2007 NISSAN TIIDA Cooling

INSUFFICIENT COOLING
HAC-303
< SYMPTOM DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
C
D
E
F
G
H
J
K
L
MA
B
HAC
N
O
P
Testing must be performed as follows:
Test ReadingINFOID:0000000001547377
TEST READING
Recirculating-to-discharge Air Temperature Table
Ambient Air Temperature-to-operating Pressure Table
*1: In the blower motor low-speed control
*2: In the blower motor high-speed control
Trouble Diagnoses for Unusual PressureINFOID:0000000001547378
TROUBLE DIAGNOSIS FOR UNUSUAL PRESSURE
Vehicle condition Indoors or in the shade (in a well-ventilated place)
Doors Closed
Door window Open
Hood Open
TEMP. Max. COLD
Mode control dial
(Ventilation) set
Intake switch
(Recirculation) set
Blower speedMax. speed set
Engine speed Idle speed
Operate the air conditioning system for 10 minutes before taking measurements.
Inside air (Recirculating air) at blower assembly inlet
Discharge air temperature at center ventilator
°C (°F) Relative humidity
%Air temperature
°C (°F)
50 - 6020 (68) 7.2 - 9.1 (45 - 48)
25 (77) 11.4 - 13.8 (53 - 57)
30 (86) 15.5 - 18.4 (60 - 65)
35 (95) 20.3 - 23.7 (69 - 75)
60 - 7020 (68) 9.1 - 10.9 (48 - 52)
25 (77) 13.8 - 16.2 (57 - 61)
30 (86) 18.4 - 21.3 (65 - 70)
35 (95) 23.7 - 27.1 (75 - 81)
Ambient air
High-pressure (Discharge side)
kPa (bar, kg/cm
2, psi)Low-pressure (Suction side)
kPa (bar, kg/cm2, psi) Relative humidity
%Air temperature
°C (°F)
50 - 7020 (68)843 - 1,036 *1
(11.08 - 13.63, 8.6 - 10.6, 122 - 150)159.0 - 194.0
(1.59 - 1.94, 1.62 - 1.98, 23.1 - 28.1)
25 (77)1,094 - 1,338 *1
(10.94 - 13.38, 11.2 - 13.6, 159 - 194)196.3 - 240.0
(1.96 - 2.40, 2.00 - 2.45, 28.5 - 34.8)
30 (86)1,298 - 1,590 *1
(12.98 - 15.90, 13.2 - 16.2, 188 - 231)248.0 - 302.7
(2.48 - 3.03, 2.53 - 3.09, 36.0 - 43.9)
35 (95)1,383 - 1,688 *2
(13.83 - 16.88, 14.1 - 17.2, 201 - 245)308.8 - 377.4
(3.09 - 3.77, 3.15 - 3.85, 44.8 - 54.7)
40 (104)1,628 - 1,988 *2
(16.28 - 19.88, 16.6 - 20.3, 236 - 288)377.4 - 461.2
(3.77 - 4.61, 3.85 - 4.70, 54.7 - 66.8)

HAC-304
< SYMPTOM DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
INSUFFICIENT COOLING
Whenever system’s high and/or low side pressure(s) is/are unusual, diagnose using a manifold gauge. The
marker above the gauge scale in the following tables indicates the standard (usual) pressure range. Since the
standard (usual) pressure, however, differs from vehicle to vehicle, refer to above table (Ambient air tempera-
ture-to-operating pressure table).
Both High- and Low-pressure Sides are Too High
High-pressure Side is Too High and Low-pressure Side is Too Low
High-pressure Side is Too Low and Low-pressure Side is Too High
Gauge indication Refrigerant cycle Probable cause Corrective action
Both high- and low-pressure
sides are too high.Pressure is reduced soon af-
ter water is splashed on con-
denser.Excessive refrigerant charge in refrig-
eration cycle.Reduce refrigerant until
specified pressure is ob-
tained.
Air suction by cooling fan is in-
sufficient.Insufficient condenser cooling perfor-
mance.
↓
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 compressor is
stopped high-pressure val-
ue quickly drops by approx-
imately 196 kPa (1.96 bar, 2
kg/cm
2, 28 psi). It then de-
creases gradually thereaf-
ter.Poor heat exchange in condenser
(After compressor operation stops,
high-pressure decreases too slowly.).
↓
Air in refrigeration cycle.Evacuate repeatedly and
recharge system.
Engine tends to overheat. Engine cooling systems malfunction.Check and repair each en-
gine cooling system.
 An area of the low-pressure
pipe is colder than areas
near the evaporator outlet.
 Plates are sometimes cov-
ered with frost. Excessive liquid refrigerant on low-
pressure side.
 Excessive refrigerant discharge
flow.
 Expansion valve is open a little
compared with the specification.
↓
Improper expansion valve adjust-
ment.Replace expansion valve.
AC359A
Gauge indication Refrigerant cycle Probable cause Corrective action
High-pressure side is too high
and low-pressure side is too low.
Upper side of condenser and
high-pressure side are hot,
however, liquid tank is not so
hot.High-pressure tube or parts located
between compressor and condenser
are clogged or crushed. Check and repair or re-
place malfunctioning
parts.
 Check oil for contami-
nation.
AC360A

INSUFFICIENT COOLING
HAC-305
< SYMPTOM DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
C
D
E
F
G
H
J
K
L
MA
B
HAC
N
O
P Both High- and Low-pressure Sides are Too Low
Low-pressure Side Sometimes Becomes Negative
Gauge indication Refrigerant cycle Probable cause Corrective action
High-pressure side is too low
and low-pressure side is too
high.High- and low-pressure sides
become equal soon after com-
pressor operation stops.Compressor pressure operation
is improper.
↓
Damaged inside compressor
packings.Replace compressor.
No temperature difference be-
tween high- and low-pressure
sides.Compressor pressure operation
is improper.
↓
Damaged inside compressor
packings.Replace compressor.
AC356A
Gauge indication Refrigerant cycle Probable cause Corrective action
Both high- and low-pressure
sides are too low. There is a big temperature dif-
ference between liquid tank
outlet and inlet. Outlet tem-
perature is extremely low.
 Liquid tank inlet and expan-
sion valve are frosted.Liquid tank inside is slightly
clogged. Replace liquid tank.
 Check oil for contamination.
 Temperature of expansion
valve inlet is extremely low as
compared with areas near liq-
uid tank.
 Expansion valve inlet may be
frosted.
 Temperature difference oc-
curs somewhere in high-pres-
sure side.High-pressure pipe located be-
tween liquid tank and expansion
valve is clogged. Check and repair malfunc-
tioning parts.
 Check oil for contamination.
Expansion valve and liquid tank
are warm or only cool when
touched.Low refrigerant charge.
↓
Leaking fittings or componentsCheck refrigerant for leaks.
Refer to HA-22, "
Checking of
Refrigerant Leaks".
There is a big temperature dif-
ference between expansion
valve inlet and outlet while the
valve itself is frosted.Expansion valve closes a little
compared with the specification.
↓
1. Improper expansion valve
adjustment.
2. Malfunctioning expansion
valve.
3. Outlet and inlet may be
clogged. Remove foreign particles by
using compressed air.
 Replace expansion valve.
 Check oil for contamination.
An area of the low-pressure pipe
is colder than areas near the
evaporator outlet.Low-pressure pipe is clogged or
crushed. Check and repair malfunc-
tioning parts.
 Check oil for contamination.
Air flow volume is not enough or
is too low.Evaporator is frozen. Check intake sensor circuit.
Refer to HAC-229, "
Intake
Door Motor Component
Function Check".
 Replace compressor.
 Repair evaporator fins.
 Replace evaporator.
 Refer to HAC-233, "
Front
Blower Motor Component
Function Check".
AC353A

HAC-306
< SYMPTOM DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
INSUFFICIENT COOLING
Low-pressure Side Becomes Negative
Gauge indication Refrigerant cycle Probable cause Corrective action
Low-pressure side sometimes be-
comes negative. Air conditioning system does
not function and does not cy-
clically cool the compart-
ment air.
 The system constantly func-
tions for a certain period of
time after compressor is
stopped and restarted.Refrigerant does not discharge
cyclically.
↓
Moisture is frozen at expan-
sion valve outlet and inlet.
↓
Water is mixed with refrigerant. Drain water from refrigerant
or replace refrigerant.
 Replace liquid tank.
AC354A
Gauge indication Refrigerant cycle Probable cause Corrective action
Low-pressure side becomes nega-
tive.
Liquid tank or front/rear side of
expansion valve’s pipe is frost-
ed or dewed.High-pressure side is closed
and refrigerant does not flow.
↓
Expansion valve or liquid tank
is frosted.Leave the system at rest until
no frost is present. Start it
again to check whether or not
the malfunction is caused by
water or foreign particles.
 If water is the cause, initially
cooling is okay. Then the wa-
ter freezes causing a block-
age. Drain water from
refrigerant or replace refrig-
erant.
 If due to foreign particles, re-
move expansion valve and
remove the particles with dry
and compressed air (not
shop air).
 If either of the above meth-
ods cannot correct the mal-
function, replace expansion
valve.
 Replace liquid tank.
 Check oil for contamination.
AC362A

INSUFFICIENT HEATING
HAC-307
< SYMPTOM DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
C
D
E
F
G
H
J
K
L
MA
B
HAC
N
O
P
INSUFFICIENT HEATING
Component Function CheckINFOID:0000000001547379
SYMPTOM: Insufficient heating
INSPECTION FLOW
1.CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE INCREASE
1. Press the AUTO switch.
2. Turn the temperature control dial (driver) clockwise until 32° C (90° F) is displayed.
3. Check for hot air at discharge air outlets.
Can this symptom be duplicated?
YES >> GO TO 2.
NO >> Perform complete system operational check. Refer to HAC-202, "
Operational Check".
2.CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 3.
3.PERFORM SELF-DIAGNOSIS
Perform self-diagnosis. Refer to HAC-213, "
Front Air Control Self-Diagnosis".
Is the inspection results normal?
YES >> GO TO 4.
NO >> Refer to HAC-218, "
Front Air Control Self-Diagnosis Code Chart".
4.CHECK ENGINE COOLING SYSTEM
1. Check for proper engine coolant level. Refer to CO-11, "
Inspection" (HR16DE) or CO-35, "Inspection"
(HR18DE) or CO-58, "Inspection" (K9K).
2. Check hoses for leaks or kinks.
3. Check radiator cap. Refer to CO-14, "
Checking Radiator Cap" (HR16DE) CO-38, "Checking Radiator
Cap" or (HR18DE) or CO-60, "Checking Radiator Cap" (K9K).
4. Check for air in cooling system.
>> GO TO 5.
5.CHECK AIR MIX DOOR OPERATION
Check the operation of the air mix door. Refer to HAC-225, "
Air Mix Door Motor Component Function Check".
Is the inspection result normal?
YES >> GO TO 6.
NO >> Check the air mix door motor circuit. Refer to HAC-226, "
Air Mix Door Motor Diagnosis Proce-
dure".
6.CHECK AIR DUCTS
Check for disconnected or leaking air ducts.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair all disconnected or leaking air ducts.
7.CHECK HEATER HOSE TEMPERATURES
1. Start engine and warm it up to normal operating temperature.
2. Touch both the inlet and outlet heater hoses.
Is the inspection result normal?
YES >> Hot inlet hose and a warm outlet hose: GO TO 8.
NO >>  Inlet hose cold: GO TO 11.
 Both hoses warm: GO TO 9.

LAN-18
< FUNCTION DIAGNOSIS >[CAN FUNDAMENTAL]
TROUBLE DIAGNOSIS
Example: Main Line Between Data Link Connector and ABS Actuator and Electric Unit (Control Unit) Open Circuit
Example: CAN-H, CAN-L Harness Short Circuit
SKIB8740E
Unit name Symptom
ECM Engine torque limiting is affected, and shift harshness increases.
BCM Reverse warning chime does not sound.
 The front wiper moves under continuous operation mode even though the front wip-
er switch being in the intermittent position.
EPS control unit The steering effort increases.
Combination meter The shift position indicator and OD OFF indicator turn OFF.
 The speedometer is inoperative.
 The odo/trip meter stops.
ABS actuator and electric unit (control unit) Normal operation.
TCM No impact on operation.
IPDM E/RWhen the ignition switch is ON,
 The headlamps (Lo) turn ON.
 The cooling fan continues to rotate.
SKIB8741E

LAN
TROUBLE DIAGNOSIS
LAN-19
< FUNCTION DIAGNOSIS >[CAN FUNDAMENTAL]
C
D
E
F
G
H
I
J
K
L B A
O
P N
CAN Diagnosis with CONSULT-IIIINFOID:0000000001162760
CAN diagnosis on CONSULT-III extracts the root cause by receiving the following information.
 Response to the system call
 Control unit diagnosis information
 Self-diagnosis
 CAN diagnostic support monitor
Self-DiagnosisINFOID:0000000001162761
CAN Diagnostic Support MonitorINFOID:0000000001162762
MONITOR ITEM (CONSULT-III)
Unit name Symptom
ECM Engine torque limiting is affected, and shift harshness increases.
 Engine speed drops.
BCM Reverse warning chime does not sound.
 The front wiper moves under continuous operation mode even though the front
wiper switch being in the intermittent position.
 The room lamp does not turn ON.
 The engine does not start (if an error or malfunction occurs while turning the igni-
tion switch OFF.)
 The steering lock does not release (if an error or malfunction occurs while turning
the ignition switch OFF.)
EPS control unit The steering effort increases.
Combination meter The tachometer and the speedometer do not move.
 Warning lamps turn ON.
 Indicator lamps do not turn ON.
ABS actuator and electric unit (control unit) Normal operation.
TCM No impact on operation.
IPDM E/RWhen the ignition switch is ON,
 The headlamps (Lo) turn ON.
 The cooling fan continues to rotate.
DTCSelf-diagnosis item
(CONSULT-III indication)DTC detection condition Inspection/Action
U1000 CAN COMM CIRCUITWhen ECM is not transmitting or receiving CAN
communication signal of OBD (emission-related
diagnosis) for 2 seconds or more.
Start the inspection. Re-
fer to the applicable sec-
tion of the indicated
control unit. When a control unit (except for ECM) is not
transmitting or receiving CAN communication
signal for 2 seconds or more.
U1001 CAN COMM CIRCUITWhen ECM is not transmitting or receiving CAN
communication signal other than OBD (emis-
sion-related diagnosis) for 2 seconds or more.
U1002 SYSTEM COMMWhen a control unit is not transmitting or receiv-
ing CAN communication signal for 2 seconds or
less.
U1010 CONTROL UNIT [CAN]When an error is detected during the initial diag-
nosis for CAN controller of each control unit.Replace the control unit
indicating “U1010”.

LAN
CAN COMMUNICATION SYSTEM
LAN-33
< FUNCTION DIAGNOSIS >[CAN]
C
D
E
F
G
H
I
J
K
L B A
O
P N
Check CAN system type from the vehicle shape and equipment.
CAN Communication Signal ChartINFOID:0000000001162801
Refer to LAN-21, "How to Use CAN Communication Signal Chart" for how to use CAN communication signal
chart.
NOTE:
Refer to LAN-27, "
Abbreviation List" for the abbreviations of the connecting units.
T: Transmit R: Receive
ALMIA0068GB
Signal name/Connecting unitECM
BCM
EPS
I-KEY
M&A
STRG
AV
ABS
TCM
IPDM-E
A/C compressor request signal TR
Accelerator pedal position signal T
R
*1R
ASCD CRUISE lamp signal T R
ASCD status signal T R
Closed throttle position signal T R
Cooling fan speed request signal TR
Engine coolant temperature signal T R R
Engine speed signal T R R R
R
*1R
Engine status signal T R R R
Fuel consumption monitor signal T R R
Glow indicator signal
*2TR
Malfunctioning indicator lamp signal (×2
*2)TR
Wide open throttle signal T R
A/C switch signal R T
Blower fan motor switch signal
*3RT