NISSAN ALMERA N16 2003 Electronic Repair Manual

TROUBLE DIAGNOSIS
ATC-101
C
D
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F
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H
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K
L
MA
B
AT C
2.CHECK AMBIENT SENSOR CIRCUIT BETWEEN AMBIENT SENSOR AND AUTO AMP.
Disconnect auto amp. harness connector.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3.CHECK AMBIENT SENSOR
Refer to ATC-102, "
Ambient Sensor"
OK or NG
OK >> 1. Replace auto amp.
2. Go to AT C - 4 3 , "
FUNCTION CONFIRMATION PROCEDURE" perform self-diagnosis STEP-2.
Confirm that code No. 20 is displayed.
NG >> Replace ambient sensor.
4.CHECK AMBIENT SENSOR CIRCUIT BETWEEN AMBIENT SENSOR AND AUTO AMP.
Disconnect auto amp. harness connector.
OK or NG
OK >> 1. Replace auto amp.
2. Go to AT C - 4 3 , "
FUNCTION CONFIRMATION PRO-
CEDURE" and perform self-diagnosis STEP-2. Con-
firm that code No. 20 is displayed.
NG >> Repair harness or connector.
Te r m i n a l
Continuity (+) (-)
Ambient sen-
sor connectorTerminal No.
(Wire color)Auto amp.
connectorTerminal No.
(Wire color)
E219 2 (B/Y) M204 11 (B/Y) Yes
RJIA0808E
Terminal
Continuity (+) (-)
Ambient sen-
sor connectorTerminal No.
(Wire color)Auto amp.
connectorTerminal No.
(Wire color)
E219 1 (W/G) M204 2 (W/G) Yes
RJIA0809E

ATC-102
TROUBLE DIAGNOSIS
COMPONENT INSPECTION
Ambient Sensor
After disconnecting ambient sensor harness connector, measure
resistance between terminals 2 and 1 at sensor harness side, using
the table below.
If NG, replace ambient sensor.
In-vehicle Sensor CircuitEJS001ZW
COMPONENT DESCRIPTION
In-vehicle sensor
The in-vehicle sensor is located on instrument lower panel. It con-
verts variations in temperature of compartment air drawn from the
aspirator into a resistance value. It is then input into the auto ampli-
fier.
Aspirator
The aspirator is located on heater & cooling unit. It produces vacuum
pressure due to air discharged from the heater & cooling unit, contin-
uously taking compartment air in the aspirator.
Temperature °C (°F) Resistance kΩ
−15 (5) 12.73
−10 (14) 9.92
−5 (23) 7.80
0 (32) 6.19
5 (41) 4.95
10 (50) 3.99
15 (59) 3.24
20 (68) 2.65
25 (77) 2.19
30 (86) 1.81
35 (95) 1.51
40 (104) 1.27
45 (113) 1.07
RJIA1713E
RJIA1714E
RHA650H

TROUBLE DIAGNOSIS
ATC-103
C
D
E
F
G
H
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K
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MA
B
AT C
DIAGNOSTIC PROCEDURE FOR IN-VEHICLE SENSOR
SYMPTOM: In-vehicle sensor circuit is open or shorted. (22 or −22 is
indicated on auto amp. as a result of conducting Self-diagnosis
STEP 2.)
1.CHECK IN-VEHICLE SENSOR CIRCUIT BETWEEN IN-VEHICLE SENSOR AND GROUND
Disconnect in-vehicle sensor harness connector.
OK or NG
OK >> GO TO 2.
NG >> GO TO 4.
2.CHECK IN-VEHICLE SENSOR CIRCUIT BETWEEN IN-VEHICLE SENSOR AND AUTO AMP.
Disconnect auto amp. harness connector.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
RHA482A
RHA056GB
Terminal
Voltag e (+)
(-)
In-vehicle sensor
connectorTe r m i n a l N o .
(Wire color)
M205 1 (OR/L) Ground Approx. 5V
RJIA0559E
Terminal
Continuity (+) (-)
In-vehicle
sensor con-
nectorTe r m i n a l N o .
(Wire color)Auto amp.
connectorTe r m i n a l N o .
(Wire color)
M205 2 (B/Y) M204 11 (B/Y) Yes
RJIA0812E

ATC-104
TROUBLE DIAGNOSIS
3. CHECK IN-VEHICLE SENSOR
Refer to ATC-104, "
In-vehicle Sensor" .
OK or NG
OK >> 1. Replace auto amp.
2. Go to AT C - 4 3 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-diagnosis
STEP-2. Confirm that code No. 20 is displayed.
NG >> 1. Replace in-vehicle sensor.
2. Go to AT C - 4 3 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-diagnosis
STEP-2. Confirm that code No. 20 is displayed.
4. CHECK IN-VEHICLE SENSOR CIRCUIT BETWEEN IN-VEHICLE SENSOR AND AUTO AMP.
Disconnect auto amp. harness connector.
OK or NG
OK >> 1. Replace auto amp.
2. Go to AT C - 4 3 , "
FUNCTION CONFIRMATION PRO-
CEDURE" and perform self-diagnosis STEP-2. Confirm that code No. 20 is displayed.
NG >> Repair harness or connector.
COMPONENT INSPECTION
In-vehicle Sensor
After disconnecting in-vehicle sensor harness connector, measure
resistance between terminals 1 and 2 at sensor harness side, using
the table below.
If NG, replace in-vehicle sensor.
Terminal
Continuity (+) (-)
In-vehicle
sensor con-
nectorTerminal No.
(Wire color)Auto amp.
connectorTe r m i n a l N o .
(Wire color)
M205 1 (OR/L) M204 3 (OR/L) Yes
RJIA0813E
Temperature °C (°F) Resistance kΩ
−15 (5) 12.73
−10 (14) 9.92
−5 (23) 7.80
0 (32) 6.19
5 (41) 4.95
10 (50) 3.99
15 (59) 3.24
20 (68) 2.65
25 (77) 2.19
30 (86) 1.81
35 (95) 1.51
40 (104) 1.27
45 (113) 1.07
RJIA1715E

TROUBLE DIAGNOSIS
ATC-105
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D
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F
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MA
B
AT C
Sunload Sensor CircuitEJS001ZX
COMPONENT DESCRIPTION
The sunload sensor is located on the defroster grille. It detects sun-
load entering through windshield by means of a photo diode. The
sensor converts the sunload into a current value which is then input
into the auto amplifier.
SUNLOAD INPUT PROCESS
The auto amp. also includes a processing circuit which averages the variations in detected sunload over a
period of time. This prevents drastic swings in the A/C system operation due to small or quick variations in
detected sunload.
For example, consider driving along a road bordered by an occasional group of large trees. The sunload
detected by the sunload sensor will vary whenever the trees obstruct the sunlight. The processing circuit aver-
ages the detected sunload over a period of time, so that the (insignificant) effect of the trees momentarily
obstructing the sunlight does not cause any change in the A/C system operation. On the other hand, shortly
after entering a long tunnel, the system will recognize the change in sunload, and the system will react accord-
ingly.
DIAGNOSTIC PROCEDURE FOR SUNLOAD SENSOR
SYMPTOM: Sunload sensor circuit is open or shorted. (25 or −25) is
indicated on auto amp. as a result of conducting Self-diagnosis
STEP 2.)
1.CHECK SUNLOAD SENSOR CIRCUIT BETWEEN SUNLOAD SENSOR AND GROUND
Disconnect sunload sensor harness connector.
OK or NG
OK >> GO TO 2.
NG >> GO TO 4.
RJIA1732E
RJIA0814E
Te r m i n a l
Voltage (+)
(-)
Sunload sensor
connectorTerminal No. (Wire
color)
M200 1 (OR) Ground Approx. 5V
RJIA0563E

ATC-106
TROUBLE DIAGNOSIS
2. CHECK SUNLOAD SENSOR CIRCUIT BETWEEN SUNLOAD SENSOR AND AUTO AMP.
Disconnect auto amp. harness connector.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK SUNLOAD SENSOR.
Refer to ATC-107, "
Sunload Sensor" .
OK or NG
OK >> 1. Replace auto amp.
2. Go to AT C - 4 3 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-diagnosis
STEP-2. Confirm that code No. 20 is displayed.
NG >> 1. Replace sunload sensor.
2. Go to AT C - 4 3 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-diagnosis
STEP-2. Confirm that code No. 20 is displayed.
4. CHECK SUNLOAD SENSOR CIRCUIT BETWEEN SUNLOAD SENSOR AND AUTO AMP.
Disconnect auto amp. harness connector.
OK or NG
OK >> 1. Replace auto amp.
2. Go to AT C - 4 3 , "
FUNCTION CONFIRMATION PRO-
CEDURE" and perform self-diagnosis STEP-2. Con-
firm that code No. 20 is displayed.
NG >> Repair harness or connector.
Terminal
Continuity (+) (-)
Sunload sen-
sor connectorTerminal No.
(Wire color)Auto amp.
connectorTerminal No.
(Wire color)
M200 2 (B/Y) M204 11 (B/Y) Yes
RJIA0815E
Terminal
Continuity (+) (-)
Sunload sen-
sor connectorTerminal No.
(Wire color)Auto amp.
connectorTerminal No.
(Wire color)
M205 1 (OR) M204 12(OR) Yes
RJIA0816E

TROUBLE DIAGNOSIS
ATC-107
C
D
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F
G
H
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K
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MA
B
AT C
COMPONENT INSPECTION
Sunload Sensor
Measure voltage between auto amp. terminal 12 and ground.
If NG, replace auto amp.
●When checking sunload sensor, select a place where sun shines directly on it.
RJIA1733E
SHA930E

ATC-108
TROUBLE DIAGNOSIS
Intake Sensor Circuit
EJS001ZY
COMPONENT DESCRIPTION
Intake Sensor
The intake sensor is located on the heater & cooling unit. It converts
temperature of air after it passes through the evaporator into a resis-
tance value which is then input to the auto amp.
After disconnecting intake sensor harness connector, measure resis-
tance between terminals 1 and 2 at sensor harness side, using the
table below.
If NG, replace intake sensor.
DIAGNOSTIC PROCEDURE FOR INTAKE SENSOR
SYMPTOM: Intake sensor circuit is open or shorted. (24 or −24) is
indicated on auto amp. as a result of conducting Self-diagnosis
STEP 2.
1. CHECK INTAKE SENSOR CIRCUIT BETWEEN INTAKE SENSOR AND GROUND
Disconnect intake sensor harness connector.
OK or NG
OK >> GO TO 2.
NG >> GO TO 4.
Temperature °C (°F) Resistance kΩ
−15 (5) 12.34
−10 (14) 9.62
−5 (23) 7.56
0 (32) 6.00
5 (41) 4.80
10 (50) 3.87
15 (59) 3.15
20 (68) 2.57
25 (77) 2.12
30 (86) 1.76
35 (95) 1.47
40 (104) 1.23
45 (113) 1.04
RJIA0166E
RHA056GA
Terminal
Voltag e (+)
(-)
Intake sensor
connectorTerminal No.
(Wire color)
M197 1 (OR/B) Ground Approx. 5V
RJIA0819E

TROUBLE DIAGNOSIS
ATC-109
C
D
E
F
G
H
I
K
L
MA
B
AT C
2.CHECK INTAKE SENSOR CIRCUIT BETWEEN INTAKE SENSOR AND AUTO AMP.
Disconnect auto amp. harness connector.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3.CHECK INTAKE SENSOR
Refer to ATC-108, "
Intake Sensor" .
OK or NG
OK >> 1. Replace auto amp.
2. Go to AT C - 4 3 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-diagnosis
STEP-2. Confirm that code No. 20 is displayed.
NG >> 1. Replace intake sensor.
2. Go to AT C - 4 3 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-diagnosis
STEP-2. Confirm that code No. 20 is displayed.
4.CHECK INTAKE SENSOR CIRCUIT BETWEEN INTAKE SENSOR AND AUTO AMP.
Disconnect auto amp. harness connector.
OK or NG
OK >> 1. Replace auto amp.
2. Go to AT C - 4 3 , "
FUNCTION CONFIRMATION PRO-
CEDURE" and perform self-diagnosis STEP-2. Con-
firm that code No. 20 is displayed.
NG >> Repair harness or connector.
Multiplex Communication CircuitEJS001ZZ
DIAGNOSTIC PROCEDURE FOR MULTIPLEX COMMUNICATION CIRCUIT
SYMPTOM:
●A/C system cannot be controlled.
Terminal
Continuity (+) (-)
Intake sensor
connectorTerminal No.
(Wire color)Auto amp.
connectorTe r m i n a l N o .
(Wire color)
M197 2 (B/Y) M204 11 (B/Y) Yes
RJIA0820E
Terminal
Continuity (+) (-)
Intake sensor
connector Terminal No.
(Wire color)Auto amp.
connectorTe r m i n a l N o .
(Wire color)
M197 1 (OR/B) M204 1 (OR/B) Yes
RJIA0821E
RJIA1716E

ATC-110
TROUBLE DIAGNOSIS
1. CHECK FOR AUTO AMP. OUTPUT
Confirm multiplex communication signal using an oscilloscope.
OK or NG
OK >> GO TO 2.
NG >> Replace auto amp.
Te r m i n a l
Voltage
Auto amp.
connectorTerminal No.
(Wire color)
M759 (L/W)
20 (L)
RJIA0212E
HAK0363D