relay NISSAN ALMERA 2001 Service Manual

Refrigeration System
REFRIGERATION CYCLENJHA0121Refrigerant FlowNJHA0121S01The refrigerant flows in the standard pattern, that is, through the compressor, the condenser, the liquid tank,
through the evaporator, and back to the compressor. The refrigerant evaporation through the evaporator coil
is controlled by an externally equalized expansion valve, located inside the heater & cooling unit.
Freeze ProtectionNJHA0121S02The compressor cycles go on and off to maintain the evaporator temperature within a specified range. When
the evaporator coil temperature falls below a specified point, the thermo control amplifier interrupts the com-
pressor operation. When the evaporator coil temperature rises above the specification, the thermo control
amplifier allows compressor operation.
Refrigerant System ProtectionNJHA0121S03Refrigerant Pressure SensorNJHA0121S0303The refrigerant system is protected against excessively high or low pressures by the refrigerant pressure
sensor, located on the liquid tank. If the system pressure rises above, or falls below the specifications, the
refrigerant pressure sensor detects the pressure inside the refrigerant line and sends the voltage signal to the
ECM. ECM makes the A/C relay go OFF and stops the compressor when pressure on the high pressure side
detected by refrigerant pressure sensor is over about 2,746 kPa (27.5 bar, 28 kg/cm
2, 398 psi) or below about
137 kPa (1.37 bar, 1.4 kg/cm2, 20 psi).
Dual-pressure Switch
NJHA0121S0304The refrigerant system is protected against excessively high or low pressures by the dual-pressure switch,
located on the liquid tank. If the pressure falls out of specifications, the switch opens to interrupt compressor
operation.
Pressure Relief Valve
NJHA0121S0302The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compres-
sor. When the pressure of refrigerant in the system increases to an abnormal level [more than 3,727 kPa (37.3
bar, 38 kg/cm
2, 540 psi)], the release port on the pressure relief valve automatically opens and releases
refrigerant into the atmosphere.
RHA682H
DESCRIPTION
Refrigeration System
HA-13

MAGNET CLUTCH CIRCUIT (FOR QG ENGINE)=NJHA0156SYMPTOM:
+Magnet clutch does not engage when A/C switch and fan
switch are ON.
1 CHECK POWER SUPPLY FOR COMPRESSOR
Disconnect compressor harness connector.
Do approx. 12 volts exist between compressor harness terminal No. 1 and body ground?
RHA794H
YesorNo
Ye s©GO TO 2.
No©Disconnect A/C relay. GO TO 3.
2 CHECK MAGNET CLUTCH COIL
OK or NG
NG©Replace magnet clutch. Refer to HA-85.
3 CHECK CIRCUIT CONTINUITY BETWEEN A/C RELAY AND COMPRESSOR HARNESS
Check circuit continuity between A/C relay harness terminal No. 3 and compressor harness terminal No. 1.
RHA634H
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©GO TO 4.
NG©Repair harness or connector.
TROUBLE DIAGNOSES
Magnet Clutch (Cont'd)
HA-56

4 CHECK POWER SUPPLY FOR A/C RELAY
Disconnect A/C relay.
Do approx. 12 volts exist between A/C relay harness terminal Nos. 1, 5 and body ground?
RHA635H
YesorNo
Ye s©GO TO 5.
No©Check power supply circuit and 10A (No. 15) fuse at fuse block. Refer to Sedan: EL-11,
Hatchback: EL-28, ªWiring Diagram Ð POWER к.
5 CHECK A/C RELAY AFTER DISCONNECTING IT
Refer to HA-66.
OK or NG
OK©Reconnect A/C relay. GO TO 6.
NG©Replace A/C relay.
6 CHECK COIL SIDE CIRCUIT OF A/C RELAY
Do approx. 12 volts exist between ECM harness terminal No. 16 or 23 and body ground?
RHA764H
YesorNo
Ye s©GO TO 8.
No©Disconnect A/C relay. Disconnect ECM harness connector. GO TO 7.
TROUBLE DIAGNOSES
Magnet Clutch (Cont'd)
HA-57

7 CHECK CIRCUIT CONTINUITY BETWEEN A/C RELAY AND ECM HARNESS
Check circuit continuity between A/C relay harness terminal No. 2 and ECM harness terminal No. 16 or 23.
RHA765H
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©Check ECM. Refer to EC-164 (QG), ªECM Terminals and Reference Valueº.
NG©Repair harness or connector.
8 CHECK VOLTAGE FOR ECM
Do approx. 12 volts exist between ECM harness terminal No. 68 or 51 and body ground?
RHA766H
YesorNo
Ye s©GO TO 9.
No©Check ECM. Refer to EC-164 (QG), EC-659 (YD), ªECM Terminals and Reference
Valueº.
9 CHECK REFRIGERANT PRESSURE SENSOR
Refer to HA-67.
OK or NG
OK©GO TO 10.
NG©Replace refrigerant pressure sensor.
10 CHECK A/C SWITCH
Refer to HA-67.
OK or NG
OK©GO TO 11.
NG©Replace heater control panel.
TROUBLE DIAGNOSES
Magnet Clutch (Cont'd)
HA-58

16 CHECK BODY GROUND CIRCUIT
Check circuit continuity between heater control panel harness terminal No. 9 or 13 and body ground.
RHA771H
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©INSPECTION END
NG©Repair harness or connector.
MAGNET CLUTCH CIRCUIT (FOR YD ENGINE)NJHA0203SYMPTOM:
+Magnet clutch does not engage when A/C switch and fan
switch are ON.
1 CHECK POWER SUPPLY FOR COMPRESSOR
Disconnect compressor harness connector.
Do approx. 12 volts exist between compressor harness terminal No. 1 and body ground?
RHA794H
YesorNo
Ye s©GO TO 2.
No©Disconnect A/C relay. GO TO 3.
2 CHECK MAGNET CLUTCH COIL
OK or NG
NG©Replace magnet clutch. Refer to HA-85.
TROUBLE DIAGNOSES
Magnet Clutch (Cont'd)
HA-61

3 CHECK CIRCUIT CONTINUITY BETWEEN A/C RELAY AND COMPRESSOR HARNESS
Check circuit continuity between A/C relay harness terminal No. 3 and compressor harness terminal No. 1.
RHA634H
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©GO TO 4.
NG©Repair harness or connector.
4 CHECK POWER SUPPLY FOR A/C RELAY
Disconnect A/C relay.
Do approx. 12 volts exist between A/C relay harness terminal Nos. 1, 5 and body ground?
RHA635H
YesorNo
Ye s©GO TO 5.
No©Check power supply circuit and 10A (No. 15) fuse at fuse block. Refer to Sedan: EL-11,
Hatchback: EL-28, ªWiring Diagram Ð POWER к.
5 CHECK A/C RELAY AFTER DISCONNECTING IT
Refer to HA-66.
OK or NG
OK©Reconnect A/C relay. GO TO 6.
NG©Replace A/C relay.
TROUBLE DIAGNOSES
Magnet Clutch (Cont'd)
HA-62

6 CHECK COIL SIDE CIRCUIT OF A/C RELAY
Do approx. 12 volts exist between ECM harness terminal No. 15 or 204 and body ground?
RHA772H
YesorNo
Ye s©GO TO 8.
No©Disconnect A/C relay. Disconnect ECM harness connector. GO TO 7.
7 CHECK CIRCUIT CONTINUITY BETWEEN A/C RELAY AND ECM HARNESS
Check circuit continuity between A/C relay harness terminal No. 2 and ECM harness terminal No. 15 or 204.
RHA773H
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©Check ECM. Refer to EC-164 (QG), EC-659 (YD), ªECM Terminals and Reference
Valueº.
NG©Repair harness or connector.
TROUBLE DIAGNOSES
Magnet Clutch (Cont'd)
HA-63

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

A
A/C HFC134a (R134a) system precaution . HA-2
A/C HFC134a (R134a) system service
procedure .............................................. HA-78
A/C HFC134a (R134a) system service
tools ....................................................... HA-11
A/C HFC134a system service equip-
ment precaution ....................................... HA-6
A/C air flow ............................................... HA-20
A/C component layout .............................. HA-18
A/C compressor clutch removal and
installation .............................................. HA-83
A/C compressor precaution ........................ HA-5
A/C compressor special service tool .......... HA-9
A/C control linkage adjustment
(manual A/C) ......................................... HA-41
A/C control operation (manual A/C) .......... HA-19
A/C diagnostic work flow
(manual A/C) ........................................ HA-33
A/C harness layout (manual A/C) ............. HA-22
A/C lubricant (R134a) ............................... HA-80
A/C operational check ............................... HA-34
A/C performance chart .............................. HA-71
A/C performance test diagnoses .............. HA-69
A/C relay ................................................... HA-66
A/C service data specification .................. HA-97
A/C switch ................................................. HA-67
A/C, M - Wiring diagram ........................... HA-27
A/CCUT - Wiring diagram ....................... EC-830
A/T - Wiring diagram - AT - 1ST .............. AT-207
A/T - Wiring diagram - AT - 2ND ............. AT-214
A/T - Wiring diagram - AT - 3RD ............. AT-220
A/T - Wiring diagram - AT - 4TH .............. AT-227
A/T - Wiring diagram - AT - BA/FTS ....... AT-167,
276
A/T - Wiring diagram - AT - ENG SS ...... AT-173,
201
A/T - Wiring diagram - AT - FTS .............. AT-191
A/T - Wiring diagram - AT - LPSV ... AT-178, 241
A/T - Wiring diagram - AT - MAIN ........... AT-123
A/T - Wiring diagram - AT -
NONDTC .............................................. AT-292
A/T - Wiring diagram - AT -
OVRCSV ...................................... AT-155, 270
A/T - Wiring diagram - AT - PNP/SW ...... AT-185
A/T - Wiring diagram - AT - SSV/A .. AT-144, 248
A/T - Wiring diagram - AT - SSV/B .. AT-150, 254
A/T - Wiring diagram - AT - TCV ..... AT-161, 235
A/T - Wiring diagram - AT - TPS ..... AT-136, 261
A/T - Wiring diagram - AT - VSS/AT ....... AT-128,
197
A/T - Wiring diagram - AT -
VSSMTR ...................................... AT-132, 283
A/T IND - Wiring diagram ........................ EL-195
A/T control ............................................... EC-532
A/T diagnosis communication line .......... EC-434
A/T fluid temperature sensor ................... AT-194A/T shift lock system - Wiring
diagram ................................................ AT-344
A/T shift lock system ................................ AT-343
A/T trouble diagnoses .......................... AT-69, 74
AAC/V - Wiring diagram ................. EC-378, 513
ABS (anti-lock brake system) ................... BR-49
ABS - Wiring diagram ............................... BR-54
ABS sensor rotor ....................................... AX-24
APS - Wiring diagram ............................. EC-685
ATDIAG - Wiring diagram ............... EC-435, 533
Accelerator control system .................... FE-3, 19
Accelerator position sensor .................... EC-685
Air bag disposal ........................................ RS-40
Air bag precautions ...................................... GI-3
Air bag ....................................................... RS-20
Air bleeding (hydraulic clutch) ................... CL-10
Air bleeding for brake system ..................... BR-9
Air conditioner cut control ................. EC-35, 612
Air flow meter - See Mass air flow
sensor .......................................... EC-187, 673
Air mix door control linkage
adjustment ............................................. HA-43
Air spoiler, rear .......................................... BT-47
Alternator ................................................... SC-31
Angular tightening application .............. EM-4, 77
Antenna - See Power antenna ................ EL-282
Anti-lock brake system - Wiring
diagram .................................................. BR-54
Audio and A/C control removal and
installation - See Instrument panel ........ BT-25
Audio ........................................................ EL-258
Automatic transaxle number ...................... GI-41
Auxiliary air control (AAC) valve ..... EC-376, 511
B
Back-up lamp switch (M/T) ....................... MT-21
Back-up lamp ............................................. EL-87
Ball joint (front) .......................................... SU-13
Basic inspection ...................... EC-100, 128, 641
Battery ......................................................... SC-3
Baulk ring (M/T) ............................ MT-31, 55, 93
Blower motor ............................................. HA-54
Blower resistor .......................................... HA-54
Board-on lift ................................................ GI-44
Body alignment .......................................... BT-77
Brake booster ............................................ BR-20
Brake fluid change ...................................... BR-8
Brake fluid level and line check .................. BR-8
Brake hydraulic line .................................. BR-10
Brake master cylinder ............................... BR-14
Brake pedal ............................................... BR-12
Bulb specifications ................................... EL-574
Bumper, front .............................................. BT-7
Bumper, rear .............................................. BT-10
ALPHABETICAL INDEX
IDX-2

C
CHARGE - Wiring diagram ....................... SC-27
CHIME - Wiring diagram ................. EL-199, 207
CIGAR - Wiring diagram ................. EL-236, 237
CKPS - Wiring diagram .......... EC-330, 485, 695
CMPS - Wiring diagram .......................... EC-337
CONSULT for ABS .................................... BR-65
CONSULT for engine ........................ EC-83, 632
COOL/F - Wiring diagram ............... EC-409, 730
Camshaft inspection ......................... EM-37, 123
Camshaft position sensor (CMPS) ......... EC-335
Camshaft position sensor (PHASE) ........ EC-335
Canister - See EVAP canister ................... EC-36
Charging system ....................................... SC-26
Cigarette lighter ....................................... EL-236
Circuit breaker ........................................... EL-38
Closed throttle position switch ....... EC-385, 520
Clutch cover .............................................. CL-22
Clutch disc ................................................. CL-22
Clutch master cylinder ............................... CL-11
Clutch operating cylinder ........................... CL-14
Clutch pedal .............................................. CL-10
Clutch release bearing ........................ CL-17, 20
Clutch release mechanism .................. CL-17, 20
Clutch withdrawal lever ....................... CL-17, 20
Coil spring (front) ........................................ SU-9
Coil spring (rear) ....................................... SU-21
Collision diagnosis .................................... RS-85
Combination lamp, rear, removal and
installation .............................................. BT-47
Combination meter removal and instal-
lation - See Instrument panel ................ BT-25
Combination meter .................................. EL-144
Combination switch ................................... EL-56
Compression pressure ............................. EM-83
Compressor clutch removal and
installation .............................................. HA-83
Compressor precaution ............................... HA-5
Compressor special service tool ................. HA-9
Connecting rod bearing clearance ... EM-60, 151
Connecting rod bushing clearance ... EM-61, 153
Connecting rod ................................. EM-57, 146
Console box - See Instrument panel ......... BT-25
Control lever (M/T) .................................... MT-29
Control valve (A/T) ................................... AT-388
Converter housing installation ................. AT-355
Coolant mixture ratio ................................ MA-18
Cooling circuit (engine) ....................... LC-12, 37
Cooling fan control system .................. LC-17, 43
Cooling fan control .......................... EC-406, 730
Cooling fan motor ................................... EC-417
Cooling fan relay ..................................... EC-416
Coupling sleeve (M/T) .................. MT-31, 55, 93
Crankcase emission control system -
See Positive crankcase ventilation ...... EC-39,
613
Crankcase ventilation system - See
Positive crankcase ventilation ....... EC-39, 613
Crankshaft position sensor (OBD) .. EC-328, 484Crankshaft position sensor (POS) .. EC-328, 484
Crankshaft position sensor (TDC) .......... EC-695
Crankshaft ........................................ EM-59, 148
Cylinder block ................................... EM-54, 140
Cylinder head .................................... EM-34, 119
D
DEF - Wiring diagram ...................... EL-242, 250
DTC work support ..................................... EC-92
Data link connector for Consult ........ EC-40, 632
Daytime light system ................................. EL-67
Detonation sensor - See Knock
sensor .................................................. EC-324
Diagnosis sensor unit ............................... RS-26
Diagnostic trouble code (DTC) for
OBD system .................... EC-10, 72, 596, 627
Diagnostic trouble code (DTC) inspec-
tion priority chart .................................. EC-153
Differential gear (FF A/T) ......................... AT-442
Differential gear (FF M/T) ...... MT-31, 44, 55, 93,
107
Dimensions ................................................. GI-43
Dome light - See Interior lamp ................ EL-115
Door glass ................................................. BT-17
Door lock ................................................... BT-21
Door mirror ................................................ BT-75
Door trim .................................................... BT-39
Door, front .................................................. BT-16
Door, rear ................................................... BT-16
Drive plate runout ..................................... EM-62
Drive shaft (front) ...................................... AX-10
Dropping resistor (A/T) .................... AT-182, 245
Dual pressure switch ................................ HA-13
E
ECCS-D control module ........ EC-659, 714, 792,
794, 799, 801
ECM input/output signal ................. EC-164, 659
ECTS - Wiring diagram ................... EC-203, 680
EGR control valve ................................... EC-432
EGR temperature sensor ........................ EC-418
EGR volume control valve ...................... EC-815
EGR/TS - Wiring diagram ....................... EC-421
EGRC1 - Wiring diagram ....... EC-347, 429, 494,
817
EVAP canister purge volume control
solenoid valve ........................................ EC-37
EVAP canister purge volume control
valve ............................................ EC-364, 503
EVAP canister ........................................... EC-37
Electric sunroof ........................................ EL-292
Electrical diagnoses ................................... GI-21
Electrical ignition system .......................... EC-34
Electrical load signal circuit ..................... EC-578
Electrical unit ........................................... EL-581
Electrical units location ............................ EL-517
ALPHABETICAL INDEX
IDX-3