Infiniti I30 (A33). Manual — part 241
Wiring Diagram
=NHEC0160
BANK 1
NHEC0160S01
MEC412D
SEF657XD
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0140 (BANK 1), P0160 (BANK 2) HO2S2 (REAR) (HIGH VOLTAGE)
Wiring Diagram
EC-279
BANK 2
NHEC0160S02
MEC413D
SEF658XD
DTC P0140 (BANK 1), P0160 (BANK 2) HO2S2 (REAR) (HIGH VOLTAGE)
Wiring Diagram (Cont’d)
EC-280
Diagnostic Procedure
NHEC0161
1
INSPECTION START
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
SEF255X
3. Check heated oxygen sensor 2 (rear) harness protector color.
SEC021C
4. Disconnect corresponding heated oxygen sensor 2 (rear) harness connector.
SEF467WB
5. Disconnect ECM harness connector.
©
GO TO 2.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0140 (BANK 1), P0160 (BANK 2) HO2S2 (REAR) (HIGH VOLTAGE)
Diagnostic Procedure
EC-281
2
CHECK HO2S2 (REAR) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal and HO2S2 (rear) terminal as follows.
Refer to Wiring Diagram.
MTBL0606
Continuity should exist.
2. Check harness continuity between ECM terminal or HO2S2 (rear) terminal and ground as follows.
Refer to Wiring Diagram.
MTBL0607
Continuity should not exist.
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 (REAR) GROUND CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between HO2S2 (rear) terminal 4 and engine ground.
Refer to Wiring Diagram.
Continuity should exist.
2. 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 connectors.
4
CHECK HO2S2 (REAR) CONNECTORS FOR WATER
Check heated oxygen sensor 2 (rear) connector and harness connector for water.
Water should not exist.
OK or NG
OK (With CONSULT-II)
©
GO TO 5.
OK (Without CONSULT-
II)
©
GO TO 6.
NG
©
Repair or replace harness or connectors.
DTC P0140 (BANK 1), P0160 (BANK 2) HO2S2 (REAR) (HIGH VOLTAGE)
Diagnostic Procedure (Cont’d)
EC-282
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