ignition NISSAN TEANA 2008 Service Manual

HAC-66
< COMPONENT DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
POWER SUPPLY AND GROUND CIRCUIT
Is the inspection result normal?
YES >> GO TO 2.
NO >> Check 10A fuse (No. 3, located in the fuse block). Refer to PG-101, "
Fuse, Connector and Ter-
minal Arrangement".
 If fuse is OK, check harness for open circuit. Repair or replace if necessary.
 If fuse is NG, replace fuse and check for short circuit. Repair or replace if necessary.
2.CHECK A/C CONTROL CIRCUIT CONTINUITY
1. Turn ignition switch OFF.
2. Check continuity between A/C control harness connector and ground.
Is the inspection result normal?
YES >> Replace the A/C control.
NO >> Repair the harnesses or connectors.
A/C DISPLAY
A/C DISPLAY : Diagnosis ProcedureINFOID:0000000003846371
1.CHECK A/C DISPLAY POWER SUPPLY CIRCUIT
1. Disconnect the A/C display connector.
2. Turn ignition switch ON.
3. Check voltage between A/C display harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the harnesses or connectors.
2.CHECK A/C DISPLAY CIRCUIT CONTINUITY
1. Turn ignition switch OFF.
2. Check continuity between A/C display harness connector and ground.
Is the inspection result normal?
YES >> Replace the A/C display.
NO >> Check 10A fuse (No. 3, located in the fuse block). Refer to PG-101, "
Fuse, Connector and Ter-
minal Arrangement".
 If fuse is OK, check harness for open circuit. Repair or replace if necessary.
 If fuse is NG, replace fuse and check for short circuit. Repair or replace if necessary.
A/C control
—Continuity
Connector Terminal
M95 2 Ground Existed
(+) (−)
Voltage A/C display
—
Connector Terminal
M16 6 Ground Battery voltage
A/C display
—Continuity
Connector Terminal
M16 1 Ground Existed

A/C AUTO AMP.
HAC-67
< COMPONENT DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
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A/C AUTO AMP.
DescriptionINFOID:0000000003940951
COMPONENT DESCRIPTION
A/C Auto Amp. (Air Conditioner Automatic Amplifier)
The A/C auto amp. (1) has a built-in microcomputer that processes
information sent from various sensors needed for air conditioner
operation. The air mix door motors, the mode door motor, the intake
door motor, the blower motor and the compressor are then con-
trolled.
When the various switches and temperature control dial are oper-
ated, data is input to the A/C auto amp. from the A/C control.
Component Function CheckINFOID:0000000003940952
1.CHECK OPERATION
1. Press the AUTO switch, and then check that “AUTO” is shown on the display.
2. Operate the temperature control dial (driver side). Check that the fan speed or outlet changes. (The dis-
charge air temperature or fan speed varies depending on the ambient temperature, in-vehicle tempera-
ture, and temperature setting.)
Does it operate normally?
YES >> INSPECTION END
NO >> Perform trouble diagnosis for the A/C system. Refer to HAC-67, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003940953
1.INSPECTION BY FAIL-SAFE FUNCTION
1. Turn the ignition switch ON.
2. After approximately 30 seconds, check that the air conditioner is operated by the fail-safe function (the
operation display of air conditioner is not performed). Refer to HAC-84, "
Fail-Safe".
Is the fail-safe function operated?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK A/C AUTO AMP. POWER SUPPLY CIRCUIT AND GROUND
Check A/C auto amp. power supply circuit and ground circuit. Refer to HAC-65, "
A/C AUTO AMP. : Diagnosis
Procedure".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace parts according to the inspection results.
3.CHECK A/C CONTROL SIGNAL CIRCUIT
Check the A/C control signal circuit. Refer to HAC-74, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair or replace parts according to the inspection results.
JPIIA0894ZZ

BLOWER MOTOR
HAC-69
< COMPONENT DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
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2. Check that the blower motor control signal changes according to each indicator signal.
NOTE:
 Perform the inspection of each output device after starting the engine because the compressor is oper-
ated.
 When choosing to “MODE 7”, error message is displayed but it is not malfunction.
Does it operate normally?
YES >> INSPECTION END
NO >> GO TO 3.
3.CHECK POWER SUPPLY FOR BLOWER MOTOR
1. Disconnect blower motor connector.
2. Turn ignition switch ON.
3. Check voltage between blower motor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 7.
4.CHECK BLOWER MOTOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between blower motor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair harness or connector.
5.CHECK BLOWER MOTOR CIRCUIT CONTINUITY
1. Disconnect A/C auto amp. connector.
2. Check continuity between blower motor harness connector and A/C auto amp. harness connector.
Is the inspection result normal?
Te s t i t e m
MODE 1 MODE 2 MODE 3 MODE 4 MODE 5 MODE 6 MODE 7
Mode door position VENT B/L1 B/L2 AUTO FOOT D/F DEF -
Intake door position REC REC 20% FRE FRE FRE FRE -
Air mix door position
(driver & passenger
side)FULL COLD FULL COLD FULL HOT FULL HOT FULL HOT FULL HOT -
Blower motor duty ratio 37% 91% 65% 65% 65% 91% -
Compressor (Magnet
clutch)ON ON OFF OFF ON ON -
(+) (−)
Vo l ta g e Blower motor
—
Connector Terminal
M98 1 Ground Battery voltage
Blower motor
—Continuity
Connector Terminal
M98 3 Ground Existed
Blower motor A/C auto amp.
Continuity
Connector Terminal Connector Terminal
M98 2 M50 32 Existed

HAC-70
< COMPONENT DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
BLOWER MOTOR
YES >> GO TO 6.
NO >> Repair harness or connector.
6.CHECK A/C AUTO AMP. OUTPUT SIGNAL
1. Reconnect blower motor connector and A/C auto amp. connector.
2. Turn ignition switch ON.
3. Set MODE switch to the VENT position.
4. Check the output waveform between blower motor harness connector and ground using an oscilloscope,
while varying the fan speed from 1 to 7.
Is the inspection result normal?
YES >> Replace the blower motor.
NO >> Replace the A/C auto amp.
7.CHECK POWER VOLTAGE OF BLOWER RELAY
1. Turn the ignition switch OFF.
2. Remove the blower relay. Refer to PG-101, "
Fuse, Connector and Terminal Arrangement".
3. Turn the ignition switch ON.
4. Check the voltage between blower relay fuse block side terminal and ground. Refer to PG-101, "
Fuse,
Connector and Terminal Arrangement" for relay terminal assignment.
Is the inspection result normal?
YES >> GO TO 8.
NO >> Inspection the power supply circuit. Refer to PG-55, "
Wiring Diagram - IGNITION POWER SUP-
PLY -".
8.CHECK BLOWER RELAY
1. Turn the ignition switch OFF.
2. Install the blower relay. Refer to PG-101, "
Fuse, Connector and Terminal Arrangement".
3. Turn the ignition switch ON.
4. Check the operating sound of blower relay.
Is the inspection result normal?
YES >> GO TO 9.
NO >> Replace the blower relay.
9.CHECK FUSE
Check 15A fuses (Nos. 21 and 22).
JPIIA1025GB
(+) (−)
Vol tag e
Blower relay —
1
Ground Battery voltage
3

HAC-72
< COMPONENT DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
MAGNET CLUTCH
MAGNET CLUTCH
DescriptionINFOID:0000000003846363
The magnet clutch drives the compressor, by an IPDM E/R signal.
Component Function CheckINFOID:0000000003846364
1.FUNCTION INSPECTION
1. Press AUTO switch.
2. “AUTO” is indicated on the display.
3. Check that the indicator of the A/C switch turns on. Check visually and by sound that the compressor is
operating (the discharge air temperature or fan speed varies depending on the ambient temperature, in-
vehicle temperature, and temperature setting).
4. Press the A/C switch.
5. Check that the indicator of the A/C switch turns OFF. Check visually and by sound that the compressor
stops.
Does it operate normally?
YES >> INSPECTION END
NO >> Perform trouble diagnosis for the compressor. Refer to HAC-72, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003846365
1.INSPECTION IN AUTO ACTIVE TEST MODE
Perform “AUTO ACTIVE TEST”. Refer to PCS-11, "
Diagnosis Description".
Does it operate normally?
YES >> GO TO 5.
NO >> GO TO 2.
2.CHECK MAGNET CLUTCH
1. Turn the ignition switch OFF.
2. Disconnect the magnet clutch connector.
3. Directly apply the battery voltage to the magnet clutch. Check for operation visually and by sound.
Does it operate normally?
YES >> GO TO 3.
NO >> Replace the compressor.
3.CHECK MAGNET CLUTCH CIRCUIT CONTINUITY
1. Turn the ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between magnet clutch harness connector and IPDM E/R harness connector.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair harness or connector.
4.CHECK FUSE
Check 10A fuse (No. 49).
NOTE:
Refer to PG-101, "
Fuse, Connector and Terminal Arrangement" for fuse location.
Is the inspection result normal?
YES >> Replace IPDM E/R.
NO >> Replace the fuse after repairing the applicable circuit.
IPDM E/R Compressor
Continuity
Connector Terminal Connector Terminal
F12 48 F18 1 Existed

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

HAC-76
< ECU DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
A/C AUTO AMP.
Te r m i n a l N o .
(Wire color)Description
ConditionVa l u e
(Approx.)
+−Signal nameInput/
Output
6
(L)Ground TX (AMP > SW·DISP) Input — —
7
(P)Ground RX (SW > AMP) Output — —
10
(L/R)Ground LAN signalInput/
Output—
11
(L/W)GroundPower supply for each door
motorInput Ignition switch ON Battery voltage
15
(O)Ground Sunload sensor signal Input — —
16
(R/G)Ground Intake sensor signal Input — —
17
(V/W)Ground ACC Power supply — Ignition switch ACC Battery voltage
19
(B)Ground Ground — Ignition switch ON 0 V
20
(G/W)Ground IGN Power supply — Ignition switch ON Battery voltage
26
(GR)GroundRear window defogger feed-
back signalInputRear window defogger switch:
OFF0 V
Rear window defogger switch:
ON12 V
27
(GR/W)GroundRear window defogger ON
signalOutput—12 V
When rear window defogger
switch is pushed.0 V
32
(L/Y)Ground Blower motor control signal Output Ignition switch ON
 Blower speed: 1st speed
(manual)
34
(P)GroundA/C auto amp. connection
recognition signalOutput Ignition switch ON 5V
35
(O/B)Ground Ambient sensor signal Input — —
36
(LG)Ground In-vehicle sensor signal Input — —
37
(B/Y)Ground Sensor ground — Ignition switch ON 0 V
39
(B)Ground Ground — Ignition switch ON 0 V
40
(Y/R)Ground BATT Power supply — Ignition switch OFF Battery voltage
SJIA1453J
JSIIA0096ZZ

HAC-96
< SYMPTOM DIAGNOSIS >[WITHOUT 7 INCH DISPLAY]
MEMORY FUNCTION DOES NOT OPERATE
MEMORY FUNCTION DOES NOT OPERATE
DescriptionINFOID:0000000003846392
Symptom
 Memory function does not operate normally.
 The setting is not maintained. (It returns to the initial condition.)
Inspection procedureINFOID:0000000003846393
1.CHECK OPERATION
1. Set temperature control switch to 32°C (90°F).
2. Press the OFF switch.
3. Turn the ignition switch OFF.
4. Turn the ignition switch ON.
5. Press the AUTO switch.
6. Check that the set temperature is maintained.
Is the inspection result normal?
YES >> END.
NO >> GO TO 2.
2.CHECK POWER SUPPLY AND GROUND CIRCUIT OF A/C AUTO AMP.
Check power supply and ground circuit of the A/C auto amp. Refer to HAC-65, "
A/C AUTO AMP. : Diagnosis
Procedure".
Is the inspection result normal?
YES >> Replace the A/C auto amp.
NO >> Repair or replace malfunctioning parts.

PRECAUTIONS
HAC-97
< PRECAUTION >[WITHOUT 7 INCH DISPLAY]
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000003854497
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the “SRS AIRBAG” and
“SEAT BELT” of this Service Manual.
WARNING:
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
 Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIRBAG”.
 Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Ser-
vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
connectors.
Precaution Necessary for Steering Wheel Rotation after Battery Disconnect
INFOID:0000000003854498
NOTE:
 Before removing and installing any control units, first turn the push-button ignition switch to the LOCK posi-
tion, then disconnect both battery cables.
 After finishing work, confirm that all control unit connectors are connected properly, then re-connect both
battery cables.
 Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If a DTC is detected, perform trouble diagnosis according to self-diagnosis results.
This vehicle is equipped with a push-button ignition switch and a steering lock unit.
If the battery is disconnected or discharged, the steering wheel will lock and cannot be turned.
If turning the steering wheel is required with the battery disconnected or discharged, follow the procedure
below before starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.
2. Turn the push-button ignition switch to ACC position.
(At this time, the steering lock will be released.)
3. Disconnect both battery cables. The steering lock will remain released with both battery cables discon-
nected and the steering wheel can be turned.
4. Perform the necessary repair operation.
5. When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button ignition switch is turned to LOCK position.)
6. Perform self-diagnosis check of all control units using CONSULT-III.

HAC-108
< BASIC INSPECTION >[WITH 7 INCH DISPLAY]
INSPECTION AND ADJUSTMENT
INSPECTION AND ADJUSTMENT
WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM
WITHOUT INTELLIGENT AIR CONDITIONER SYSTEM : Description & Inspection
INFOID:0000000003884686
DESCRIPTION
The purpose of the operational check is to check that the individual system operates normally.
INSPECTION PROCEDURE
1.CHECK MEMORY FUNCTION
1. Start the engine.
2. Operate the temperature control dial (driver side) and raise the temperature setting to 32°C (90°F).
3. Press the OFF switch.
4. Turn the ignition switch OFF.
5. Turn the ignition switch ON.
6. Press the AUTO switch.
7. Check that the temperature setting before turning the ignition switch OFF is stored.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Memory function malfunction: HAC-236, "
Inspection procedure".
2.CHECK BLOWER MOTOR SPEED
1. Start the engine.
2. Operate the fan control dial. Check that the fan speed changes. Check the operation for all fan speeds.
3. Set the fan speed to speed 7.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Blower motor system malfunction: HAC-193, "
Diagnosis Procedure".
3.CHECK DISCHARGE AIR
1. Press the MODE switch and the DEF switch.
2. Each position indicator should change shape.
3. Confirm that discharge air comes out according to the air distribution table. Refer to HAC-122, "
WITHOUT
INTELLIGENT AIR CONDITIONER SYSTEM : System Description".
NOTE:
Confirm that the compressor clutch is engaged (sound or visual inspection) and the intake door position is at
the FRE when DEF is selected.
Is the inspection result normal?
YES >> GO TO 4.Conditions : Engine running at normal operating temperature
JPIIA0877GB