Infiniti F50. Manual - part 459

 

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Infiniti F50. Manual - part 459

 

 

DTC P1146, P1166 HO2S2

EC-477

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DTC Confirmation Procedure

EBS00MIZ

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:
For better results, perform “DTC WORK SUPPORT” at a temperature of 0 to 30 

°

C (32 to 86 

°

F).

1.

Turn ignition switch “ON” and select “DATA MONITOR” mode
with CONSULT-II.

2.

Start engine and warm it up to the normal operating tempera-
ture.

3.

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

4.

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

5.

Let engine idle for 1 minute.

6.

Select “HO2S2 (B1) P1146” or “HO2S2 (B2) P1166” of “HO2S2”
in “DTC WORK SUPPORT” mode with CONSULT-II.

7.

Start engine and following the instruction of CONSULT-II.

8.

Make sure that “OK” is displayed after touching “SELF-DIAG RESULTS”.
If “NG” is displayed, refer to 

EC-482, "Diagnostic Procedure"

 .

If “CAN NOT BE DIAGNOSED” is displayed, perform the following.

a.

Turn ignition switch “OFF” and leave the vehicle in a cool place (soak the vehicle).

b.

Return to step 1.

Overall Function Check

EBS00MJ0

Use this procedure to check the overall function of the heated oxygen sensor 2 circuit. During this check, a
DTC might not be confirmed.

 WITH GST

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

SEF189Y

PBIB0818E

EC-478

DTC P1146, P1166 HO2S2

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 below 0.48V at least once during this
procedure.
If the voltage can be confirmed in step 6, step 7 is not nec-
essary.

7.

Keep vehicle at idling for 10 minutes, then check the 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, go to 

EC-482, "Diagnostic Procedure"

 .

PBIB0068E

DTC P1146, P1166 HO2S2

EC-479

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Wiring Diagram

EBS00MJ1

BANK 1

TBWM0147E

EC-480

DTC P1146, P1166 HO2S2

Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

123

PU

Heated oxygen sensor 2 
(bank 1)

[Engine is running]

Revving engine from idle up to 3,000 rpm 
quickly after the following conditions are met.

Warm-up condition

Keeping the engine speed between 3,500 
and 4,000 rpm for 1 minute and at idle for 1 
minute under no load

0 - Approximately 1.0V

 

 

 

 

 

 

 

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