NISSAN X-TRAIL 2005 Service Repair Manual

TROUBLE DIAGNOSIS
MTC-7
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MTC

Operational CheckEJS001FE
The purpose of the operational check is to confirm that the system operates properly.
CHECKING BLOWER
1. Turn fan switch to 1st-speed. Blower should operate on low
speed.
2. Then turn fan switch to 2nd-speed, and continue checking
blower speed until all speeds are checked.
3. Leave blower on Max. speed.
If NG, go to trouble diagnosis procedure for MTC-15, "
Blower Motor
Circuit" .
If OK, continue with the check.
CHECKING DISCHARGE AIR
1. Turn mode control dial to each position.
2. Confirm that discharge air comes out according to the air distri-
bution table. Refer to MTC-5, "
Discharge Air Flow" .
If NG, go to trouble diagnosis procedure for MTC-9, "
Mode Door" .
If OK, continue the check.
CHECKING RECIRCULATION
1. Press REC switch. Recirculation indicator should eliminate.
2. Press REC switch again. Recirculation indicator should not illu-
minate.
3. Listen for intake door position change (you should hear blower
sound change slightly).
If NG, go to trouble diagnosis procedure for MTC-11, "
Intake Door
Motor Circuit" .
If OK, continue the check.Conditions :Engine running at usual operating temperature
RJIA0587E
RJIA0588E
RJIA0492E
RJIA0589E

MTC-8
TROUBLE DIAGNOSIS

CHECKING TEMPERATURE DECREASE
1. Turn temperature control dial to full cold position.
2. Check for cold air at discharge air outlets.
If NG, go to trouble diagnosis procedure for MTC-10, "
Air Mix Door"
If OK, continue the check.
CHECKING TEMPERATURE INCREASE
1. Turn temperature control dial to full hot position.
2. Check for hot air at discharge air outlets.
If NG, go to trouble diagnosis procedure for MTC-19, "
Insufficient
Heating" .
If all operational check are OK (symptom cannot be duplicated), go
to Incident Simulation Tests in GI-23, "
How to Perform Efficient Diag-
nosis for an Electrical Incident" and perform tests as outlined to sim-
ulate driving conditions environment. If symptom appears, refer to
MTC-3, "
SYMPTOM TABLE" and perform applicable trouble diagno-
sis procedures.
RJIA0590E
RJIA0591E

TROUBLE DIAGNOSIS
MTC-9
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MTC

Mode DoorEJS001FF
SYMPTOM: Air outlet does not change.
INSPECTION FLOW
*1MTC-5, "Discharge Air Flow".*2MTC-7, "Operational Check".*3MTC-31, "MODE DOOR".
*4MTC-3, "
SYMPTOM TABLE".
RJIA0592E

MTC-10
TROUBLE DIAGNOSIS

Air Mix DoorEJS001FG
SYMPTOM: Air mix door does not change.
INSPECTION FLOW
*1MTC-32, "AIR MIX DOOR".*2MTC-3, "SYMPTOM TABLE".*3MTC-7, "Operational Check".
RJIA0593E

TROUBLE DIAGNOSIS
MTC-11
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MTC

Intake Door Motor CircuitEJS004HC
SYMPTOM:

Intake door does not change.

Intake door motor does not operate normally.
INSPECTION FLOW
COMPONENT DESCRIPTION
Intake Door Motor
The 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.
*1MTC-11, "Intake Door Motor Circuit".*2MTC-7, "Operational Check".*3MTC-3, "SYMPTOM TABLE".
RJIA0594E
RJIA0519E

MTC-12
TROUBLE DIAGNOSIS

DIAGNOSTIC PROCEDURE FOR INTAKE DOOR MOTOR
SYMPTOM: Intake door does not operate normally.
1. CHECK POWER SUPPLY FOR HEATER CONTROL PANEL
1. Disconnect heater control panel connector.
2. Turn ignition switch ON.
3. Check voltage between heater control panel harness connector
M55 terminal 1 (BR/Y) and ground.
OK or NG
OK >> GO TO 2.
NG >> Check power supply circuit and 10 A fuse [No. 15,
located in the fuse block (J/B)]. Refer to PG-79, "
FUSE
BLOCK - JUNCTION BOX (J/B)" .

If OK, check harness for open circuit. Repair or replace if necessary.

If NG, replace fuse and check harness for short circuit. Repair or replace if necessary.
2. CHECK GROUND CIRCUIT FOR HEATER CONTROL PANEL
1. Turn ignition switch OFF.
2. Check continuity between heater control panel harness connec-
tor M55 terminal 5 (B) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK RECIRCULATION SWITCH CIRCUIT
1. Press REC (recirculation) switch.
2. Check continuity between heater control panel harness connec-
tor M55 terminal 1 (BR/Y) and 5 (B).
OK or NG
OK >> GO TO 4.
NG >> Replace heater control panel.
RJIA2846E
1 – Ground : Battery voltage
RJIA2923E
5 – Ground : Continuity should exist.
RJIA2924E
1 (−) – 5 (+) : Continuity should exist.
RJIA2925E

TROUBLE DIAGNOSIS
MTC-13
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MTC

4. CHECK POWER SUPPLY FOR INTAKE DOOR MOTOR
1. Reconnect heater control panel connector.
2. Turn ignition switch ON.
3. Check voltage between intake door motor harness connector M48 terminal 1 (Y/R: RHD models, R/W:
LHD models) and 2 (R/W: RHD models, L/R: LHD models).
OK or NG
OK >> Replace intake door motor.
NG >> GO TO 5.
ModelTerminals
Condition Voltage (+) (-)
Intake door motor
connectorTerminal No.
(wire color)Intake door motor
connectorTerminal No.
(wire color)
RHD
modelsM482 (R/W)
M481 (Y/R) REC SW: ON
Approx. 12V
1 (Y/R) 2 (R/W) REC SW: OFF
LHD
modelsM481 (R/W)
M482 (Y/R) REC SW: ON
Approx. 12V
2 (Y/R) 1 (R/W) REC SW: OFF
RJIA2847E

MTC-14
TROUBLE DIAGNOSIS

5. CHECK CIRCUIT CONTINUITY BETWEEN HEATER CONTROL PANEL AND INTAKE DOOR MOTOR
1. Turn ignition switch OFF.
2. Disconnect heater control panel connector and intake door motor connector.
3. Check continuity between heater control panel harness connector M55 terminal 10 (R/W) and intake door
motor harness connector M48 terminal 2 (R/W: RHD models) or 1 (R/W: LHD models).
4. Check continuity between heater control panel harness connector M55 terminal 11 (Y/R) and intake door
motor harness connector M48 terminal 1 (Y/R: RHD models) or 2 (Y/R: LHD models).
OK or NG
OK >> Replace heater control panel.
NG >> Repair harness or connector.
Te r m i n a l s
Continuity Heater control panel connec-
torIntake door motor connector
ConnectorTerminal No.
(wire color)ConnectorTerminal No.
(wire color)
M55 10 (R/W) M48 2 (R/W): RHD models
Ye s 1 (R/W): LHD models
M55 11 (Y/R) M48 1 (Y/R): RHD models
2 (Y/R): LHD models
RJIA3145E

TROUBLE DIAGNOSIS
MTC-15
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MTC

Blower Motor CircuitEJS001FI
SYMPTOM: Blower motor operation is malfunctioning.
INSPECTION FLOW
*1MTC-16, "DIAGNOSTIC PROCE-
DURE FOR BLOWER MOTOR".*2MTC-7, "
Operational Check".*3MTC-3, "SYMPTOM TABLE".
*4MTC-7, "
Operational Check".
RJIA0601E

MTC-16
TROUBLE DIAGNOSIS

DIAGNOSTIC PROCEDURE FOR BLOWER MOTOR
SYMPTOM: Blower motor operation is malfunctioning.
1. CHECK POWER SUPPLY FOR BLOWER MOTOR
1. Disconnect blower motor connector.
2. Turn ignition switch ON.
3. Check voltage between blower motor harness connector M65
terminal 1 (L/W) and ground.
OK or NG
OK >> GO TO 2.
NG >> Check power supply circuit and 15A fuses [Nos. 19 and
24, located in the fuse block (J/B)]. Refer to PG-79,
"FUSE BLOCK - JUNCTION BOX (J/B)" .

If OK, check harness for open circuit. Repair or replace if necessary.

If NG, replace fuse and check harness for short circuit. Repair or replace if necessary.
2. CHECK GROUND CIRCUIT FOR BLOWER MOTOR
1. Turn ignition switch OFF.
2. Turn fan switch to 1-speed.
3. Check continuity between blower motor harness connector M65
terminal 2 (L/B) and ground.
OK or NG
OK >> GO TO 3.
NG >> GO TO 4.
3. CHECK BLOWER MOTOR
Refer to MTC-18, "
Blower Motor" .
OK or NG
OK >> INSPECTION END
NG >> Replace blower motor.
RJIA0602E
1 – Ground : Battery voltage
RJIA2929E
2 – Ground : Continuity should exist.
RJIA2930E