NISSAN ALMERA 2001 Service Manual

NHA481
TROUBLE DIAGNOSES
Wiring Diagram Ð A/C, M Ð (Cont'd)
HA-31

NHA482
TROUBLE DIAGNOSES
Wiring Diagram Ð A/C, M Ð (Cont'd)
HA-32

How to Perform Trouble Diagnoses for Quick
and Accurate Repair
NJHA0129WORK FLOWNJHA0129S01
SHA900E
*1: HA-34
SYMPTOM TABLENJHA0129S02
Symptom Reference page
+Intake door does not change.+Go to Trouble Diagnosis Procedure for Intake Door. HA-36
+Air outlet does not change.+Go to Trouble Diagnosis Procedure for mode door. HA-40
+Air mix door does not change.+Go to Trouble Diagnosis Procedure for Air mix door. HA-42
+Max hot door does not change.+Go to Trouble Diagnosis Procedure for Max Hot Door. HA-44
+Blower motor does not rotate at all.+Go to Trouble Diagnosis Procedure for Blower Motor. HA-48
+Magnet clutch does not engage when A/C switch and
fan switch are ON.+Go to Trouble Diagnosis Procedure for Magnet Clutch. HA-55
+Insufficient cooling.+Go to Trouble Diagnosis Procedure for Insufficient cool-
ing.HA-68
+Insufficient heating.+Go to Trouble Diagnosis Procedure for Insufficient
heating.HA-76
+Noise+Go to Trouble Diagnosis Procedure for Noise. HA-77
TROUBLE DIAGNOSES
How to Perform Trouble Diagnoses for Quick and Accurate Repair
HA-33

Operational Check=NJHA0130The purpose of the operational check is to confirm that the system
operates properly.
CONDITIONS:NJHA0130S01+Engine running and at normal operating temperature.
NHA374
PROCEDURE:NJHA0130S021. Check BlowerNJHA0130S02011. Turn fan switch to 1-speed.
Blower should operate on 1-speed.
2. Then turn fan switch to 2-speed, and continue checking blower
speed until all speeds are checked.
3. Leave blower on 4-speed.
If NG, go to trouble diagnosis procedure for blower motor (HA-48).
If OK, continue with next check.
NHA375
2. Check Discharge AirNJHA0130S02021. Turn mode control knob to each position.
RHA654FK
2. Confirm that discharge air comes out according to the air dis-
tribution table at left.
Refer to ªDischarge Air Flowº, HA-20.
If NG, go to trouble diagnosis procedure for mode door motor
(HA-40).
If OK, continue with next check.
TROUBLE DIAGNOSES
Operational Check
HA-34

NHA377
3. Check RecirculationNJHA0130S02031. Press the Recirculation (REC) switch. Recirculation indicator
should illuminate.
2. Listen for intake door position change.
If NG, go to trouble diagnosis procedure for intake door (HA-36).
If OK, continue with next check.
NHA378
4. Check Temperature DecreaseNJHA0130S02041. Turn the temperature control knob to full cold.
2. Check for cold air at discharge air outlets.
If NG, go to trouble diagnosis procedure for insufficient cooling
(HA-68).
If OK, continue with next check.
NHA379
5. Check Temperature IncreaseNJHA0130S02051. Turn the temperature control knob to full hot.
2. Check for hot air at discharge air outlets.
If NG, go to trouble diagnosis procedure for insufficient heating
(HA-76).
NHA380
6. Check Air Conditioner SwitchNJHA0130S0206Turn the fan control switch to the desired (1 to 4 speed) position
and push the A/C switch to turn ON the air conditioner.
The indicator lamp should come on when air conditioner is ON.
If NG, go to trouble diagnosis procedure for magnet clutch (HA-55).
TROUBLE DIAGNOSES
Operational Check (Cont'd)
HA-35

Intake Door
TROUBLE DIAGNOSIS PROCEDURE FOR INTAKE DOOR=NJHA0133SYMPTOM:
+Intake door does not change.
INSPECTION FLOW
NHA381
*1: HA-34 *2: HA-33 *3: HA-37
TROUBLE DIAGNOSES
Intake Door
HA-36

RHA623H
COMPONENT DESCRIPTIONNJHA0209Intake Door MotorNJHA0209S01The intake door motor is attached to the intake unit. It rotates so
that air is drawn from inlets set by the heater control panel. Motor
rotation is conveyed to a lever which activates the intake door.
DIAGNOSTIC PROCEDURE FOR INTAKE DOOR
MOTOR CIRCUIT
NJHA0210
1 CHECK POWER SUPPLY FOR HEATER CONTROL PANEL
Do approx. 12 volts exist between heater control panel harness terminal No. 1 and body ground?
NHA483
YesorNo
Ye s©GO TO 2.
No©Check 10A (No. 15) fuse at fuse block. Refer to Sedan: EL-11 (QG), EL-19 (YD), Hatch-
back: EL-28, ªWiring Diagram Ð POWER к.
2 CHECK RECIRCULATION (REC) SWITCH
Refer to HA-39.
OK or NG
OK©GO TO 3.
NG©Replace recirculation (REC) switch.
TROUBLE DIAGNOSES
Intake Door (Cont'd)
HA-37

3 CHECK GROUND CIRCUIT FOR RECIRCULATION (REC) SWITCH
Check circuit continuity between heater control panel harness terminal No. 5 and body ground.
NHA484
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 INTAKE DOOR MOTOR
Do approx. 12 volts exist between intake door motor harness terminal No. 1, 2 and body ground?
RHA758H
YesorNo
Ye s©Replace intake door motor.
No©GO TO 5.
TROUBLE DIAGNOSES
Intake Door (Cont'd)
HA-38

5 CHECK CIRCUIT CONTINUITY BETWEEN HEATER CONTROL PANEL AND INTAKE DOOR MOTOR
Check circuit continuity between heater control panel harness terminal No. 10 (11) and intake door motor harness terminal
No. 2 (1)
NHA485
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©Replace heater control panel.
NG©Repair harness or connector.
NHA486
ELECTRICAL COMPONENT INSPECTIONNJHA0216Recirculation (REC) SwitchNJHA0216S01Check continuity between terminals.
Terminals REC switch Continuity
1-5ON Yes
OFF No
RHA926H
Intake Door MotorNJHA0216S02Supply 12V direct current to intake door motor terminal No. 1 and
2.
12V direct current supply terminals
Intake door position
+þ
1 2 FRE
2 1 REC
TROUBLE DIAGNOSES
Intake Door (Cont'd)
HA-39

Mode Door
TROUBLE DIAGNOSIS PROCEDURE FOR MODE DOOR=NJHA0137SYMPTOM:
+Air outlet does not change.
INSPECTION FLOW
NHA382
*1: HA-20
*2: HA-34*3: HA-41 *4: HA-33
TROUBLE DIAGNOSES
Mode Door
HA-40