NISSAN ALMERA N16 2003 Electronic Repair Manual

TROUBLE DIAGNOSIS
ATC-81
C
D
E
F
G
H
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K
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MA
B
AT C
17.CHECK CIRCUIT CONTINUITY BETWEEN COMBINATION METER AND AUTO AMP.
Disconnect combination meter connector and auto amp. connector.
OK or NG
OK >> GO TO 11.
NG >> Repair harness or connector.
18.CHECK CIRCUIT CONTINUITY BETWEEN COMBINATION METER AND AUTO AMP. (WITH GASO-
LINE ENGINE)
Disconnect combination meter connector and auto amp. connector.
OK or NG
OK >> GO TO 11.
NG >> Repair harness or connector.
DIAGNOSTIC PROCEDURE FOR MAGNET CLUTCH (YD ENGINE WITHOUT COMMON RAIL)
SYMPTOM: Magnet clutch does not engage when A/C switch is ON.
Terminal
Continuity (+) (-)
Combination
meter connec-
torTerminal No.
(Wire color)Auto amp.
connectorTerminal No.
(Wire color)
M171 45 (LG/B) M205 29 (LG/B) Yes
RJIA1702E
Terminal
Continuity (+) (-)
Combination
meter connec-
torTerminal No.
(Wire color)Auto amp.
connectorTerminal No.
(Wire color)
M171 39 (L/R) M205 22 (L/R) Yes
RJIA1703E
RJIA1704E

ATC-82
TROUBLE DIAGNOSIS
1. CHECK POWER SUPPLY FOR COMPRESSOR
Disconnect compressor harness connector.
OK or NG
OK >> Check magnet clutch coil.
1. If NG, replace magnet clutch. Refer to ATC-138,
"Compressor Clutch" .
2. Go to AT C - 4 3 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-diagnosis
STEP-4. Confirm that magnet clutch operation is usual.
NG >> Disconnect A/C relay. And GO TO 2.
2. CHECK CIRCUIT CONTINUITY BETWEEN A/C RELAY AND COMPRESSOR
OK or NG
OK >> Check harness for short. And GO TO 3.
NG >> Repair harness or connector.
3. CHECK POWER SUPPLY FOR A/C RELAY
Disconnect A/C relay.
OK or NG
OK >> GO TO 4.
NG >> Check power supply circuit and 10A (No.15) fuse at fuse
block. Refer to EL-11, "POWER SUPPLY ROUTING".
●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.
4. CHECK A/C RELAY AFTER DISCONNECTING IT
Refer to AT C - 8 5 , "
A/C Relay" .
OK or NG
OK >> Reconnect A/C relay. And GO TO 5.
NG >> 1. Replace A/C relay.
2. Go to AT C - 4 3 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-diagnosis
STEP-4. Confirm that magnet clutch operation is usual.
Te r m i n a l
Voltag e (+)
(-)
Compressor
connectorTerminal No.
(Wire color)
E25 1 (L/R) Ground Battery voltage
RJIA0295E
Terminal
Continuity (+) (-)
A/C relay con-
nectorTerminal No.
(Wire color)Compressor
connectorTe r m i n a l N o .
(Wire color)
E9 3 (L/R) E25 1 (L/R) Yes
RJIA0793E
Te r m i n a l
Voltage (+)
(-)
A/C relay con-
nectorTerminal No.
(Wire color)
E9 1 (L/Y)
Ground Battery voltage
E9 5 (L/Y)
RJIA0794E

TROUBLE DIAGNOSIS
ATC-83
C
D
E
F
G
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AT C
5.CHECK COIL SIDE CIRCUIT OF A/C RELAY
OK or NG
OK >> GO TO 6.
NG >> Repair harness or connector.
6.CHECK AMBIENT SENSOR
Refer to ATC-100, "
Ambient Sensor Circuit" .
OK or NG
OK >> GO TO 7.
NG >> Repair or replace the malfunctioning part(s).
7.CHECK COMPRESSOR FEED BACK SIGNAL
OK or NG
OK >> GO TO 9.
NG >> GO TO 13.
8.CHECK COMPRESSOR ON SIGNAL
OK or NG
OK >> GO TO 9.
NG >>
●If the voltage is approx. 5V when the A/C switch is
ON: Replace the auto amp.
●If the voltage is approx. 0V when the A/C switch is OFF: GO TO 10.
Terminal
Continuity (+) (-)
A/C relay
connectorTerminal No.
(Wire color)ECM connec-
torTerminal No.
(Wire color)
E9 2 (L) F58 204 (L) Yes
RJIA1705E
Terminal
Condition Voltage (+)
(-)
Auto amp.
connectorTe r m i n a l N o .
(Wire color)
M75 18 (BR/W) GroundA/C SW: ON Approx. 0V
A/C SW: OFF Approx. 5V
RJIA0796E
Terminal
Condition Voltage (+)
(-)
Auto amp.
connectorTerminal No.
(Wire color)
M205 22 (L/R) GroundA/C SW: ON Approx. 0V
A/C SW: OFF Approx. 5V
RJIA0798E

ATC-84
TROUBLE DIAGNOSIS
9. CHECK MULTIPLEX COMMUNICATION CIRCUIT
Refer to ATC-109, "
Multiplex Communication Circuit" .
OK or NG
OK >> INSPECTION END
NG >> Repair harness or connector.
10. CHECK CIRCUIT CONTINUITY BETWEEN DUAL-PRESSURE SWITCH AND AUTO AMP.
Disconnect dual-pressure switch connector and auto amp. connec-
tor.
OK or NG
OK >> GO TO 11.
NG >> Repair harness or connector.
11 . CHECK DUAL-PRESSURE SWITCH CIRCUIT
Refer to AT C - 8 5 , "
Dual-Pressure Switch (With Diesel Engine)" .
OK or NG
OK >> GO TO 12.
NG >> Repair or replace malfunctioning part(s).
12. CHECK CIRCUIT CONTINUITY BETWEEN DUAL-PRESSURE SWITCH AND ECM
Disconnect ECM connector.
OK or NG
OK >> GO TO 9.
NG >> Repair harness or connector.
13. CHECK CIRCUIT CONTINUITY BETWEEN COMPRESSOR AND AUTO AMP.
Disconnect compressor connector and auto amp. connector.
OK or NG
OK >> INSPECTION END
NG >> Repair harness or connector.
Terminal
Continuity (+) (-)
Dual-pres-
sure switch
connectorTe r m i n a l N o .
(Wire color)Auto amp.
connectorTerminal No.
(Wire color)
E51 1 (L/R) M205 22 (L/R) Yes
RJIA1699E
Terminal
Continuity (+) (-)
Dual-pres-
sure switch
connectorTe r m i n a l N o .
(Wire color)ECM connec-
torTerminal No.
(Wire color)
E51 2 (R/L) F60 403 (R/L) Yes
RJIA1706E
Terminal
Continuity (+) (-)
Compressor
connectorTe r m i n a l N o .
(Wire color)Auto amp.
connectorTerminal No.
(Wire color)
E25 1 (L/R) M75 18 (BR/W) Yes
RJIA1707E

TROUBLE DIAGNOSIS
ATC-85
C
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AT C
COMPONENT INSPECTION
A/C Relay
Check continuity between terminal Nos. 3 and 5.
If NG, replace relay.
Refrigerant Pressure Sensor (With Gasoline Engine)
The refrigerant pressure sensor is attached to the liquid tank (con-
denser).
Dual-Pressure Switch (With Diesel Engine)
Conditions Continuity
12V direct current supply between terminal Nos. 1
and 2Ye s
No current supply No
RHA638H
RHA272I
SHA315FD
Compressor: ON
KPa (bar, kg/cm2 , psi)Compressor: OFF
KPa (bar, kg/cm2 , psi)
Low-pressure side 186 (1.86, 1.9, 27) 177 (1.77, 1.8, 26)
High-pressure side 1,569 (15.7, 16, 228) 2,746 (27.5, 28, 398)
RHA282I

ATC-86
TROUBLE DIAGNOSIS
Insufficient Cooling
EJS001ZQ
SYMPTOM: Insufficient cooling
INSPECTION FLOW
*1ATC-42, "Self-diagnosis Function",
see No.1.*2ATC-63, "Air Mix Door Motor Circuit"*3ATC-90, "Test Reading (Gasoline
Engine)"
ATC-90, "Test Reading (Diesel
Engine)"
*4ATC-42, "Self-diagnosis Function",
see No.14.*5ATC-57, "LAN System Circuit"*6ATC-69, "Blower Motor Circuit"
RJIA1708E

TROUBLE DIAGNOSIS
ATC-87
C
D
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B
AT C
*7ATC-75, "Magnet Clutch Circuit"*8AT C - 8 8 , "PERFORMANCE TEST
DIAGNOSES"
*9AT C - 5 1 , "Operational Check"
*10ATC-42, "Self-diagnosis Function",
see No.5 or 7.*11 QG engine: EM-11, "Checking Drive
Belts"
YD engine: EM-11, "DRIVE BELTS"*12 QG engine (With EURO-OBD): EC-
324, "DTC P1217 ENGINE OVER
TEMPERATURE"
QG engine (Without EURO-OBD):
EC-596, "
DTC P1217 ENGINE
OVER TEMPERATURE"
YD engine: EC-130, "DTC P1217
OVER HEAT"

ATC-88
TROUBLE DIAGNOSIS
PERFORMANCE TEST DIAGNOSES
*1ATC-90, "PERFORMANCE CHART"*2ATC-90, "PERFORMANCE CHART"*3AT C - 9 2 , "TROUBLE DIAGNOSES
FOR UNUSUAL PRESSURE"
*4 ATC-63, "Air Mix Door Motor Circuit"
RHA281I

TROUBLE DIAGNOSIS
ATC-89
C
D
E
F
G
H
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L
MA
B
AT C
*1ATC-138, "Compressor Clutch"*2AT C - 6 9 , "Blower Motor Circuit"*3 QG engine: EM-11, "Checking Drive
Belts"
YD engine: EM-11, "DRIVE BELTS"
RJIA1595E

ATC-90
TROUBLE DIAGNOSIS
PERFORMANCE CHART
Test Condition
Testing must be performed as follows:
Test Reading (Gasoline Engine)
Recirculating-to-discharge Air Temperature Table
Ambient Air Temperature-to-operating Pressure Table
Test Reading (Diesel Engine)
Recirculating-to-discharge Air Temperature Table
Vehicle location Indoors or in the shade (in a well-ventilated place)
Doors Closed
Door windows Open
Hood Open
TEMP. Max. COLD
Mode switch (Ventilation) set
Intake switch (Recirculation) set
(blower) speedMax. speed set
Engine speed Idle speed
Operate the air conditioning system for 10 minutes before taking measurements.
Inside air (Recirculating air) at blower assembly inlet
Discharge air temperature at center ventilator
°C (°F) Relative humidity
%Air temperature
°C (°F)
50 - 6025 (77) 10.0 - 11.6 (50 - 53)
30 (86) 13.9 - 16.2 (57 - 61)
35 (95) 17.8 - 21.4 (64 - 71)
60 - 7025 (77) 11.6 - 13.9 (53 - 57)
30 (86) 16.2 - 18.9 (61 - 66)
35 (95) 21.4 - 24.5 (71 - 76)
Ambient air
High-pressure (Discharge side)
kPa (bar, kg/cm
2 , psi)Low-pressure (Suction side)
kPa (bar, kg/cm2 , psi) Relative humidity
%Air temperature
°C (°F)
50 - 7030 (86)980 - 1,180
(9.8 - 11.8, 9.99 - 12.04, 142 - 171)230 - 270 (2.3 - 2.7, 2.35 - 2.75, 33 - 39)
35 (95)1,180 - 1,390
(11.8 - 13.9, 12.04 - 14.18, 171 - 202)260 - 310 (2.6 - 3.1, 2.65 - 3.16, 38 - 45)
40 (104)1,400 - 1,580
(14.0 - 15.8, 14.28 - 16.12, 203 - 229)300 - 350 (3.0 - 3.5, 3.06 - 3.57, 44 - 51)
Inside air (Recirculating air) at blower assembly inlet
Discharge air temperature at center ventilator
°C (°F) Relative humidity
%Air temperature
°C (°F)
50 - 6020 (68) 6.5 - 9.0 (44 - 48)
25(77) 12 - 14 (54 - 57)
30 (86) 15.5 - 18.8 (60 - 66)
35 (95) 20.4 - 24.0 (69 - 75)