Infiniti F50. Manual — part 399
DTC P0134, P0154 HO2S1
EC-237
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
R/L
Heated oxygen sensor 1
(bank 1)
[Engine is running]
●
Warm-up condition
●
Engine speed is 2,000 rpm.
0 - Approximately 1.0V
(Periodically change)
EC-238
DTC P0134, P0154 HO2S1
BANK 2
TBWM0144E
DTC P0134, P0154 HO2S1
EC-239
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
EBS00LZL
1.
INSPECTION START
1.
Turn ignition switch “OFF”.
2.
Loosen and retighten engine ground screws.
>> GO TO 2.
2.
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 engine ground.
Refer to Wiring Diagram.
3.
Also check harness for short to power.
OK or NG
OK
>> GO TO 3.
NG
>> Repair open circuit or short to power in harness or connectors.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
115
L/W
Heated oxygen sensor 1
(bank 2)
[Engine is running]
●
Warm-up condition
●
Engine speed is 2,000 rpm.
0 - Approximately 1.0V
(Periodically change)
PBIB0011E
Continuity should exist.
PBIB1250E
EC-240
DTC P0134, P0154 HO2S1
3.
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 4.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK HEATED OXYGEN SENSOR 1
Refer to
EC-240, "Component Inspection"
OK or NG
OK
>> GO TO 6.
NG
>> Replace malfunctioning heated oxygen sensor 1.
5.
CHECK INTERMITTENT INCIDENT
Refer to
EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Component Inspection
EBS00LZM
HEATED OXYGEN SENSOR 1
With CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Select “MANU TRIG” and adjust “TRIGGER POINT” to 100% in
“DATA MONITOR” mode with CONSULT-II.
3.
Select “HO2S1 (B1)/(B2)” and “HO2S1 MNTR (B1)/(B2)”.
4.
Hold engine speed at 2,000 rpm under no load during the follow-
ing steps.
5.
Touch “RECORD” on CONSULT-II screen.
DTC
Terminals
Bank
ECM
Sensor
P0134
114
1
1
P0154
115
1
2
Continuity should exist.
DTC
Terminals
Bank
ECM
Sensor
P0134
114
1
1
P0154
115
1
2
Continuity should not exist.
PBIB2025E
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