NISSAN X-TRAIL 2003 Electronic Repair Manual

TROUBLE DIAGNOSIS
MTC-15
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MTC
1.CHECK POWER SUPPLY FOR BLOWER MOTOR
Disconnect blower motor harness connector.
OK or NG
OK >> GO TO 2.
NG >> Check power supply circuit and 15A fuses (Nos. 19 and
24, located in the fuse block). Refer toPG-3, "
BATTERY
POWER SUPPLY—IGNITION SW. IN ANY POSITION".
lIf OK, check for open circuit in wiring harness. Repair or replace as necessary.
lIf NG, replace fuse and check wiring harness for short circuit. Repair or replace as necessary.
2.CHECKBODYGROUNDCIRCUITFORBLOWERMOTOR
OK or NG
OK >> GO TO 3.
NG >> GO TO 4.
3.CHECKBLOWERMOTOR
Refer toMTC-17
.
OK or NG
OK >> INSPECTION END
NG >> Replace blower motor.
4.CHECK CIRCUIT CONTINUITY BETWEEN BLOWER MOTOR AND FAN RESISTOR
Disconnect fan resistor connector.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
Terminals
Vo ltag e (+) (-)
ConnectorTe r m i n a l
(Wire coor)-
M65 (L/W) Ground Approx. 12V
RJIA0603E
Terminals Condition
Continuity
ConnectorTe r m i n a l
(Wire color)--
M65 2 (B) Ground FAN SW: ON Yes
RJIA0604E
Te r m i n a l s
Continuity Fan resistor connector Blower motor connector
ConnectorTe r m i n a l
(Wire color)ConnectorTe r m i n a l
(Wire color)
M66 1 (L/B) M65 2 (L/B) Yes
RJIA0605E

MTC-16
TROUBLE DIAGNOSIS
5.CHECK FAN RESISTOR
Refer toMTC-17, "
Blower Fan Resistor".
OK or NG
OK >> GO TO 6.
NG >> Replace fan resistor.
6.CHECK CIRCUIT CONTINUITY BETWEEN FAN RESISTOR AND HEATER CONTROL PANEL
Disconnect heater control panel connector.
OK or NG
OK >> GO TO 7.
NG >> Repair harness or connector.
7.CHECK CIRCUIT CONTINUITY BETWEEN BLOWER MOTOR AND HEATER CONTROL PANEL
OK or NG
OK >> GO TO 8.
NG >> Repair harness or connector.
8.CHECK FAN SWITCH
Refer toMTC-17, "
Fan Switch".
OK or NG
OK >> GO TO 9.
NG >> Replace fan switch.
9.CHECK GROUND CIRCUIT
OK or NG
OK >> INSPECTION END
NG >> Repair harness or connector.
Te r m i n a l s
Continuity Fan resistor connector Heater control panel connector
ConnectorTerminal
(Wire color)ConnectorTerminal
(Wire color)
M66 2 (L/R) M54 16 (L/R)
Ye s M66 3 (L/Y) M54 15 (L/Y)
M66 4 (L/W) M54 14 (L/W)
RJIA0606E
Te r m i n a l s
Continuity Blower motor connector Heater control panel connector
ConnectorTe r m i n a l
(Wire color)ConnectorTerminal (Wire
color)
M65 2 (L/B) M54 17 (L/B) Yes
RJIA0607E
Te r m i n a l s
Continuity
ConnectorTe r m i n a l
(Wire color)-
M54 13 (B) Ground Yes
RJIA0608E

TROUBLE DIAGNOSIS
MTC-17
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MTC
COMPONENT INSPECTION
Blower Motor
Confirm smooth rotation of the blower motor.
lEnsure that there are no foreign particles inside the intake unit.
Fan Switch
Check continuity between terminals at each switch position.
Blower Fan Resistor
Check continuity between terminals.
Insufficient HeatingEJ S00 1F J
SYMPTOM: Insufficient heating
RJIA0609E
Switch position Connector Terminals Continuity
OFF
M5413 - 14, 15, 16, 17 No
113-14
Ye s 213-15
313-16
413-17
RJIA0610E
Terminals Continuity
M66 - 1M66 - 2
Ye s M66 - 3
M66 - 4
RJIA0611E

MTC-18
TROUBLE DIAGNOSIS
INSPECTION FLOW
*1 QR20DE:CO-9, "Changing Engine
Coolant",YD22DDTi:
CO-30, "
Changing Engine Coolant"
*2 QR20DE:CO-13, "CHECKING RADI-
AT O R C A P", YD22DTi:CO-34,
"Checking Radiator Cap"
*3 :QR20DE:
(Water temperature sensor),
YD22DTi:CO-42, "
Removal and
Installation"
(Thermostat)
*4 QR20DE:CO-9, "
Changing Engine
Coolant",YD22DTi:CO-30, "Chang-
ing Engine Coolant"
*5MTC-7, "Operational Check"*6MTC-3, "SYMPTOM TABLE"
RJIA0612E

CONTROLLER
MTC-19
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MTC
CONTROLLERPFP:27500
Removal and InstallationEJS001F7
1. Remove the mode control cable and air mix control cable from
heater unit.
2. Remove the cluster lid finisher.
3. Remove the fixing screw from heater control panel.
4. Remove the heater control panel, then remove the heater con-
trol panel connector.
Disassembly and AssemblyEJS001F8
RJIA0089E
RJIA0090E

MTC-20
BLOWER MOTOR
BLOWER MOTOR
PFP:27226
Removal and InstallationEJS000XK
1. Remove the blower unit.
2. Separate the blower unit.
3. Remove the cooling hose, blower fan resistor and blower fan.
RJIA0054E
RJIA0092E

BLOWER FAN RESISTOR
MTC-21
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MTC
BLOWER FAN RESISTORPFP:27150
Removal and InstallationEJS000XL
1. Remove the glove box cover.
2. Remove the blower fan resistor.
CAUTION:
Do not repair the thermal fuse of the fan resistor.
RJIA0093E

MTC-22
INTAKE DOOR MOTOR
INTAKE DOOR MOTOR
PFP:27730
Removal and InstallationEJS000XM
1. Remove the blower unit.
2. Remove the intake door motor from blower unit.
RJIA0056E
RJIA0571E

HEATER UNIT
MTC-23
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MTC
HEATER UNITPFP:27100
Removal and InstallationEJS001F9
REMOVAL
1. Drain coolant from cooling system.
2. Disconnect two heater hoses from heater core pipe.
3. Remove the instrument panel.
4. Remove the blower unit.
5. Remove the clips of vehicle harness from steering member.
6. Remove the instrument stay.
NOTE:
This illustration is for RHD models. The layout for LHD models is symmetrically opposite.
RJIA0060E
RJIA0061E
RJIA0062E

MTC-24
HEATER UNIT
7. Remove the mounting bolts from heater unit.
8. Remove the steering member.
9. Remove the heater unit.
INSTALLATION
1. Installation is basically the reverse order of removal.
NOTE:
When filling radiator with coolant, refer to QR20DE:CO-9, "
Changing Engine Coolant",YD22DDTi:CO-30,
"Changing Engine Coolant".
Disassembly and AssemblyEJS001FA
NOTE:
This illustration is for RHD models. The layout for LHD models is symmetrically opposite.
RJIA0063E
1 Screw 2 Air mix door link 3 Air mix door gear
4Screw 5Cablebracket 6Screw
7 Foot duct (right) 8 Screw 9 Ventilator door link 2
10 Ventilator door link 2 11 Ventilator door lever 12 Main link
13 Max cool door lever 14 Defroster door lever 15 Heater case (right)
16 Defroster door 17 Ventilator door 18 Max cool door
19 Heater case (left) 20 Screw 21 Heater pipe support
RJIA0613E