Infiniti Q45. Manual — part 379
POWER SUPPLY AND GROUND CIRCUIT
EC-155
C
D
E
F
G
H
I
J
K
L
M
A
EC
For detailed ground distribution information, refer to
Component Inspection
NBS001RL
ECM RELAY
1.
Apply 12V direct current between ECM relay terminals 1 and 2.
2.
Check continuity between relay terminals 3 and 5, 6 and 7.
3.
If NG, replace ECM relay.
PBIB1870E
Condition
Continuity
12V direct current supply between
terminals 1 and 2
Yes
OFF
No
PBIB0077E
EC-156
DTC U1000, U1001 CAN COMMUNICATION LINE
DTC U1000, U1001 CAN COMMUNICATION LINE
PFP:23710
Description
NBS001RM
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.
On Board Diagnosis Logic
NBS001RN
*1: This self-diagnosis has the one trip detection logic.
*2: The MIL will not light up for this diagnosis.
DTC Confirmation Procedure
NBS001RO
1.
Turn ignition switch ON and wait at least 3 seconds.
2.
Select “DATA MONITOR” mode with CONSULT-II.
3.
If 1st trip DTC is detected, go to
EC-158, "Diagnostic Procedure"
.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
U1000*
1
1000*
1
CAN communication line
●
ECM cannot communicate to other control units.
●
ECM cannot communicate for more than the
specified time.
●
Harness or connectors
(CAN communication line is open or
shorted)
U1001*
2
1001*
2
DTC U1000, U1001 CAN COMMUNICATION LINE
EC-157
C
D
E
F
G
H
I
J
K
L
M
A
EC
Wiring Diagram
NBS001RP
TBWT0698E
EC-158
DTC U1000, U1001 CAN COMMUNICATION LINE
Diagnostic Procedure
NBS001RQ
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