Infiniti M45 (Y34). Manual — part 387

DTC P0134, P0154 HO2S1

EC-237

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DTC Confirmation Procedure

ABS002H6

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:
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.

Select “HO2S1 (B1) P0134” or “HO2S1 (B2) P0154” of “HO2S1”
in “DTC WORK SUPPORT” mode with CONSULT-II.

3.

Touch “START”.

4.

Let it idle for at least 3 minutes.
NOTE:
Never raise engine speed above 3,000 rpm after this step. If
the engine speed limit is exceeded, return to step 4.

5.

When the following conditions are met, “TESTING” will be dis-
played on the CONSULT-II screen. Maintain the conditions con-
tinuously until “TESTING” changes to “COMPLETED”. (It will
take approximately 10 to 60 seconds.)

If “TESTING” is not displayed after 5 minutes, retry from
step 2.

6.

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

EC-242, "Diagnostic

Procedure"

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PBIB0544E

ENG SPEED

1,100 - 3,000 rpm

VHCL SPEED SE

More than 64 km/h (40 MPH)

B/FUEL SCHDL

1.6 - 12.0 msec

Selector lever

Suitable position

PBIB0545E

SEC750C

EC-238

DTC P0134, P0154 HO2S1

Overall Function Check

ABS002H7

Use this procedure to check the overall function of the heated oxygen sensor 1 circuit. During this check, a 1st
trip DTC might not be confirmed.

WITH GST

1.

Start engine and warm it up to normal operating temperature.

2.

Set voltmeter probes between ECM terminal 114 [HO2S1 (B1) signal] or 115 [HO2S1 (B2) signal] and
ground.

3.

Check the following with engine speed held at 2,000 rpm con-
stant under no load.

–

The voltage does not remain in the range of 0.2 to 0.4V.

4.

If NG, go to

EC-242, "Diagnostic Procedure"

.

PBIB0063E

DTC P0134, P0154 HO2S1

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Wiring Diagram

ABS002H8

BANK 1

TBWA0274E

EC-240

DTC P0134, P0154 HO2S1

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)

114

L/R

Heated oxygen sensor 1
(bank 1)

[Engine is running]

●

Warm-up condition

●

Engine speed: 2,000 rpm.

0 - Approximately 1.0V
(Periodically change)