Nissan Frontier D22. Manual — 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.
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