Nissan Pathfinder (2006 year). Manual - part 220

DTC P2A00, P2A03 A/F SENSOR 1

EC-619

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2006 Pathfinder

11. 

REPLACE A/F SENSOR 1

Replace A/F sensor 1.

CAUTION:

●

Discard any A/F 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.

●

Before installing new A/F sensor, clean exhaust system threads using Heated Oxygen Sensor
Thread Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.

>> GO TO 12.

12. 

CONFIRM A/F ADJUSTMENT DATA

1.

Turn ignition switch ON.

2.

Select “A/F ADJ-B1” and “A/F ADJ-B2” in “DATA MONITOR”
mode with CONSULT-II.

3.

Make sure that “0” is displayed on CONSULT-II screen.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 13.

PBIB3202E

EC-620

DTC P2A00, P2A03 A/F SENSOR 1

2006 Pathfinder

13. 

CREAR A/F ADJUSTMENT DATA

 With CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CONSULT-II.

3.

Clear the self-learning control coefficient by touching “CLEAR”.

 Without CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Turn ignition switch OFF.

3.

Disconnect mass air flow sensor harness connector.

4.

Restart engine and let it idle for at least 5 seconds.

5.

Stop engine and reconnect mass air flow sensor harness con-
nector.

6.

Make sure DTC P0102 is displayed.

7.

Erase the DTC memory. Refer to 

EC-60, "HOW TO ERASE

EMISSION-RELATED DIAGNOSTIC INFORMATION"

 .

8.

Make sure DTC P0000 is displayed.

>> GO TO 14.

14. 

CONFIRM A/F ADJUSTMENT DATA

1.

Turn ignition switch OFF and then ON.

2.

Select “A/F ADJ-B1” and “A/F ADJ-B2” in “DATA MONITOR”
mode with CONSULT-II.

3.

Make sure that “0” is displayed on CONSULT-II screen.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 13.

Removal and Installation

UBS00KEM

AIR FUEL RATIO (A/F) SENSOR 1

Refer to 

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

 . 

SEF968Y

BBIA0541E

PBIB3202E

ASCD BRAKE SWITCH

EC-621

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2006 Pathfinder

ASCD BRAKE SWITCH

PFP:25320

Component Description

UBS00KIP

When the brake pedal is depressed, ASCD brake switch is turned
OFF and stop lamp switch is turned ON. ECM detects the state of
the brake pedal by this input of two kinds (ON/OFF signal).
Refer to 

EC-29, "AUTOMATIC SPEED CONTROL DEVICE (ASCD)"

for the ASCD function.

CONSULT-II Reference Value in Data Monitor Mode

UBS00KIQ

Specification data are reference values.

BBIA0560E

MONITOR ITEM

CONDITION

SPECIFICATION

BRAKE SW 1
(ASCD brake switch)

●

Ignition switch: ON

Brake pedal: Fully released

ON

Brake pedal: Slightly depressed

OFF

BRAKE SW 2
(stop lamp switch)

●

Ignition switch: ON

Brake pedal: Fully released

OFF

Brake pedal: Slightly depressed

ON

EC-622

ASCD BRAKE SWITCH

2006 Pathfinder

Wiring Diagram

UBS00KIR

BBWA1990E

ASCD BRAKE SWITCH

EC-623

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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

UBS00KIS

1. 

CHECK OVERALL FUNCTION-I

 With CONSULT-II

1.

Turn ignition switch ON.

2.

Select “BRAKE SW1” in “DATA MONITOR” mode with CONSULT-II.

3.

Check “BRAKE SW1” indication under the following conditions.

 Without CONSULT-II

1.

Turn ignition switch ON.

2.

Check voltage between ECM terminal 108 and ground under the
following conditions.

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 3.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

101

LG

Stop lamp switch

[Ignition switch: OFF]

●

Brake pedal: Fully released

Approximately 0V

[Ignition switch: OFF]

●

Brake pedal: Slightly depressed

BATTERY VOLTAGE
(11 - 14V)

108

LG

ASCD brake switch

[Ignition switch: ON]

●

Brake pedal: Slightly depressed

Approximately 0V

[Ignition switch: ON]

●

Brake pedal: Fully released

BATTERY VOLTAGE
(11 - 14V)

CONDITION

INDICATION

When brake pedal: Slightly depressed

OFF

When brake pedal: Fully released

ON

SEC011D

CONDITION

VOLTAGE

When brake pedal: Slightly depressed

Approximately 0V

When brake pedal: Fully released

Battery voltage

MBIB0061E

EC-624

ASCD BRAKE SWITCH

2006 Pathfinder

2. 

CHECK OVERALL FUNCTION-II

 With CONSULT-II

Check “BRAKE SW2” indication in “DATA MONITOR” mode. 

 Without CONSULT-II

Check voltage between ECM terminal 101 and ground under the following conditions.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 7.

CONDITION

INDICATION

When brake pedal: Fully released

OFF

When brake pedal: Slightly depressed

ON

SEC013D

CONDITION

VOLTAGE

When brake pedal: Fully released

Approximately 0V

When brake pedal: Slightly depressed

Battery voltage

MBIB0060E

ASCD BRAKE SWITCH

EC-625

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2006 Pathfinder

3. 

CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ASCD brake switch harness connector.

3.

Turn ignition switch ON.

4.

Check voltage between ASCD brake switch terminal 1 and
ground with CONSULT-II or tester.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4. 

DETECT MALFUNCTIONING PART

Check the following.

●

Fuse block (J/B) connector E160

●

10A fuse

●

Harness for open or short between ASCD brake switch and fuse

>> Repair open circuit or short to ground in harness or connectors.

5. 

CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between ECM terminal 108 and ASCD brake switch terminal 2.
Refer to Wiring Diagram.

4.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 6.

NG

>> Repair open circuit or short to ground or short to power in harness or connectors.

6. 

CHECK ASCD BRAKE SWITCH

Refer to 

EC-627, "Component Inspection"

 .

OK or NG

OK

>> GO TO 11.

NG

>> Replace ASCD brake switch.

BBIA0560E

Voltage: Battery voltage

PBIB0857E

Continuity should exist.

EC-626

ASCD BRAKE SWITCH

2006 Pathfinder

7. 

CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect stop lamp switch harness connector.

3.

Check voltage between stop lamp switch terminal 1 and ground
with CONSULT -II or tester.

OK or NG

OK

>> GO TO 9.

NG

>> GO TO 8.

8. 

DETECT MALFUNCTIONING PART

Check the following.

●

Fuse block (J/B) connector E160

●

10A fuse

●

Harness for open or short between stop lamp switch and battery

>> Repair open circuit or short to ground or short to power in harness or connectors.

9. 

CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Disconnect ECM harness connector.

2.

Check harness continuity between ECM terminal 101 and stop lamp switch terminal 2.
Refer to Wiring Diagram.

3.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 10.

NG

>> Repair open circuit or short to ground or short to power in harness or connectors.

10. 

CHECK STOP LAMP SWITCH

Refer to 

EC-627, "Component Inspection"

 .

OK or NG

OK

>> GO TO 11.

NG

>> Replace stop lamp switch.

BBIA0560E

Voltage: Battery voltage

PBIB1184E

Continuity should exist.