NISSAN X-TRAIL 2003 Electronic 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 blower motorMTC-13
.
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 Discharge Air FlowMTC-5
.
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 intake doorMTC-10
.
If OK, continue with next check.Conditions :Engine running and at
normal operating temper-
ature
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 insufficient heatingMTC-
17.
If all operational check are OK (symptom can not be duplicated), go
to Incident Simulation Tests inGI-24, "
How to Perform Efficient Diag-
nosis for an Electrical Incident"and perform tests as outlined to
simulate driving conditions environment. If symptom appears, refer
toMTC-3, "
SYMPTOM TABLE"and perform applicable trouble
diagnosis procedures.
Mode DoorEJS001FF
SYMPTOM: Air outlet does not change.
RJIA0590E
RJIA0591E

TROUBLE DIAGNOSIS
MTC-9
C
D
E
F
G
H
I
K
L
MA
B
MTC
Air Mix DoorEJS001FG
SYMPTOM: Air mix door does not change.
*1 Discharge air flowMTC-5*2 Operational checkMTC-7*3 Mode door control cableMTC-27
*4 Symptom tableMTC-3
RJIA0592E

MTC-10
TROUBLE DIAGNOSIS
Intake Door Motor Circuit
EJS001FH
SYMPTOM:
lIntake door does not change.
lIntake door motor does not operate normally.
*1 Air mix door cableMTC-28*2 Symptom tableMTC-3*3 Operational checkMTC-7
RJIA0593E

TROUBLE DIAGNOSIS
MTC-11
C
D
E
F
G
H
I
K
L
MA
B
MTC
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.
DIAGNOSTIC PROCEDURE
SYMPTOM: Intake door does not change.
*1 Intake door motor circuitMTC-10*2 Operational checkMTC-7*3 Symptom tableMTC-7
RJIA0594E
RJIA0519E
RJIA0595E

MTC-12
TROUBLE DIAGNOSIS
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). 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.CHECKBODYGROUNDCIRCUITFORHEATERCONTROLPANEL
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.
Te r m i n a l s
Vo ltag e (+)
(-)
ConnectorTerminal(Wire
color)
M55 1 (B/Y) Body ground Approx. 12V
RJIA0596E
Te r m i n a l s
Continuity
ConnectorTerminal (Wire
color)-
M55 5 (B) Ground Yes
RJIA0597E
Te r m i n a l s
Continuity
ConnectorTerminal (Wire
color)ConnectorTerminal (Wire
color)
M55 1 M55 5 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.
Blower Motor CircuitEJS001FI
SYMPTOM: Blower motor operation is malfunctioning.
Te r m i n a l s
Condition Voltage (+) (-)
ConnectorTerminal (Wire
colorConnectorTerminal (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
ConnectorTe r m i n a l
(Wire color)ConnectorTe r m i n a l
(Wirecolor)
M53 10 (R/W) M48 2 (R/W)
Ye s
M53 11 (Y/R) M48 1 (Y/R)
RJIA0600E

MTC-14
TROUBLE DIAGNOSIS
INSPECTION FLOW
DIAGNOSTIC PROCEDURE
SYMPTOM: Blower motor operation is malfunctioning.
*1 Blower motor circuitMTC-13*2 Operational checkMTC-7*3 Symptom tableMTC-3
*4 Operational checkMTC-7
RJIA0601E
RJIA0602E