Infiniti I30 (A33). Manual — part 243

Wiring Diagram

NHEC0167

BANK 1

NHEC0167S01

MEC414D

SEF659XD

GI

MA

EM

LC

FE

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

DTC P0141 (BANK 1), P0161 (BANK 2) HO2S2 HEATER (REAR)

Wiring Diagram

EC-287

BANK 2

NHEC0167S02

MEC415D

SEF660XD

DTC P0141 (BANK 1), P0161 (BANK 2) HO2S2 HEATER (REAR)

Wiring Diagram (Cont’d)

EC-288

Diagnostic Procedure

NHEC0168

1

CHECK HO2S2 (REAR) POWER SUPPLY CIRCUIT

1. Turn ignition switch “OFF”.
2. Check heated oxygen sensor 2 (rear) harness protector color.

SEC021C

3. Disconnect corresponding heated oxygen sensor 2 (rear) harness connector.

SEF467WB

4. Turn ignition switch “ON”.
5. Check voltage between HO2S2 (rear) terminal 3 and ground.

SEF314X

OK or NG

OK

©

GO TO 3.

NG

©

GO TO 2.

2

DETECT MALFUNCTIONING PART

Check the following.

I

Harness connectors M46, F44

I

Fuse block (J/B) connector M19

I

15A fuse

I

Harness for open or short between heated oxygen sensor 2 (rear) and fuse

©

Repair harness or connectors.

GI

MA

EM

LC

FE

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

DTC P0141 (BANK 1), P0161 (BANK 2) HO2S2 HEATER (REAR)

Diagnostic Procedure

EC-289

3

CHECK HO2S2 (REAR) GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal and HO2S2 (rear) terminal as follows.

Refer to Wiring Diagram.

MTBL0608

Continuity should exist.

4. 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 HEATED OXYGEN SENSOR 2 HEATER (REAR)

Check the resistance between HO2S2 (rear) terminals as follows.

SEF315X

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.

OK or NG

OK

©

GO TO 6.

NG

©

GO TO 5.

5

REPLACE HEATED OXYGEN SENSOR 2 (REAR)

Check heated oxygen sensor 2 (rear) harness protector color.

SEC021C

CAUTION:

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.

©

Replace malfunctioning heated oxygen sensor 2 (rear).

DTC P0141 (BANK 1), P0161 (BANK 2) HO2S2 HEATER (REAR)

Diagnostic Procedure (Cont’d)

EC-290