Infiniti M45 (Y34). Manual — part 368
DTC P0031, P0032, P0051, P0052 HO2S1 HEATER
EC-161
C
D
E
F
G
H
I
J
K
L
M
A
EC
BANK 2
TBWA0268E
EC-162
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
ABS002EP
1.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF.
2.
Loosen and retighten two ground screws.
Refer to
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
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: Below 3,000 rpm.
Approximately 7V
[Engine is running]
●
Engine speed: Above 3,000 rpm.
BATTERY VOLTAGE
(11 - 14V)
PBIB0519E
PBIB1118E
DTC P0031, P0032, P0051, P0052 HO2S1 HEATER
EC-163
C
D
E
F
G
H
I
J
K
L
M
A
EC
2.
CHECK HO2S1 POWER SUPPLY CIRCUIT
1.
Disconnect heated oxygen sensor 1 harness connector.
2.
Turn ignition switch ON.
3.
Check voltage between HO2S1 terminal 3 and ground with
CONSULT-II or tester.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 3.
3.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors E33, F33
●
Fuse block (J/B) No.1 connector E201
●
10A fuse
●
Harness for open or short between heated oxygen sensor 1 and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK HO2S1 OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check harness continuity between ECM terminal and HO2S1 terminal as follows.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 5.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
Voltage: Battery voltage
PBIB0017E
PBIB0112E
DTC
Terminals
Bank
ECM
Sensor
P0031, P0032
8
2
1
P0051, P0052
9
2
2
Continuity should exist.
EC-164
DTC P0031, P0032, P0051, P0052 HO2S1 HEATER
5.
CHECK HEATED OXYGEN SENSOR 1 HEATER
Refer to
EC-164, "Component Inspection"
OK or NG
OK
>> GO TO 6.
NG
>> Replace malfunctioning heated oxygen sensor 1.
6.
CHECK INTERMITTENT INCIDENT
Refer to
EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Component Inspection
ABS002EQ
HEATED OXYGEN SENSOR 1 HEATER
1.
Check resistance between HO2S1 terminals as follows.
2.
If NG, replace heated oxygen sensor 1.
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 sur-
face 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.
Removal and Installation
ABS002ER
HEATED OXYGEN SENSOR 1
Refer to
EM-22, "EXHAUST MANIFOLD AND THREE WAY CATALYST"
.
Terminal No.
Resistance
2 and 3
3.3 - 4.0
Ω
[at 25
°
C (77
°
F)]
1 and 2, 3, 4
∞
Ω
(Continuity should not exist)
4 and 1, 2, 3
SEF249Y
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст