Nissan Pathfinder (2006 year). Manual - part 164

 

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Nissan Pathfinder (2006 year). Manual - part 164

 

 

DTC P0037, P0038, P0057, P0058 HO2S2 HEATER

EC-171

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EC

2006 Pathfinder

DTC Confirmation Procedure

UBS00K54

NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is between 10.5V and 16V at
idle.

 WITH CONSULT-II

1.

Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.

2.

Start engine and warm it up to the normal operating tempera-
ture.

3.

Turn ignition switch OFF and wait at least 10 seconds.

4.

Start the engine and keep the engine speed between 3,500 rpm
and 4,000 rpm for at least 1 minute under no load.

5.

Let engine idle for 1 minute.

6.

If 1st trip DTC is detected, go to 

EC-175, "Diagnostic Procedure"

.

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

SEF176Y

EC-172

DTC P0037, P0038, P0057, P0058 HO2S2 HEATER

2006 Pathfinder

Wiring Diagram

UBS00K55

BANK 1

BBWA2364E

DTC P0037, P0038, P0057, P0058 HO2S2 HEATER

EC-173

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EC

2006 Pathfinder

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)

25

P

Heated oxygen sensor 2 
heater (Bank 1)

[Engine is running]

●

Engine speed: Below 3,600 rpm after the 
following conditions are met

–

Engine: After warming up

–

Keeping the engine speed between 3,500 
and 4,000 rpm for 1 minute and at idle for 1 
minute under no load

0 - 1.0V

[Ignition switch: ON]

●

Engine: Stopped

[Engine is running]

●

Engine speed: Above 3,600 rpm

BATTERY VOLTAGE
(11 - 14V)

74

W

Heated oxygen sensor 2 
(Bank 1)

[Engine is running]

●

Revving engine from idle to 3,000 rpm 
quickly after the following conditions are met

–

Engine: After warming up

–

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

78

GR

Sensor ground
(Heated oxygen sensor 2)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

EC-174

DTC P0037, P0038, P0057, P0058 HO2S2 HEATER

2006 Pathfinder

BANK 2

BBWA2365E

DTC P0037, P0038, P0057, P0058 HO2S2 HEATER

EC-175

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EC

2006 Pathfinder

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

UBS00K56

1. 

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

Loosen and retighten three ground screws on the body. Refer to 

EC-151, "Ground Inspection"

 .

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

6

R

Heated oxygen sensor 2 
heater (Bank 2)

[Engine is running]

●

Engine speed: Below 3,600 rpm after the 
following conditions are met.

–

Engine: After warming up

–

Keeping the engine speed between 3,500 
and 4,000 rpm for 1 minute and at idle for 1 
minute under no load

0 - 1.0V

[Ignition switch: ON]

●

Engine: Stopped

[Engine is running]

●

Engine speed: Above 3,600 rpm

BATTERY VOLTAGE
(11 - 14V)

55

G

Heated oxygen sensor 2 
(Bank 2)

[Engine is running]

●

Revving engine from idle to 3,000 rpm 
quickly after the following conditions are met

–

Engine: After warming up

–

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

78

GR

Sensor ground
(Heated oxygen sensor 2)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

BBIA0539E

EC-176

DTC P0037, P0038, P0057, P0058 HO2S2 HEATER

2006 Pathfinder

2. 

CHECK HO2S2 POWER SUPPLY CIRCUIT

1.

Disconnect heated oxygen sensor 2 harness connector.

2.

Turn ignition switch ON.

3.

Check voltage between HO2S2 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 E5, F14

●

IPDM E/R harness connector E119

●

10A fuse

●

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

>> Repair harness or connectors.

Voltage: Battery voltage

BBIA0540E

PBIB0112E

DTC P0037, P0038, P0057, P0058 HO2S2 HEATER

EC-177

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2006 Pathfinder

4. 

CHECK HO2S2 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 HO2S2 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.

5. 

CHECK HEATED OXYGEN SENSOR 2 HEATER

Refer to 

EC-177, "Component Inspection"

 .

OK or NG

OK

>> GO TO 6.

NG

>> Replace malfunctioning heated oxygen sensor 2.

6. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-144, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Component Inspection

UBS00K57

HEATED OXYGEN SENSOR 2 HEATER

1.

Check resistance between HO2S2 terminals as follows.

2.

If NG, replace heated oxygen sensor 2.

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.

DTC

Terminals

Bank

ECM

Sensor

P0037, P0038

25

2

1

P0057, P0058

6

2

2

Continuity should exist.

Terminal No.

Resistance

2 and 3

9.9 - 13.3 

Ω

 at 25

°

C (77

°

F)

1 and 2, 3, 4

∞

 

Ω

(Continuity should not exist)

4 and 1, 2, 3

SEF249Y

EC-178

DTC P0037, P0038, P0057, P0058 HO2S2 HEATER

2006 Pathfinder

Removal and Installation

UBS00K58

HEATED OXYGEN SENSOR 2

Refer to 

EM-22, "EXHAUST MANIFOLD AND THREE WAY CATALYST"

 .

 

 

 

 

 

 

 

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