Infiniti I35 (A33). Manual — part 205
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electronically controlled circuit. A poor or corroded ground can eas-
ily affect the circuit. Even when the ground connection looks clean,
there can be a thin film of rust on the surface.
When inspecting a ground connection follow these rules:
1)
Remove the ground bolt or screw.
2)
Inspect all mating surfaces for tarnish, dirt, rust, etc.
3)
Clean as required to assure good contact.
4)
Reinstall bolt or screw securely.
5)
Inspect for “add-on” accessories which may be interfering with
the ground circuit.
6)
If several wires are crimped into one ground eyelet terminal,
check for proper crimps. Make sure all of the wires are clean,
securely fastened and providing a good ground path. If multiple
wires are cased in one eyelet make sure no ground wires have
excess wire insulation.
For detailed ground distribution information, refer to “Ground
Distribution”, EL-20.
PBIB1870E
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
POWER SUPPLY AND GROUND CIRCUIT
Ground Inspection (Cont’d)
EC-161
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Description
NHEC1245
CAN (Controller Area Network) is a serial communication line for
real time application. It is an on-vehicle multiplex communication
line with high data communication speed and excellent error detec-
tion ability. Many electonic 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
NHEC1246
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
U1000*1
1000*1
CAN communication line
I
ECM cannot communicate to other control
unit.
I
ECM cannot communicate for more than
the specified time.
I
Harness or connectors
(CAN communication line is open or
shorted.)
U1001*2
1001*2
*1: This self-diagnosis has the one trip detection logic.
*2: The MIL will not light up for this diagnosis.
DTC Confirmation Procedure
NHEC1247
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 “Diagnostic Procedure”
EC-164.
DTC U1000, U1001 CAN COMMUNICATION LINE
Description
EC-162
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Wiring Diagram
NHEC1248
MEC578D
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC U1000, U1001 CAN COMMUNICATION LINE
Wiring Diagram
EC-163
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