Infiniti M45 (Y34). Manual - part 381

DTC P0128 THERMOSTAT FUNCTION

EC-213

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EC

Component Inspection

ABS002GK

ENGINE COOLANT TEMPERATURE SENSOR

Check resistance as shown in the figure.

<Reference data>

If NG, replace engine coolant temperature sensor.

Removal and Installation

ABS002GL

ENGINE COOLANT TEMPERATURE SENSOR

Refer to 

EM-65, "CYLINDER HEAD"

 .

PBIB2005E

Temperature 

°

C (

°

F)

Resistance k

Ω

20 (68)

2.1 - 2.9

50 (122)

0.68 - 1.0

90 (194)

0.236 - 0.260

SEF012P

EC-214

DTC P0132, P0152 HO2S1

DTC P0132, P0152 HO2S1

PFP:22690

Component Description

ABS002GM

The heated oxygen sensor 1 is placed into the exhaust manifold. It
detects the amount of oxygen in the exhaust gas compared to the
outside air. The heated oxygen sensor 1 has a closed-end tube
made of ceramic zirconia. The zirconia generates voltage from
approximately 1V in richer conditions to 0V in leaner conditions. The
heated oxygen sensor 1 signal is sent to the ECM. The ECM adjusts
the injection pulse duration to achieve the ideal air-fuel ratio. The
ideal air-fuel ratio occurs near the radical change from 1 to 0V.

CONSULT-II Reference Value in Data Monitor Mode

ABS002GN

Specification data are reference values.

On Board Diagnosis Logic

ABS002GO

To judge the malfunction, the diagnosis checks that the heated oxy-
gen sensor 1 output is not inordinately high.

SEF463R

SEF288D

MONITOR ITEM

CONDITION

SPECIFICATION

HO2S1 (B1)
HO2S1 (B2)

●

Engine: After warming up

Maintaining engine speed at 2,000 rpm

0 - 0.3V 

←→

 Approx. 0.6 - 1.0V

HO2S1 MNTR (B1)
HO2S1 MNTR (B2)

●

Engine: After warming up

Maintaining engine speed at 2,000 rpm

LEAN 

←→

 RICH

Changes more than 5 times during 
10 seconds.

PBIB1877E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0132
0132
(Bank 1)

Heated oxygen sensor 1 
circuit high voltage

An excessively high voltage from the sensor is 
sent to ECM.

●

Harness or connectors
(The sensor circuit is open or shorted)

●

Heated oxygen sensor 1

P0152
0152
(Bank 2)

DTC P0132, P0152 HO2S1

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DTC Confirmation Procedure

ABS002GP

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

1.

Start engine and warm it up to normal operating temperature.

2.

Turn ignition switch OFF and wait at least 10 seconds.

3.

Turn ignition switch ON.

4.

Select “DATA MONITOR” mode with CONSULT-II.

5.

Restart engine and let it idle for 2 minutes.

6.

If 1st trip DTC is detected, go to 

EC-219, "Diagnostic Procedure"

.

 WITH GST

1.

Start engine and warm it up to normal operating temperature.

2.

Turn ignition switch OFF and wait at least 10 seconds.

3.

Restart engine and let it idle for 2 minutes.

4.

Turn ignition switch OFF and wait at least 10 seconds.

5.

Restart engine and let it idle for 2 minutes.

6.

Select “MODE 3” with GST.

7.

If 1st trip DTC is detected, go to 

EC-219, "Diagnostic Procedure"

 .

●

When using GST, DTC Confirmation Procedure should be performed twice as much as when using
CONSULT-II because GST cannot display MODE 7 (1st trip DTC) concerning this diagnosis. There-
fore, using CONSULT-II is recommended.

SEF174Y

EC-216

DTC P0132, P0152 HO2S1

Wiring Diagram

ABS002GQ

BANK 1

TBWA0274E