2008 NISSAN TIIDA U1001

EC-518
< SERVICE INFORMATION >
ASCD INDICATOR
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
2.CHECK DTC
Check that DTC U1000 or U1001 is not displayed.
Ye s o r N o
Yes >> Perform trouble diagnoses for DTC U1000, U1001, refer to EC-143.
No >> GO TO 3.
3.CHECK COMBINATION METER OPERATION
Does combination meter operate normally?
Ye s o r N o
Ye s > > G O T O 4 .
No >> Check combination meter circuit. Refer to DI-4
.
4.CHECK INTERMITTENT INCIDENT
Refer to EC-136
.
>>INSPECTION END
ASCD INDICATOR CONDITION SPECIFICATION
CRUISE LAMP • Ignition switch: ONMAIN switch: Pressed at 1st
time → 2ndON → OFF
SET LAMP•MAIN switch: ON
• Vehicle: Between 40 km/h (25
MPH) and 144 km/h (89
MPH)ASCD: Operating ON
ASCD: Not operating OFF

TROUBLE DIAGNOSIS
LAN-9
< FUNCTION DIAGNOSIS >[CAN FUNDAMENTAL]
C
D
E
F
G
H
I
J
L
MA
B
LAN
N
O
P
TROUBLE DIAGNOSIS
Condition of Error DetectionINFOID:0000000001711205
“U1000” or “U1001” is indicated on SELF-DIAG RESULTS on CONSULT-III if CAN communication signal is
not transmitted or received between units for 2 seconds or more.
CAN COMMUNICATION SYSTEM ERROR
• CAN communication line open (CAN-H, CAN-L, or both)
• CAN communication line short (ground, between CAN communication lines, other harnesses)
• Error of CAN communication control circuit of the unit connected to CAN communication line
WHEN “U1000” OR “U1001” IS INDICATED EVEN THOUGH CAN COMMUNICATION SYSTEM IS
NORMAL
• Removal/installation of parts: Error may be detected when removing and installing CAN communication unit
and related parts while turning the ignition switch ON. (A DTC except for CAN communication may be
detected.)
• Fuse blown out (removed): CAN communication of the unit may cease.
• Voltage drop: Error may be detected if voltage drops due to discharged battery when turning the ignition
switch ON (Depending on the control unit which carries out CAN communication).
• Error may be detected if the power supply circuit of the control unit, which carries out CAN communication,
malfunctions (Depending on the control unit which carries out CAN communication).
• Error may be detected if reprogramming is not completed normally.
NOTE:
CAN communication system is normal if “U1000” or “U1001” is indicated on SELF-DIAG RESULTS of CON-
SULT-III under the above conditions. Erase the memory of the self-diagnosis of each unit.
Symptom When Error Occurs in CAN Communication SystemINFOID:0000000001711206
In CAN communication system, multiple units mutually transmit and receive signals. Each unit cannot transmit
and receive signals if any error occurs on CAN communication line. Under this condition, multiple control units
related to the root cause malfunction or go into fail-safe mode.
ERROR EXAMPLE
NOTE:
• Each vehicle differs in symptom of each unit under fail-safe mode and CAN communication line wiring.
• Refer to LAN-20, "
Abbreviation List" for the unit abbreviation.
Example: TCM branch line open circuit
SKIB8738E
Unit name Symptom
ECM Engine torque limiting is affected, and shift harshness increases.
BCM Reverse warning chime does not sound.

LAN-12
< FUNCTION DIAGNOSIS >[CAN FUNDAMENTAL]
TROUBLE DIAGNOSIS
CAN Diagnosis with CONSULT-III
INFOID:0000000001711207
CAN diagnosis on CONSULT-III extracts the root cause by receiving the following information.
• Response to the system call
• Control unit diagnosis information
• Self-diagnosis
• CAN diagnostic support monitor
Self-DiagnosisINFOID:0000000001711208
CAN Diagnostic Support MonitorINFOID:0000000001711209
MONITOR ITEM (CONSULT-III)
Unit name Symptom
ECM• Engine torque limiting is affected, and shift harshness increases.
• Engine speed drops.
BCM• Reverse warning chime does not sound.
• The front wiper moves under continuous operation mode even though the front
wiper switch being in the intermittent position.
• The room lamp does not turn ON.
• The engine does not start (if an error or malfunction occurs while turning the igni-
tion switch OFF.)
• The steering lock does not release (if an error or malfunction occurs while turning
the ignition switch OFF.)
EPS control unit The steering effort increases.
Combination meter• The tachometer and the speedometer do not move.
• Warning lamps turn ON.
• Indicator lamps do not turn ON.
ABS actuator and electric unit (control unit) Normal operation.
TCM No impact on operation.
IPDM E/RWhen the ignition switch is ON,
• The headlamps (Lo) turn ON.
• The cooling fan continues to rotate.
DTCSelf-diagnosis item
(CONSULT-III indication)DTC detection condition Inspection/Action
U1000 CAN COMM CIRCUITWhen ECM is not transmitting or receiving CAN
communication signal of OBD (emission-related
diagnosis) for 2 seconds or more.
Start the inspection. Re-
fer to the applicable sec-
tion of the indicated
control unit. When a control unit (except for ECM) is not
transmitting or receiving CAN communication
signal for 2 seconds or more.
U1001 CAN COMM CIRCUITWhen ECM is not transmitting or receiving CAN
communication signal other than OBD (emis-
sion-related diagnosis) for 2 seconds or more.
U1002 SYSTEM COMMWhen a control unit is not transmitting or receiv-
ing CAN communication signal for 2 seconds or
less.
U1010 CONTROL UNIT [CAN]When an error is detected during the initial diag-
nosis for CAN controller of each control unit.Replace the control unit
indicating “U1010”.