Infiniti F50. Manual — part 464
DTC P1147, P1167 HO2S2
EC-497
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EC
5.
CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Disconnect ECM harness connector.
2.
Check harness continuity between ECM terminal and HO2S2 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 ground or short to power.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 6.
6.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors E315, F5
●
Harness open or short between HO2S2 and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
7.
CHECK HEATED OXYGEN SENSOR 2
Refer to
EC-497, "Component Inspection"
OK or NG
OK
>> GO TO 8.
NG
>> Replace malfunctioning heated oxygen sensor 2.
8.
CHECK INTERMITTENT INCIDENT
Refer to
EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
Component Inspection
EBS00MJC
HEATED OXYGEN SENSOR 2
With CONSULT-II
1.
Start engine and warm it up to the normal operating temperature.
2.
Turn ignition switch “OFF” and wait at least 10 seconds.
3.
Start engine and keep engine speed between 3,500 and 4,000 rpm for 1 minute under no load.
4.
Let engine idle for 1 minute.
DTC
Terminals
Bank
ECM
Sensor
P1147
123
1
1
P1167
124
1
2
Continuity should exist.
DTC
Terminals
Bank
ECM
Sensor
P1147
123
1
1
P1167
124
1
2
Continuity should not exist.
EC-498
DTC P1147, P1167 HO2S2
5.
Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select
“HO2S2 (B1)/(B2)” as the monitor item with CONSULT-II.
6.
Check “HO2S2 (B1)/(B2)” at idle speed when adjusting “FUEL INJECTION” to
±
25%.
“HO2S2 (B1)/(B2)” should be above 0.58V at least once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)/(B2)” should be below 0.48V at least once when the “FUEL INJECTION” is
−
25%.
CAUTION:
●
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7
in) onto a hard surface such as a concrete floor; use a new one.
●
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
Without CONSULT-II
1.
Start engine and warm it up to the normal operating temperature.
2.
Turn ignition switch “OFF” and wait at least 10 seconds.
3.
Start engine and keep engine speed between 3,500 and 4,000 rpm for 1 minute under no load.
4.
Let engine idle for 1 minute.
5.
Set voltmeter probes between ECM terminal 123 [HO2S2 (B1) signal] or 124 [HO2S2 (B2) signal] and
engine ground.
6.
Check the voltage when revving up to 4,000 rpm under no load
at least 10 times.
(Depress and release accelerator pedal as soon as possible.)
The voltage should be above 0.58V at least once during this
procedure.
If the voltage is above 0.58V at step 6, step 7 is not neces-
sary.
7.
Keep vehicle at idling for 10 minutes, then check voltage. Or
check the voltage when coasting from 80 km/h (50 MPH) in “D”
position.
The voltage should be below 0.48V at least once during this
procedure.
8.
If NG, replace heated oxygen sensor 2.
CAUTION:
●
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7
in) onto a hard surface such as a concrete floor; use a new one.
●
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
PBIB1918E
PBIB1153E
PBIB0068E
DTC P1147, P1167 HO2S2
EC-499
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EC
Removal and Installation
EBS00MJD
HEATED OXYGEN SENSOR 2
Refer to
EC-500
DTC P1148, P1168 CLOSED LOOP CONTROL
DTC P1148, P1168 CLOSED LOOP CONTROL
PFP:22690
On Board Diagnosis Logic
EBS00MJE
These self-diagnoses have the one trip detection logic.
DTC Confirmation Procedure
EBS00MJF
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
●
Never raise engine speed above 3,600 rpm during the “DTC Confirmation Procedure”. If the engine
speed limit is exceeded, retry the procedure from step 2.
●
Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
WITH CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Turn ignition switch “OFF” and wait at least 10 seconds,
3.
Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
4.
Let engine idle for 1 minute.
5.
Select “DATA MONITOR” mode with CONSULT-II.
6.
Hold engine speed at 2,000 rpm and check one of the following.
–
“HO2S1 (B1)/(B2)” voltage should go above 0.70V at least once.
–
“HO2S1 (B1)/(B2)” voltage should go below 0.21V at least once.
If the check result is NG, perform
.
If the check result is OK, perform the following step.
7.
Let engine idle at least 5 minutes.
8.
Maintain the following condition at least 50 consecutive sec-
onds.
During this test, P0132 and/or P0152 may be displayed on CONSULT-II screen.
9.
If DTC is detected, go to
EC-501, "Diagnostic Procedure"
.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1148
1148
(Bank 1)
Closed loop control
function
The closed loop control function for bank 1
does not operate even when vehicle is driving
in the specified condition.
●
The heated oxygen sensor 1 circuit is
open or shorted.
●
Heated oxygen sensor 1
●
Heated oxygen sensor 1 heater
P1168
1168
(Bank 2)
The closed loop control function for bank 2
does not operate even when vehicle is driving
in the specified condition.
B/FUEL SCHDL
4.0 msec or more
ENG SPEED
More than 1,300 rpm
Selector lever
Suitable position
VHCL SPEED SE
More than 71 km/h (44 MPH)
PBIB2025E
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