Nissan Terrano model r20 series 2004. Manual — part 365
Diagnostic Procedure 3
SYMPTOM: Intake door does not change.
CHECK OPERATION
Does intake door motor (recirculation sys-
tem) operate, correctly?
NG
E
OK
Intake door motor (recir-
culation system) is OK.
CHECK POWER SUPPLY A/C CONTROL
PANEL
Disconnect A/C control panel harness con-
nector.
Do approx. 12 volts exist between A/C panel
harness connector terminal
q
1
and body
ground?
OK
E
NG
CHECK POWER SUP-
PLY CIRCUIT AND 10A
FUSE.
(Refer to “POWER
SUPPLY ROUTING” in
EL section and Wiring
Diagram).
CHECK POWER SUPPLY FOR INTAKE
DOOR MOTOR
I
Turn ignition switch ON.
Check voltage between intake door motor
terminal
q
1
and ground, a few seconds after
air recirculation switch is switched ON.
Do approx. 12 volts exist?
Check voltage between intake door motor
terminal
q
2
and ground, a few seconds after
air recirculation switch is switched OFF.
Do approx. 12 volts exist?
OK
E
NG
Check continuity
between intake door
motor terminal
q
1
(
q
2
)
and A/C control panel
terminal
q
10
(
q
11
).
If NG, repair harness or
connector.
OK
Replace A/C control
panel.
CHECK INTAKE DOOR MOTOR
Apply approx. 12 volts between intake door
motor terminals
q
1
(
q
2
) and
q
2
(
q
1
).
Does intake door motor operate, correctly?
OK
E
NG
Replace intake door
motor.
CHECK INTAKE DOOR LINKAGE
(Refer to “Control Linkage Adjustment,
HA-64.)
If OK, intake door is OK.
E
NG
Repair intake door link-
age.
YHA429
YHA430
YHA431
YHA432
H
H
H
H
H
TROUBLE DIAGNOSES
HA-60
Electrical Components Inspection
FAN SWITCH
Check continuity between terminals at each switch position.
TERMINAL
LEVER
POSITION
OFF
1
2
3
4
5
o
2
o
3
o
4
o
1
o
o
o
o
6
o
o
o
o
BLOWER MOTOR
Confirm smooth rotation of the blower motor.
I
Ensure that there are no foreign particles inside the intake unit.
BLOWER RESISTOR
Check continuity between terminals.
A/C SWITCH
Check continuity between component terminals.
A/C control panel con-
nector terminal No.
A/C switch condition
Continuity
q
1
—
q
7
ON
YES
OFF
NO
q
1
—
q
8
ON
YES
OFF
NO
q
7
—
q
8
ON
YES
OFF
NO
RHA351I
RHA021E
RHA346I
YHA437
TROUBLE DIAGNOSES
HA-61
DUAL-PRESSURE SWITCH
High-pressure side line pressure
kPa (bar, kg/cm
2
, psi)
Opera-
tion
Conti-
nuity
Decreasing to 157 - 216 (1.6 - 2.2, 1.6 - 2.2, 23 - 31)
Increasing to 2,452 - 2,844 (24.5 - 28.4, 25 - 29, 356 - 412)
Turn
OFF
Does
not
exist
Increasing to 157 - 235 (1.6 - 2.4, 1.6 - 2.4, 23 - 34)
Decreasing to 1,863 - 2,256 (18.6 - 22.6, 19 - 23, 270 - 327)
Turn
ON
Exists
THERMO CONTROL AMP.
Evaporator outlet air temperature
°C (°F)
Thermo amp.
operation
Tester
Decreasing to 0.1 - 0.9 (32 - 34)
Turn OFF
Approx. 12V
Increasing to 2.5 - 3.5 (37 - 38)
Turn ON
Approx. 0V
A/C RELAY, COOLING FAN RELAY
Check circuit continuity between terminals by supplying 12 volts to
coil side terminals of relay.
Apply 12V to terminals
q
1
and
q
2
and check continuity between
terminals
q
3
and
q
5
.
Conditions
Continuity
12V direct current supply between terminals
q
1
and
q
2
YES
No current supply
NO
If NG, replace relay.
Refer to EL section for Description.
Control Linkage Adjustment
VENTILATOR DOOR CONTROL ROD
1. Move side link in direction of arrow.
2. With upper and lower ventilator door levers held in the direction
of the arrow, connect rods
q
1
and
q
2
to their corresponding
ventilator door levers in that order.
RHA023E
YHA435
YHA436
RHA024E
TROUBLE DIAGNOSES
Electrical Components Inspection (Cont’d)
HA-62
DEFROSTER DOOR CONTROL ROD
1. Move side link in direction of arrow.
2. Connect rod to side link while pushing defroster door lever in
direction of arrow.
AIR CONTROL CABLE
For L.H. drive model
I
Move air control lever to
position.
Set side link in VENT mode.
Pull outer cable in direction of arrow and then clamp it.
For R.H. drive model
I
Move air control lever to
position.
Set side link in DEF mode.
Pull outer cable in direction of arrow and then clamp it.
After positioning control cable, check that it operates properly.
RHA025E
RHA026E
RHA027E
RHA347I
RHA348I
TROUBLE DIAGNOSES
Control Linkage Adjustment (Cont’d)
HA-63
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