Nissan Pathfinder (2005 year). Instruction — part 163
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-155
C
D
E
F
G
H
I
J
K
L
M
A
EC
2005 Pathfinder
20.
CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”, AND “B/FUEL SCHDL”
Select “A/F ALPHA-B1”, “A/F ALPHA-B2”, and “B/FUEL SCHDL” in “DATA MONITOR (SPEC)” mode, and
make sure that the each indication is within the SP value.
OK or NG
OK
>> INSPECTION END
NG (“B/FUEL SCHDL” is more, “A/F ALPHA-B1”, “A/F ALPHA-B2” are less than the SP value)>>GO TO 21.
21.
DISCONNECT AND RECONNECT MASS AIR FLOW SENSOR HARNESS CONNECTOR
1.
Stop the engine.
2.
Disconnect mass air flow sensor harness connector. Check pin terminal and connector for damage and
then reconnect it again.
>> GO TO 22.
22.
CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”
1.
Start engine.
2.
Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “DATA MONITOR (SPEC)” mode, and make sure that the
each indication is within the SP value.
OK or NG
OK
>> 1. Detect malfunctioning part of mass air flow sensor circuit and repair it. Refer to
.
2. GO TO 29.
NG
>> GO TO 23.
23.
CHECK “MAS A/F SE-B1”
Select “MAS A/F SE-B1” in “DATA MONITOR (SPEC)” mode, and
make sure that the indication is within the SP value.
OK or NG
OK
>> GO TO 24.
NG (More than the SP value)>>Replace mass air flow sensor, and
then GO TO 29.
24.
REPLACE ECM
1.
Replace ECM.
2.
Perform initialization of NVIS(NATS) system and registration of all NVIS(NATS) ignition key IDs. Refer to
BL-101, "ECM Re-communicating Function"
.
3.
Perform
.
4.
Perform
EC-88, "Accelerator Pedal Released Position Learning"
.
5.
Perform
EC-88, "Throttle Valve Closed Position Learning"
.
6.
Perform
EC-89, "Idle Air Volume Learning"
.
>> GO TO 29.
PBIB2370E
EC-156
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
2005 Pathfinder
25.
CHECK INTAKE SYSTEM
Check for the cause of uneven air flow through mass air flow sensor. Refer to the following.
●
Crushed air ducts
●
Malfunctioning seal of air cleaner element
●
Uneven dirt of air cleaner element
●
Improper specification of intake air system
OK or NG
OK
>> GO TO 27.
NG
>> Repair or replace malfunctioning part, and then GO TO 26.
26.
CHECK “B/FUEL SCHDL”
Select “B/FUEL SCHDL” in “DATA MONITOR (SPEC)” mode, and make sure that the indication is within the
SP value.
OK or NG
OK
>> INSPECTION END
NG (Less than the SP value)>>GO TO 27.
27.
CHECK “MAS A/F SE-B1”
Select “MAS A/F SE-B1” in “DATA MONITOR (SPEC)” mode, and
make sure that the indication is within the SP value.
OK or NG
OK
>> GO TO 28.
NG (Less than the SP value)>>Replace mass air flow sensor, and
then GO TO 30.
28.
CHECK INTAKE SYSTEM
Check for the cause of air leak after the mass air flow sensor. Refer to the following.
●
Disconnection, looseness, and cracks in air duct
●
Looseness of oil filler cap
●
Disconnection of oil level gauge
●
Open stuck, breakage, hose disconnection, or cracks of PCV valve
●
Disconnection or cracks of EVAP purge hose, open stuck of EVAP canister purge volume control solenoid
valve
●
Malfunctioning seal of rocker cover gasket
●
Disconnection, looseness, or cracks of hoses, such as vacuum hose, connecting to intake air system
parts
●
Malfunctioning seal of intake air system, etc.
>> GO TO 30.
29.
CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”, AND “B/FUEL SCHDL”
Select “A/F ALPHA-B1”, “A/F ALPHA-B2”, and “B/FUEL SCHDL” in “DATA MONITOR (SPEC)” mode, and
make sure that the each indication is within the SP value.
OK or NG
OK
>> INSPECTION END
NG
>> Detect malfunctioning part according to
EC-102, "Symptom Matrix Chart"
.
PBIB2370E
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-157
C
D
E
F
G
H
I
J
K
L
M
A
EC
2005 Pathfinder
30.
CHECK “B/FUEL SCHDL”
Select “B/FUEL SCHDL” in “DATA MONITOR (SPEC)” mode, and then make sure that the indication is within
the SP value.
OK or NG
OK
>> INSPECTION END
NG
>> Detect malfunctioning part according to
EC-102, "Symptom Matrix Chart"
.
EC-158
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT
2005 Pathfinder
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT
PFP:00006
Description
UBS00K4K
Intermittent incidents 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 intermittent
incidents occurrences 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 Intermittent Incidents Report Situations
Diagnostic Procedure
UBS00K4L
1.
INSPECTION START
Erase (1st trip) DTCs. Refer to
EC-61, "HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMA-
.
>> GO TO 2.
2.
CHECK GROUND TERMINALS
Check ground terminals for corroding or loose connection.
Refer to
.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace.
3.
SEARCH FOR ELECTRICAL INCIDENT
Perform
GI-27, "How to Perform Efficient Diagnosis for an Electrical Incident"
, "INCIDENT SIMULATION
TESTS".
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace.
4.
CHECK CONNECTOR TERMINALS
Refer to
GI-24, "How to Check Terminal"
, "HOW TO PROBE CONNECTORS", “How to Check Enlarged Con-
tact Spring of Terminal”.
OK or NG
OK
>> INSPECTION END
NG
>> Repair or replace connector.
STEP in Work Flow
Situation
2
The CONSULT-II is used. The SELF-DIAG RESULTS screen shows time data other than [0] or [1t].
3 or 4
The symptom described by the customer does not recur.
5
(1st trip) DTC does not appear during the DTC Confirmation Procedure.
10
The Diagnostic Procedure for PXXXX does not indicate the malfunctioning area.
POWER SUPPLY AND GROUND CIRCUIT
EC-159
C
D
E
F
G
H
I
J
K
L
M
A
EC
2005 Pathfinder
POWER SUPPLY AND GROUND CIRCUIT
PFP:24110
Wiring Diagram
UBS00K4M
BBWA1727E
EC-160
POWER SUPPLY AND GROUND CIRCUIT
2005 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)
109
W/R
Ignition switch
[Ignition switch: OFF]
0V
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
111
BR
ECM relay
(Self shut-off)
[Engine is running]
[Ignition switch: OFF]
●
For a few seconds after turning ignition
switch OFF
0 - 1.5V
[Ignition switch: OFF]
●
More than a few seconds after turning igni-
tion switch OFF
BATTERY VOLTAGE
(11 - 14V)
119
120
R
P
Power supply for ECM
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
POWER SUPPLY AND GROUND CIRCUIT
EC-161
C
D
E
F
G
H
I
J
K
L
M
A
EC
2005 Pathfinder
BBWA1728E
EC-162
POWER SUPPLY AND GROUND CIRCUIT
2005 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
UBS00K4N
1.
INSPECTION START
Start engine.
Is engine running?
Yes or No
Yes
>> GO TO 8.
No
>> GO TO 2.
2.
CHECK ECM POWER SUPPLY CIRCUIT-I
1.
Turn ignition switch OFF and then ON.
2.
Check voltage between ECM terminal 109 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 M31, E152
●
Fuse block (J/B) connector M4
●
10A fuse
●
Harness for open or short between ECM and fuse
>> Repair harness or connectors.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
1
BR
ECM ground
[Engine is running]
●
Idle speed
Body ground
115
116
B
GR
ECM ground
[Engine is running]
●
Idle speed
Body ground
Voltage: Battery voltage
MBIB0015E
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст