coolant temperature NISSAN TEANA 2008 Repair Manual

EXL-142
< ECU DIAGNOSIS >[XENON TYPE]
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE
ROOM)
Reference ValueINFOID:0000000003894273
VALUES ON THE DIAGNOSIS TOOL
Monitor Item Condition Value/Status
MOTOR FAN REQ Engine idle speedChanges depending on engine
coolant temperature, air conditioner
operation status, vehicle speed,
etc.1/2/3/4
AC COMP REQ Engine runningA/C switch OFF Off
A/C switch ON
(Compressor is operating)On
TAIL&CLR REQLighting switch OFF Off
Lighting switch 1ST, 2ND, HI or AUTO (Light is illuminated) On
HL LO REQLighting switch OFF Off
Lighting switch 2ND HI or AUTO (Light is illuminated) On
HL HI REQLighting switch OFF Off
Lighting switch HI On
FR FOG REQLighting switch 2ND or
AUTO (Light is illuminated)Front fog lamp switch OFF Off
Front fog lamp switch ON On
FR WIP REQ Ignition switch ONFront wiper switch OFF Stop
Front wiper switch INT 1LOW
Front wiper switch LO Low
Front wiper switch HI Hi
WIP AUTO STOP Ignition switch ONFront wiper stop position STOP P
Any position other than front wiper
stop positionACT P
WIP PROT Ignition switch ONFront wiper operates normally Off
Front wiper stops at fail-safe opera-
tionBLOCK
IGN RLY1 -REQIgnition switch OFF or ACC Off
Ignition switch ON On
IGN RLYIgnition switch OFF or ACC Off
Ignition switch ON On
PUSH SWRelease the push-button ignition switch Off
Press the push-button ignition switch On
INTER/NP SW Ignition switch ONSelector lever in any position other
than P or NOff
Selector lever in P or N position On
ST RLY CONTIgnition switch ON Off
At engine cranking On
IHBT RLY -REQIgnition switch ON Off
At engine cranking On

EXL-314
< ECU DIAGNOSIS >[HALOGEN TYPE]
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE
ROOM)
Reference ValueINFOID:0000000003894350
VALUES ON THE DIAGNOSIS TOOL
Monitor Item Condition Value/Status
MOTOR FAN REQ Engine idle speedChanges depending on engine
coolant temperature, air conditioner
operation status, vehicle speed,
etc.1/2/3/4
AC COMP REQ Engine runningA/C switch OFF Off
A/C switch ON
(Compressor is operating)On
TAIL&CLR REQLighting switch OFF Off
Lighting switch 1ST, 2ND, HI or AUTO (Light is illuminated) On
HL LO REQLighting switch OFF Off
Lighting switch 2ND HI or AUTO (Light is illuminated) On
HL HI REQLighting switch OFF Off
Lighting switch HI On
FR FOG REQLighting switch 2ND or
AUTO (Light is illuminated)Front fog lamp switch OFF Off
Front fog lamp switch ON On
FR WIP REQ Ignition switch ONFront wiper switch OFF Stop
Front wiper switch INT 1LOW
Front wiper switch LO Low
Front wiper switch HI Hi
WIP AUTO STOP Ignition switch ONFront wiper stop position STOP P
Any position other than front wiper
stop positionACT P
WIP PROT Ignition switch ONFront wiper operates normally Off
Front wiper stops at fail-safe opera-
tionBLOCK
IGN RLY1 -REQIgnition switch OFF or ACC Off
Ignition switch ON On
IGN RLYIgnition switch OFF or ACC Off
Ignition switch ON On
PUSH SWRelease the push-button ignition switch Off
Press the push-button ignition switch On
INTER/NP SW Ignition switch ONSelector lever in any position other
than P or NOff
Selector lever in P or N position On
ST RLY CONTIgnition switch ON Off
At engine cranking On
IHBT RLY -REQIgnition switch ON Off
At engine cranking On

TERMINOLOGY
GI-17
< HOW TO USE THIS MANUAL >
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PTERMINOLOGY
SAE J1930 Terminology ListINFOID:0000000003852771
All emission related terms used in this publication in accordance with SAE J1930 are listed. Accordingly, new
terms, new acronyms/abbreviations and old terms are listed in the following chart.
NEW TERMNEW ACRONYM /
ABBREVIATIONOLD TERM
Air cleaner ACL Air cleaner
Barometric pressure BARO ***
Barometric pressure sensor-BCDD BAROS-BCDD BCDD
Camshaft position CMP ***
Camshaft position sensor CMPS Crank angle sensor
Canister *** Canister
Carburetor CARB Carburetor
Charge air cooler CAC Intercooler
Closed loop CL Closed loop
Closed throttle position switch CTP switch Idle switch
Clutch pedal position switch CPP switch Clutch switch
Continuous fuel injection system CFI system ***
Continuous trap oxidizer system CTOX system ***
Crankshaft position CKP ***
Crankshaft position sensor CKPS ***
Data link connector DLC ***
Diagnostic test mode DTM Diagnostic mode
Diagnostic test mode selector DTM selector Diagnostic mode selector
Diagnostic test mode I DTM I Mode I
Diagnostic test mode II DTM II Mode II
Diagnostic trouble code DTC Malfunction code
Direct fuel injection system DFI system ***
Distributor ignition system DI system Ignition timing control
Early fuel evaporation-mixture heater EFE-mixture heater Mixture heater
Early fuel evaporation system EFE system Mixture heater control
Electrically erasable programmable read
only memoryEEPROM ***
Electronic ignition system EI system Ignition timing control
Engine control EC ***
Engine control module ECM ECCS control unit
Engine coolant temperature ECT Engine temperature
Engine coolant temperature sensor ECTS Engine temperature sensor
Engine modification EM ***
Engine speed RPM Engine speed
Erasable programmable read only memory EPROM ***
Evaporative emission canister EVAP canister Canister
Evaporative emission system EVAP system Canister control solenoid valve
Exhaust gas recirculation valve EGR valve EGR valve

HAC-34
< FUNCTION DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
BLOWER MOTOR CONTROL SYSTEM
BLOWER MOTOR CONTROL SYSTEM
System DiagramINFOID:0000000003846315
System DescriptionINFOID:0000000003846316
Blower speed is automatically controlled by the temperature setting, ambient temperature, in-vehicle tempera-
ture, intake temperature, amount of sunload and air mix door position.
By pressing the AUTO switch, the blower motor starts to gradually increase air flow volume.
When engine coolant temperature is low, the blower motor operation is delayed to prevent cool air from flow-
ing.
SYSTEM OPERATION
System Operation
 For air flow, the manual selection (1-7) with the fan control dial has priority.
 If the AUTO switch is pressed or if the DEF switch is pressed while in the OFF condition, it changes to the
automatic control by A/C auto amp.
 When increasing the air flow, it changes the duty ratio of the blower motor drive signal to prevent the air flow
from suddenly increasing.
 There are the following types of air flow control: starting air flow control, starting air flow control at low cool-
ant temperature, starting air flow control at high in-vehicle temperature, and air flow control at actuator oper-
ation in addition to manual control, normal automatic air flow control.
Normal Automatic Air Flow Control
 When the target temperature is set by the temperature control switch of A/C control, the A/C auto amp. per-
forms the calculation and decides the target according to the signal from each sensor.
 The A/C auto amp. changes the duty ratio of blower motor drive signal and controls the air flow continuously
so that the air flow becomes the target air flow.
 The minimum air flow will change according to the sunload when the air discharge outlet is VENT or B/L.
Fan Speed Control Specification
JPIIA0502GB
JPIIA0635GB

BLOWER MOTOR CONTROL SYSTEM
HAC-35
< FUNCTION DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
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HAC
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P Starting Air Flow Control
 When starting the automatic control of air flow, the system gradually increases the duty ratio of the blower
motor drive signal to prevent too much air from blowing.
 The time period from when the air flow changes from LO to HI is approximately 8 seconds.
 It becomes the starting air flow control at low coolant temperature according to the calculation result of the A/
C auto amp. and engine coolant temperature [approximately 56°C (133°F) or less] during the automatic air
flow control.
 Do not perform the starting air flow control when the air discharge outlet is set to DEF.
Starting Fan Speed Control
Start up from COLD SOAK Condition (Automatic mode)
In cold start up condition where the engine coolant temperature is below 56°C (133°F), the blower does not
operate for a short period of time (up to 150 seconds). The exact start delay time varies depending on the
ambient temperature and engine coolant temperature.
In the most extreme case (very low ambient temperature) the blower start delay is 150 seconds as described
above. After this delay, the blower will operate at low speed until the engine coolant temperature rises above
56°C (133°F), and then the blower speed increases to the objective speed.
Start up from usual or HOT SOAK Condition (Automatic mode)
The blower will begin operation momentarily after the AUTO switch is pressed. The blower speed rises gradu-
ally to the objective speed over a time period of 3 seconds or less (actual time depends on the objective
blower speed).

A/C AUTO AMP.
HAC-75
< ECU DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
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ECU DIAGNOSIS
A/C AUTO AMP.
Reference ValueINFOID:0000000003846375
VALUES ON THE DIAGNOSIS TOOL
CONSULT-III MONITOR ITEM
TERMINAL LAYOUT
PHYSICAL VALUES
Monitor item Condition Value/Status
COMP REQ SIGEngine: Run at idle after
warming up A/C switch: ON
(Compressor operation sta-
tus) On
A/C switch: OFF Off
FAN REQ SIGEngine: Run at idle after
warming up Blower fan: ON On
Blower fan: OFF Off
AMB TEMP SEN Ignition switch ON — −30 - 55°C (−22 - 131°F)
IN-VEH TEMP Ignition switch ON — −30 - 55°C (−22 - 131°F)
INT TEMP SEN Ignition switch ON — −30 - 55°C (−22 - 131°F)
SUNLOAD SEN Ignition switch ON —0 - 1045 W/m
2
(0 - 900 kcal/m2·h)
AMB SEN CAL Ignition switch ON —−30 - 55°C (−22 - 131°F)
IN-VEH CAL Ignition switch ON —−30 - 55°C (−22 - 131°F)
INT TEMP CAL Ignition switch ON —−30 - 55°C (−22 - 131°F)
SUNL SEN CAL Ignition switch ON —0 - 1045 W/m
2
(0 - 900 kcal/m2·h)
FAN DUTYEngine: Run at idle after
warming up Blower fan: ON 21 - 91%
Blower fan: OFF 0%
XM Ignition switch ON —−100 - 150°
ENG COOL TEMP Ignition switch ON —Values according to coolant
temperature
VEHICLE SPEED Driving —Equivalent to speedometer
reading
JSIIA1205ZZ

INSUFFICIENT HEATING
HAC-91
< SYMPTOM DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
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INSUFFICIENT HEATING
DescriptionINFOID:0000000003846388
Symptom
 Insufficient heating
 No warm air comes out. (Air flow volume is normal.)
Inspection procedureINFOID:0000000003846389
1.CHECK COOLING SYSTEM
1. Check engine coolant level and check for leakage. Refer to CO-8, "
Inspection".
2. Check radiator cap. Refer to CO-12, "
RADIATOR CAP : Inspection".
3. Check water flow sounds of engine coolant. Refer to CO-9, "
Refilling".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Refill the engine coolant and repair or replace the parts according to the inspection results.
2.CHECK OPERATION
1. Press temperature control switch (driver side) and raise temperature setting to 32°C (90°F) after warming
up the engine.
2. Check that warm air blows from the outlets.
Is the inspection result normal?
YES >> END.
NO >> GO TO 3.
3.CHECK SETTING OF TEMPERATURE SETTING TRIMMER
Using CONSULT-III, check the setting of “TEMP SET CORRECT” on “WORK SUPPORT” of HVAC. Refer to
HAC-10, "
Temperature Setting Trimmer".
1. Check that the temperature setting trimmer is set to “− direction”.
NOTE:
The control temperature can be set by the temperature setting trimmer.
2. Set temperature control switch to “0”.
Are the malfunction solved?
YES >> Perform the setting separately if necessary. END.
NO >> GO TO 4.
4.CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III
1. Using CONSULT-III, perform “SELF-DIAGNOSIS RESULTS” of HVAC.
2. Check if any DTC is displayed in the trouble diagnosis results.
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
HAC-42, "
DTC Logic" or HAC-43, "DTC Logic".
Is any DTC displayed?
YES >> Perform the diagnosis that is applicable to the sensor and the door motor. Refer to HAC-85, "DTC
Index".
NO >> GO TO 5.
5.CHECK WITH ACTIVE TEST OF CONSULT-III
1. Using CONSULT-III, perform “HVAC TEST” in “ACTIVE TEST” of HVAC to check each output device.
Refer to HAC-38, "
CONSULT-III Function".
NOTE:
Perform the ACTIVE TEST after starting the engine because the compressor is operated.
2. Refer to the table and check the outlet, inlet, air flow temperature, blower motor control signal, magnet
clutch operation, and air mix ratio. Visually check each operating condition, by listening for noise, touching
air outlets with a hand, etc.

INSUFFICIENT HEATING
HAC-93
< SYMPTOM DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
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1. Check the temperature of inlet hose and outlet hose of heater core.
2. Check that the inlet side of heater core is hot and the outlet side is slightly lower than/almost equal to the
inlet side.
CAUTION:
Always perform the temperature inspection in a short period of time because the engine coolant
temperature is very hot.
Is the inspection result normal?
YES >> GO TO 9.
NO >> Replace the heater core after performing the procedures after the cooling system inspection. GO
TO 1.
9.REPLACE HEATER CORE
Replace the heater core. Refer to heater core. Refer to VTL-43, "
Exploded View".
Are the malfunction solved?
YES >> END.
NO >> Perform the procedures again after the cooling system inspection. GO TO 1.

HAC-152
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
BLOWER MOTOR CONTROL SYSTEM
BLOWER MOTOR CONTROL SYSTEM
System DiagramINFOID:0000000003884727
System DescriptionINFOID:0000000003884728
Blower speed is automatically controlled by the temperature setting, ambient temperature, in-vehicle tempera-
ture, intake temperature, amount of sunload and air mix door position.
By pressing the AUTO switch, the blower motor starts to gradually increase air flow volume.
When engine coolant temperature is low, the blower motor operation is delayed to prevent cool air from flow-
ing.
SYSTEM OPERATION
System Operation
 For air flow, the manual selection (1-7) with the fan control dial has priority.
 If the AUTO switch is pressed or if the DEF switch is pressed while in the OFF condition, it changes to the
automatic control by A/C auto amp.
 When increasing the air flow, it changes the duty ratio of the blower motor drive signal to prevent the air flow
from suddenly increasing.
 There are the following types of air flow control: starting air flow control, starting air flow control at low cool-
ant temperature, starting air flow control at high in-vehicle temperature, and air flow control at actuator oper-
ation in addition to manual control, normal automatic air flow control.
Normal Automatic Air Flow Control
 When the target temperature is set by the temperature control dial of A/C control, the A/C auto amp. per-
forms the calculation and decides the target according to the signal from each sensor.
 The A/C auto amp. changes the duty ratio of blower motor drive signal and controls the air flow continuously
so that the air flow becomes the target air flow.
 The minimum air flow will change according to the sunload when the air discharge outlet is VENT or B/L.
Fan Speed Control Specification
JPIIA0502GB
JPIIA0635GB

BLOWER MOTOR CONTROL SYSTEM
HAC-153
< FUNCTION DIAGNOSIS >[WITH 7 INCH DISPLAY]
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P Starting Air Flow Control
 When starting the automatic control of air flow, the system gradually increases the duty ratio of the blower
motor drive signal to prevent too much air from blowing.
 The time period from when the air flow changes from LO to HI is approximately 8 seconds.
 It becomes the starting air flow control at low coolant temperature according to the calculation result of the A/
C auto amp. and engine coolant temperature [approximately 56°C (133°F) or less] during the automatic air
flow control.
 Do not perform the starting air flow control when the air discharge outlet is set to DEF.
Starting Fan Speed Control
Start up from COLD SOAK Condition (Automatic mode)
In cold start up condition where the engine coolant temperature is below 56°C (133°F), the blower does not
operate for a short period of time (up to 150 seconds). The exact start delay time varies depending on the
ambient temperature and engine coolant temperature.
In the most extreme case (very low ambient temperature) the blower start delay is 150 seconds as described
above. After this delay, the blower will operate at low speed until the engine coolant temperature rises above
56°C (133°F), and then the blower speed increases to the objective speed.
Start up from usual or HOT SOAK Condition (Automatic mode)
The blower will begin operation momentarily after the AUTO switch is pressed. The blower speed rises gradu-
ally to the objective speed over a time period of 3 seconds or less (actual time depends on the objective
blower speed).