Infiniti M45 (Y34). Manual - part 382

DTC P0132, P0152 HO2S1

EC-217

C

D

E

F

G

H

I

J

K

L

M

A

EC

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)

EC-218

DTC P0132, P0152 HO2S1

BANK 2

TBWA0275E

DTC P0132, P0152 HO2S1

EC-219

C

D

E

F

G

H

I

J

K

L

M

A

EC

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.

Diagnostic Procedure

ABS002GR

1. 

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

Loosen and retighten two ground screws. 
Refer to 

EC-141, "Ground Inspection"

 .

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

2. 

RETIGHTEN HEATED OXYGEN SENSOR 1

1.

Loosen and retighten corresponding heated oxygen sensor 1.

>> GO TO 3.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

115

L

Heated oxygen sensor 1 
(bank 2)

[Engine is running]

●

Warm-up condition

●

Engine speed: 2,000 rpm.

0 - Approximately 1.0V
(Periodically change)

PBIB1118E

Tightening torque: 40 - 50 N·m (4.1 - 5.1 kg-m, 30 - 37 ft-lb)

PBIB0016E

EC-220

DTC P0132, P0152 HO2S1

3. 

CHECK HO2S1 GROUND CIRCUIT FOR OPEN AND SHORT

1.

Disconnect heated oxygen sensor 1 harness connector.

2.

Check harness continuity between HO2S1 terminal 4 and ground.
Refer to Wiring Diagram.

3.

Also check harness for short to power.

OK or NG

OK

>> GO TO 4.

NG

>> Repair open circuit or short to power in harness or connector.

4. 

CHECK HO2S1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Disconnect ECM harness connector.

2.

Check harness continuity between ECM terminal and HO2S1 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 power.

OK or NG

OK

>> GO TO 5.

NG

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

Continuity should exist.

PBIB0017E

DTC

Terminals

Bank

ECM

Sensor

P0132

114

1

1

P0152

115

1

2

Continuity should exist.

DTC

Terminals

Bank

ECM

Sensor

P0132

114

1

1

P0152

115

1

2

Continuity should not exist.