Infiniti F50. Manual - part 379

DTC P0031, P0032, P0051, P0052 HO2S1 HEATER

EC-157

C

D

E

F

G

H

I

J

K

L

M

A

EC

Wiring Diagram

EBS00LX0

BANK 1

TBWM0145E

EC-158

DTC P0031, P0032, P0051, P0052 HO2S1 HEATER

Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measure by CONSULT-II.

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.

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

8

BR

Heated oxygen sensor 1 
heater (bank 1)

[Engine is running]

●

Warm-up condition

●

Engine speed is below 3,600 rpm.

Approximately 7V

[Engine is running]

●

Engine speed is above 3,600 rpm.

BATTERY VOLTAGE
(11 - 14V)

PBIB0519E

DTC P0031, P0032, P0051, P0052 HO2S1 HEATER

EC-159

C

D

E

F

G

H

I

J

K

L

M

A

EC

BANK 2

TBWM0146E

EC-160

DTC P0031, P0032, P0051, P0052 HO2S1 HEATER

Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.

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.

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

Diagnostic Procedure

EBS00LX1

1. 

CHECK HO2S1 POWER SUPPLY CIRCUIT

1.

Turn ignition switch “OFF”.

2.

Disconnect heated oxygen sensor 1 harness connector.

3.

Turn ignition switch “ON”.

4.

Check voltage between HO2S1 terminal 3 and ground with
CONSULT-II or tester.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

9

G/Y

Heated oxygen sensor 1 
heater (bank 2)

[Engine is running]

●

Warm-up condition

●

Engine speed is below 3,600 rpm.

Approximately 7V

[Engine is running]

●

Engine speed is above 3,600 rpm.

BATTERY VOLTAGE
(11 - 14V)

PBIB0519E

Voltage: Battery voltage

PBIB1250E

PBIB0112E