NISSAN ALMERA TINO 2001 Service Repair Manual

12 CHECK CIRCUIT CONTINUITY BETWEEN HEATER CONTROL PANEL AND BLOWER MOTOR
Check circuit continuity between heater control panel harness terminal No. 17 and blower motor harness terminal No. 2.
NHA418
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©GO TO 13.
NG©Repair harness or connector.
13 CHECK FAN SWITCH AFTER DISCONNECTING IT
(Refer to Electrical Components Inspection.)
(HA-61)
OK or NG
OK©INSPECTION END
NG©Replace fan switch.
TROUBLE DIAGNOSES
Blower Motor (Cont’d)
HA-60

NHA386
ELECTRICAL COMPONENTS INSPECTION=NLHA0146Fan SwitchNLHA0146S01Check continuity between terminals at each switch position.
KNOB POSITION Continuity between terminals
OFF No continuity
113—14—18
213—15—18
313—16—18
413—17—18
Blower MotorNLHA0146S02Confirm smooth rotation of the blower motor.
+Ensure that there are no foreign particles inside the intake unit.
RHA706H
Blower ResistorNLHA0146S03Check resistance between terminals.
Terminal No.
Resistance
(+) ()
4
1Approx. 2.4 - 2.8Ω
3 Approx. 0.58 - 0.7Ω
2 Approx. 0.22 - 0.26Ω
TROUBLE DIAGNOSES
Blower Motor (Cont’d)
HA-61

Magnet Clutch
TROUBLE DIAGNOSIS PROCEDURE FOR MAGNET CLUTCH=NLHA0155SYMPTOM:
+Magnet clutch does not operate when A/C switch and fan switch are ON.
INSPECTION FLOW
NHA387
*1: HA-100
*2: HA-63*3: HA-41
*4: HA-40*5: EM-17 (QG), EM-166 (YD),
EM-86 (SR)
TROUBLE DIAGNOSES
Magnet Clutch
HA-62

MAGNET CLUTCH CIRCUIT (FOR QG AND SR ENGINE)=NLHA0156SYMPTOM:
+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?
NHA419
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-92
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.
NHA420
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-63

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 EL-10,“Wiring
Diagram—POWER—”.
5 CHECK A/C RELAY AFTER DISCONNECTING IT
Refer to HA-73.
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. 23 and body ground?
NHA421
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-64

7 CHEC KCIRCUI TCONTINUIT YBETWEE NA/C REL AY AN DEC MHARNESS
NHA422
8 CHEC KVO LTAG EFO RECM
NHA423
9 CHEC KREFRIGERAN TPRESSUR ESENSOR
Magne tClutc h(Cont ’d)

10 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?
NHA472
YesorNo
Ye s©GO TO 12.
No©+For Europe: GO TO 11.
11 CHECK CIRCUIT CONTINUITY BETWEEN HEATER CONTROL PANEL AND ECM
Check circuit continuity between heater control panel harness terminal No. 7 and ECM harness terminal No. 44.
NHA473
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©Check ECM. Refer to EC-134 (QG), EC-659 (SR),“ECM Terminals and Reference
Value”.
NG©Repair harness or connector.
TROUBLE DIAGNOSES
Magnet Clutch (Cont’d)
HA-66

12 CHECK HEATER CONTROL PANEL CIRCUIT
Check circuit continuity between heater control panel harness terminal No. 8 and 18.
NHA474
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©GO TO 13.
NG©Repair harness or connector.
13 CHECK CIRCUIT CONTINUITY BETWEEN ECM AND HEATER CONTROL PANEL
Check circuit continuity between ECM harness terminal No. 51 and heater control panel harness terminal No. 18.
NHA427
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-61.
YesorNo
Ye s©GO TO 15.
No©Replace heater control panel.
TROUBLE DIAGNOSES
Magnet Clutch (Cont’d)
HA-67

15 CHECK BODY GROUND CIRCUIT
Check circuit continuity between heater control panel harness terminal No. 13 and body ground.
NHA428
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©INSPECTION END
NG©Repair harness or connector.
TROUBLE DIAGNOSES
Magnet Clutch (Cont’d)
HA-68

MAGNET CLUTCH CIRCUIT (FOR YD ENGINE)=NLHA0203SYMPTOM:
+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?
NHA419
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-92
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.
NHA420
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-69