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![NISSAN NAVARA 2005 Repair Workshop Manual TROUBLE DIAGNOSIS
ATC-83
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1.CHECK FUSES
Check 15A fuses [No. 24 and 27, (located in the fuse and fusible link box)]. For fuse layout, refer toPG-84,
"FUSE AND FUSIBLE LINK B NISSAN NAVARA 2005 Repair Workshop Manual TROUBLE DIAGNOSIS
ATC-83
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AT C
1.CHECK FUSES
Check 15A fuses [No. 24 and 27, (located in the fuse and fusible link box)]. For fuse layout, refer toPG-84,
"FUSE AND FUSIBLE LINK B](/manual-img/5/57362/w960_57362-416.png)
TROUBLE DIAGNOSIS
ATC-83
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1.CHECK FUSES
Check 15A fuses [No. 24 and 27, (located in the fuse and fusible link box)]. For fuse layout, refer toPG-84,
"FUSE AND FUSIBLE LINK BOX".
OK or NG
OK >> GO TO 2.
NG >> GO TO 10.
2.CHECK BLOWER MOTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect blower motor connector.
3. Turn ignition switch ON.
4. Turn the blower control dial to select any mode except off.
5. Check voltage between blower motor harness connector M94
terminal 2 and ground.
OK or NG
OK >> GO TO 12.
NG >> GO TO 3.
3.CHECK BLOWER MOTOR RELAY (SWITCH SIDE) POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect blower motor relay.
3. Check voltage between blower motor relay harness connector
E28 terminals 3 and 6 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4.CHECK BLOWER MOTOR RELAY
Refer toAT C - 8 6 , "
Blower Motor Relay".
OK or NG
OK >> GO TO 5.
NG >> Replace blower motor relay.
5.CHECK BLOWER MOTOR RELAY (SWITCH SIDE) CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect blower motor relay connector and blower motor con-
nector.
3. Check continuity between blower motor relay harness connector
E28 terminals 5 and 7 and blower motor harness connector M94
terminal 2.
OK or NG
OK >> GO TO 6.
NG >> Repair harness or connector.Fuses are good.
2 - Ground : Battery voltage.
MJIB0065E
3, 6 - Ground : Battery voltage.
MJIB0066E
5, 7 - 2 : Continuity should exist.
MJIB0067E
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ATC-84
TROUBLE DIAGNOSIS
6.CHECK VARIABLE BLOWER CONTROL POWER SUPPLY CIRCUIT FOR OPEN
1. Disconnect variable blower control harness connector.
2. Check continuity between blower motor relay harness connector
E28 terminals 5 and 7 and variable blower control harness con-
nector M96 terminal 1.
OK or NG
OK >> GO TO 7.
NG >> Repair harness or connector.
7.CHECK VARIABLE BLOWER CONTROL SIGNAL CIRCUIT
1. Disconnect front air control connector.
2. Check continuity between front air control harness connector
M61 terminal 32 and variable blower control harness connector
M96 terminal 2.
OK or NG
OK >> GO TO 8.
NG >> Repair harness or connector.
8.CHECK BLOWER MOTOR RELAY (COIL SIDE) POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between blower motor relay connector E28 termi-
nal 1 and ground.
OK or NG
OK >> GO TO 9.
NG >> Repair harness or connector.
9.CHECK BLOWER MOTOR RELAY (COIL SIDE) GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between blower motor relay connector E28 ter-
minal 2 and air control harness connector M61 terminal 38.
OK or NG
OK >> Replace front air control. Refer toAT C - 11 6 , "REMOVAL"
.
NG >> Repair harness or connector.5, 7 - 1 : Continuity should exist.
MJIB0068E
32 - 2 : Continuity should exist.
WJIA1263E
1 - Ground : Battery voltage.
LJIA0080E
2 - 38 : Continuity should exist.
WJIA1115E
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TROUBLE DIAGNOSIS
ATC-85
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10.REPLACE FUSES
1. Replace fuses.
2. Activate the blower motor.
3. Do fuses blow?
YES or NO
YES >> GO TO 11.
NO >> Inspection End.
11 .CHECK BLOWER MOTOR POWER SUPPLY CIRCUIT FOR SHORT
1. Turn ignition switch OFF.
2. Disconnect blower motor connector and variable blower control
connector.
3. Check continuity between variable blower control harness con-
nector M96 terminal 1 and ground.
OK or NG
OK >> GO TO 12.
NG >> Repair harness or connector.
12.CHECK VARIABLE BLOWER CONTROL SIGNAL CIRCUIT
1. Disconnect front air control connector.
2. Check continuity between front air control harness connector
M61 terminal 32 and variable blower control harness connector
M96 terminal 2.
OK or NG
OK >> Check blower motor. If OK, replace variable blower con-
trol. Refer toATC-121, "
REMOVAL".
NG >> Repair harness or connector.1 - Ground : Continuity should not exist.
WJIA1264E
32 - 2 : Continuity should exist.
WJIA1263E
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ATC-86
TROUBLE DIAGNOSIS
COMPONENT INSPECTION
Blower Motor Relay
Check continuity between terminals by supplying 12 volts and
ground to coil side terminals of relay.
Blower Motor
Confirm smooth rotation of the blower motor.
lEnsure that there are no foreign particles inside the blower unit.
lApply 12 volts to terminal + and ground to terminal - and verify
that the motor operates freely and quietly.
LJIA0068E
WJIA1265E
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TROUBLE DIAGNOSIS
ATC-87
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Magnet Clutch CircuitEJS006BQ
SYMPTOM: Magnet clutch does not engage.
INSPECTION FLOW
*1AT C - 5 7 , "Operational Check".*2ATC-55, "A/C System Self-diagnosis
Function".*3AT C - 5 6 , "
SELF-DIAGNOSIS CODE
CHART".
*4ATC-105, "
Ambient Sensor Circuit".*5ATC-114, "Intake Sensor Circuit".
MJIB0348E
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ATC-88
TROUBLE DIAGNOSIS
SYSTEM DESCRIPTION
The front air control controls compressor operation based on ambient and intake temperature and a signal
from ECM.
Low Temperature Protection Control
The front air control will turn the compressor ON or OFF as determined by a signal detected by the intake sen-
sor and the ambient sensor.
When intake air temperature is higher than the preset value, the compressor turns ON. The compressor turns
OFF when intake air temperature is lower than the preset value. That preset value is dependent on the ambi-
ent temperature, refer to the following table.
DIAGNOSTIC PROCEDURE FOR MAGNET CLUTCH
SYMPTOM: Magnet clutch does not engage when A/C switch is ON.
1.CHECK INTAKE AND AMBIENT SENSOR CIRCUITS
Check intake and ambient sensors. Refer toAT C - 5 5 , "
A/C System Self-diagnosis Function".
OK or NG
OK >> GO TO 2.
NG >>
lMalfunctioning intake sensor. Refer toAT C - 11 4 , "Intake Sensor Circuit".
lMalfunctioning ambient sensor. Refer toATC-105, "Ambient Sensor Circuit".
Ambient temperature°C(°F)Compressor ON
intake temperature°C(°F)Compressor OFF
intake temperature°C(°F)
0 (32) 5.5 (42) 5.0 (41)
10 (50) 4.5 (40) 4.5 (40)
20 (68) 2.5 (37) 2.0 (36)
30 (86) 2.0 (36) 1.5 (35)
40 (104) 2.0 (36) 1.5 (35)
50 (122) 2.0 (36) 1.5 (35)
MJIB0328E
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TROUBLE DIAGNOSIS
ATC-89
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2.PERFORM AUTO ACTIVE TEST
Refer toPG-19, "
Auto Active Test".
Does magnet clutch operate?
YES or NO
YES >>lWITH CONSULT-II
GO TO 5.
lWITHOUT CONSULT-II
GO TO 6.
NO >> Check 10A fuse (No. 42, located in IPDM E/R), and GO TO 3.
3.CHECK CIRCUIT CONTINUITY BETWEEN IPDM E/R AND COMPRESSOR
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector and compressor (magnet
clutch) connector.
3. Check continuity between IPDM E/R harness connector E12 ter-
minal 11 and compressor harness connector F20 terminal 1.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4.CHECK MAGNET CLUTCH CIRCUIT
Check for operation sound when applying battery voltage direct cur-
rent to terminal.
OK or NG
OK >> Replace IPDM E/R. Refer toPG-26, "Removal and
Installation of IPDM E/R".
NG >> Replace magnet clutch. Refer toBCS-17, "
Removal and
Installation of BCM".
5.CHECK BCM INPUT (COMPRESSOR ON) SIGNAL
Check compressor ON/OFF signal. Refer toAT C - 3 3 , "
CONSULT-II
Function (BCM)".
OK or NG
OK >> GO TO 8.
NG >> GO TO 6.
11 – 1 : Continuity should exist.
WJIA0560E
SJIA0197E
A/C SW ON : COMP ON SIG ON
A/CSWOFF :COMPONSIGOFF
WJIA0469E
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ATC-90
TROUBLE DIAGNOSIS
6.CHECK CIRCUIT CONTINUITY BETWEEN BCM AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect BCM connector and front air control connector.
3. Check continuity between BCM harness connector M42 terminal
27 and front air control harness connector M60 terminal 10.
OK or NG
OK >> GO TO 7.
NG >> Repair harness or connector.
7.CHECK VOLTAGE FOR FRONT AIR CONTROL (COMPRESSOR ON SIGNAL)
1. Reconnect BCM connector and front air control connector.
2. Turn ignition switch ON.
3. Check voltage between front air control harness connector M60
terminal 10 and ground.
OK or NG
OK >> GO TO 8.
NG-1 >> If the voltage is approx. 5V when A/C switch is ON, replace front air control. Refer toAT C - 11 6 ,
"REMOVAL".
NG-2 >> If the voltage is approx. 0V when A/C switch is OFF, replace BCM. Refer toBCS-17, "
Removal
and Installation of BCM". 27 - 10 Continuity should exist.
MJIB0070E
Terminals
ConditionVoltage
(Approx.) (+)
(-) Front air
control con-
nectorTerminal No.
M60 10 GroundA/C switch: ON 0V
A/C switch: OFF 5V
WJIA1137E