Nissan Pathfinder (2005 year). Instruction — part 319
CAN SYSTEM (TYPE 7)
LAN-251
[CAN]
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LAN
2005 Pathfinder
7.
CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between harness connector E5 terminals 2 (L), 3
(P) and ground.
OK or NG
OK
>> GO TO 8.
NG
>> Repair harness between harness connector E5 and har-
ness connector E152.
8.
CHECK HARNESS FOR SHORT CIRCUIT
1.
Disconnect following connectors.
–
Front air control connector
–
Steering angle sensor connector
–
BCM connector
–
Combination meter connector
–
Transfer control unit connector
–
Harness connector M40
–
Harness connector M91
2.
Check continuity between data link connector M22 terminals 6
(L) and 14 (P).
OK or NG
OK
>> GO TO 9.
NG
>> Check the following harnesses. If any harness is dam-
aged, repair the harness.
●
Harness between data link connector and harness
connector M31
●
Harness between data link connector and front air
control
●
Harness between data link connector and steering angle sensor
●
Harness between data link connector and BCM
●
Harness between data link connector and combination meter
●
Harness between data link connector and transfer control unit
●
Harness between data link connector and harness connector M40
●
Harness between data link connector and harness connector M91
2 (L) – Ground
: Continuity should not exist.
3 (P) – Ground
: Continuity should not exist.
SKIB2817E
6 (L) – 14 (P)
: Continuity should not exist.
SKIA6868E
LAN-252
[CAN]
CAN SYSTEM (TYPE 7)
2005 Pathfinder
9.
CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between data link connector M22 terminals 6 (L),
14 (P) and ground.
OK or NG
OK
>> GO TO 10.
NG
>> Check the following harnesses. If any harness is dam-
aged, repair the harness.
●
Harness between data link connector and harness
connector M31
●
Harness between data link connector and front air control
●
Harness between data link connector and steering angle sensor
●
Harness between data link connector and BCM
●
Harness between data link connector and combination meter
●
Harness between data link connector and transfer control unit
●
Harness between data link connector and harness connector M40
●
Harness between data link connector and harness connector M91
10.
CHECK HARNESS FOR SHORT CIRCUIT
1.
Disconnect following connectors.
–
Driver seat control unit connector
–
Harness connector P1
2.
Check continuity between driver seat control unit harness con-
nector P2 terminals 3 (L) and 19 (P).
OK or NG
OK
>> GO TO 11.
NG
>> Repair harness between driver seat control unit and har-
ness connector P1.
11.
CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between driver seat control unit harness connector
P2 terminals 3 (L), 19 (P) and ground.
OK or NG
OK
>> GO TO 12.
NG
>> Repair harness between driver seat control unit and har-
ness connector P1.
6 (L) – Ground
: Continuity should not exist.
14 (P) – Ground
: Continuity should not exist.
PKIA9872E
3 (L) – 19 (P)
: Continuity should not exist.
PKIA6842E
3 (L) – Ground
: Continuity should not exist.
19 (P) – Ground
: Continuity should not exist.
SKIB2818E
CAN SYSTEM (TYPE 7)
LAN-253
[CAN]
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LAN
2005 Pathfinder
12.
CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between harness connector B37 terminals 15 (L)
and 14 (P).
OK or NG
OK
>> GO TO 13.
NG
>> Repair harness between harness connector B37 and
harness connector B69.
13.
CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between harness connector B37 terminals 15 (L),
14 (P) and ground.
OK or NG
OK
>> GO TO 14.
NG
>> Repair harness between harness connector B37 and
harness connector B69.
14.
CHECK HARNESS FOR SHORT CIRCUIT
1.
Disconnect ABS actuator and electric unit (control unit) connector and IPDM E/R connector.
2.
Check continuity between IPDM E/R harness connector E122
terminals 39 (L) and 40 (P).
OK or NG
OK
>> GO TO 15.
NG
>> Check the following harnesses. If any harness is dam-
aged, repair the harness.
●
Harness between IPDM E/R and ABS actuator and
electric unit (control unit)
●
Harness between IPDM E/R and harness connector
E26
15 (L) – 14 (P)
: Continuity should not exist.
SKIB2819E
15 (L) – Ground
: Continuity should not exist.
14 (P) – Ground
: Continuity should not exist.
SKIB2820E
39 (L) – 40 (P)
: Continuity should not exist.
PKIA8141E
LAN-254
[CAN]
CAN SYSTEM (TYPE 7)
2005 Pathfinder
15.
CHECK HARNESS FOR SHORT CIRCUIT
Check continuity between IPDM E/R harness connector E122 termi-
nals 39 (L), 40 (P) and ground.
OK or NG
OK
>> GO TO 16.
NG
>> Check the following harnesses. If any harness is dam-
aged, repair the harness.
●
Harness between IPDM E/R and ABS actuator and
electric unit (control unit)
●
Harness between IPDM E/R and harness connector E26
16.
ECM AND IPDM E/R INTERNAL CIRCUIT INSPECTION
1.
Remove ECM and IPDM E/R from vehicle.
2.
Check resistance between ECM terminals 94 and 86.
3.
Check resistance between IPDM E/R terminals 39 and 40.
OK or NG
OK
>> GO TO 17.
NG
>> Replace ECM and/or IPDM E/R.
17.
CHECK SYMPTOM
1.
Fill in described symptoms on the column “Symptom” in the check sheet.
2.
Connect all connectors, and then make sure that the symptom is reproduced.
OK or NG
OK
>> GO TO 18.
NG
>> Refer to
LAN-15, "Example of Filling in Check Sheet When Initial Conditions Are Not Reproduced"
.
39 (L) – Ground
: Continuity should not exist.
40 (P) – Ground
: Continuity should not exist.
SKIB2821E
94 – 86
: Approx. 108 - 132
Ω
39 – 40
: Approx. 108 - 132
Ω
LKIA0037E
CAN SYSTEM (TYPE 7)
LAN-255
[CAN]
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LAN
2005 Pathfinder
18.
UNIT REPRODUCIBILITY INSPECTION
Perform the following procedure for each unit, and then perform reproducibility test.
1.
Turn ignition switch OFF.
2.
Disconnect the battery cable from the negative terminal.
3.
Disconnect the unit connector.
4.
Connect the battery cable to the negative terminal.
5.
Make sure that the symptom filled in the “Symptom” of the check sheet is reproduced. (Do not confuse it
with the symptom related to removed unit.)
6.
Make sure that the same symptom is reproduced.
–
TCM
–
Front air control
–
Steering angle sensor
–
BCM
–
Combination meter
–
Transfer control unit
–
Driver seat control unit
–
ABS actuator and electric unit (control unit)
–
ECM
–
IPDM E/R
Inspection results
Reproduced>>Install removed unit, and then check the other unit.
Not reproduced>>Replace removed unit.
IPDM E/R Ignition Relay Circuit Inspection
UKS003DD
Check the following. If no malfunction is found, replace the IPDM E/R.
●
IPDM E/R power supply circuit. Refer to
PG-26, "IPDM E/R Power/Ground Circuit Inspection"
.
●
Ignition power supply circuit. Refer to
PG-14, "IGNITION POWER SUPPLY — IGNITION SW. IN ON
.
LAN-256
[CAN]
CAN SYSTEM (TYPE 8)
2005 Pathfinder
CAN SYSTEM (TYPE 8)
PFP:23710
System Description
UKS003B5
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
Component Parts and Harness Connector Location
UKS003B6
BKIA0107E
CAN SYSTEM (TYPE 8)
LAN-257
[CAN]
C
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LAN
2005 Pathfinder
Schematic
UKS003B7
BKWA0366E
LAN-258
[CAN]
CAN SYSTEM (TYPE 8)
2005 Pathfinder
Wiring Diagram - CAN -
UKS003B8
BKWA0354E
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