Nissan Pathfinder. Manual — part 788
LAN
U1000 CAN COMM CIRCUIT
LAN-105
< DTC/CIRCUIT DIAGNOSIS >
[CAN GATEWAY]
C
D
E
F
G
H
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J
K
L
B
A
O
P
N
DTC/CIRCUIT DIAGNOSIS
U1000 CAN COMM CIRCUIT
Description
INFOID:0000000009174993
CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicle is equipped with many electronic control unit, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with two communication lines (CAN-H and CAN-L) allowing a high rate of information transmission with less
wiring. Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. Refer to
LAN-36, "CAN COMMUNICATION SYSTEM : CAN Communica-
DTC Logic
INFOID:0000000009174994
DTC DETECTION LOGIC
Diagnosis Procedure
INFOID:0000000009174995
1.
PERFORM SELF DIAGNOSTIC
1. Turn the ignition switch ON and wait for 2 seconds or more.
2. Check “Self Diagnostic Result”.
Is “U1000: CAN COMM CIRCUIT” displayed?
YES
>> Refer to
LAN-20, "Trouble Diagnosis Flow Chart"
NO
>> Refer to
GI-49, "Intermittent Incident"
.
DTC
CONSULT display descrip-
tion
DTC Detection Condition
Possible cause
U1000
CAN COMM CIRCUIT
When CAN gateway cannot communicate
CAN communication signal continuously for 2
seconds or more.
CAN communication system
LAN-106
< DTC/CIRCUIT DIAGNOSIS >
[CAN GATEWAY]
U1010 CONTROL UNIT (CAN)
U1010 CONTROL UNIT (CAN)
Description
INFOID:0000000009174996
CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicle is equipped with many electronic control unit, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with two communication lines (CAN-H and CAN-L) allowing a high rate of information transmission with less
wiring. Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. Refer to
LAN-36, "CAN COMMUNICATION SYSTEM : CAN Communica-
DTC Logic
INFOID:0000000009174997
DTC DETECTION LOGIC
Diagnosis Procedure
INFOID:0000000009174998
1.
REPLACE CAN GATEWAY
When DTC “U1010: CONTROL UNIT(CAN)” is detected, replace CAN gateway.
>> Replace CAN gateway. Refer to
LAN-109, "Removal and Installation"
DTC
CONSULT display
description
DTC Detection Condition
Possible cause
U1010
CONTROL UNIT(CAN)
When an error is detected during the initial di-
agnosis for CAN controller of CAN gateway.
CAN gateway
LAN
B2600 CONFIG ERROR
LAN-107
< DTC/CIRCUIT DIAGNOSIS >
[CAN GATEWAY]
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B2600 CONFIG ERROR
Description
INFOID:0000000009174999
The CAN gateway requires initial settings to judge necessary information, according to a vehicle specification.
DTC Logic
INFOID:0000000009175000
DTC DETECTION LOGIC
Diagnosis Procedure
INFOID:0000000009175001
1.
REPLACE CAN GATEWAY
When DTC “B2600: CONFIG ERROR” is detected, replace CAN gateway.
>> Replace CAN gateway. Refer to
LAN-109, "Removal and Installation"
.
DTC
CONSULT display
description
DTC Detection Condition
Probable cause
B2600
CONFIG ERROR
WRONG DATA
When errors are detected in the configuration
data stored in the CAN gateway.
CAN gateway
CONFIG ERROR
NOT CONFIGURED
When no data are stored in the CAN gateway.
LAN-108
< DTC/CIRCUIT DIAGNOSIS >
[CAN GATEWAY]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
Diagnosis Procedure
INFOID:0000000009175002
1.
CHECK FUSE
Check that the following fuse are not blown.
Is the fuse fusing?
YES
>> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
NO
>> GO TO 2.
2.
CHECK POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect the connector of CAN gateway.
3. Check voltage between CAN gateway harness connector and ground.
Is the measurement value normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK GROUND CIRCUIT
Check continuity between CAN gateway harness connector and ground.
Does continuity exist?
YES
>> INSPECTION END
NO
>> Repair harness or connector.
Signal name
Fuse No.
Battery power supply
25
Ignition power supply
31
Terminals
Condition
Standard voltage
Reference
voltage
(Approx.)
(+)
(
−)
CAN gateway
Ground
Ignition
switch
Connector
Terminal
M5
3
OFF
6 - 16 V
Battery
voltage
9
ON
4.5 - 16 V
Battery
voltage
CAN gateway
Ground
Continuity
Connector
Terminal
M5
5
Existed
11
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