Nissan Frontier D22. Instruction — part 577
DTC P0138, P0158 HO2S2
EC-1411
[VG33ER]
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 the ECM terminals, such as the ground.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
56
OR
Heated oxygen sensor 2
(bank 1)
[Engine is running]
●
Warm-up condition
●
Revving engine from idle to 3,000 rpm quickly after
the following conditions are met
–
Keeping the engine speed between 3,500 and 4,000
rpm for 1 minute and at idle for 1 minute under no
load
0 - Approximately 1.0V
EC-1412
[VG33ER]
DTC P0138, P0158 HO2S2
BANK 2
BBWA1080E
DTC P0138, P0158 HO2S2
EC-1413
[VG33ER]
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 the ECM terminals, such as the ground.
Diagnostic Procedure
UBS00DVP
1.
INSPECTION START
1.
Turn ignition switch OFF.
2.
Loosen and retighten engine ground screws.
3.
Check heated oxygen sensor 2 harness protector color.
4.
Disconnect corresponding heated oxygen sensor 2 harness
connector.
5.
Disconnect ECM harness connector.
>> GO TO 2.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
57
Y
Heated oxygen sensor 2
(bank 2)
[Engine is running]
●
Warm-up condition
●
Revving engine from idle to 3,000 rpm quickly after
the following conditions are met
–
Keeping the engine speed between 3,500 and 4,000
rpm for 1 minute and at idle for 1 minute under no
load
0 - Approximately 1.0V
BBIA0418E
PBIB1423E
EC-1414
[VG33ER]
DTC P0138, P0158 HO2S2
2.
CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Check harness continuity between ECM terminal and HO2S2 terminal as follows.
Refer to Wiring Diagram.
2.
Check harness continuity between ECM terminal or HO2S2 terminal and ground as follows.
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 ground or short to power in harness or connectors.
3.
CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT
1.
Check harness continuity between HO2S2 terminal 4 and engine ground.
Refer to Wiring Diagram.
2.
Also check harness for short to power.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness for open between heated oxygen sensor 2 and engine ground.
>> Repair open circuit to ground or short to power in harness or connectors.
5.
CHECK HO2S2 CONNECTORS FOR WATER
Check heated oxygen sensor 2 connector and harness connector for water.
Water should not exist.
OK or NG
OK (With CONSULT-II)>>GO TO 6.
OK (Without CONSULT-II)>>GO TO 7.
NG
>> Repair or replace harness or connectors.
DTC
Terminals
Bank
ECM
Sensor
P0138
56
1
Bank 1
P0158
57
1
Bank 2
Continuity should exist.
DTC
Terminals
Bank
ECM or sensor
Ground
P0138
56 or 1
Ground
Bank 1
P0158
57 or 1
Ground
Bank 2
Continuity should not exist.
Continuity should exist.
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