Nissan Frontier D22. Manual - part 398

 

  Index      Nissan     Nissan Frontier D22 Pickup (1998-2004 year) - Service and Repair Manual

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  396  397  398  399   ..

 

 

Nissan Frontier D22. Manual - part 398

 

 

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

EC-695

[VG33E]

C

D

E

F

G

H

I

J

K

L

M

A

EC

LEC090A

EC-696

[VG33E]

TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT

TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT

PFP:00006

Description

UBS00DFI

Intermittent incidents (I/I) may occur. In many cases, the malfunction resolves itself (the part or circuit function
returns to normal without intervention). It is important to realize that the symptoms described in the customer's
complaint often do not recur on (1st trip) DTC visits. Realize also that the most frequent cause of I/I occur-
rences is poor electrical connections. Because of this, the conditions under which the incident occurred may
not be clear. Therefore, circuit checks made as part of the standard diagnostic procedure may not indicate the
specific malfunctioning area.

Common I/I Report Situations

Diagnostic Procedure

UBS00DFJ

1. 

INSPECTION START

Erase (1st trip) DTCs. Refer to 

EC-632, "HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMA-

TION"

 .

>> GO TO 2.

2. 

CHECK GROUND TERMINALS

Check ground terminals for corroding or loose connection.
Refer to 

GI-25, "How to Perform Efficient Diagnosis for an Electrical Incident"

 .

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace.

3. 

SEARCH FOR ELECTRICAL INCIDENT

Perform 

GI-25, "How to Perform Efficient Diagnosis for an Electrical Incident"

 .

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace.

4. 

CHECK CONNECTOR TERMINALS

Refer to 

GI-22, "How to Check Terminal"

 .

OK or NG

OK

>> INSPECTION END.

NG

>> Repair or replace connector.

STEP in Work Flow

Situation

II

The CONSULT-II is used. The SELF-DIAG RESULTS screen shows time data other than [0] or [1t].

III

The symptom described by the customer does not recur.

IV

(1st trip) DTC does not appear during the DTC Confirmation Procedure.

VI

The Diagnostic Procedure for PXXXX does not indicate the malfunctioning area.

POWER SUPPLY CIRCUIT FOR ECM

EC-697

[VG33E]

C

D

E

F

G

H

I

J

K

L

M

A

EC

POWER SUPPLY CIRCUIT FOR ECM

PFP:24110

Wiring Diagram

UBS00DFK

BBWA0465E

EC-698

[VG33E]

POWER SUPPLY CIRCUIT FOR ECM

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 the ECM terminals, such as the ground.

Diagnostic Procedure

UBS00DFL

1. 

INSPECTION START

Start engine.
Is engine running?

Yes or No

Yes

>> GO TO 6.

No

>> GO TO 2.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM CONDITION

DATA 

(DC 

Voltage)

4

OR/B

ECM relay
(Self-shutoff)

[Engine is running]
[Ignition switch: OFF]

For a few seconds after turning ignition switch OFF

0 - 1.5V

[Ignition switch: OFF]

A few seconds passed after turning ignition switch 
OFF

BATTERY VOLTAGE
(11 - 14V)

10

B/R

ECM ground

[Engine is running]

Idle speed

Engine ground

19

B/R

ECM ground

[Engine is running]

Idle speed

Engine ground

24

W/L

Ignition switch

[Ignition switch: OFF]

0V

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

25

B/Y

ECM ground

[Engine is running]

Idle speed

Engine ground

32

B/Y

ECM ground

[Engine is running]

Idle speed

Engine ground

67

B/P

Power supply for ECM

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

72

B/P

80

SB

Power supply
(Back-up)

[Ignition switch: OFF]

BATTERY VOLTAGE
(11 - 14V)

116

B/R

ECM ground

[Engine is running]

Idle speed

Engine ground

117

B/P

Current return

[Engine is running]

Idle speed

BATTERY VOLTAGE
(11 - 14V)

124

B/R

ECM ground

[Engine is running]

Idle speed

Engine ground

 

 

 

 

 

 

 

Content   ..  396  397  398  399   ..