NISSAN TIIDA 2008 Service Repair Manual

GI-30
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SERVICE INFORMATION FOR ELECTRICAL INCIDENT
• Clean as required to assure good contact.
• Reinstall bolt or screw securely.
• Inspect for “add-on” accessories which may be interfering with the ground circuit.
• 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 eye-
let make sure no ground wires have excess wire insulation.
For detailed ground distribution information, refer to “Ground Distribution” in PG section.
Voltage Drop Tests
Voltage drop tests are often used to find components or circuits which have excessive resistance. A voltage
drop in a circuit is caused by a resistance when the circuit is in operation.
Check the wire in the illustration. When measuring resistance with DMM, contact by a single strand of wire will
give reading of 0 ohms. This would indicate a good circuit. When the circuit operates, this single strand of wire
is not able to carry the current. The single strand will have a high resistance to the current. This will be picked
up as a slight voltage drop.
Unwanted resistance can be caused by many situations as follows:
• Undersized wiring (single strand example)
• Corrosion on switch contacts
• Loose wire connections or splices.
If repairs are needed always use wire that is of the same or larger gauge.
MEASURING VOLTAGE DROP — ACCUMULATED METHOD
• Connect the DMM across the connector or part of the circuit you want to check. The positive lead of the
DMM should be closer to power and the negative lead closer to ground.
• Operate the circuit.
• The DMM will indicate how many volts are being used to “push” current through that part of the circuit.
SGI853

SERVICE INFORMATION FOR ELECTRICAL INCIDENT
GI-31
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Note in the illustration that there is an excessive 4.1 volt drop between the battery and the bulb.
MEASURING VOLTAGE DROP — STEP-BY-STEP
The step-by-step method is most useful for isolating excessive drops in low voltage systems (such as those in
“Computer Controlled Systems”).
Circuits in the “Computer Controlled System” operate on very low amperage.
The (Computer Controlled) system operations can be adversely affected by any variation in resistance in the
system. Such resistance variation may be caused by poor connection, improper installation, improper wire
gauge or corrosion.
The step by step voltage drop test can identify a component or wire with too much resistance.
Control Unit Circuit Test
System Description:When the switch is ON, the control unit lights up the lamp.
INPUT-OUTPUT VOLTAGE CHART
SGI974
SAIA0258E
MGI034A

GI-32
< SERVICE INFORMATION >
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
The voltage value is based on the body ground.
*:If high resistance exists in the switch side circuit (caused by a single strand), terminal 1 does not detect battery voltage. Control unit
does not detect the switch is ON even if the switch does not turn ON. Therefore, the control unit does not supply power to light up the
lamp.
INPUT-OUTPUT VOLTAGE CHART
The voltage value is based on the body ground.
*:If high resistance exists in the switch side circuit (caused by a single strand), terminal 2 does not detect approx. 0V. Control unit does
not detect the switch is ON even if the switch does not turn ON. Therefore, the control unit does not control ground to light up the lamp.
Control Units and Electrical PartsINFOID:0000000001702442
PRECAUTIONS
• Never reverse polarity of battery terminals.
• Install only parts specified for a vehicle.
• Before replacing the control unit, check the input and output and
functions of the component parts.
• Do not apply excessive force when disconnecting a connector.
• If a connector is installed by tightening bolts, loosen bolt mounting
it, then take it out by hand.
Pin
No.Item ConditionVo l ta g e
value [V]In case of high resistance such as single strand [V] *
1SwitchSwitch ON Battery voltage Lower than battery voltage Approx. 8 (Example)
Switch OFF Approx. 0 Approx. 0
2LampSwitch ON Battery voltage Approx. 0 (Inoperative lamp)
Switch OFF Approx. 0 Approx. 0
MGI035A
Pin
No.Item ConditionVo l ta g e
value [V]In case of high resistance such as single strand [V] *
1LampSwitch ON Approx. 0 Battery voltage (Inoperative lamp)
Switch OFF Battery voltage Battery voltage
2SwitchSwitch ON Approx. 0 Higher than 0 Approx. 4 (Example)
Switch OFF Approx. 5 Approx. 5
SAIA0251E

SERVICE INFORMATION FOR ELECTRICAL INCIDENT
GI-33
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• Before installing a connector, make sure the terminal is not bent or
damaged, and then correctly connect it.
When installing a connector by tightening bolts, fix it by tightening
the mounting bolt until the painted projection of the connector
becomes even with the surface.
• For removal of the lever type connector, pull the lever up to the
direction pointed to by the arrow A in the figure, and then remove
the connector.
• For installation of the lever type connector, pull down the lever to
the direction pointed by the arrow B in the figure, and then push
the connector until a clicking noise is heard.
• Do not apply excessive shock to the control unit by dropping or hit-
ting it.
• Be careful to prevent condensation in the control unit due to rapid
temperature changes and do not let water or rain get on it. If water
is found in the control unit, dry it fully and then install it in the vehi-
cle.
• Be careful not to let oil to get on the control unit connector.
• Avoid cleaning the control unit with volatile oil.
• Do not disassemble the control unit, and do not remove the upper
and lower covers.
SAIA0252E
SAIA0253E
SAIA0254E
SAIA0255E

GI-34
< SERVICE INFORMATION >
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
• When using a DMM, be careful not to let test probes get close to
each other to prevent the power transistor in the control unit from
damaging battery voltage because of short circuiting.
• When checking input and output signals of the control unit, use the
specified check adapter.
SEF348N

CONSULT-III CHECKING SYSTEM
GI-35
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PCONSULT-III CHECKING SYSTEM
DescriptionINFOID:0000000001806209
• CONSULT-III is a hand-held type tester. When it is connected with a diagnostic connector equipped on the
vehicle side, it will communicate with the control unit equipped in the vehicle and then enable various kinds
of diagnostic tests.
• Refer to CONSULT-III Operator's Manual for more information.
Function and System ApplicationINFOID:0000000001806219
x: Applicable.
*1: If equipped.
*2: This option is shown on vehicles equipped with continuously variable transmission (CVT).
*3: NVIS (NATS) [NISSAN Vehicle Immobilizer System (Nissan Anti-theft System)]. Diagnostic test mode Function
ENGINE
ABS*
1
AIR BAG
EPS
IPDM E/R
BCM
METER/M&A
INTELLIGENT KEY*
1
A/T*
1
TRANSMISSION*
2
NVIS (NATS)*
3
NVIS (NATS BCM OR S/ENT)*
3
NATS I-KEY
*3,5
Work supportThis mode enables a technician to adjust some devices faster
and more accurately by following indications on CONSULT-III.x----x-xxx--x
Self-diagnostic results Self-diagnostic results can be read and erased quickly. xxxxxxxxxxx - x
Trouble diagnostic
recordCurrent self-diagnostic results and all trouble diagnostic records
previously stored can be read.--x----------
Data monitor Input/Output data in the ECU can be read. xx - xx - xxxx - - -
CAN diagnostic support
monitorThe communication condition of CAN communication line can
be read.xx - xxxxxxx - - -
Calibration data*
2Shows unit calibration IDs, offsets and gains. This data is stored
in the ECU memory.---------x---
Active testDiagnostic Test Mode in which CONSULT-III drives actuators
apart from ECU shifting some parameters in a specified range.xx--x--x-----
Function testThis mode can show results of self-diagnosis of ECU with either
"OK" or "NG". For engines, more practical tests regarding sen-
sors/switches and/or actuators are available.xxx-----xx---
DTC & SRT confirmationThe results of SRT (System Readiness Test) and the self-diag-
nosis status/result can be confirmed.x------------
DTC work supportThe operating condition to confirm Diagnosis Trouble Codes
can be selected.x-------x----
ECM/ECU part number ECM/ECU part number can be read. x x - x - x - x x x - - -
ECU discriminated No.Classification number of a replacement ECU can be read to pre-
vent an incorrect ECU from being installed.--x----------
Passenger airbag Displays the STATUS (readiness) of front passenger air bag. --x----------
Configuration Sets control module parameters to match vehicle options. -----x-------
Steering lock release
*4,5Condition of steering lock release solenoid. -----------x-
Control unit initializa-
tion
*4,6All registered ignition key IDs in NATS components can be ini-
tialized and new IDs can be registered.----------x--
PIN Read
*4This mode enables technician to get BCM-specific 5-digit code.-----------x-

GI-36
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CONSULT-III CHECKING SYSTEM
*4: This system is shown with NVIS (NATS) using program card AEN06B or later.
*5: With Intelligent Key System.
*6: Without Intelligent Key System.
CONSULT-III Data Link Connector (DLC) CircuitINFOID:0000000001806211
INSPECTION PROCEDURE
If the CONSULT-III cannot diagnose the system properly, check the following items.
WAWA0009E

CONSULT-III CHECKING SYSTEM
GI-37
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NOTE:
The DDL1 and DDL2 circuits from DLC pins 6, 7 and 14 may be connected to more than one system. A short
in a DDL circuit connected to a control unit in one system may affect CONSULT-III access to other systems.
Symptom Check item
CONSULT-III cannot access
any system.• CONSULT-III DLC power supply circuit (Terminal 8) and ground circuit (Terminal 4). For detailed cir-
cuit, refer to LAN-28, "
Wiring Diagram - CAN -".
CONSULT-III cannot access in-
dividual system. (Other sys-
tems can be accessed.)• Power supply and ground circuit for the control unit of the system (For detailed circuit, refer to wiring
diagram for each system).
• Open or short circuit between the system and CONSULT-III DLC (For detailed circuit, refer to wiring
diagram for each system).
• Open or short circuit CAN communication line. Refer to LAN-28, "
Wiring Diagram - CAN -" .

GI-38
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LIFTING POINT
LIFTING POINT
Special Service ToolINFOID:0000000001702449
CAUTION:
• Every time the vehicle is lifted up, maintain the complete vehicle curb condition.
• Since the vehicle's center of gravity changes when removing main parts on the front side (engine,
transmission, suspension etc.), support a jack up point on the rear side garage jack with a mission
jack or equivalent.
• Since the vehicle's center of gravity changes when removing main parts on the rear side (rear axle,
suspension, etc.), support a jack up point on the front side garage jack with a mission jack or equiv-
alent.
• Be careful not to smash or do not do anything that would affect piping parts.
Garage Jack and Safety Stand and 2-Pole LiftINFOID:0000000001702450
WARNING:
• Park the vehicle on a level surface when using the jack. Make sure to avoid damaging pipes, tubes,
etc. under the vehicle.
• Never get under the vehicle while it is supported only by the jack. Always use safety stands when
you have to get under the vehicle.
• Place wheel chocks at both front and back of the wheels on the ground.
• When lifting the vehicle, open the lift arms as wide as possible and ensure that the front and rear of
the vehicle are well balanced.
• When setting the lift arm, do not allow the arm to contact the brake tubes, brake cable, fuel lines and
sill spoiler.
Tool number
Tool nameDescription
LM4086-0200
Board on attachment
LM4519-0000
Safety stand attachment
S-NT001
S-NT002

LIFTING POINT
GI-39
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CAUTION:
There is canister just behind Garage jack point rear. Jack up be carefully.
Board-On LiftINFOID:0000000001702451
CAUTION:
Make sure vehicle is empty when lifting.
• The board-on lift attachment (LM4086-0200) set at front end of
vehicle should be set on the front of the sill under the front
door opening.
• Position attachments at front and rear ends of board-on lift.
1. Safety stand point and lift up point (front) 2. Safety stand point and lift up point
(rear)3. Garage jack point (front)
4. Garage jack point (rear)
PIIB2498E
AGI016