Nissan Frontier D40. Manual - part 538

P2A00, P2A03 A/F SENSOR 1

EC-843

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[VQ40DE]

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2.

Check voltage between A/F sensor 1 terminal 4 and ground with
CONSULT-III or tester.

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 7.

7.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E2, F32
• IPDM E/R connector E119
• 15 A fuse (No.54)
• Harness for open or short between A/F sensor 1 and fuse

>> Repair or replace harness or connectors.

8.

CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between A/F sensor 1 terminal and ECM terminal as follows.
Refer to Wiring Diagram.

4.

Check harness continuity between the following terminals and ground.
Refer to Wiring Diagram.

5.

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

OK or NG

OK

>> GO TO 9.

NG

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

9.

CHECK A/F SENSOR 1 HEATER

Refer to 

EC-557, "Component Inspection"

.

OK or NG

OK

>> GO TO 10.

NG

>> GO TO 11.

Voltage: Battery voltage

PBIB3308E

A/F sensor 1 terminal

ECM terminal

Bank1

1

35

2

56

Bank 2

1

16

2

75

Continuity should exist.

Bank 1

Bank 2

A/F sensor 1 terminal

ECM terminal

A/F sensor 1 terminal

ECM terminal

1

35

1

16

2

56

2

75

Continuity should not exist.

EC-844

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[VQ40DE]

P2A00, P2A03 A/F SENSOR 1

10.

CHECK INTERMITTENT INCIDENT

Perform 

GI-46, "Intermittent Incident"

.

OK or NG

 OK

>> GO TO 11.

NG

>> Repair or replace.

11.

REPLACE A/F SENSOR 1

Replace malfunctioning 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-III.

3.

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

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 13.

13.

CREAR A/F ADJUSTMENT DATA

 With CONSULT-III

1.

Start engine and warm it up to normal operating temperature.

2.

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

3.

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

 Without CONSULT-III

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-501, "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-III.

3.

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

OK or NG

OK

>> INSPECTION END

BBIA0541E

ASCD BRAKE SWITCH

EC-845

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ASCD BRAKE SWITCH

Component Description

INFOID:0000000005273866

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 two types of input (ON/OFF signal).
Refer to 

EC-489, "System Description"

 for the ASCD function.

Diagnosis Procedure

INFOID:0000000005273867

A/T MODELS

1.

CHECK OVERALL FUNCTION-I

 With CONSULT-III

1.

Turn ignition switch ON.

2.

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

3.

Check “BRAKE SW1” indication under the following conditions.

 Without CONSULT-III

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.

2.

CHECK OVERALL FUNCTION-II

 With CONSULT-III

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

 Without CONSULT-III

BBIA0560E

CONDITION

INDICATION

Brake pedal: Slightly depressed

OFF

Brake pedal: Fully released

ON

CONDITION

VOLTAGE

Brake pedal: Slightly depressed

Approximately 0V

Brake pedal: Fully released

Battery voltage

MBIB0061E

CONDITION

INDICATION

Brake pedal: Fully released

OFF

Brake pedal: Slightly depressed

ON

EC-846

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[VQ40DE]

ASCD BRAKE SWITCH

Check voltage between ECM terminal 101 and ground under the fol-
lowing conditions.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 7.

3.

CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ASCD brake switch (1) harness connector.

-

Stop lamp switch (2)

3.

Turn ignition switch ON.

4.

Check voltage between ASCD brake switch terminal 1 and
ground with CONSULT-III 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
• 10 A fuse (No.12)
• 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.

CONDITION

VOLTAGE

Brake pedal: Fully released

Approximately 0V

Brake pedal: Slightly depressed

Battery voltage

MBIB0060E

MBIB1214E

Voltage: Battery voltage

PBIB0857E

Continuity should exist.