2002 NISSAN TERRANO Service Repair Manual

qC
CHECK A/C RELAY AFTER DISCON-
NECTING IT.
(Refer to Electrical Components
Inspection.)
OK
ENG
Replace A/C relay.
Reconnect A/C relay.
Note
CHECK COIL SIDE CIRCUIT OF A/C
RELAY.
Do approx. 12 volts exist between
ECM harness connector terminal No.
204(TD27Ti models) orq15(ZD30DDTi
models) and body ground?
OK
ENG
ITurn ignition switch OFF.
Check circuit continuity
between A/C relay harness
terminal No.q
1and ECM
harness connector terminal
No.
204(TD27Ti models)
orq
15(ZD30DDTi models).
CHECK VOLTAGE FOR THERMO
CONTROL AMP.
Do more than 8 volts exist between
thermo-control amp. harness connector
terminal No.q
2and body ground?
OK
ENG
ITurn ignition switch OFF.
Check circuit continuity
between thermo-control
amp. harness connector
terminal No.q
2and dual-
pressure switch connector
terminal No.q
2.
OK
q
D
(Go to next page.)CHECK DUAL-PRES-
SURE SWITCH.
(Refer to Electrical Compo-
nents Inspection.)
NGOK
q
E
(Go to page HA-58.)Replace dual-pressure
switch.
Note:
If the result is NG after checking circuit continuity, repair harness or connec-
tor.
YHA421
YHA422
YHA423
YHA424
H
H
H
H
HH
HH
TROUBLE DIAGNOSES
Diagnostic Procedure 2 (Cont'd)
HA-56

qD
CHECK POWER SUPPLY FOR
THERMO-CONTROL AMP.
Go to Main Power Supply and Ground
Circuit Check.
OK
ITurn ignition switch OFF.
CHECK BODY GROUND CIRCUIT FOR
THERMO-CONTROL AMP.
Disconnect thermo-control amp. harness
connector.
Ensure A/C switch is in ON position.
Ensure fan switch is in ON position
(1 to 4).
Does continuity exist between thermo
control amp. harness connector terminal
No.q
3and body ground?
OK
ENG
Disconnect fan switch har-
ness connector.
Ensure A/C switch is in ON
position.
Note
Check circuit continuity
between thermo-control
amp. harness connector
terminal No.q
3and fan
switch harness connector
terminal No.q
6.
NG
Replace thermo-control amp.
Check A/C switch (Refer to
Electrical Components
Inspection, HA-60)
OK
Repair harness or connec-
tors.
Note
CHECK BODY GROUND CIRCUIT FOR
FAN SWITCH.
Does continuity exist between fan switch
harness connector terminal
No.q
1and body ground?
OK
CHECK FAN SWITCH.
(Refer to Electrical Components Inspec-
tion.)
NG
Replace fan switch.
Note:
If the result is NG after checking circuit continuity, repair harness or connec-
tor.
YHA425
YHA426
YHA427
H
H
H
HH
H
H
H
TROUBLE DIAGNOSES
Diagnostic Procedure 2 (Cont'd)
HA-57

qE
Note
Check circuit continuity between ECM
harness connector terminal No.q
21
(ZD30DDTi) or403(TD27Ti) and dual-
pressure switch harness connector termi-
nal No.q
1.
OK
CHECK ECM.
(Refer to EF & EC section.)
Note:
If the result is NG after checking circuit continuity, repair harness or connec-
tor.
YHA428
H
H
TROUBLE DIAGNOSES
Diagnostic Procedure 2 (Cont'd)
HA-58

Diagnostic Procedure 3
SYMPTOM: Intake door does not change.
CHECK OPERATION
Does intake door motor (recirculation sys-
tem) operate, correctly?
NG
EOK
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 terminalq
1and body
ground?
OK
ENG
CHECK POWER SUP-
PLY CIRCUIT AND 10A
FUSE.
(Refer to ªPOWER
SUPPLY ROUTINGº in
EL section and Wiring
Diagram).
CHECK POWER SUPPLY FOR INTAKE
DOOR MOTOR
ITurn ignition switch ON.
Check voltage between intake door motor
terminalq
1and ground, a few seconds after
air recirculation switch is switched ON.
Do approx. 12 volts exist?
Check voltage between intake door motor
terminalq
2and ground, a few seconds after
air recirculation switch is switched OFF.
Do approx. 12 volts exist?
OK
ENG
Check continuity
between intake door
motor terminalq
1(q2)
and A/C control panel
terminalq
10(q11).
If NG, repair harness or
connector.
OK
Replace A/C control
panel.
CHECK INTAKE DOOR MOTOR
Apply approx. 12 volts between intake door
motor terminalsq
1(q2) andq2(q1).
Does intake door motor operate, correctly?
OK
ENG
Replace intake door
motor.
CHECK INTAKE DOOR LINKAGE
(Refer to ªControl Linkage Adjustment.)
If OK, intake door is OK.ENG
Repair intake door link-
age.
YHA429
YHA430
YHA431
YHA432
H
H
H
H
H
TROUBLE DIAGNOSES
HA-59

Electrical Components Inspection
FAN SWITCH
Check continuity between terminals at each switch position.
TERMINALLEVER
POSITIONOFF 1234
5o
2o
3o
4o
1 oooo
6 oooo
BLOWER MOTOR
Confirm smooth rotation of the blower motor.
IEnsure 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 conditionContinuity
q1Ðq7ONYES
OFFNO
q1Ðq8ONYES
OFFNO
q7Ðq8ONYES
OFFNO
YHA433
RHA021E
YHA434
YHA437
TROUBLE DIAGNOSES
HA-60

DUAL-PRESSURE SWITCH
High-pressure side line pressure
kPa (kg/cm2, psi)Operation Continuity
Decreasing to 157 - 216 (1.6 - 2.2, 23 - 31)
Increasing to 2,452 - 2,844 (25 - 29, 356 - 412)Turn OFFDoes not
exist
Increasing to 157 - 235 (1.6 - 2.4, 23 - 34)
Decreasing to 1,863 - 2,256 (19 - 23, 270 - 327)Turn ON Exists
THERMO CONTROL AMP.
Evaporator outlet air temperature
ÉC (ÉF)Thermo amp.
operationTester
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 terminalsq
1andq2and check continuity between
terminalsq
3andq5.
Conditions Continuity
12V direct current supply between terminalsq
1
andq2YES
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 rodsq
1andq2to their corresponding ven-
tilator door levers in that order.
RHA023E
YHA435
YHA436
RHA024E
TROUBLE DIAGNOSES
Electrical Components Inspection (Cont'd)
HA-61

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
IMove air control lever toposition.
Set side link in VENT mode.
Pull outer cable in direction of arrow and then clamp it.
For R.H. drive model
IMove air control lever toposition.
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
RHA028E
RHA029E
TROUBLE DIAGNOSES
Control Linkage Adjustment (Cont'd)
HA-62

WATER COCK CONTROL ROD
IWhen adjusting water cock control rod, first disconnect
temperature control cable from air mix door lever and then
adjust control rod. Reconnect temperature control cable
and readjust it. (Refer to next item.)
1. Push air mix door lever in direction of arrow.
2. Pull control rod of water cock in direction of arrow so as to make
clearance of about 2 mm (0.08 in) between ends of rod and link
lever and connect the rod to door lever.
After connecting control rod, check that it operates properly.
TEMPERATURE CONTROL CABLE
IWhen adjusting ventilator door rod and defroster door rod,
first disconnect air control cable from side link.
Reconnect and readjust air control cable.
For L.H. drive model
IMove temperature control lever to max. COLD position. Set air
mix door lever in full cold mode. Pull outer cable in direction of
arrow and then clamp it.
For R.H. drive model
IMove temperature control lever to max. HOT position. Set air
mix door lever in full hot mode. Pull outer cable in direction of
arrow and then clamp it.
After positioning control cable, check it operates properly.
INTAKE DOOR CONTROL LINKAGE
IAdjust the portion of connecting rod where indicated with arrow
as shown in figure.
RHA030E
RHA031E
RHA032E
NHA355
NHA356
TROUBLE DIAGNOSES
Control Linkage Adjustment (Cont'd)
HA-63