2007 NISSAN TIIDA blower

EC-992
< ECU DIAGNOSIS >[MR18DE]
ECM
*: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they differ from
ECM terminals voltage signal.HO2S2 HTR (B1) Engine speed: Below 3,600 rpm after the following conditions are met.
- Engine: After warming up
- Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no loadON
 Engine speed: Above 3,600 rpm OFF
VEHICLE SPEED Turn drive wheels and compare CONSULT-III value with the speedometer in-
dication.Almost the same speed as
the speedometer indication
IDL A/V LEARN  Engine: runningIdle air volume learning has not been per-
formed yet.YET
Idle air volume learning has already been
performed successfully.CMPLT
O2SEN HTR DTY Engine coolant temperature when engine started: More than 80°C (176°F)
 Engine speed: below 3,600 rpmApprox. 30%
AC PRESS SEN Engine: Idle
 Both A/C switch and blower fan switch: ON (Compressor operates)1.0 - 4.0V
VHCL SPEED SE Turn drive wheels and compare CONSULT-III value with the speedometer in-
dication.Almost the same speed as
the speedometer indication
SET VHCL SPD  Engine: Running ASCD: OperatingThe preset vehicle speed is
displayed
MAIN SW  Ignition switch: ONMAIN switch: Pressed ON
MAIN switch: Released OFF
CANCEL SW  Ignition switch: ONCANCEL switch: Pressed ON
CANCEL switch: Released OFF
RESUME/ACC SW  Ignition switch: ONRESUME/ACCELERATE switch:
PressedON
RESUME/ACCELERATE switch: Re-
leasedOFF
SET SW  Ignition switch: ONSET/COAST switch: Pressed ON
SET/COAST switch: Released OFF
BRAKE SW1
(ASCD brake switch) Ignition switch: ONBrake pedal and clutch pedal: Fully re-
leasedON
Brake pedal and/or clutch pedal: Slightly
depressedOFF
BRAKE SW2
(Stop lamp switch) Ignition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
VHCL SPD CUT  Ignition switch: ON NON
LO SPEED CUT  Ignition switch: ON NON
AT OD MONITOR  Ignition switch: ON OFF
AT OD CANCEL  Ignition switch: ON OFF
CRUISE LAMP  Ignition switch: ONMAIN switch: Pressed at the 1st time →
at the 2nd timeON → OFF
SET LAMP MAIN switch: ON
 When vehicle speed: Between 40
km/h (25 MPH) and 180 km/h
(112 MPH)ASCD: Operating ON
ASCD: Not operating OFF Monitor Item Condition Values/Status

E C -996
< ECU DIAGNOSIS >[MR18DE]
ECM
41
(GR)48
(BR)Refrigerant pressure sen-
sorInput[Engine is running]
 Warm-up condition
 Both A/C switch and blower fan mo-
tor switch: ON (Compressor oper-
ates)1.0 - 4.0V
44
(B)—Sensor ground
(Engine coolant tempera-
ture sensor)—— —
45
(G)52
(LG)Mass air flow sensor Input[Ignition switch: ON]
 Engine stopped0.4V
[Engine is running]
 Warm-up condition
 Idle speed0.9 - 1.2V
[Engine is running]
 Warm-up condition
 Engine is revving from idle to about
4,000 rpm0.9 - 1.2 to 2.4V (Check for linear
voltage rise in response to en-
gine being increased to about
4,000 rpm.)
46
(V)55
(O)Intake air temperature
sensorInput [Engine is running]0 - 4.8V
Output voltage varies with intake
air temperature.
48
(BR)—Sensor ground
(Refrigerant pressure
sensor)—— —
49
(W)56
(B)Heated oxygen sensor 1 Input[Engine is running]
 Warm-up condition
 Engine speed: 2,000 rpm0 - 1.0V
50
(W)59
(O)Heated oxygen sensor 2 Input[Engine is running]
 Revving engine from idle to 3,000
rpm quickly after the following condi-
tions are met
- Engine: after warming up
- Keeping the engine speed between
3,500 and 4,000 rpm for 1 minute
and at idle for 1 minute under no
load0 - 1.0V
52
(LG)—Sensor ground
(Mass air flow sensor)—— —
55
(O)—Sensor ground
(Intake air temperature
sensor)—— —
56
(B)—Sensor ground
(Heated oxygen sensor 1)—— —
59
(O)—Sensor ground
(Heated oxygen sensor 2)—— — Terminal No. Description
ConditionVa l u e
(Approx.)
+-– Signal nameInput/
Output

COOLING FAN
EC-1211
< COMPONENT DIAGNOSIS >[K9K]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
COOLING FAN
DescriptionINFOID:0000000001162687
Cooling fan operates at each speed when the current flows in the cooling fan motor as follows.
Refer to EC-1097, "
System Description" for cooling fan operation.
Component Function CheckINFOID:0000000001162688
1.CHECK COOLING FAN LOW SPEED FUNCTION
1. Start engine and let it idle.
2. Turn air conditioner switch and blower fan switch ON.
3. Make sure that cooling fan operates at low speed.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Refer to EC-1211, "
Diagnosis Procedure".
2.CHECK COOLING FAN HIGH SPEED FUNCTION
1. Turn ignition switch OFF.
2. Turn air conditioner switch and blower fan switch OFF.
3. Disconnect engine coolant temperature sensor harness connector.
4. Connect 150Ω resistor to engine coolant temperature sensor harness connector.
5. Restart engine and make sure that cooling fan operates at higher speed than low speed.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Refer to EC-1211, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001162689
1.CHECK CAN COMMUNICATION LINE
Refer to LAN-33, "
CAN Communication Signal Chart".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace
2.CHECK COOLING FAN RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E44.
3. Check the voltage between IPDM E/R harness connectors and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
 50A fusible link (letter J)
 Harness for open or short between IPDM E/R and battery
>> Repair or replace malfunctioning part.
4.CHECK COOLING FAN CIRCUIT FOR OPEN AND SHORT
1. Disconnect cooling fan motor harness connector.
IPDM E/R
Ground Voltage
Connector Terminal
E44 22 Ground Battery voltage

ECM
EC-1221
< ECU DIAGNOSIS >[K9K]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
75
(G)128
(B)Camshaft position sensor Input[Engine is running]
Warm-up condition
 Idle speed
NOTE:
The pulse cycle changes de-
pending on rpm at idle.0 - 1V
[Engine is running]
Warm-up condition
 Engine speed: 2,000 rpm0 - 1V
78
(GR)74
(BR)Refrigerant pressure sensor Input[Engine is running]
Warm-up condition
 Both A/C switch and blower
fan switch: ON (Compressor
operates)Approximately2.3V
82
(GR)—Sensor ground
(EGR volume control valve)—— —
84
(W)128
(B)Crankshaft position sensor Input[Engine is running]
Warm-up condition
 Idle speed
NOTE:
The pulse cycle changes de-
pending on rpm at idle.0 - 12.5V
[Engine is running]
Warm-up condition
 Engine speed: 2,000 rpm0 - 12.5V
85
(L)82
(GR)Sensor power supply
(EGR volume control valve)—[Ignition switch: ON]Approximately 5V
86
(LG)82
(GR)EGR volume control valve
(EGR volume control valve
control position sensor)Input[Engine is running]
Warm-up condition
 Idle speed3.4V
88
(G)—Sensor ground
(Crankshaft position sensor)—— —
89
(W)74
(BR)Sensor power supply
(Refrigerant pressure sen-
sor)—[Ignition switch: ON]Approximately 5.0V Terminal No. Description
ConditionVa l u e
(Approx.)
+ -– Signal nameInput/
OutputJMBIA0698GB
JMBIA0699GB
MBIB1508E
MBIB1509E

REFRIGERATION SYSTEM
HA-17
< FUNCTION DIAGNOSIS >
C
D
E
F
G
H
J
K
L
MA
B
HA
N
O
P
7. Evaporator 8. Blower motor A. High-pressure gas
B. High-pressure liquid C. Low-pressure liquid D. Low-pressure gas
E. Suction port F. Discharge port G. Outside air

HA-26
< ON-VEHICLE MAINTENANCE >
ELECTRICAL LEAK DETECTOR
2. Connect a suitable A/C manifold gauge set to the A/C service ports.
3. Check if the A/C refrigerant pressure is at least 345 kPa (3.45 bar, 3.52 kg/cm
2, 50 psi) above 16°C. If less
than specification, recover/evacuate and recharge the system with the specified amount of refrigerant.
NOTE:
At temperatures below 16°C, leaks may not be detected since the system may not reach 345 kPa (3.45
bar, 3.52 kg/cm
2, 50 psi).
4. Perform the leak test from the high-pressure side (compressor discharge a to evaporator inlet f) to the
low-pressure side (evaporator drain hose g to shaft seal k). Refer to HA-27, "
Component". Perform a leak
check for the following areas carefully. Clean the component to be checked and move the leak detected
probe completely around the connection/component.
 Compressor
Check the fitting of high- and low-pressure flexible hoses, relief valve and shaft seal.
 Condenser
Check the fitting of high-pressure flexible hose and pipe, refrigerant pressure sensor.
 Liquid tank
Check the refrigerant connection.
 Service valves
Check all around the service valves. Ensure service valve caps are secured on the service valves (to
prevent leaks).
NOTE:
After removing A/C manifold gauge set from service valves, wipe any residue from valves to prevent any
false readings by leak detector.
 Cooling unit (Evaporator)
With engine OFF, turn blower fan on “High” for at least 15 seconds to dissipate any refrigerant trace in
the cooling unit. Wait a minimum of 10 minutes accumulation time (refer to the manufacturer’s recom-
mended procedure for actual wait time) before inserting the leak detector probe into the drain hose.
Keep the probe inserted for at least 10 seconds. Use caution not to contaminate the probe tip with water
or dirt that may be in the drain hose.
5. If a leak detector detects a leak, verify at least once by blowing compressed air into area of suspected
leak, then repeat check as outlined above.
6. Do not stop when one leak is found. Continue to check for additional leaks at all system components.
If no leaks are found, perform steps 7-10.
7. Start engine.
8. Set the heater A/C control as follows;
a. A/C switch: ON
b. Mode control dial position: VENT (Ventilation)
c. Intake door lever position: Recirculation
d. Max. cold temperature
e. Fan speed: High
9. Run engine at 1,500 rpm for at least 2 minutes.
10. Turn engine off and perform leak check again following steps 4
through 6 above.
Refrigerant leaks should be checked immediately after stopping
the engine. Begin with the leak detector at the compressor. The
pressure on the high-pressure side will gradually drop after
refrigerant circulation stops and pressure on the low-pressure
side will gradually rise, as shown in the graph. Some leaks are
more easily detected when pressure is high.
11. Before connecting recovery/recycling equipment to vehicle,
check recovery/recycling equipment gauges. No refrigerant
pressure should be displayed. If pressure is displayed, recover
refrigerant from equipment lines.
12. Discharge A/C system using approved refrigerant recovery/recycling equipment. Repair the leaking fitting
or component if necessary.
13. Evacuate and recharge A/C system and perform the leak test to confirm no refrigerant leaks.
14. Perform A/C performance test to ensure system works properly.
SHA839E

HAC-1
VENTILATION, HEATER & AIR CONDITIONER
C
D
E
F
G
H
J
K
L
M
SECTION HAC
A
B
HAC
N
O
P
CONTENTS
HEATER & AIR CONDITIONING CONTROL SYSTEM
MANUAL AIR CONDITIONER
BASIC INSPECTION ....................................
5
DIAGNOSIS AND REPAIR WORKFLOW ..........5
How to Perform Trouble Diagnosis For Quick and
Accurate Repair ........................................................
5
INSPECTION AND ADJUSTMENT .....................6
Operational Check ....................................................6
FUNCTION DIAGNOSIS ...............................8
FUNCTION INFORMATION ................................8
Component Part Location .........................................8
REFRIGERATION SYSTEM ..............................10
Refrigerant Cycle ....................................................10
Refrigerant System Protection ................................10
AIR CONDITIONER CONTROL .........................11
System Diagram ......................................................11
System Description .................................................11
Discharge Air Flow ..................................................11
Switches And Their Control Function ......................12
Component Description ...........................................13
CAN COMMUNICATION SYSTEM ....................14
System Description .................................................14
DIAGNOSIS SYSTEM (BCM) ............................15
CONSULT-III Function (BCM) .................................15
COMPONENT DIAGNOSIS .........................16
MODE DOOR .....................................................16
Mode Door Diagnostic Procedure ...........................16
AIR MIX DOOR ...................................................17
Air Mix Door Diagnostic Procedure .........................17
INTAKE DOOR ...................................................18
Intake Door Diagnostic Procedure ..........................18
BLOWER MOTOR ............................................19
Front Blower Motor Component Function Check ....19
Front Blower Motor Diagnosis Procedure ................19
MAGNET CLUTCH ...........................................23
System Description ..................................................23
Magnet Clutch Component Function Check ............23
Magnet Clutch Diagnosis Procedure .......................24
INTAKE SENSOR .............................................30
Component Inspection .............................................30
Intake Sensor Diagnosis Procedure ........................30
Intake Sensor Component Inspection .....................31
PTC HEATER CONTROL SYSTEM .................33
PTC HEATER (300 WATT) ........................................33
PTC HEATER (300 WATT) : PTC Heater System
Description ...............................................................
33
PTC HEATER (300 WATT) : PTC Heater Compo-
nent Description .......................................................
34
PTC HEATER (300 WATT) : PTC Heater (300
Watt) Diagnosis Procedure ......................................
35
PTC HEATER (300 WATT) : PTC Heater (300
Watt) Component Inspection ...................................
41
PTC HEATER (1500 WATT) ......................................43
PTC HEATER (1500 WATT) : System Description ....43
PTC HEATER (1500 WATT) : Component De-
scription ...................................................................
44
PTC HEATER (1500 WATT) : PTC Heater (1500
Watt) Diagnosis Procedure ......................................
45
PTC HEATER (1500 WATT) : PTC Heater (1500
Watt) Component Inspection ...................................
50
ECU DIAGNOSIS .........................................53
AIR CONDITIONER CONTROL ........................53
Reference Value ......................................................53
Wiring Diagram - Heater Control (without A/C) - .....54
Wiring Diagram - Air Conditioner Control - ..............56

HAC-2
PTC HEATER CONTROL SYSTEM ..................63
PTC HEATER (300 WATT) .......................................63
PTC HEATER (300 WATT) : Wiring Diagram -
PTC Heater (300 Watt) - .........................................
63
PTC HEATER (1500 WATT) .....................................67
PTC HEATER (1500 WATT) : Wiring Diagram -
PTC Heater (1500 Watt) - .......................................
68
SYMPTOM DIAGNOSIS .............................72
AIR CONDITIONER CONTROL ........................72
Symptom Matrix Chart ..........................................72
INSUFFICIENT COOLING .................................73
Component Function Check ...................................73
Performance Test Diagnoses .................................74
Performance Chart .................................................75
Test Reading ..........................................................76
Trouble Diagnoses for Unusual Pressure ...............77
INSUFFICIENT HEATING .................................81
Component Function Check ...................................81
NOISE ................................................................83
Component Function Check ...................................83
PRECAUTION .............................................84
PRECAUTIONS .................................................84
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .................................................................
84
Precaution for Procedures Without Cowl Top Cov-
er ............................................................................
84
Working with HFC-134a (R-134a) ..........................84
Precaution for Service Equipment ..........................85
AUTO AIR CONDITIONER (W/O NAVI)
BASIC INSPECTION ...................................
86
DIAGNOSIS AND REPAIR WORKFLOW .........86
How to Perform Trouble Diagnosis For Quick And
Accurate Repair ......................................................
86
INSPECTION AND ADJUSTMENT ...................87
Operational Check ..................................................87
FUNCTION DIAGNOSIS .............................89
FUNCTION INFORMATION ..............................89
Component Part Location .......................................89
REFRIGERATION SYSTEM ..............................91
Refrigerant Cycle ....................................................91
Refrigerant System Protection ................................91
AUTOMATIC AIR CONDITIONER SYSTEM .....92
Control System Diagram ........................................92
Control System Description ....................................92
Discharge Air Flow .................................................94
Switches And Their Control Function ......................95
CAN COMMUNICATION SYSTEM ...................96
System Description .................................................96
DIAGNOSIS SYSTEM (BCM) ............................97
CONSULT-III Function (BCM) ................................97
SELF-DIAGNOSIS FUNCTION .........................98
Front Air Control Self-Diagnosis .............................98
A/C System Self-Diagnosis Code Chart ...............104
COMPONENT DIAGNOSIS ......................106
MODE DOOR MOTOR .....................................106
System Description ...............................................106
Mode Door Motor Component Function Check ....107
Mode Door Motor Diagnosis Procedure ................109
AIR MIX DOOR MOTOR ..................................110
System Description ...............................................110
Air Mix Door Motor Component Function Check ..111
Air Mix Door Motor Diagnosis Procedure ..............112
INTAKE DOOR MOTOR ...................................114
System Description ...............................................114
Intake Door Motor Component Function Check ....115
Intake Door Motor Diagnosis Procedure ...............116
BLOWER MOTOR CONTROL SYSTEM .........118
System Description ...............................................118
Front Blower Motor Component Function Check ..119
Front Blower Motor Diagnosis Procedure .............120
Front Blower Motor Component Inspection ..........123
MAGNET CLUTCH ...........................................124
System Description ...............................................124
Magnet Clutch Component Function Check .........124
Magnet Clutch Diagnosis Procedure ....................125
AMBIENT SENSOR ..........................................130
Component Description ........................................130
Ambient Sensor Diagnosis Procedure ..................130
Ambient Sensor Component Inspection ...............131
IN-VEHICLE SENSOR ......................................133
Component Description ........................................133
In-Vehicle Sensor Diagnosis Procedure ...............133
In-Vehicle Sensor Component Inspection .............135
SUNLOAD SENSOR ........................................136
System Description ...............................................136
Sunload Sensor Diagnosis Procedure ..................136
Sunload Component Inspection ............................137
INTAKE SENSOR .............................................139
Component Inspection ..........................................139
Intake Sensor Diagnosis Procedure .....................139
Intake Sensor Component Inspection ...................140
PTC HEATER CONTROL SYSTEM .................142