2001 NISSAN ALMERA heater

11 CHECK CIRCUIT CONTINUITY BETWEEN DUAL-PRESSURE SWITCH AND HEATER CONTROL PANEL
(A/C SWITCH)
Check circuit continuity between dual-pressure switch harness terminal No. 1 and heater control panel harness terminal
No. 7.
NHA490
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©GO TO 12.
NG©Repair harness or connector.
12 CHECK A/C SWITCH
Refer to HA-67.
OK or NG
OK©GO TO 13.
NG©Replace A/C switch.
13 CHECK HEATER CONTROL PANEL CIRCUIT
Check circuit continuity between heater control panel harness terminal No. 8 and No. 18.
NHA491
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©GO TO 14.
NG©Repair harness or connector.
TROUBLE DIAGNOSES
Magnet Clutch (Cont'd)
HA-65

14 CHECK FAN SWITCH
Refer to HA-54.
OK or NG
OK©GO TO 15.
NG©Replace fan switch.
15 CHECK BODY GROUND CIRCUIT
Check circuit continuity between heater control panel harness terminal No. 13 and body ground.
RHA778H
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©INSPECTION END.
NG©Repair harness or connector.
RHA638H
ELECTRICAL COMPONENT INSPECTIONNJHA0192A/C RelayNJHA0192S01Check continuity between terminal Nos. 3 and 5.
Conditions Continuity
12V direct current supply between terminal Nos. 1 and 2 Yes
No current supply No
If NG, replace relay.
TROUBLE DIAGNOSES
Magnet Clutch (Cont'd)
HA-66

Heater & Cooling Unit (Heater Core)
REMOVALNJHA0193
RHA807H
1. Drain the cooling system. Refer to LC-18 (QG), LC-44 (YD),
ªChanging Engine Coolantº.
2. Discharge the A/C system. Refer to HA-78.
3. Disconnect the two heater hoses from inside the engine com-
partment.
4. Remove the blower unit. Refer to HA-89.
5. Remove the steering member assembly. Refer to BT-25,
ªInstrument Panel Assemblyº.
6. Remove the heater unit.
7. Separate the heater & cooling unit case, and remove the
heater core.
INSTALLATIONNJHA0194Install in the reverse order of removal.
When filling radiator with coolant, refer to LC-19 (QG), LC-45
(YD), ªRefilling Engine Coolantº.
Recharge the A/C system. Refer to HA-78.
RHA673H
A/C Evaporator
REMOVALNJHA02041. Discharge the A/C system. Refer to HA-78.
2. Disconnect the two refrigerant lines from the engine compart-
ment.
Cap the A/C lines to prevent moisture from entering the sys-
tem.
3. Remove the grommet cover, grommet and expansion valve
cover from the engine compartment.
4. Remove the glove box, instrument lower assist panel, instru-
ment lower cover and drink holder. Refer to BT-25.
SERVICE PROCEDURE
Heater & Cooling Unit (Heater Core)
HA-88

RHA674H
5. Remove the five screws fixed heater & cooling unit lower
cover.
6. Slide the A/C evaporator to rear side.
7. Slide the heater & cooling unit lower cover to rear side and
then remove it.
8. Slide the A/C evaporator to the front side and then remove the
A/C evaporator.
INSTALLATIONNJHA0205Install in the reverse order of removal.
Recharge the A/C system. Refer to HA-78.
Blower Unit
REMOVALNJHA0195
RHA676HA
SERVICE PROCEDURE
A/C Evaporator (Cont'd)
HA-89

5. If a leak detector detects a leak, verify at least once by blow-
ing 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 steps7-10.
7. Start engine.
8. Set the heater A/C control as follows:
1) A/C switch ON.
2) Face mode
3) Recirculation position
4) Max cold temperature
5) 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.
SHA839E
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 pres-
sure on the low pressure side will gradually rise, as shown
in the graph. Some leaks are more easily detected when
pressure is high.
11. Discharge A/C system using approved refrigerant recovery
equipment. Repair the leaking fitting or component as neces-
sary.
12. Evacuate and recharge A/C system and perform the leak test
to confirm no refrigerant leaks.
13. Conduct A/C performance test to ensure system works
properly.
Belt
TENSION ADJUSTMENTNJHA0169+Refer to EM-16 (QG), EM-85 (YD), ªChecking Drive Beltº.
SERVICE PROCEDURE
Refrigerant Lines (Cont'd)
HA-95

Electronic fuel injection pump ........ EC-618, 716,
723, 757, 764, 771, 778, 785, 803
Engine compartment ................................. BT-78
Engine control circuit diagram .......... EC-25, 606
Engine control component parts
location .......................................... EC-21, 603
Engine control module (ECM) ....... EC-391, 659,
714, 792, 794, 799, 801
Engine control system diagram and
chart .............................................. EC-29, 608
Engine coolant temperature sensor
(ECTS) ........................................ EC-201, 680
Engine fail-safe system ........................... EC-154
Engine oil precautions .................................. GI-7
Engine outer component parts ................. EM-11
Engine removal ................................ EM-51, 137
Engine room - See Engine
compartment .......................................... BT-78
Engine serial number ................................. GI-41
Evaporative emission (EVAP)
system ................................................... EC-36
Exhaust gas recirculation (EGR)
valve .................................... EC-343, 425, 491
Exhaust system ................................... FE-15, 32
Exterior ...................................................... BT-47
F
F/PUMP - Wiring diagram ....................... EC-563
FR02 - Wiring diagram ... EC-219, 239, 247, 451
FR02/H - Wiring diagram ................ EC-254, 458
FUEL - Wiring diagram ................... EC-299, 307
Fan switch ................................................. HA-54
Final drive (FF A/T) .................................. AT-442
Final drive (FF M/T) .............. MT-44, 77, 93, 107
Finisher, interior - See Trim ....................... BT-31
Finisher, trunk lid ....................................... BT-45
Floor trim ................................................... BT-31
Fluid temperature sensor (A/T) ................ AT-194
Fluids ........................................................ MA-16
Flywheel (clutch) ....................................... CL-22
Flywheel runout ................................ EM-62, 154
Fog lamp, front, removal and
installation ................................................ BT-7
Fog lamp, front .......................................... EL-89
Fork rod (M/T) .............................. MT-32, 56, 94
Forward clutch ......................................... AT-412
Freeze frame data .............................. EC-61, 72
Front axle .................................................... AX-2
Front bumper ............................................... BT-7
Front combination lamp removal and
installation ................................................ BT-7
Front disc brake ........................................ BR-27
Front door .................................................. BT-16
Front fog lamp removal and
installation ................................................ BT-7
Front fog lamp ........................................... EL-89
Front heated oxygen sensor (HO2S)
heater .......................................... EC-252, 457Front heated oxygen sensor (HO2S) ..... EC-216,
224, 230, 236, 245, 450
Front seat belt ............................................. RS-5
Front seat .................................................. BT-56
Front suspension ........................................ SU-2
Front washer ............................................ EL-215
Front wiper ............................................... EL-215
Fuel cut control (at no load & high
engine speed) ............................... EC-36, 612
Fuel gauge ............................................... EL-144
Fuel injection system .............. EC-297, 305, 610
Fuel injector ............................................ EC-541
Fuel precautions ........................................... GI-8
Fuel pressure check ................................. EC-40
Fuel pressure regulator ............................. EC-41
Fuel pressure release ............................... EC-40
Fuel pump relay ...................................... EC-561
Fuel pump ............................................... EC-561
Fuel system ........................................... FE-5, 20
Fuel tank vacuum relief valve ................... EC-37
Fuse block ............................................... EL-577
Fuse ........................................................... EL-38
Fusible link ................................................. EL-38
G
GLOW - Wiring diagram ......................... EC-806
Garage jack and safety stand .................... GI-45
Gauges .................................................... EL-144
Gear components (M/T) ............... MT-31, 55, 93
Generator - See Alternator ....................... SC-31
Generic scan tool (GST) ........................... EC-94
Glass .......................................................... BT-17
Glow plug ................................................ EC-806
Glow relay ............................................... EC-806
Grease ...................................................... MA-16
Ground distribution .................................... EL-39
H
H/LAMP - Wiring diagram ................... EL-60, 61
HEATER - Wiring diagram ........................ HA-24
HFC134a (R134a) system
precaution ................................................ HA-2
HFC134a (R134a) system service
procedure .............................................. HA-78
HFC134a (R134a) system service
tools ....................................................... HA-11
HFC134a system service equipment
precaution ................................................ HA-6
HORN - Wiring diagram .................. EL-234, 235
HSEAT - Wiring diagram ................. EL-288, 290
Harness connector ...................................... EL-6
Harness layout ......................................... EL-522
Hazard warning lamp ................................ EL-96
Headlamp removal and installation ............. BT-7
Headlamp washer .................................... EL-231
Headlamp .................................................. EL-60
ALPHABETICAL INDEX
IDX-4

Headlining - See Roof trim ........................ BT-43
Heated oxygen sensor (HO2S)
(front) .......... EC-216, 224, 230, 236, 245, 450
Heated oxygen sensor (HO2S) heater
(front) ........................................... EC-252, 457
Heated oxygen sensor (HO2S) heater
(rear) ............................................ EC-291, 469
Heated oxygen sensor (rear) ......... EC-258, 267,
275, 284, 462
Heated seat ............................................. EL-288
Height (Dimensions) ................................... GI-43
High clutch ............................................... AT-407
Hood ............................................................ BT-7
Horn ......................................................... EL-234
How to erase DTC for OBD system .. EC-70, 73,
627
I
IACV-AAC valve .............................. EC-376, 511
IATS - Wiring diagram .................... EC-196, 444
IGN/SG - Wiring diagram ........................ EC-548
ILL - Wiring diagram ................................ EL-112
INJECT - Wiring diagram ........................ EC-542
INT/L - Wiring diagram .................... EL-141, 143
IVC - Wiring diagram ...................... EC-395, 527
Identification plate ...................................... GI-40
Idle air control (IAC) system ........... EC-376, 511
Idle air control valve (IACV) ............ EC-376, 511
Idle speed ......................................... EC-43, 641
Ignition timing ............................................ EC-43
Illumination ............................................... EL-108
Injection nozzle ....................................... EC-614
Injector removal and installation ............... EC-41
Input shaft (FF M/T) ............... MT-36, 64, 93, 98
Instrument panel ........................................ BT-25
Intake air temperature sensor ......... EC-194, 442
Intake valve timing control solenoid
valve ............................................ EC-393, 526
Interior lamp on-off control .............. EL-116, 128
Interior lamp ............................................. EL-115
Interior ........................................................ BT-31
J
Jacking points ............................................ GI-45
Joint connector (J/C) ............................... EL-583
Junction box (J/B) .................................... EL-577
K
Keyless entry system - See Multi-remote control
system ..................................................... EL-392
Knock sensor (KS) .......................... EC-324, 325
Knuckle spindle ........................................... AX-5
L
LOAD - Wiring diagram .......................... EC-579
Length (Dimensions) .................................. GI-43
License lamp ............................................. EL-81
Lifting points ............................................... GI-46
Line pressure solenoid valve ................... AT-232
Line pressure test (A/T) ............................. AT-84
Liquid gasket application ...................... EM-4, 77
Location of electrical units ....................... EL-517
Lock, door .................................................. BT-21
Low and reverse brake ............................ AT-419
Lubricant (R134a) A/C .............................. HA-80
Lubricants ................................................. MA-16
Lubrication circuit (engine) .................... LC-4, 27
M
M/T major overhaul ....................... MT-30, 54, 92
M/T removal and installation ..................... MT-23
MAFS - Wiring diagram .................. EC-189, 673
MAIN - Wiring diagram ................... EC-178, 666
MAJOR OVERHALL ................................ AT-357
METER - Wiring diagram ........................ EL-151
MIL & Data link connectors circuit .......... EC-591
MIL/DL - Wiring diagram ................. EC-591, 831
MIRROR - Wiring diagram .............. EL-294, 295
Magnet clutch ............................................ HA-83
Mainshaft (M/T) .................... MT-39, 69, 93, 103
Malfunction indicator lamp (MIL) ...... EC-74, 628
Manual air conditioner - Wiring
diagram .................................................. HA-27
Manual transaxle number .......................... GI-42
Mass air flow sensor (MAFS) ......... EC-187, 673
Master cylinder (brake) ............................. BR-14
Master cylinder (clutch) ............................. CL-11
Meter ........................................................ EL-144
Mirror defogger ........................................ EL-240
Mirror, door ................................................ BT-75
Misfire ...................................................... EC-318
Mode door control linkage
adjustment ............................................. HA-41
Model variation ........................................... GI-38
Molding - See Exterior ............................... BT-47
Multi-remote control system .................... EL-392
Multiport fuel injection (MFI) system ......... EC-32
Multiport fuel injection precautions ............... GI-6
N
NATS (Nissan Anti-theft System)
precautions ................................................... GI-3
NATS (Nissan Anti-theft System) ............ EL-422
NATS - Wiring diagram ................... EL-425, 427
NVH troubleshooting (AX) ........................... AX-3
NVH troubleshooting (BR) .......................... BR-7
NVH troubleshooting (MT) ........................ MT-13
NVH troubleshooting (ST) ........................... ST-5
ALPHABETICAL INDEX
IDX-5

NVH troubleshooting (SU) ........................ SU-16
NVH troubleshooting (CL) ........................... CL-4
NVIS (Nissan vehicle immobiliser sys-
tem) precautions ....................................... GI-3
Neutral position switch .................... EC-437, 536
O
Oil pan (engine) .................................. EM-20, 89
Oil pressure (engine) ............................ LC-5, 28
Oil pump (A/T) ......................................... AT-384
Oil pump (engine) ................................. LC-5, 28
Oil pump regulator valve (engine) ......... LC-8, 30
Oil seal replacement (engine) .................. EM-32
On board diagnostic system ............. EC-59, 627
Operating cylinder (clutch) ........................ CL-14
Overdrive control switch .......................... AT-341
Overrun clutch .......................................... AT-412
P
P/ANT - Wiring diagram .......................... EL-282
PCV (positive crankcase
ventilation) ..................................... EC-39, 613
PGC/V - Wiring diagram ................. EC-366, 505
PNP/SW - Wiring diagram ...... EC-439, 537, 826
POWER - Wiring diagram ................... EL-11, 28
PST/SW - Wiring diagram ....................... EC-568
Park/Neutral position switch ... EC-437, 536, 826
Park/neutral position switch (A/T) ............ AT-183
Park/neutral position switch (M/T) ............ MT-21
Parking brake control ................................ BR-47
Parking lamp .............................................. EL-81
Piston assembly ............................... EM-62, 155
Piston pin inspection ........................ EM-56, 145
Piston ring inspection ....................... EM-56, 145
Piston to bore clearance .................. EM-58, 147
Power antenna ........................................ EL-282
Power door lock ....................................... EL-314
Power door mirror .................................... EL-294
Power steering fluid level ............................ ST-7
Power steering gear .................................. ST-16
Power steering hydraulic pressure .............. ST-9
Power steering oil pressure switch ......... EC-567
Power steering oil pump ............................ ST-25
Power steering system bleeding ................. ST-8
Power supply routing ................................. EL-10
Power window ......................................... EL-298
Precautions (General) .................................. GI-4
Pressure plate - See Clutch cover ............ CL-22
Priming pump .................................. EC-625, 641
Q
Quick-glow system .................................. EC-806
R
RR02 - Wiring diagram .......... EC-261, 270, 278,
286, 463
RR02/H - Wiring diagram ............... EC-293, 470
Radiator ............................................... LC-16, 42
Radio - See Audio ................................... EL-258
Rear air spoiler .......................................... BT-47
Rear axle (disc brake type) ....................... AX-24
Rear axle ................................................... AX-22
Rear bumper .............................................. BT-10
Rear combination lamp removal and
installation .............................................. BT-47
Rear disc brake .................................. BR-35, 43
Rear door ................................................... BT-16
Rear drum brake ....................................... BR-31
Rear heated oxygen sensor (HO2S)
heater .......................................... EC-291, 469
Rear heated oxygen sensor (HO2S) ..... EC-258,
267, 275, 284, 462
Rear seat belt ............................................ RS-11
Rear seat ................................................... BT-60
Rear suspension ....................................... SU-16
Rear window defogger ............................ EL-240
Rear window .............................................. BT-71
Refrigerant connection precaution .............. HA-3
Refrigerant general precaution ................... HA-2
Refrigerant lines ........................................ HA-91
Refrigeration cycle .................................... HA-13
Release bearing (clutch) ..................... CL-17, 20
Removal and installation (A/T) ................ AT-354
Reverse clutch ......................................... AT-403
Reverse idler shaft (M/T) .............. MT-30, 54, 93
Reverse lamp switch (M/T) - See
Back-up lamp switch (M/T) ................... MT-21
Reverse main gear (M/T) ............. MT-31, 55, 93
Road wheel size ......................................... GI-43
Roof trim .................................................... BT-43
Room lamp - See Interior lamp ............... EL-115
S
S/LOCK - Wiring diagram ............... EL-318, 335,
352, 372
S/SIG - Wiring diagram ........................... EC-558
SAE J1930 terminology list ........................ GI-50
SHIFT - Wiring diagram ........................... AT-344
SROOF - Wiring diagram ........................ EL-292
SRS - See Supplemental Restraint
System ................................................... RS-20
START - Wiring diagram ........................... SC-14
STOP/L - Wiring diagram .................... EL-85, 86
SWL/V - Wiring diagram ................. EC-399, 475
Seal - See Exterior .................................... BT-47
Seat belt pre-tensioner disposal ............... RS-40
Seat belt pre-tensioner ............................... RS-3
Seat belt, front ............................................ RS-5
Seat belt, rear ............................................ RS-11
Seat, front .................................................. BT-56
ALPHABETICAL INDEX
IDX-6