2003 NISSAN ALMERA N16 clutch

Magnet Clutch
TROUBLE DIAGNOSIS PROCEDURE FOR MAGNET CLUTCH=NJHA0155SYMPTOM:
Magnet clutch does not operate when A/C switch and fan switch are ON.
INSPECTION FLOW
NHA387
*1: HA-92
*2: HA-53 (QG and YD engine with
common rail), HA-60 (YD engine
without common rail)*3: HA-35
*4: HA-34*5: EM-11 (QG),
EM-11 (YD)
TROUBLE DIAGNOSESMANUAL
Magnet Clutch
HA-52

MAGNET CLUTCH CIRCUIT (QG ENGINE AND YD
ENGINE WITH COMMON RAIL)
=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 G O T O 2 .
No Disconnect A/C relay. GO TO 3.
2 CHECK MAGNET CLUTCH COIL
Check for operation sound when applying battery voltage direct current toterminal.
RHA256I
OK or NG
NG Replace magnet clutch. Refer to HA-84.
GI
MA
EM
LC
EC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSESMANUAL
Magnet Clutch (Cont’d)
HA-53

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 G O T O 5 .
No Check power supply circuit and 10A (No. 15) fuse at fuse block. Refer to EL-14, “Wiring
Diagram — POWER —”.
5 CHECK A/C RELAY AFTER DISCONNECTING IT
Refer to HA-65.
OK or NG
OK Reconnect A/C relay. GO TO 6.
NG Replace A/C relay.
TROUBLE DIAGNOSESMANUAL
Magnet Clutch (Cont’d)
HA-54

6 CHECK COIL SIDE CIRCUIT OF A/C RELAY
Do approx. 12 volts exist between smart entrance control unit harness terminal No. 41 and body ground?
RHA257I
YesorNo
Ye s G O T O 8 .
No Disconnect A/C relay. Disconnect smart entrance control unit harness connector. GO TO
7.
7 CHECK CIRCUIT CONTINUITY BETWEEN A/C RELAY AND SMART ENTRANCE CONTROL UNIT HAR-
NESS
Check circuit continuity between A/C relay harness terminal No. 2 and smart entrance control unit harness terminal No.
41.
RHA258I
Continuity should exist.
If OK, check harness for short.
OK or NG
OK Check smart entrance control unit. Refer to EL-368.
NG Repair harness or connector.
GI
MA
EM
LC
EC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSESMANUAL
Magnet Clutch (Cont’d)
HA-55

8 CHECK VOLTAGE FOR COMBINATION METER (FAN ON SIGNAL)
Do approx. 12 volts exist between combination meter harness terminal No. 45 and body ground?
RHA259I
YesorNo
Yes QG engine: GO TO 9.
YD engine: GO TO 10.
No Check combination meter. Refer to EL-110.
9 CHECK REFRIGERANT PRESSURE SENSOR
Refer to HA-65.
OK or NG
OK GO TO 10.
NG Replace refrigerant pressure sensor.
10 CHECK A/C SWITCH
Refer to HA-65.
OK or NG
OK GO TO 11.
NG Replace heater control panel.
11 CHECK POWER SUPPLY FOR HEATER CONTROL PANEL (A/C SWITCH)
Do approx. 12 volts exist between heater control panel harness terminal No. 7 and body ground?
RHA260I
YesorNo
Yes GO TO 16.
No QG engine: GO TO 12.
YD engine: GO TO 13.
TROUBLE DIAGNOSESMANUAL
Magnet Clutch (Cont’d)
HA-56

12 CHECK CIRCUIT CONTINUITY BETWEEN HEATER CONTROL PANEL AND COMBINATIONMETER
Check circuit continuity between heater control panel harness terminal No. 7 and combination meter harness terminal No.
39.
RHA261I
Continuity should exist.
If OK, check harness for short.
OK or NG
OK Check combination meter. Refer to EL-110.
NG Repair harness or connector.
13 CHECK CIRCUIT CONTINUITY BETWEEN DUAL-PRESSURE SWITCH AND COMBINATION METER
Check circuit continuity between dual-pressure switch harness terminalNo. 2 and combination meter harness terminal No.
39.
RHA262I
Continuity should exist.
If OK, check harness for short.
OK or NG
OK GO TO 14.
NG Repair harness or connector.
14 CHECK DUAL-PRESSURE SWITCH
Refer to HA-65.
OK or NG
OK GO TO 15.
NG Repair dual-pressure switch.
GI
MA
EM
LC
EC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSESMANUAL
Magnet Clutch (Cont’d)
HA-57

15 CHECK CIRCUIT CONTINUITY BETWEEN DUAL-PRESSURE SWITCH AND HEATER CONTROL PANEL
Check circuit continuity between dual-pressure switch harness terminalNo. 1 and heater control panel harness terminal
No. 7.
RHA263I
Continuity should exist.
If OK, check harness for short.
OK or NG
OK Check combination meter. Refer to EL-110.
NG Repair harness or connector.
16 CHECK HEATER CONTROL PANEL CIRCUIT
Check circuit continuity between heater control panel harness terminal No. 8 and 18.
RHA267I
Continuity should exist.
If OK, check harness for short.
OK or NG
OK GO TO 17.
NG Repair harness or connector.
TROUBLE DIAGNOSESMANUAL
Magnet Clutch (Cont’d)
HA-58

17 CHECK CIRCUIT CONTINUITY BETWEEN COMBINATION METER AND HEATER CONTROLPANEL
Check circuit continuity between combination meter harness terminal No.45 and heater control panel harness terminal No.
18.
RHA265I
Continuity should exist.
If OK, check harness for short.
OK or NG
OK GO TO 18.
NG Repair harness or connector.
18 CHECK FAN SWITCH
Refer to HA-51.
YesorNo
Yes GO TO 19.
No Replace heater control panel.
19 CHECK BODY GROUND CIRCUIT
Check circuit continuity between heater control panel harness terminal No. 13 and body ground.
NHA506
Continuity should exist.
If OK, check harness for short.
OK or NG
OK GO TO 20.
NG Repair harness or connector.
GI
MA
EM
LC
EC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSESMANUAL
Magnet Clutch (Cont’d)
HA-59