2001 NISSAN ALMERA N16 heater

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)
NHA498
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©Replace heater control panel.
NG©Repair harness or connector.
NHA499
ELECTRICAL COMPONENT INSPECTIONNJHA0216Recirculation (REC) SwitchNJHA0216S01Check continuity between terminals.
Terminals REC switch Continuity
1-5ON Yes
OFF No
NHA500
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-45

RHA796H
COMPONENT DESCRIPTIONNJHA0217Max Hot Door MotorNJHA0217S01The max hot door motor is attached to the heater & cooling unit.
Mode door positionTemperature control
positionMax hot door position
FOOT, D/FFull hot OPEN
All except full hot SHUT
VENT, B/L, DEFFull hot SHUT
All except full hot SHUT
DIAGNOSTIC PROCEDURE FOR MAX HOT DOOR MOTOR CIRCUITNJHA0218
1 CHECK SIGNAL FOR OPEN OPERATION
1. Turn ignition switch to ON position.
2. Set temperature dial to ªFULL COLDº position, and mode control dial to the ªDEF (
)º, ªVENT ()º or ªBI-LEVEL
(
)º position.
3. Set temperature dial to ªFULL HOTº position, and mode control dial to the ªFOOT (
)º or ªFOOT/DEF ()º posi-
tion. At this time, does an approx. 12 volts exist between the max hot door motor harness connector terminal 7 and the
body ground until the max hot door is fully opened?
NHA501
YesorNo
Ye s©GO TO 2.
[If max hot door motor does not operate even if approx. 12 volts exist, then replace max
hot door motor. (Before replacing the motor, check for smooth operation of the door.)]
No©GO TO 3.
TROUBLE DIAGNOSES
Max Hot Door (For Scandinavia and Cold Spec Models) (Cont'd)
HA-51

2 CHECK SIGNAL FOR CLOSE OPERATION
1. Turn ignition switch to ON position.
2. Set temperature dial to ªFULL HOTº position, and mode control dial to the ªFOOT (
)º or ªFOOT/DEF ()º position
3. Set temperature dial to ªFULL COLDº position, and the mode control dial to the ªDEF (
)º, ªVENT ()º or ªBI-
LEVEL (
)º position. At this time, does an approx. 12 volts exist between the max hot door motor harness connector
terminal 6 and the body ground until the max hot door is fully closed?
NHA502
YesorNo
Ye s©INSPECTION END. (Max hot door motor is OK.)
[If max hot door motor does not operate even if approx. 12 volts exist, then replace the
max hot door motor. (Before replacing the motor, check for smooth operation of the
door.)]
No©GO TO 3.
3 CHECK SIGNAL CIRCUIT
1. Disconnect heater control panel harness connector and max hot door motor harness connector.
2. Check for continuity between heater control panel harness connector terminal 19 and max hot door motor harness con-
nector terminal 6, heater control panel harness connector terminal 21 and max hot door motor harness connector termi-
nal 7.
NHA503
Continuity should exist.
If OK, check harness for short.
YesorNo
Ye s©GO TO 4.
No©Repair harness or connector.
If harness and connector are OK, replace heater control panel.
TROUBLE DIAGNOSES
Max Hot Door (For Scandinavia and Cold Spec Models) (Cont'd)
HA-52

4 CHECK SIGNAL FOR POSITION SWITCH
1. Connect the heater control panel harness connector and the max hot door motor harness connector.
2. Check the voltage between the heater control panel harness connector terminal 20 and body ground, heater control
panel harness connector terminal 22 and body ground as shown in the condition below.
NHA504
OK or NG
OK©Position switch (max hot door motor) is OK.
NG©GO TO 5.
5 CHECK POSITION SWITCH (BUILT-IN MAX HOT DOOR MOTOR)
Check continuity between max hot door motor terminals 1 and 5, 4 and 5 as shown in the condition below.
NHA505
OK or NG
OK©INSPECTION END. (Position switch is OK.)
NG©Check harness for open or short between:
+Heater control panel harness connector terminals 20, 22 and max hot door harness
connector terminals 1, 4.
+Max hot door motor harness connector terminal 5 and body ground.
RHA855H
CONTROL LINKAGE ADJUSTMENTNJHA0219Max Hot DoorNJHA0219S011. Install max hot door motor on heater unit. Ensure that the max
hot door lever is fitted into the slit portion of max hot door link.
2. Connect the max hot door motor harness connector.
3. Turn ignition switch to ªONº position.
4. Turn the temperature control knob to full hot.
5. Check that max hot door operates properly when the mode
control knob is turned to FOOT or D/F, and other positions.
TROUBLE DIAGNOSES
Max Hot Door (For Scandinavia and Cold Spec Models) (Cont'd)
HA-53

6 CHECK CIRCUIT CONTINUITY BETWEEN BLOWER MOTOR AND RESISTOR
Check circuit continuity between blower motor harness terminal No. 2 and fan resistor harness terminal No. 1.
RHA700HA
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©Poor contact between the resistor and blower motor connector.
NG©Repair harness or connector.
7 CHECK GROUND CIRCUIT FOR HEATER CONTROL PANEL
Check circuit continuity between fan switch harness terminal No. 9 or 13 and body ground.
NHA506
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©GO TO 8.
NG©Repair harness or connector.
8 CHECK RESISTOR AFTER DISCONNECTING IT
(Refer to Electrical Components Inspection.)
(HA-60)
OK or NG
OK©GO TO 9.
NG©Replace resistor.
9 CHECK RESISTOR HARNESS CONNECTOR
Reconnect resistor harness connector.
OK or NG
1©GO TO 12.
2, 3, 4©GO TO 10.
TROUBLE DIAGNOSES
Blower Motor (Cont'd)
HA-57

10 CHECK FAN SWITCH CIRCUIT
Do approx. 12 volts exist between each fan switch harness terminal and body ground?
NHA507
YesorNo
Ye s©GO TO 13.
No©GO TO 11.
11 CHECK CIRCUIT CONTINUITY BETWEEN HEATER CONTROL PANEL AND RESISTOR
Check circuit continuity between heater control panel harness terminals and fan resistor harness terminals.
NHA508
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©GO TO 12.
NG©Repair harness or connector.
TROUBLE DIAGNOSES
Blower Motor (Cont'd)
HA-58

12 CHECK CIRCUIT CONTINUITY BETWEEN HEATER CONTROL PANEL AND BLOWER MOTOR
Check circuit continuity between heater control panel harness terminal No. 13 or 17 and blower motor harness terminal
No. 2.
NHA509
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-60)
OK or NG
OK©INSPECTION END
NG©Replace fan switch.
TROUBLE DIAGNOSES
Blower Motor (Cont'd)
HA-59

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. 23.
NHA511
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©Check ECM. Refer to EC-132 (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. 51 and body ground?
NHA512
YesorNo
Ye s©GO TO 9.
No©Check ECM. Refer to EC-132 (QG), EC-554 (YD), ªECM Terminals and Reference
Valueº.
9 CHECK REFRIGERANT PRESSURE SENSOR
Refer to HA-73.
OK or NG
OK©GO TO 10.
NG©Replace refrigerant pressure sensor.
10 CHECK A/C SWITCH
Refer to HA-73.
OK or NG
OK©GO TO 11.
NG©Replace heater control panel.
TROUBLE DIAGNOSES
Magnet Clutch (Cont'd)
HA-64