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nissan :: Nissan-Datsun Truck Quest Minivan XE
V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Antitheft Relay > Component Information > Locations
Antitheft Relay: Locations
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Antitheft Relay > Component Information > Locations > Page 7
Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
Component Parts and Harness Connector Location
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Antitheft Relay > Component Information > Locations > Page 8
Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
Engine Compartment
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Passenger Compartment
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> Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Control Module > Component Information > Locations
Power Door Lock Control Module: Locations
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> Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Control Module > Component Information > Locations > Page 13
Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
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Component Parts and Harness Connector Location
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> Relays and Modules > Relays and Modules - Brakes and Traction Control > ABS Main Relay > Component Information > Locations
ABS Main Relay: Locations
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Component Parts Location and Harness Layout
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> Relays and Modules > Relays and Modules - Brakes and Traction Control > ABS Main Relay > Component Information > Diagrams > Diagram Information and Instructions
ABS Main Relay: Diagram Information and Instructions
Sample Diagram Information
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Instructions > Page 20
Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
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Optional Splice
Example Diagrams
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Instructions > Page 21
Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
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> Relays and Modules > Relays and Modules - Brakes and Traction Control > ABS Main Relay > Component Information > Diagrams > Diagram Information and
Instructions > Page 22
Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
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Description Charts
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Instructions > Page 23
Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
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CONNECTOR SYMBOLS
Most of connector symbols in wiring diagrams are shown from the terminal side.
^ Connector symbols shown from the terminal side are enclosed by a single line and followed by the direction mark.
^ Connector symbols shown from the harness side are enclosed by a double line and followed by the direction mark.
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Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
^ Connector guides for male terminals are shown in black.
^ Connector guides for female terminals are shown in white.
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Harness Indication
^ Connector numbers in a signal oval (M33) indicate harness connectors.
^ Letter designations next to test meter probes indicate harness (connector) wire colors.
Component Indication
^ Connector numbers in a double oval (F211) indicate component connectors.
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> Relays and Modules > Relays and Modules - Brakes and Traction Control > ABS Main Relay > Component Information > Diagrams > Diagram Information and
Instructions > Page 25
Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
SWITCH POSITIONS
Switches are shown in wiring diagrams as if the vehicle is in the "normal" condition.A vehicle is in the "normal" condition when:
^
ignition switch is ,"OFF"
^ doors, hood and trunk lid/back door are closed,
^ pedals are not depressed , and
^ parking brakes is released.
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DETECTABLE LINES AND NON-DETECTABLE LINES
In some wiring diagrams, two kinds of lines with different thicknesses are used to representing wires.
^
A line with regular thickness (wider line) represents a "detectable line for DTC (Diagnostic Trouble Code)". A "detectable line for DTC" is acircuit in which (ECM) (ECCS control module) can detect malfunctions with the on-board diagnostic system.
^
A line with less thickness (thinner line) represents a "non-detectable line for DTC". A "non-detectable line for DTC" is a circuit in which ECMcannot detect malfunctions with the on-board diagnostic system.
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> Relays and Modules > Relays and Modules - Brakes and Traction Control > ABS Main Relay > Component Information > Diagrams > Diagram Information and
Instructions > Page 26
Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
MULTIPLE SWITCH
The continuity of multiple switch is described in two ways as shown below.
^ The switch chart is used in schematic diagrams.
^ The switch diagram is used in wiring diagrams.
How to Perform Efficient Diagnosis For an Electrical Incident
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Work Flow Chart
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Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
Description Chart
Wiring Diagram Codes (Cell Codes)
Use the chart to find out what each wiring diagram code stands for.
..................................................................................................................................................................................CODE WIRING DIAGRAM NAME
AAC/V ...................................................................................................................................................................................................... IACV-AAC ValveABS ................................................................................................................................................................................................ Anti-Lock Brake SystemA/C, A .................................................................................................................................................................................................. Auto Air ConditionerA/C, M ............................................................................................................................................................................................. Manual Air ConditionerAP/SEN ......................................................................................................................................................................................... Absolute Pressure Sensor
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Instructions > Page 28
Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
ASCD .................................................................................................................................................................. Automatic Speed Control Device (ASCD)A/T ........................................................................................................................................................................................................ Automatic TransaxleAT/C ................................................................................................................................................................................................................... A/T ControlATDIAG ....................................................................................................................................................................... A/T Diagnosis Communication LineAUDIO ......................................................................................................................................................................................................................... AudioBACK/L ......................................................................................................................................................................................................... Back-up LampBYPS/V ............................................................................................................................................................................ Vacuum Cut Valve Bypass ValveCANI/V ........................................................................................................................................................ EVAP Canister Purge Control Solenoid ValveCHARGE .................................................................................................................................................................................................... Charging SystemCHIME ......................................................................................................................................................................................................... Warning ChimeCIGAR ........................................................................................................................................................................................................ Cigarette LighterCKPS .......................................................................................................................................................................................... Crankshaft Position SensorCMPS ............................................................................................................................................................................................ Camshaft Position SensorCOOL/F ................................................................................................................................................................................................. Cooling Fan ControlCORNER ..................................................................................................................................................................................................... Cornering LampDEF .................................................................................................................................................................................................. Rear Window DefoggerD/LOCK .................................................................................................................................................................................................... Power Door LockDTRL ..................................................................................................................................................................... Headlamp - With Daytime Light SystemECTS ............................................................................................................................................................................ Engine Coolant Temperature SensorEGRC1 ............................................................................................................................................................................................................ EGR FunctionEGRC/V ............................................................................................................................................................................................. EGRC-Solenoid ValveEGR/TS ......................................................................................................................................................................................... EGR Temperature SensorFICD ......................................................................................................................................................................................... IACV-FICD Solenoid ValveF/PUMP ................................................................................................................................................................................................... Fuel Pump ControlFRO2 ........................................................................................................................................................................................ Front Heated Oxygen SensorFRO2/H ........................................................................................................................................................................ Front Heated Oxygen Sensor HeaterFUEL .................................................................................................................................................................................... Fuel Injection System FunctionH/LAMP ................................................................................................................................................................................................................ HeadlampH/MIRR ........................................................................................................................................................................................................... Heated mirrorHORN ............................................................................................................................................................................................................................ HornHP/SW ................................................................................................................................................................................................. High Pressure SwitchIATS ..................................................................................................................................................................................... Intake Air Temperature SensorIGN/SG ........................................................................................................................................................................................................... Ignition SignalILL ...................................................................................................................................................................................................................... IlluminationINJECT ...................................................................................................................................................................................................................... InjectorINT/L ....................................................................................................................................................................... Interior, Map, Step and Tailgate LampsKS .................................................................................................................................................................................................................... Knock SensorMAFS ................................................................................................................................................................................................. Mass Air Flow SensorMAIN ...................................................................................................................................................................... Main Power Supply and Ground CircuitMETER ................................................................................................................................................. Speedometer, Tachometer, Temp. and Fuel GaugesMIL/DL MIL, Data Link Connector For CONSULT, GSTMIRROR ............................................................................................................................................................................................................ Door MirrorMULTI .................................................................................................................................................................................... Multi-remote Control SystemP/ANT ............................................................................................................................................................................................................ Power AntennaPGC/V ............................................................................................................................................................ EVAP Canister Purge Volume Control ValvePNP/SW ................................................................................................................................................................................... Park/Neutral Position SwitchPOWER .............................................................................................................................................................................................. Power Supply RoutingPRE/SE .................................................................................................................................................................... EVAP Control System Pressure SensorPST/SW ......................................................................................................................................................................... Power Steering Oil Pressure SwitchRRO2 ........................................................................................................................................................................................ Rear Heated Oxygen SensorRRO2/H ......................................................................................................................................................................... Rear Heated Oxygen Sensor HeaterSEAT .................................................................................................................................................................................................................... Power SeatSHIFT ................................................................................................................................................................................................ A/T Shift Lock SystemSROOF ...................................................................................................................................................................................................................... SunroofSRS ....................................................................................................................................................................................... Supplemental Restraint SystemS/SIG ................................................................................................................................................................................................................... Start SignalSTART .......................................................................................................................................................................................................... Starting SystemSW/V ........................................................................................................................................................................... MAP/BARO Switch Solenoid ValveTAIL/L ..................................................................................................................................................................... Parking, License, Tail and Stop LampsT/TOW ................................................................................................................................................................................................................ Trailer TowTFTS ..................................................................................................................................................................................... Tank Fuel Temperature SensorTHEFT ............................................................................................................................................................................................... Theft Warning SystemTPS .................................................................................................................................................................................................. Throttle Position SensorTP/SW ............................................................................................................................................................................................. Throttle Position SwitchTURN .................................................................................................................................................................... Turn Signal and Hazard Warning LampsVENT/V ........................................................................................................................................................................ EVAP Canister Vent Control Valve
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VSS ..................................................................................................................................................................................................... Vehicle Speed SensorWARN .......................................................................................................................................................................................................... Warning LampsWINDOW ..................................................................................................................................................................................................... Power WindowWIPER ............................................................................................................................................................................................ Front Wiper and WasherWIP/R .......................................................................................................................................... Rear Wiper and Washer (Except for Glass Hatch Model)WIP/R ..................................................................................................................................................... Rear Wiper and Washer (For Glass Hatch Model)
Diagram Instructions
FINDING ELECTRICAL DIAGRAMS
Electrical diagrams can be found by selecting the specific component or by selecting diagrams at vehicle level.
REFERENCED DIAGRAMS
In many instances electrical diagrams will refer you to another electrical diagram to complete the circuit. These referenced electrical diagrams can befound at vehicle level under "Diagrams".
DIAGRAM IDENTIFICATION
The referenced electrical diagrams are displayed by system:
AT-DIAGRAMS...............Automatic TransmissionBR-DIAGRAMS...............Brake SystemEC-DIAGRAMS...............Engine Control SystemEL-DIAGRAMS...............Electrical SystemHA-DIAGRAMS...............Heater And Air ConditionerRS-DIAGRAMS...............Restraint System
Introduction
In general, testing electrical circuits is an easy task if approached logically. Before beginning, it is important to have all available information on thesystem to be tested. Also, get a thorough understanding of system operation. Then you will be able to use the appropriate equipment and follow thecorrect test procedure.You may have to simulate vehicle vibrations while testing electrical components. Gently shake the wiring harness or electrical component to do this.
OPEN A circuit is open when there is no continuity through a section of the circuit.
SHORT There are two types of shorts.
^ SHORT CIRCUIT When 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.
Refer to "How to Probe Terminal" to probe or check terminal.NOTE:
Testing For "OPENS" In the Circuit
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> Relays and Modules > Relays and Modules - Brakes and Traction Control > ABS Main Relay > Component Information > Diagrams > Diagram Information and
Instructions > Page 29
Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
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 thediagnosis process. Drawing the sketch will also reinforce your working knowledge of the system.
Continuity check method Digital Multimeter (DMM)
The continuity check is used to find an open in the circuit. The set on the resistance function will indicate an opencircuit as over limit (OL, no beep tone or no ohms symbol). Make sure no power is supplied to the checked component. Always start with theDMM at the highest resistance level.To help in understanding the diagnosis of open circuits please refer to the image above.1. Disconnect the battery negative cable.2. Start at one end of the circuit and work your way to the other end (At the fuse block in this example).3. Connect one probe of the DMM to the fuse block terminal on the load side.
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4. 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. It there were an open in the circuit, the DMM would indicate an over limit or infinite resistance condition (point A).
5. Connect the probes between SW1 and the relay. 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 B).
6. 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 above example.
Voltage check method
To help in understanding the diagnosis of open circuits please refer to the previous image.In any powered circuit, an open can be found by methodically checking the system for voltage. This is done by switching the DMM to the voltagefunction.1. Connect one probe of the DMM to a known good ground.2. Begin probing at one end of the circuit and work your way to the other end.3. 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).
4. 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).
5. 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 above example.
Testing For "SHORTS" In the Circuit
Resistance check method
1. Disconnect the battery negative cable and remove the blown fuse.2. Disconnect all loads (SW1 open, relay disconnected and solenoid disconnected) powered through the fuse.3. Connect one probe of the ohmmeter to the load side of the fuse terminal. Connect the other probe to a known good ground.4. 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.
5. 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.
6. 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.
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Instructions > Page 30
Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
Voltage Check Method
1. Remove the blown fuse and disconnect all loads (i.e., SW1 open, relay disconnected and solenoid disconnected) powered through the fuse.2. Turn the ignition key to the or position. Verify battery voltage at the B+ side of the fuse terminal (one lead on the B+ terminalON START
side of the fuse block and one lead on a known good ground).
3. 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.
4. 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).No voltage: Short is further down the circuit than the relay.
5. 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).
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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 drastically affect an electronically controlledcircuit. 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 thesurface. When inspecting a ground connection follow these rules:
1. Remove the ground bolt or screw or clip.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.
Voltage Drop Tests
0 Ohms
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 resistancewhen the circuit is in operation.Check the wire in the illustration. When measuring resistance with ohmmeter, contact by a single strand of wire will give reading of . This wouldindicate 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 resistanceto the current. This will be picked up as a slight voltage drop.Unwanted resistance can be caused by many situations:
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.
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Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
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1. Connect the voltmeter across the connector or part of the circuit you want to check. The positive lead of the voltmeter should be closer toMeasuring voltage drop - Accumulated method
power and negative lead closer to ground.
2. Operate the circuit.3. The voltmeter will indicate how many volts are being used to "push" current through that part of the circuit.
In the illustration that there is an excessive drop between the battery and the bulb.NOTE: 4.1 Volt
Measuring voltage drop - Step by step
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Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
The step by step method is most useful for isolating excessive drops in low voltage systems (such as computer controlled systems).Circuits in the computer controlled system operate on very low amperage.Computer controlled operations can be adversely affected by any variation in resistance in the system. Such resistance variation may be caused bypoor 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.
System Description: When the switch is , the ECM lights up the lamp.Relationship between open/short (high resistance) circuit and the ECM pin control ON
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Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
Introduction
Sometimes the symptom is not present when the vehicle is brought in for service. If possible, re-create the conditions present at the time of the incident.Doing so may help avoid a No Trouble Found Diagnosis. The following section illustrates ways to simulate the conditions/environment under which thevehicle experiences an electrical incident.
The tests are broken into the six following topics;
^ Vehicle vibration
^ Heat sensitive
^ Freezing
^ Water intrusion
^ Electrical load
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^ Cold or hot start up
Get a thorough description of the incident from the customer. It is important for simulating the conditions of the problem.
Vehicle Vibration
The problem may occur or become worse while driving on a rough road or when engine is vibrating (idle with A/C on). In such a case, you will want tocheck for a vibration related condition.
Connectors & harness
Determine which connectors and wiring harness would affect the electrical system you are inspecting. Gently shake each connector and harnesswhile monitoring the system for the incident you are trying to duplicate. This test may indicate a loose or poor electrical connection.
HINT:
Connectors can be exposed to moisture. It is possible to get a thin film of corrosion on the connector terminals. A visual inspection maynot reveal this without disconnecting the connector. If the problem occurs intermittently, perhaps the problem is caused by corrosion. It is a goodidea to disconnect, inspect and clean the terminals on related connectors in the system.
Sensors & relays
Gently apply a slight vibration to sensors and relays in the system you are inspecting.This test may indicate a loose or poorly mounted sensor or relay.
Engine Compartment
There are several reasons a vehicle or engine vibration could cause an electrical complaint. Some of the things to check for are:^
Connectors not fully seated.
^ Wiring harness not long enough and is being stressed due to engine vibrations or rocking.
^ Wires laying across brackets or moving components.
^ Loose, dirty or corroded ground wires.
^ Wires routed too close to hot components.
To inspect components under the hood, start by verifying the integrity of ground connections. First, check that the system is properly grounded.Then, check for loose connection by gently shaking the wiring or components as previously explained. Using the wiring diagrams, inspect thewiring for continuity.
Behind the instrument panel
An improperly routed or improperly clamped harness can become pinched during accessory installation. Vehicle vibration can aggravate a harnesswhich is routed along a bracket or near a screw.
Under Seating areas
An unclamped or loose harness can cause wiring to be pinched by seat components (such as slide guides) during vehicle vibration. If the wiringruns under seating areas, inspect wire routing for possible damage or pinching.
Heat Sensitive
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Instructions > Page 34
Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
The owner's problem may occur during hot weather or after car has sat for a short time. In such cases you will want to check for a heat sensitivecondition.
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To determine if an electrical component is heat sensitive, heat it with a heat gun or equivalent.Do not heat components above . If incident occurs while heating the unit, either replace or properly insulate the component.60 C (140 F)
Freezing
The customer may indicate the incident goes away after the car warms up (winter time). The cause could be related to water freezing somewhere in thewiring/electrical system.There are two methods to check for this. The first is to arrange for the owner to leave the car overnight. Make sure it will get cold enough to demonstratethe complaint. Leave the car parked outside overnight. In the morning, do a quick and thorough diagnosis of those electrical components which could beaffected.The second method is to put the suspect component into a freezer long enough for any water to freeze. Reinstall the part into the car and check for thereoccurrence of the incident. If it occurs, repair or replace the component.
Water Intrusion
The incident may occur only during high humidity or in rainy/snowy weather. In such cases the incident could be caused by water intrusion on anelectrical part. This can be simulated by soaking the car or running it through a car wash.Do not spray water directly on any electrical components.
Electrical Load
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Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
The incident may be electrical load sensitive. Perform diagnosis with all accessories (including A/C, rear window defogger, radio, fog lamps) turned on.
Cold or Hot Start Up
On some occasions, an electrical incident may occur only when the car is started cold. Or it may occur when the car is restarted hot shortly after beingturned off. In these cases you may have to keep the car overnight to make a proper diagnosis.
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Ground Distribution Cell Codes
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Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
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Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
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Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
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Wire Color Code Identification
B:
Black
BR:
Brown
CH:
Dark Brown
DG:
Dark Green
G:
Green
GY:
Grey
L:
Blue
LG:
Light Green
OR:
Orange
P:
Pink
PU:
Purple
R:
Red
SB:
Sky Blue
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W:
White
Y:
Yellow
When the wire color is striped, the base color is given first, followed by the stripe color as shown below:Example: L/W = Blue with White stripe.
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ABS Main Relay: Diagnostic Aids
How to Follow This Flowchart
1. Work and diagnostic procedure
Start to diagnose a problem using procedures indicated in image, as shown in the following example.
2. Measurement results
11 - 14 V
12 V 0 V
Required results are indicated as shown.These have the following meanings:Battery voltage -> or approximately Voltage: Approximately -> Less than Resistance: Continuity should exist -> Approximately 1 V 0 Ohms
3. Cross reference of work symbols in the text and illustrations
Illustrations are provided as visual aids for work procedures. For example, symbol [A] indicated in the left upper portion of each illustrationcorresponds with the symbol in the flowchart for easy identification. More precisely, the procedure under the "CHECK POWER SUPPLY"outlined previously is indicated by an illustration [A]
4. Symbols used in illustrations
Symbols included in illustrations refer to measurements or procedures. Before diagnosing a problem, familiarize yourself with each symbol.
Direction Mark
Refer to "Connector Symbols"
Flow Chart Example
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Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
The flowchart indicates work procedures required to diagnose problems effectively. Observe the following instructions before diagnosing.
1. Use the flowchart after locating probable causes of a problem following the "Preliminary Check", the "Symptom Chart", or the "Work Flow".2. After repairs, re-check that the problem has been completely eliminated.3. Refer to Component Parts Location and Harness connector location for the Systems described in each section for identification/location of
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components and harness connectors.
4. Refer to the Circuit Diagram for Quick Pinpoint Check.
If you must check circuit continuity between harness connectors in more detail, such as when a sub-harness is used, refer to Wiring Diagram andHarness Layout for identification of harness connectors.
"OFF"
5. When checking circuit continuity, ignition switch should be .6. Before checking voltage at connectors, check battery voltage.7. After accomplishing the Diagnostic Procedures and Electrical Components Inspection, make sure that all harness connectors are reconnected
properly.
Key to Symbol Signifying Measurements or Procedures
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Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
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Flow Chart
Connector and Terminal Pin Kit
Connector And Terminal Pin Kit
Use the connector and terminal pin kit listed below when replacing connectors or terminals.The connector and terminal pin kit contains some of the most commonly used NISSAN connectors and terminals.
How to Check Enlarged Contact Spring of Terminal
An enlarged contact spring of a terminal may create intermittent signals in the circuit.If the intermittent open circuit occurs, follow the procedure below to inspect for open wires and enlarged contact spring of female terminal.
1. Assemble a male terminal and approx. of wire. 10 cm (3.9 in)
Use a male terminal which matches the female terminal.NOTE:
2. Disconnect the suspected faulty connector and hold it terminal side up.
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3. While holding the wire of the male terminal, try to insert the male terminal into the female terminal.
Do not force the male terminal into the female terminal with your hands.NOTE:
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4. While moving the connector, check whether the male terminal can be easily inserted or not.
^ If the male terminal can be easily inserted into the female terminal, replace the female terminal.
Connector Inspection
If water enters the connector, it can short interior circuits. This may lead to intermittent problems.Check the following items to maintain the original waterproof characteristics.
RUBBER SEAL INSPECTION
Most waterproof connectors are provided with a rubber seal between the male and female connectors. If the seal is missing, the waterproofperformance may not meet specifications.The rubber seal may come off when connectors are disconnected. Whenever connectors are reconnected, make sure the rubber seal is properlyinstalled on either side of male or female connector.
The wire seal must be installed on the wire insertion area of a waterproof connector. Be sure that the seal is installed properly.WIRE SEAL INSPECTION
How to Probe Connectors
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digitalmultimeter (DMM)
Connector damage and an intermittent connection can result from improperly probing of the connector during circuit checks. The probe of a may not correctly fit the connector cavity. To correctly probe the connector, follow the procedures below using a "T" pin. For thebest contact grasp the "T" pin using an alligator clip.
Probing From Harness Side
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Standard type (not waterproof type) connector should be probed from harness side with "T" pin.
NOTE:
^ If the connector has a rear cover such as a ECM connector, remove the rear cover before probing the terminal.
^ Do not probe waterproof connector from harness side. Damage to the seal between wire and connector may result.
Female Terminal
There is a small notch above each female terminal. Probe each terminal with the "T" pin through the notch.
Do not insert any object other than the same type male terminal into female terminal.NOTE:
^
Some connectors do not have a notch above each terminal. To probe each terminal, remove the connector retainer to make contact space forprobing.
Male Terminal
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Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
Carefully probe the contact surface of each terminal using a "T" pin.
Do not bend terminal.NOTE:
Terminal Lock Inspection
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Check for unlocked terminals by pulling wire at the end of connector.Unlocked terminal may create intermittent signals in the circuit.
Loading Procedure
Loading Procedure
Consult Data Link Connector (DLC) Circuit
Consult Data Link Connector (DLC) Circuit
Inspection Procedure
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If the CONSULT cannot diagnose the system properly, check the following items.
Harness Connectors
Harness Connector Example
^ All harness connectors have been designed to prevent accidental looseness or disconnection.
^ The connector can be disconnected by pushing or lifting the locking section.
Do not pull the harness when disconnecting the connector.CAUTION:
Standardized Relays
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Norman Open, Normal Closed And Mixed Type Relays
Relays can mainly be divided into three types: normal open, normal closed and mixed type relays.
Type Of Standardized Relays part 1
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ABS Main Relay: Electrical Diagrams
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ABS Main Relay: Service and Repair
1. Disconnect battery cable.2. Remove ABS relay box cover.
It is not necessary to remove the two screws for relay box.NOTE:
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Brake Fluid Pump Relay: Locations
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Component Parts Location and Harness Layout
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Brake Fluid Solenoid Valve Relay: Diagram Information and Instructions
Sample Diagram Information
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Optional Splice
Example Diagrams
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Description Charts
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CONNECTOR SYMBOLS
Most of connector symbols in wiring diagrams are shown from the terminal side.
^ Connector symbols shown from the terminal side are enclosed by a single line and followed by the direction mark.
^ Connector symbols shown from the harness side are enclosed by a double line and followed by the direction mark.
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^ Connector guides for male terminals are shown in black.
^ Connector guides for female terminals are shown in white.
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Harness Indication
^ Connector numbers in a signal oval (M33) indicate harness connectors.
^ Letter designations next to test meter probes indicate harness (connector) wire colors.
Component Indication
^ Connector numbers in a double oval (F211) indicate component connectors.
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Quest Minivan XE V6-2960cc 3.0L SOHC MFI (VG30E) (1998)
SWITCH POSITIONS
Switches are shown in wiring diagrams as if the vehicle is in the "normal" condition.A vehicle is in the "normal" condition when:
^
ignition switch is ,"OFF"
^ doors, hood and trunk lid/back door are closed,
^ pedals are not depressed , and
^ parking brakes is released.
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DETECTABLE LINES AND NON-DETECTABLE LINES
In some wiring diagrams, two kinds of lines with different thicknesses are used to representing wires.
^
A line with regular thickness (wider line) represents a "detectable line for DTC (Diagnostic Trouble Code)". A "detectable line for DTC" is acircuit in which (ECM) (ECCS control module) can detect malfunctions with the on-board diagnostic system.
^
A line with less thickness (thinner line) represents a "non-detectable line for DTC". A "non-detectable line for DTC" is a circuit in which ECMcannot detect malfunctions with the on-board diagnostic system.
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MULTIPLE SWITCH
The continuity of multiple switch is described in two ways as shown below.
^ The switch chart is used in schematic diagrams.
^ The switch diagram is used in wiring diagrams.
How to Perform Efficient Diagnosis For an Electrical Incident
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Work Flow Chart
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Description Chart
Wiring Diagram Codes (Cell Codes)
Use the chart to find out what each wiring diagram code stands for.
..................................................................................................................................................................................CODE WIRING DIAGRAM NAME
AAC/V ...................................................................................................................................................................................................... IACV-AAC ValveABS ................................................................................................................................................................................................ Anti-Lock Brake SystemA/C, A .................................................................................................................................................................................................. Auto Air ConditionerA/C, M ............................................................................................................................................................................................. Manual Air ConditionerAP/SEN ......................................................................................................................................................................................... Absolute Pressure Sensor
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ASCD .................................................................................................................................................................. Automatic Speed Control Device (ASCD)A/T ........................................................................................................................................................................................................ Automatic TransaxleAT/C ................................................................................................................................................................................................................... A/T ControlATDIAG ....................................................................................................................................................................... A/T Diagnosis Communication LineAUDIO ......................................................................................................................................................................................................................... AudioBACK/L ......................................................................................................................................................................................................... Back-up LampBYPS/V ............................................................................................................................................................................ Vacuum Cut Valve Bypass ValveCANI/V ........................................................................................................................................................ EVAP Canister Purge Control Solenoid ValveCHARGE .................................................................................................................................................................................................... Charging SystemCHIME ......................................................................................................................................................................................................... Warning ChimeCIGAR ........................................................................................................................................................................................................ Cigarette LighterCKPS .......................................................................................................................................................................................... Crankshaft Position SensorCMPS ............................................................................................................................................................................................ Camshaft Position SensorCOOL/F ................................................................................................................................................................................................. Cooling Fan ControlCORNER ..................................................................................................................................................................................................... Cornering LampDEF .................................................................................................................................................................................................. Rear Window DefoggerD/LOCK .................................................................................................................................................................................................... Power Door LockDTRL ..................................................................................................................................................................... Headlamp - With Daytime Light SystemECTS ............................................................................................................................................................................ Engine Coolant Temperature SensorEGRC1 ............................................................................................................................................................................................................ EGR FunctionEGRC/V ............................................................................................................................................................................................. EGRC-Solenoid ValveEGR/TS ......................................................................................................................................................................................... EGR Temperature SensorFICD ......................................................................................................................................................................................... IACV-FICD Solenoid ValveF/PUMP ................................................................................................................................................................................................... Fuel Pump ControlFRO2 ........................................................................................................................................................................................ Front Heated Oxygen SensorFRO2/H ........................................................................................................................................................................ Front Heated Oxygen Sensor HeaterFUEL .................................................................................................................................................................................... Fuel Injection System FunctionH/LAMP ................................................................................................................................................................................................................ HeadlampH/MIRR ........................................................................................................................................................................................................... Heated mirrorHORN ............................................................................................................................................................................................................................ HornHP/SW ................................................................................................................................................................................................. High Pressure SwitchIATS ..................................................................................................................................................................................... Intake Air Temperature SensorIGN/SG ........................................................................................................................................................................................................... Ignition SignalILL ...................................................................................................................................................................................................................... IlluminationINJECT ...................................................................................................................................................................................................................... InjectorINT/L ....................................................................................................................................................................... Interior, Map, Step and Tailgate LampsKS .................................................................................................................................................................................................................... Knock SensorMAFS ................................................................................................................................................................................................. Mass Air Flow SensorMAIN ...................................................................................................................................................................... Main Power Supply and Ground CircuitMETER ................................................................................................................................................. Speedometer, Tachometer, Temp. and Fuel GaugesMIL/DL MIL, Data Link Connector For CONSULT, GSTMIRROR ............................................................................................................................................................................................................ Door MirrorMULTI .................................................................................................................................................................................... Multi-remote Control SystemP/ANT ............................................................................................................................................................................................................ Power AntennaPGC/V ............................................................................................................................................................ EVAP Canister Purge Volume Control ValvePNP/SW ................................................................................................................................................................................... Park/Neutral Position SwitchPOWER .............................................................................................................................................................................................. Power Supply RoutingPRE/SE .................................................................................................................................................................... EVAP Control System Pressure SensorPST/SW ......................................................................................................................................................................... Power Steering Oil Pressure SwitchRRO2 ........................................................................................................................................................................................ Rear Heated Oxygen SensorRRO2/H ......................................................................................................................................................................... Rear Heated Oxygen Sensor HeaterSEAT .................................................................................................................................................................................................................... Power SeatSHIFT ................................................................................................................................................................................................ A/T Shift Lock SystemSROOF ...................................................................................................................................................................................................................... SunroofSRS ....................................................................................................................................................................................... Supplemental Restraint SystemS/SIG ................................................................................................................................................................................................................... Start SignalSTART .......................................................................................................................................................................................................... Starting SystemSW/V ........................................................................................................................................................................... MAP/BARO Switch Solenoid ValveTAIL/L ..................................................................................................................................................................... Parking, License, Tail and Stop LampsT/TOW ................................................................................................................................................................................................................ Trailer TowTFTS ..................................................................................................................................................................................... Tank Fuel Temperature SensorTHEFT ............................................................................................................................................................................................... Theft Warning SystemTPS .................................................................................................................................................................................................. Throttle Position SensorTP/SW ............................................................................................................................................................................................. Throttle Position SwitchTURN .................................................................................................................................................................... Turn Signal and Hazard Warning LampsVENT/V ........................................................................................................................................................................ EVAP Canister Vent Control Valve
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VSS ..................................................................................................................................................................................................... Vehicle Speed SensorWARN .......................................................................................................................................................................................................... Warning LampsWINDOW ..................................................................................................................................................................................................... Power WindowWIPER ............................................................................................................................................................................................ Front Wiper and WasherWIP/R .......................................................................................................................................... Rear Wiper and Washer (Except for Glass Hatch Model)WIP/R ..................................................................................................................................................... Rear Wiper and Washer (For Glass Hatch Model)
Diagram Instructions
FINDING ELECTRICAL DIAGRAMS
Electrical diagrams can be found by selecting the specific component or by selecting diagrams at vehicle level.
REFERENCED DIAGRAMS
In many instances electrical diagrams will refer you to another electrical diagram to complete the circuit. These referenced electrical diagrams can befound at vehicle level under "Diagrams".
DIAGRAM IDENTIFICATION
The referenced electrical diagrams are displayed by system:
AT-DIAGRAMS...............Automatic TransmissionBR-DIAGRAMS...............Brake SystemEC-DIAGRAMS...............Engine Control SystemEL-DIAGRAMS...............Electrical SystemHA-DIAGRAMS...............Heater And Air ConditionerRS-DIAGRAMS...............Restraint System
Introduction
In general, testing electrical circuits is an easy task if approached logically. Before beginning, it is important to have all available information on thesystem to be tested. Also, get a thorough understanding of system operation. Then you will be able to use the appropriate equipment and follow thecorrect test procedure.You may have to simulate vehicle vibrations while testing electrical components. Gently shake the wiring harness or electrical component to do this.
OPEN A circuit is open when there is no continuity through a section of the circuit.
SHORT There are two types of shorts.
^ SHORT CIRCUIT When 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.
Refer to "How to Probe Terminal" to probe or check terminal.NOTE:
Testing For "OPENS" In the Circuit
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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 thediagnosis process. Drawing the sketch will also reinforce your working knowledge of the system.
Continuity check method Digital Multimeter (DMM)
The continuity check is used to find an open in the circuit. The set on the resistance function will indicate an opencircuit as over limit (OL, no beep tone or no ohms symbol). Make sure no power is supplied to the checked component. Always start with theDMM at the highest resistance level.To help in understanding the diagnosis of open circuits please refer to the image above.1. Disconnect the battery negative cable.2. Start at one end of the circuit and work your way to the other end (At the fuse block in this example).3. Connect one probe of the DMM to the fuse block terminal on the load side.
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4. 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. It there were an open in the circuit, the DMM would indicate an over limit or infinite resistance condition (point A).
5. Connect the probes between SW1 and the relay. 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 B).
6. 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 above example.
Voltage check method
To help in understanding the diagnosis of open circuits please refer to the previous image.In any powered circuit, an open can be found by methodically checking the system for voltage. This is done by switching the DMM to the voltagefunction.1. Connect one probe of the DMM to a known good ground.2. Begin probing at one end of the circuit and work your way to the other end.3. 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).
4. 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).
5. 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 above example.
Testing For "SHORTS" In the Circuit
Resistance check method
1. Disconnect the battery negative cable and remove the blown fuse.2. Disconnect all loads (SW1 open, relay disconnected and solenoid disconnected) powered through the fuse.3. Connect one probe of the ohmmeter to the load side of the fuse terminal. Connect the other probe to a known good ground.4. 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.
5. 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.
6. 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.
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