2008 NISSAN TEANA check engine

GI-34
< BASIC INSPECTION >
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
BASIC INSPECTION
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
Work FlowINFOID:0000000003852793
WORK FLOW
Control Units and Electrical PartsINFOID:0000000003852794
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.
SGI838
STEP DESCRIPTION
STEP 1Get detailed information about the conditions and the environment when the incident occurred.
The following are key pieces of information required to make a good analysis:
WHATVehicle Model, Engine, Transmission/Transaxle and the System (i.e. Radio).
WHENDate, Time of Day, Weather Conditions, Frequency.
WHERERoad Conditions, Altitude and Traffic Situation.
HOWSystem Symptoms, Operating Conditions (Other Components Interaction).
Service History and if any After Market Accessories have been installed.
STEP 2Operate the system, road test if necessary.
Verify the parameter of the incident.
If the problem cannot be duplicated, refer to “Incident Simulation Tests”.
STEP 3Get the proper diagnosis materials together including:
 Power Supply Routing
 System Operation Descriptions
 Applicable Service Manual Sections
 Check for any Service Bulletins
Identify where to begin diagnosis based upon your knowledge of the system operation and the customer comments.
STEP 4Inspect the system for mechanical binding, loose connectors or wiring damage.
Determine which circuits and components are involved and diagnose using the Power Supply Routing and Harness Lay-
outs.
STEP 5 Repair or replace the incident circuit or component.
STEP 6Operate the system in all modes. Verify the system works properly under all conditions. Make sure you have not inad-
vertently created a new incident during your diagnosis or repair steps.

SERVICE INFORMATION FOR ELECTRICAL INCIDENT
GI-35
< BASIC INSPECTION >
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 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.
 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.
Intermittent IncidentINFOID:0000000003852795
DESCRIPTION
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 fol-
lowing section illustrates ways to simulate the conditions/environment under which the owner experiences an
electrical incident.
The section is broken into the six following topics: Vehicle vibration
 Heat sensitive
 Freezing
 Water intrusion
 Electrical load
 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 to check for a vibration related condition. Refer to the following illustra-
tion.
Connector & Harness
SAIA0255E
SEF348N

GI-36
< BASIC INSPECTION >
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
Determine which connectors and wiring harness would affect the electrical system you are inspecting. Gently
shake each connector and harness while 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 termi-
nals. A visual inspection may not reveal this without disconnecting the connector. If the problem occurs inter-
mittently, perhaps the problem is caused by corrosion. It is a good idea to disconnect, inspect and clean the
terminals on related connectors in the system.
Sensor & Relay
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. (Refer to Ground
Inspection described later.) 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 the
wiring for continuity.
Behind the Instrument Panel
An improperly routed or improperly clamped harness can become pinched during accessory installation. Vehi-
cle vibration can aggravate a harness which 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 wiring runs under seating areas, inspect wire routing for possible damage or
pinching.
HEAT SENSITIVE
 The customer's concern 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 sensitive condition.
 To determine if an electrical component is heat sensitive, heat the
component with a heat gun or equivalent.
CAUTION:
Do not heat components above 60°C (140°).
 If incident occurs while heating the unit, either replace or properly
insulate the component.
FREEZING
SGI839
SGI842

CONSULT-III/GST CHECKING SYSTEM
GI-43
< BASIC INSPECTION >
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PCONSULT-III/GST CHECKING SYSTEM
DescriptionINFOID:0000000003852797
 When CONSULT-III/GST is connected with a data link connector
(A) equipped on the vehicle side, it will communicate with the con-
trol unit equipped in the vehicle and then enable various kinds of
diagnostic tests.
 Refer to “CONSULT-III Software Operation Manual” for more infor-
mation.
CONSULT-III Function and System Application*1INFOID:0000000003852798
x: Applicable
*1: If GST application is equipped, functions in accordance with SAE J1979 and ISO 15031-5 can be used.
CONSULT-III/GST Data Link Connector (DLC) CircuitINFOID:0000000003852799
INSPECTION PROCEDURE
If the CONSULT-III/GST cannot diagnose the system properly, check the following items.
1 : Instrument driver lower panel
JPAIA0313GB
Diagnostic test mode Function
ENGINE
TRANSMISSION
AIR BAG
METER/M&A
BCM
AUTO DRIVE POS.
ABS
ABS (Including VDC)
IPDM E/R
HEAD LAMP LEVELIZER
MULTI AV
HVAC
Work SupportThis mode enables a technician to adjust some devices
faster and more accurately.xx- -xx-x-x-x
Self-Diagnostic Results Retrieve DTC from ECU and display diagnostic items. x x x x x x x x x x x x
Data MonitorMonitor the input/output signal of the control unit in real
time.xx - xxxxxxxxx
CAN DiagnosisThis mode displays a network diagnosis result about
CAN by a diagram.xx - xxxxxx - xx
CAN Diagnosis Support
MonitorIt monitors the status of CAN communication. x x - x x x x x x - x -
Active TestSend the drive signal from CONSULT-III to the actua-
tor. The operation check can be performed.x - - - xxxxxx - x
DTC & SRT confirma-
tionThe status of system monitoring tests and the self-diag-
nosis status/result can be confirmed.x-----------
ECU IdentificationDisplay the ECU identification number (part number
etc.) of the selected system.xx - - xxxxxxxx
Function TestThis mode can show results of self-diagnosis of ECU
with either "OK" or "NG". For engine, more practical
tests regarding sensors/switches and/or actuators are
available.xxx---xx----
Configuration Function to READ/WRITE vehicle configuration - - - - x - - - - x - -
Special FunctionOther results or histories, etc. that are recorded in ECU
are displayed.-xxx--------

HA-8
< SYMPTOM DIAGNOSIS >
REFRIGERATION SYSTEM SYMPTOMS
SYMPTOM DIAGNOSIS
REFRIGERATION SYSTEM SYMPTOMS
Trouble Diagnosis For Unusual PressureINFOID:0000000003795806
Diagnose using a manifold gauge whenever the system’s high and/or low side pressure(s) is/are unusual. The
marker above the gauge scale in the following tables indicates the standard pressure range. Refer to the
above table (Ambient air temperature-to-operating pressure table) since the standard pressure, however, dif-
fers from vehicle to vehicle.
Symptom TableINFOID:0000000003795807
Gauge indication Refrigerant cycle Probable cause Corrective action
Both high and low-pressure sides
are too high.The pressure returns to nor-
mal and is reduced soon after
water is splashed on con-
denser.Excessive refrigerant charge in
refrigeration cycle.Reduce refrigerant until speci-
fied pressure is obtained.
Air suction by cooling fan is in-
sufficient.Insufficient condenser cooling
performance.
↓
1. Condenser fins are
clogged.
2. Improper fan rotation of
cooling fan. Clean condenser.
 Check and repair cooling fan
if necessary.
 Low-pressure pipe is not
cold.
 When the compressor is
stopped the high-pressure
reading quickly drops by
approximately 196 kPa
(1.96 bar, 2 kg/cm
2, 28 psi).
It then decreases gradually
thereafter.Poor heat exchange in con-
denser
(After compressor operation
stops, high-pressure decreas-
es too slowly).
↓
Air in refrigeration cycle.Evacuate repeatedly and re-
charge system.
Engine tends to overheat.Engine cooling systems mal-
function.Check and repair each engine
cooling system.
 An area of the low-pressure
pipe is colder than areas
near the evaporator outlet.
 Low-pressure pipe is some-
times covered with frost. Excessive liquid refrigerant
on low-pressure side.
 Excessive refrigerant dis-
charge flow.
 Expansion valve is slightly
open compared with the
specification.
↓
Improper expansion valve ad-
justment.Replace expansion valve.
High-pressure side is too high and
low-pressure side is too low.
Upper side of condenser and
high-pressure side are hot,
however, the liquid tank is not
very hot.High-pressure tube or parts lo-
cated between compressor
and condenser are clogged or
crushed. Check and repair or replace
malfunctioning parts.
 Check lubricant for contami-
nation.
AC359A
AC360A

COMPRESSOR
HA-19
< PRECAUTION >
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COMPRESSOR
General PrecautionsINFOID:0000000003795891
CAUTION:
 Plug all openings to prevent moisture and foreign matter from entering.
 Store it in the same way at it is when mounted on the car when the compressor is removed.
 Follow “Maintenance of Lubricant Quantity in Compressor” exactly when replacing or repairing
compressor. Refer to HA-28, "
Maintenance of Lubricant Quantity".
 Keep friction surfaces between clutch and pulley clean. Wipe it off by using a clean waste cloth
moistened with thinner if the surface is contaminated with lubricant.
 Turn the compressor shaft by hand more than five turns in both directions after compressor service
operation. This distributes equally lubricant inside the compressor. Let the engine idle and operate
the compressor for one hour after the compressor is installed.
 Apply voltage to the new one and check for normal operation after replacing the compressor magnet
clutch.

REFRIGERANT
HA-25
< ON-VEHICLE MAINTENANCE >
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WARNING:
Never breath A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose and throat.
Use only approved recovery/recycling recharging equipment to discharge HFC-134a (R-134a) refriger-
ant. Ventilate work area before resuming service if accidental system discharge occurs. Additional
health and safety information may be obtained from refrigerant and lubricant manufacturers.
1.CHECK A/C SYSTEM
1. Check that A/C system operates normally. Refer to the following.
-HAC-8, "
Description & Inspection" (WITHOUT 7 INCH DISPLAY)
-HAC-108, "
WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM : Description & Inspection" [WITH 7
INCH DISPLAY (WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM)]
-HAC-112, "
WITH INTELLIGENT AIR CONDITIONER SYSTEM : Description & Inspection" [WITH 7 INCH
DISPLAY (WITH INTELLIGENT AIR CONDITIONER SYSTEM)]
2. Check if there is a large amount of leakage of refrigerant or oil.
CAUTION:
Never perform the lubricant return operation if a large amount of leakage of lubricant is detected.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Check for refrigerant leakage. Refer to HA-32, "
Inspection".
2.LUBRICANT RETURN OPERATION
1. Start the engine and run it as follows.
- Engine speed: Idle - 1,200 rpm
- A/C switch: ON
- Blower speed: Max. position
- Air inlet: Recirculation (REC)
- Set temperature: FULL HOT
2. Perform lubricant return operation for approximately 10 minutes.
3. Stop the engine.
>> GO TO 3.
3.CHECK RECOVERY/RECYCLING RECHARGING EQUIPMENT
1. Operate recovery/recycling recharging equipment.
CAUTION:
 Follow the instructions of the manufacturer for the handling or maintenance of the equipment.
 Never fill the equipment with undesignated refrigerant.
2. Check the gauge pressure of recovery/recycling recharging equipment.
Is there pressure?
YES >> GO TO 4.
NO >> GO TO 5.
4.DISCHARGE REFRIGERANT INSIDE PIPES
Discharge the refrigerant from the high-pressure hose and low-pressure hose of recovery/recycling recharging
equipment.
>> GO TO 5.
5.CONNECT RECOVERY/RECYCLING RECHARGING EQUIPMENT
1. Remove the service valve caps from the vehicle.
2. Connect recovery/recycling recharging equipment to the service valves.
>> GO TO 6.
6.DISCHARGE REFRIGERANT FROM THE VEHICLE
Operate recovery/recycling recharging equipment to discharge the refrigerant from the vehicle.

HA-28
< ON-VEHICLE MAINTENANCE >
LUBRICANT
LUBRICANT
Maintenance of Lubricant QuantityINFOID:0000000003795916
The lubricant in the compressor circulates through the system the refrigerant. Add lubricant to compressor
when replacing any component or after a large refrigerant leakage occurred. It is important to maintain the
specified amount.
If lubricant quantity is not maintained properly, the following malfunctions may result:
 Lack of lubricant: May lead to a seized compressor.
 Excessive lubricant: Inadequate cooling (thermal exchange interference)
LUBRICANT
LUBRICANT RETURN OPERATION
Adjust the lubricant quantity according to the test group shown below.
1.CHECK LUBRICANT RETURN OPERATION
Can lubricant return operation be performed?
 A/C system works normally.
 There is no evidence of a large amount of lubricant leakage.
CAUTION:
Never perform the lubricant return operation if excessive lubricant leakage is detected.
Is it successful?
YES >> GO TO 2.
NO >> GO TO 3.
2.PERFORM LUBRICANT RETURN OPERATION
1. Start the engine, and set to the following conditions:
- Engine speed: Idling to 1,200 rpm
- A/C switch: ON
- Blower speed: Max. position
- Set temperature: FULL HOT
- Intake position: Recirculation (REC)
2. Perform lubricant return operation for approximately 10 minutes.
3. Stop the engine.
>> GO TO 3.
3.CHECK REPLACEMENT PART
Should the compressor be replaced?
YES >> Refer to HA-29, "Lubricant Adjusting Procedure for Compressor Replacement".
NO >> Refer to HA-28, "
Lubricant Adjusting Procedure for Components Replacement Except Compres-
sor".
Lubricant Adjusting Procedure for Components Replacement Except Compressor
INFOID:0000000003795917
Add the correct amount of lubricant to the system after replacing any of the following major components.
Amount of lubricant to be added:Name : NISSAN A/C System Oil Type S
Part replacedLubricant to be added to system
Remarks
Amount of lubricant
m (Imp fl oz.)
Evaporator 75 (2.6) —
Condenser 35 (1.2) —
Liquid tank 10 (0.4) —