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Nissan Frontier. Manual - part 391

HOW TO ERASE PERMANENT DTC

EC-135

< BASIC INSPECTION >

[QR25DE]

Work Procedure (Group B)

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NOTE:

Drive the vehicle according to only driving patterns indicating “INCMP” in driving patterns B and D on the

“PERMANENT DTC STATUS” screen.

CHECK DTC

Check DTC.
Is any DTC detected?

YES

>> Repair malfunction(s) and erase DTC.

• With CONSULT:

EC-58, "CONSULT Function"

• Without CONSULT:

EC-55, "On Board Diagnosis Function"

>> GO TO 2.

CHECK PERMANENT DTC

With CONSULT

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

4. Turn ignition switch ON.

5. Select “PERMANENT DTC STATUS” mode with CONSULT.

With GST

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

*1: When the same malfunction is de-

tected in two consecutive trips, MIL
will illuminate.

*2: After experiencing driving pattern B

and D, permanent DTC is erased.

*3: Indication does not change unless

the ignition switch is turned from ON
to OFF twice even after experiencing
driving pattern B or D.

JSBIA0414GB

EC-136

< BASIC INSPECTION >

[QR25DE]

HOW TO ERASE PERMANENT DTC

3. Turn ignition switch OFF and wait at least 10 seconds.

4. Turn ignition switch ON.

5. Select Service $0A with GST.
Is any permanent DTC detected?

YES

>> GO TO 3.

>> END

DRIVE DRIVING PATTERN B

CAUTION:

• Always drive at a safe speed.

• Never erase self-diagnosis results.

• If self-diagnosis results are erased during the trip of driving pattern B or D, the counter of driving

pattern B and D is reset.

With CONSULT

1. Start engine and warm it up to normal operating temperature.

2. Use “PERMANENT DTC WORK SUPPORT” mode with CONSULT to drive the vehicle according to driv-

ing pattern B. Refer to

EC-58, "CONSULT Function"

EC-52, "DIAGNOSIS DESCRIPTION : Driving Pat-

tern"

With GST

1. Start engine and warm it up to normal operating temperature.

2. Drive the vehicle according to driving pattern B. Refer to

EC-52, "DIAGNOSIS DESCRIPTION : Driving

Pattern"

>> GO TO 4.

CHECK PERMANENT DTC

With CONSULT

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

4. Turn ignition switch ON.

5. Select “PERMANENT DTC STATUS” mode with CONSULT.

With GST

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

4. Turn ignition switch ON.

5. Select Service $0A with GST.
Is any permanent DTC detected?

YES

>> GO TO 5.

>> END

DRIVE DRIVING PATTERN D

CAUTION:

• Always drive at a safe speed.

• Never erase self-diagnosis results.

• If self-diagnosis results are erased during the trip of driving pattern B or D, the counter of driving

pattern B and D is reset.

Drive the vehicle according to driving pattern D. Refer to

EC-52, "DIAGNOSIS DESCRIPTION : Driving Pat-

tern"

>> GO TO 6.

CHECK PERMANENT DTC

With CONSULT

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

HOW TO ERASE PERMANENT DTC

EC-137

< BASIC INSPECTION >

[QR25DE]

4. Turn ignition switch ON.

5. Select “PERMANENT DTC STATUS” mode with CONSULT.

With GST

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

4. Turn ignition switch ON.

5. Select Service $0A with GST.
Is any permanent DTC detected?

YES

>> GO TO 1.

>> END

EC-138

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

DTC/CIRCUIT DIAGNOSIS

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

Description

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The specification (SP) value indicates the tolerance of the value that is displayed in “DATA MONITOR (SPEC)”

mode of CONSULT during normal operation of the Engine Control System. When the value in “DATAMONI-

TOR (SPEC)” mode is within the SP value, the Engine Control System is confirmed OK. When the value in

“DATA MONITOR (SPEC)” mode is NOT within the SP value, the Engine Control System may have one or

more malfunctions.

The SP value is used to detect malfunctions that may affect the Engine Control System, but will not illuminate

the MIL.

The SP value will be displayed for the following three items:

• B/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board correc-

tion)

• A/F ALPHA-B1 (The mean value of air-fuel ratio feedback correction factor per cycle)

• MAS A/F SE-B1 (The signal voltage of the mass air flow sensor)

Testing Condition

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• Vehicle driven distance: More than 5,000 km (3,107 miles)
• Barometric pressure: 98.3 - 104.3 kPa (1.003 - 1.064 kg/cm

, 14.25 - 15.12 psi)

• Atmospheric temperature: 20 - 30

°C (68 - 86°F)

• Engine coolant temperature: 75 - 95

°C (167 - 203°F)

• Engine speed: Idle

• Transmission: Warmed-up

- A/T models: After the engine is warmed up to normal operating temperature, drive vehicle until “ATF TEMP

SE 1” (A/T fluid temperature sensor signal) indicates more than 60

°C (140°F).

- M/T models: After the engine is warmed up to normal operating temperature, drive vehicle for 5 minutes.

• Electrical load: Not applied

- Air conditioner switch, lighting switch are OFF. Steering wheel is straight ahead.

Inspection Procedure

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NOTE:

Perform “DATA MONITOR (SPEC)” mode in maximum scale display.
1. Perform

EC-117, "Basic Inspection"

2. Confirm that the testing conditions indicated above are met.
3. Select “B/FUEL SCHDL”, “A/F ALPHA-B1” and“MAS A/F SE-B1” in “DATA MONITOR (SPEC)” mode with

CONSULT.

4. Make sure that monitor items are within the SP value.
5. If NG, go to

EC-138, "Diagnosis Procedure"

Diagnosis Procedure

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OVERALL SEQUENCE

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