Infiniti M45 (Y34). Manual — part 382
DTC P0132, P0152 HO2S1
EC-217
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
L/R
Heated oxygen sensor 1
(bank 1)
[Engine is running]
●
Warm-up condition
●
Engine speed: 2,000 rpm.
0 - Approximately 1.0V
(Periodically change)
EC-218
DTC P0132, P0152 HO2S1
BANK 2
TBWA0275E
DTC P0132, P0152 HO2S1
EC-219
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
ABS002GR
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.
2.
RETIGHTEN HEATED OXYGEN SENSOR 1
1.
Loosen and retighten corresponding heated oxygen sensor 1.
>> GO TO 3.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
115
L
Heated oxygen sensor 1
(bank 2)
[Engine is running]
●
Warm-up condition
●
Engine speed: 2,000 rpm.
0 - Approximately 1.0V
(Periodically change)
PBIB1118E
Tightening torque: 40 - 50 N·m (4.1 - 5.1 kg-m, 30 - 37 ft-lb)
PBIB0016E
EC-220
DTC P0132, P0152 HO2S1
3.
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 ground.
Refer to Wiring Diagram.
3.
Also check harness for short to power.
OK or NG
OK
>> GO TO 4.
NG
>> Repair open circuit or short to power in harness or connector.
4.
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 5.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
Continuity should exist.
PBIB0017E
DTC
Terminals
Bank
ECM
Sensor
P0132
114
1
1
P0152
115
1
2
Continuity should exist.
DTC
Terminals
Bank
ECM
Sensor
P0132
114
1
1
P0152
115
1
2
Continuity should not exist.
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