least 5 minutes.

8.

Maintain the following condition at least 50 consecutive sec-
onds.

During this test, P0132 and/or P0152 may be displayed on CONSULT-II screen.

9.

If DTC is detected, go to 

EC-501, "Diagnostic Procedure"

 .

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1148
1148
(Bank 1)

Closed loop control 
function

The closed loop control function for bank 1 
does not operate even when vehicle is driving 
in the specified condition.

The heated oxygen sensor 1 circuit is 
open or shorted.

Heated oxygen sensor 1

Heated oxygen sensor 1 heater

P1168
1168
(Bank 2)

The closed loop control function for bank 2 
does not operate even when vehicle is driving 
in the specified condition.

B/FUEL SCHDL

4.0 msec or more

ENG SPEED

More than 1,300 rpm

Selector lever

Suitable position

VHCL SPEED SE

More than 71 km/h (44 MPH)

PBIB2025E

 

 

 

 

 

 

 

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