Nissan Frontier D22. Instruction — part 423

DTC P0134, P0154 HO2S1

EC-795

[VG33E]

C

D

E

F

G

H

I

J

K

L

M

A

EC

BANK 2

BBWA1076E

EC-796

[VG33E]

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 the 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)

51

G

Heated oxygen sensor
1 (bank 2)

[Engine is running]

●

Warm-up condition

●

Engine speed is 2,000 rpm

0 - Approximately 1.0V

SEF002V

DTC P0134, P0154 HO2S1

EC-797

[VG33E]

C

D

E

F

G

H

I

J

K

L

M

A

EC

Diagnostic Procedure

UBS00DI9

1.

INSPECTION START

1.

Turn ignition switch OFF.

2.

Loosen and retighten engine ground screws.

3.

Make sure HO2S 1 harness protector color, and disconnect cor-
responding heated oxygen sensor 1 harness connector.

>> GO TO 2.

BBIA0418E

PBIB0636E

BBIA0188E

EC-798

[VG33E]

DTC P0134, P0154 HO2S1

2.

CHECK HO2S 1 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 ECM terminal or HO2S1 terminal and ground as follows.
Refer to Wiring Diagram.

4.

Also check harness for short to power.

OK or NG

OK (With CONSULT-II)>>GO TO 3.
OK (Without CONSULT-II)>> GO TO 4.
NG

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

DTC

Terminals

Bank

ECM

Sensor

P0134

50

2

Bank 1

P0154

51

2

Bank 2

Continuity should exist.

DTC

Terminals

Bank

ECM or sensor

Ground

P0134

50 or 2

Ground

Bank 1

P0154

51 or 2

Ground

Bank 2

Continuity should not exist.