NISSAN ALMERA N16 2003 Electronic Repair Manual

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
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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
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ST
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BT
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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
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BT
SC
EL
IDX
TROUBLE DIAGNOSESMANUAL
Magnet Clutch (Cont’d)
HA-59

20 CHECK CAN COMMUNICATION
Check CAN communication. Refer to EL-509.
Combination meter - Smart entrance control unit
Combination meter - ECM
ECM - Smart entrance control unit
OK or NG
OK INSPECTION END
NG Repair or replace malfunctioning part(s).
MAGNET CLUTCH CIRCUIT (YD ENGINE WITHOUT
COMMON RAIL)
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 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.
TROUBLE DIAGNOSESMANUAL
Magnet Clutch (Cont’d)
HA-60

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.
GI
MA
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LC
EC
FE
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SU
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BT
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EL
IDX
TROUBLE DIAGNOSESMANUAL
Magnet Clutch (Cont’d)
HA-61

6 CHECK COIL SIDE CIRCUIT OF A/C RELAY
Do approx. 12 volts exist between ECM harness terminal No. 204 and body ground?
NHA517
YesorNo
Ye s G O T O 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. 204.
NHA518
Continuity should exist.
If OK, check harness for short.
OK or NG
OK Check ECM. Refer to EC-66 (YD), “ECM Terminals and Reference Value”.
NG Repair harness or connector.
8 CHECK VOLTAGE FOR ECM
Do approx. 12 volts exist between ECM harness terminal No. 403 and body ground?
NHA519
YesorNo
Ye s G O T O 9 .
No Check ECM. Refer to EC-66 (YD), “ECM Terminals and Reference Value”.
TROUBLE DIAGNOSESMANUAL
Magnet Clutch (Cont’d)
HA-62

9 CHECK POWER SUPPLY FOR DUAL-PRESSURE SWITCH
Do approx. 12 volts exist between dual-pressure switch harness terminal No. 2 and body ground?
RHA775H
YesorNo
Yes GO TO 10.
No Repair harness or connector.
10 CHECK DUAL-PRESSURE SWITCH
Refer to HA-65.
OK or NG
OK GO TO 11.
No Replace dual-pressure switch.
11 CHECK CIRCUIT CONTINUITY BETWEEN DUAL-PRESSURE SWITCH AND HEATER CONTROL PANEL
(A/C SWITCH)
Check circuit continuity between dual-pressure switch harness terminalNo. 1 and heater control panel harness terminal
No. 7.
RHA266I
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-65.
OK or NG
OK GO TO 13.
NG Replace A/C 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-63

13 CHECK HEATER CONTROL PANEL CIRCUIT
Check circuit continuity between heater control panel harness terminal No. 8 and No. 18.
RHA267I
Continuity should exist.
If OK, check harness for short.
OK or NG
OK GO TO 14.
NG Repair harness or connector.
14 CHECK FAN SWITCH
Refer to HA-51.
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.
TROUBLE DIAGNOSESMANUAL
Magnet Clutch (Cont’d)
HA-64