NISSAN X-TRAIL 2001 Service Repair Manual

TROUBLE DIAGNOSIS
MTC-5
C
D
E
F
G
H
I
K
L
MA
B
MTC
Discharge Air FlowEJS001HF
RJIA0483E

MTC-6
TROUBLE DIAGNOSIS
Wiring Diagram-HEATER
EJS001FD
TJWA0009E

TROUBLE DIAGNOSIS
MTC-7
C
D
E
F
G
H
I
K
L
MA
B
MTC
Operational CheckEJS001FE
The purpose of the operational check is to confirm that the system operates properly.
CHECKING BLOWER
1. Turn fan switch to 1-speed. Blower should operate on low
speed.
2. Then turn fan switch to 2-speed, and continue checking blower
speed until all speeds are checked.
3. Leave blower on 4-speed.
If NG, go to trouble diagnosis procedure for MTC-14, "
Blower Motor
Circuit" .
If OK, continue with next check.
CHECKING DISCHARGE AIR
1. Set the 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" .
Intake door position is checked in the next step.
If NG, go to trouble diagnosis procedure for mode door motor.
If OK, continue with next check.
CHECKING RECIRCULATION
1. Press REC switch one time. Recirculation indicator should illu-
minate.
2. 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 with next check.Conditions :Engine running and at normal operating temperature
RJIA0587E
RJIA0588E
RJIA0492E
RJIA0589E

MTC-8
TROUBLE DIAGNOSIS
CHECKING TEMPERATURE DECREASE
1. Turn the temperature dial to full cold position.
2. Check for cold air at discharge air outlets.
If NG, go to trouble diagnosis procedure for air mix door.
If OK, continue with next check.
CHECKING TEMPERATURE INCREASE
1. Turn the temperature dial to full hot position.
2. Check for hot air at discharge air outlets.
If NG, go to trouble diagnosis procedure for MTC-18, "
Insufficient
Heating" .
If all operational check are OK (symptom can not 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
simulate driving conditions environment. If symptom appears, refer
to MTC-3, "
SYMPTOM TABLE" and perform applicable trouble
diagnosis procedures.
RJIA0590E
RJIA0591E

TROUBLE DIAGNOSIS
MTC-9
C
D
E
F
G
H
I
K
L
MA
B
MTC
Mode DoorEJS001FF
SYMPTOM: Air outlet does not change.
*1MTC-5, "Discharge Air Flow".*2MTC-7, "Operational Check".*3MTC-27, "MODE DOOR".
*4MTC-3, "
SYMPTOM TABLE".
RJIA0592E

MTC-10
TROUBLE DIAGNOSIS
Air Mix Door
EJS001FG
SYMPTOM: Air mix door does not change.
*1MTC-28, "AIR MIX DOOR".*2MTC-3, "SYMPTOM TABLE".*3MTC-7, "Operational Check".
RJIA0593E

TROUBLE DIAGNOSIS
MTC-11
C
D
E
F
G
H
I
K
L
MA
B
MTC
Intake Door Motor CircuitEJS001FH
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 auto amplifier. 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
SYMPTOM: Intake door does not change.
1. CHECK POWER SUPPLY FOR HEATER CONTROL PANEL
Disconnect heater control panel harness connector.
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-3, "
BAT-
TERY POWER SUPPLY — IGNITION SW. IN ANY POSITION" .
●If OK, check for open circuit in wiring harness. Repair or replace as necessary.
●If NG, replace fuse and check wiring harness for short circuit. Repair or replace as necessary.
2. CHECK BODY GROUND CIRCUIT FOR HEATER CONTROL PANEL
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK RECIRCULATION SWITCH CIRCUIT
OK or NG
OK >> GO TO 4.
NG >> Replace heater control panel.
RJIA0595E
Terminals
Voltage (+)
(-)
ConnectorTerminal
(Wire color)
M55 1 (BR/Y) Ground Approx. 12V
RJIA0596E
Terminals
Continuity
ConnectorTerminal
(Wire color)-
M55 5 (B) Ground Yes
RJIA0597E
Terminals
Continuity
ConnectorTerminal
(Wire color)Connector Terminal
(Wire color)
M55 1 (BR/Y) M55 5 (B) Yes
RJIA0598E

TROUBLE DIAGNOSIS
MTC-13
C
D
E
F
G
H
I
K
L
MA
B
MTC
4.CHECK POWER SUPPLY FOR INTAKE DOOR MOTOR
Reconnect heater control panel connector.
OK or NG
OK >> Replace intake door motor.
NG >> GO TO 5.
5.CHECK CIRCUIT CONTINUITY BETWEEN HEATER CONTROL PANEL AND INTAKE DOOR MOTOR
Disconnect the heater control panel connector and intake door motor
connector.
OK or NG
OK >> Replace heater control panel.
NG >> Repair harness or connector.
Terminals
Condition Voltage (+) (-)
ConnectorTerminal
(Wire color)ConnectorTerminal
(Wire color)
M48 2 (R/W) M48 1 (Y/R) REC SW: ON
Approx. 12V
M48 1 (Y/R) M48 2 (R/W) REC SW: OFF
RJIA0599E
Te r m i n a l s
Continuity Heater control panel connector Intake door motor connector
ConnectorTerminal
(Wire color)ConnectorTerminal
(Wirecolor)
M55 10 (R/W) M48 2 (R/W)
Ye s
M55 11 (Y/R) M48 1 (Y/R)
RJIA0600E

MTC-14
TROUBLE DIAGNOSIS
Blower Motor Circuit
EJS001FI
SYMPTOM: Blower motor operation is malfunctioning.
INSPECTION FLOW
*1MTC-14, "Blower Motor Circuit".*2MTC-7, "Operational Check".*3MTC-3, "SYMPTOM TABLE".
*4MTC-7, "
Operational Check".
RJIA0601E