2006 NISSAN VERSA Workshop Service Repair Manual

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NISSAN VERSA 2006 Workshop Service Repair Manual GI-30
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
Revision: June 20062007 Versa
CIRCUIT INSPECTION
Introduction
In general, testing electrical circuits is an easy task if it is approached in a logic

GI-30
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
Revision: June 20062007 Versa
CIRCUIT INSPECTION
Introduction
In general, testing electrical circuits is an easy task if it is approached in a logical and organized method.
Before beginning it is important to have all available information on the system to be tested. Also, get a thor-
ough understanding of system operation. Then you will be able to use the appropriate equipment and follow
the correct test procedure.
You may have to simulate vehicle vibrations while testing electrical components. Gently shake the wiring har-
ness or electrical component to do this.
NOTE:
Refer to “How to Check Terminal” to probe or check terminal.
Testing for “Opens” in the Circuit
Before you begin to diagnose and test the system, you should rough sketch a schematic of the system. This
will help you to logically walk through the diagnosis process. Drawing the sketch will also reinforce your work-
ing knowledge of the system.
CONTINUITY CHECK METHOD
The continuity check is used to find an open in the circuit. The digital multimeter (DMM) set on the resistance
function will indicate an open circuit as over limit (no beep tone or no ohms symbol). Make sure to always start
with the DMM at the highest resistance level.
To help in understanding the diagnosis of open circuits, please refer to the previous schematic.
Disconnect the battery negative cable.
Start at one end of the circuit and work your way to the other end. (At the fuse block in this example)
Connect one probe of the DMM to the fuse block terminal on the load side.
Connect the other probe to the fuse block (power) side of SW1. Little or no resistance will indicate that
portion of the circuit has good continuity. If there were an open in the circuit, the DMM would indicate an
over limit or infinite resistance condition. (point A)
Connect the probes between SW1 and the relay. Little or no resistance will indicate that portion of the cir-
cuit has good continuity. If there were an open in the circuit, the DMM would indicate an over limit or infi-
nite resistance condition. (point B)
Connect the probes between the relay and the solenoid. Little or no resistance will indicate that portion of
the circuit has good continuity. If there were an open in the circuit, the DMM would indicate an over limit or
infinite resistance condition. (point C)
Any circuit can be diagnosed using the approach in the previous example.
VOLTAGE CHECK METHOD
To help in understanding the diagnosis of open circuits please refer to the previous schematic.
In any powered circuit, an open can be found by methodically checking the system for the presence of voltage.
This is done by switching the DMM to the voltage function.
OPENA circuit is open when there is no continuity through a section of the circuit.
SHORTThere are two types of shorts.
SHORT CIRCUITWhen a circuit contacts another circuit and causes the normal resistance to
change.
SHORT TO GROUND When a circuit contacts a ground source and grounds the circuit.
SG I8 46 -A

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NISSAN VERSA 2006 Workshop Service Repair Manual SERVICE INFORMATION FOR ELECTRICAL INCIDENT
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Connect one probe of the DMM to a known good ground.
Begin probing at one end of the circuit

SERVICE INFORMATION FOR ELECTRICAL INCIDENT
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Connect one probe of the DMM to a known good ground.
Begin probing at one end of the circuit and work your way to the other end.
With SW1 open, probe at SW1 to check for voltage.
voltage; open is further down the circuit than SW1.
no voltage; open is between fuse block and SW1 (point A).
Close SW1 and probe at relay.
voltage; open is further down the circuit than the relay.
no voltage; open is between SW1 and relay (point B).
Close the relay and probe at the solenoid.
voltage; open is further down the circuit than the solenoid.
no voltage; open is between relay and solenoid (point C).
Any powered circuit can be diagnosed using the approach in the previous example.
Testing for “Shorts” in the Circuit
To simplify the discussion of shorts in the system, please refer to the following schematic.
RESISTANCE CHECK METHOD
Disconnect the battery negative cable and remove the blown fuse.
Disconnect all loads (SW1 open, relay disconnected and solenoid disconnected) powered through the
fuse.
Connect one probe of the DMM to the load side of the fuse terminal. Connect the other probe to a known
good ground.
With SW1 open, check for continuity.
continuity; short is between fuse terminal and SW1 (point A).
no continuity; short is further down the circuit than SW1.
Close SW1 and disconnect the relay. Put probes at the load side of fuse terminal and a known good
ground. Then, check for continuity.
continuity; short is between SW1 and the relay (point B).
no continuity; short is further down the circuit than the relay.
Close SW1 and jump the relay contacts with jumper wire. Put probes at the load side of fuse terminal and
a known good ground. Then, check for continuity.
continuity; short is between relay and solenoid (point C).
no continuity; check solenoid, retrace steps.
VOLTAGE CHECK METHOD
Remove the blown fuse and disconnect all loads (i.e. SW1 open, relay disconnected and solenoid discon-
nected) powered through the fuse.
Turn the ignition key to the ON or START position. Verify battery voltage at the battery + side of the fuse
terminal (one lead on the battery + terminal side of the fuse block and one lead on a known good ground).
With SW1 open and the DMM leads across both fuse terminals, check for voltage.
voltage; short is between fuse block and SW1 (point A).
no voltage; short is further down the circuit than SW1.
With SW1 closed, relay and solenoid disconnected and the DMM leads across both fuse terminals, check
for voltage.
voltage; short is between SW1 and the relay (point B).
SG I8 47 -A

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NISSAN VERSA 2006 Workshop Service Repair Manual GI-32
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
Revision: June 20062007 Versa
no voltage; short is further down the circuit than the relay.
With SW1 closed, relay contacts jumped with fused jumper

GI-32
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
Revision: June 20062007 Versa
no voltage; short is further down the circuit than the relay.
With SW1 closed, relay contacts jumped with fused jumper wire check for voltage.
voltage; short is down the circuit of the relay or between the relay and the disconnected solenoid (point C).
no voltage; retrace steps and check power to fuse block.
Ground Inspection
Ground connections are very important to the proper operation of electrical and electronic circuits. Ground
connections are often exposed to moisture, dirt and other corrosive elements. The corrosion (rust) can
become an unwanted resistance. This unwanted resistance can change the way a circuit works.
Electronically controlled circuits are very sensitive to proper grounding. A loose or corroded ground can drasti-
cally affect an electronically controlled circuit. A poor or corroded ground can easily 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:
Remove the ground bolt or screw.
Inspect all mating surfaces for tarnish, dirt, rust, etc.
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
eyelet 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
SG I8 53

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NISSAN VERSA 2006 Workshop Service Repair Manual SERVICE INFORMATION FOR ELECTRICAL INCIDENT
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Connect the DMM across the connector or part of the circuit you want to check. The positive l

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NISSAN VERSA 2006 Workshop Service Repair Manual GI-34
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
Revision: June 20062007 Versa
Control Unit Circuit Test
System Description:When the switch is ON, the control unit lights up the lamp.
INPUT-OUTPUT V

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NISSAN VERSA 2006 Workshop Service Repair Manual SERVICE INFORMATION FOR ELECTRICAL INCIDENT
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Control Units and Electrical PartsEAS001ZR
PRECAUTIONS
Never reverse polarity of battery term

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NISSAN VERSA 2006 Workshop Service Repair Manual GI-36
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
Revision: June 20062007 Versa
Do not apply excessive shock to the control unit by dropping or
hitting it.
Be careful to prevent condensation in the

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NISSAN VERSA 2006 Workshop Service Repair Manual CONSULT-II CHECKING SYSTEM
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CONSULT-II CHECKING SYSTEMPFP:00000
DescriptionEAS001ZS
CONSULT-II is a hand-held type tester. When it is con

CONSULT-II CHECKING SYSTEM
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CONSULT-II CHECKING SYSTEMPFP:00000
DescriptionEAS001ZS
CONSULT-II 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 Operator's Manual” for more information.
Function and System Application EAS001ZT
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)].
*4: This system is shown with NVIS (NATS) using program card AEN06B or later.
*5: With Intelligent Key System.
*6: Without Intelligent Key System.Diagnostic test mode Function
ENGINE
ABS*
1
AIR BAG
EPS
IPDM E/R
BCM
METER
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-II.x- - - -x-xxx- -x
Self-diagnostic results Self-diagnostic results can be read and erased quickly. x x x x x x x x x x x x 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. x x - x x - x x x x - - -
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-II 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 regard-
ing sensors/switches and/or actuators are available.xxx-----xx---
DTC & SRT confirma-
tionThe 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
prevent 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 -

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