2008 NISSAN LATIO battery

TROUBLE DIAGNOSIS
MTC-35
< SERVICE INFORMATION >
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NG >> Check power supply circuit and 15A fuses [Nos. 15 and 17, located in the fuse block (J/B)].
Refer to PG-3, "
Schematic".
• If fuses are OK, reinstall fuses and GO TO 3.
• If fuses are NG, replace fuse and check harness for short circuit. Repair or replace if necessary.
3.CHECK BLOWER MOTOR RELAY POWER SUPPLY CIRCUITS
1. Turn ignition switch OFF.
2. Disconnect blower motor relay connector.
3. Turn ignition switch ON.
4. Check voltage between blower motor relay harness connector J-
1 terminal 1, 5 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4.CHECK BLOWER MOTOR RELAY (SWITCH SIDE) CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Check continuity between blower motor relay harness connector
J-1 (A) terminal 3 and front blower motor harness connector
M62 (B) terminal 1.
OK or NG
OK >> GO TO 5.
NG >> Repair harness or connector.
5.CHECK BLOWER MOTOR RELAY GROUND CIRCUIT
Check continuity between blower motor relay harness connector J-1
terminal 2 and ground.
OK or NG
OK >> Replace blower motor relay.
NG >> Repair harness or connector.
6.CHECK FRONT BLOWER MOTOR
Check continuity between front blower motor terminals 1 and 2.
NOTE:
Ensure that there are no foreign particles inside the A/C unit assem-
bly for a smooth rotation of the front blower motor.
OK or NG
OK >> GO TO 7.
NG >> Replace front blower motor. Refer to MTC-62, "
Removal
and Installation".
7.CHECK CIRCUIT CONTINUITY BETWEEN FRONT BLOWER MOTOR AND FRONT AIR CONTROL 1 - Ground Battery voltage should exist.
5 - Ground Battery voltage should exist.
WJIA1783E
Continuity should exist.
WJIA2263E
Continuity should exist.
WJIA2264E
1 - 2 : Continuity should exist.
WJIA2230E

MTC-38
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
Perform diagnostic procedure for the magnetic clutch. Refer to "DIAGNOSTIC PROCEDURE FOR MAGNET
CLUTCH".
OK or NG
OK >> If the symptom still exists, perform a complete operational check. Refer to MTC-30, "Operational
Check". If other symptoms exist, refer to MTC-22, "How to Perform Trouble Diagnosis for Quick
and Accurate Repair".
NG >> Repair as necessary.
SYSTEM DESCRIPTION
Thermo control amp. controls A/C compressor operation by intake air temperature and signal from ECM.
The defrost A/C switch controls A/C compressor operation by the BCM when the mode switch is turned to the
(DEF) position.
Low Temperature Protection Control
When intake air temperatures are higher than 4°C (39°F), the com-
pressor turns ON. The compressor turns OFF when intake air tem-
peratures are lower than 2°C (36°F).
DIAGNOSTIC PROCEDURE FOR MAGNET CLUTCH
SYMPTOM: Magnet clutch does not engage in A/C, defrost/foot, or defrost mode.
1.PERFORM AUTO ACTIVE TEST
Refer to PG-19, "
Auto Active Test".
Does the magnet clutch operate?
YES >> GO TO 5.
NO >> Check 10A fuse (No. 42, located in the IPDM E/R). Refer to PG-22, "
IPDM E/R Terminal
Arrangement".
• If fuse is OK, GO TO 2.
• If fuse is NG, replace fuse and check harness for short circuit. Repair or replace if necessary.
2.CHECK POWER SUPPLY FOR IPDM E/R
Check power supply to 10A fuse (No. 42 located in the IPDM E/R).
SJIA0741E
WJIA2250E
:Battery voltage should exist

TROUBLE DIAGNOSIS
MTC-39
< SERVICE INFORMATION >
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OK or NG
OK >> GO TO 3.
NG >> Check harness for open circuit. Repair or replace if necessary.
3.CHECK POWER SUPPLY FOR A/C COMPRESSOR
1. Disconnect A/C compressor connector.
2. Start the engine.
3. Turn blower control dial and A/C switch ON.
4. Check voltage between A/C compressor harness connector F3
terminal 1 and ground.
OK or NG
OK >> Replace magnet clutch. Refer to MTC-78, "Removal and
Installation of Compressor"
NG >> GO TO 4.
4.CHECK CIRCUIT CONTINUITY BETWEEN IPDM E/R AND COMPRESSOR
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between A/C compressor harness connector
F3 (A) terminal 1 and IPDM E/R harness connector E43 (B) ter-
minal 11.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-26, "Removal and
Installation of IPDM E/R"
NG >> Repair harness or connector.
5.CHECK DEFROST A/C SWITCH
1. Start the engine.
2. Turn the mode control dial to (DEF) position.
Does the magnet clutch operate
OK >> GO TO 6.
NG >> GO TO 23.
6.CHECK BCM INPUT (COMPRESSOR ON) SIGNAL
1. Turn ignition switch OFF.
2. Check compressor ON/OFF signal. Refer to MTC-22, "
CONSULT-III Function (BCM)".
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.
7.CHECK CIRCUIT CONTINUITY BETWEEN FRONT AIR CONTROL AND BCM 1 - Ground :Battery voltage
SJIA0743E
1 - 11 :Continuity should exist
WJIA2233E
A/C SW ON : AIR COND SW ON
A/C SW OFF : AIR COND SW OFF

TROUBLE DIAGNOSIS
MTC-43
< SERVICE INFORMATION >
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OK or NG
OK >> • GO TO 18 (with CVT).
• GO TO 19 (without CVT).
NG >> GO TO 21.
18.CHECK THERMO CONTROL AMP. GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between thermo control amp. harness connec-
tor M42 terminal 2 and ground.
OK or NG
OK >> Repair thermo control amp. jumper as necessary.
NG >> Repair harness or connector.
19.CHECK POWER SUPPLY FOR THERMO CONTROL AMP.
Check voltage between thermo control amp. harness connector M42
terminal 1 and ground.
OK or NG
OK >> GO TO 20.
NG >> Check power supply circuit and 10A fuse [No. 16,
located in the fuse block (JB)]. Refer to PG-72
.
• If fuse is OK, check harness for open circuit. Repair or
replace if necessary.
• If fuse is NG, replace fuse and check harness for short
circuit. Repair or replace if necessary.
20.CHECK THERMO CONTROL AMP. GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between thermo control amp. harness connec-
tor M42 terminal 2 and ground.
OK or NG
OK >> Replace thermo control amp. Refer to MTC-57.
NG >> Repair harness or connector.
21.CHECK CIRCUIT CONTINUITY BETWEEN THERMO CONTROL AMP. AND BCM
Te r m i n a l s
Vol tag e
(Approx.) (+)
(-)
Connector Terminal
Thermo control
amp.: M423Ground
ZJIA0719J
2 - Ground :Continuity should exist
SJIA0763E
1 - Ground :Battery voltage
SJIA0762E
2 - Ground :Continuity should exist
SJIA0763E

POWER SUPPLY ROUTING CIRCUIT
PG-5
< SERVICE INFORMATION >
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Wiring Diagram - POWER -INFOID:0000000001704692
BATTERY POWER SUPPLY — IGNITION SWITCH IN ANY POSITION
AWMWA0065G

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PG-23
< SERVICE INFORMATION >
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PG
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Terminal and Reference Value for IPDM E/RINFOID:0000000001704703
Te r m i n a lWire
colorSignal nameSignal
input/
outputMeasuring condition
Reference value
(Approx.) Ignition
switchOperation or condition
1 R Battery power supply Input OFF — Battery voltage
2 G Battery power supply Input OFF — Battery voltage
3YECM Relay Output—Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
4GECM relay Output—Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
6RDaytime light relay
controlInput ON Daytime light system active. Less than battery voltage
Daytime light system inactive. Battery voltage
7 G ECM relay control Input —Ignition switch ON or START 0V
Ignition switch OFF or ACC Battery voltage
8GThrottle control motor
relayOutput —Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
11 W A/C compressor OutputON or
STARTA/C switch ON or defrost A/C
switchBattery voltage
A/C switch OFF or defrost A/C
switch0V
12 OIgnition switch sup-
plied powerInput —OFF or ACC 0V
ON or START Battery voltage
14LG
(M/T)
R
(A/T
or
CVT)Fuse 49 Output —Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
15 V Fuse 50 Output —Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
16 BR Fuse 51 Output —Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
17 Y Battery power supply Output — — Battery voltage
19 R Starter motor Output START — Battery voltage
20L
(with
A/C)
LG
(with-
out A/
C)Cooling fan relay-1 Output —Conditions correct for cooling
fan low operation.Battery voltage
Conditions not correct for
cooling fan low operation.0V
22 G Battery power supply Input — — Battery voltage
23 L Cooling fan relay-2 Input —Conditions correct for cooling
fan high operationBattery voltage
Conditions not correct for
cooling fan high operation0V

PG-24
< SERVICE INFORMATION >
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
24 Y Cooling fan relay-3 Output —Conditions correct for cooling
fan high operationBattery voltage
Conditions not correct for
cooling fan high operation0V
26 OTail lamp relay (park-
ing lamps)Output — Lighting switch in 2nd position Battery voltage
27 BRTail lamp relay (park-
ing lamps)Output — Lighting switch in 2nd position Battery voltage
28 GRTail lamp relay (park-
ing lamps)Output — Lighting switch in 2nd position Battery voltage
29 PTail lamp relay (park-
ing lamps)Output — Lighting switch in 2nd position Battery voltage
30
(A/T
only)R Fuse 54 Output —Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
31 O Fuse 55 Output —Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
32 LWiper high speed sig-
nalOutputON or
STARTWiper switchOFF, LO, INT 0V
HI Battery voltage
33 YWiper low speed sig-
nalOutputON or
STARTWiper switchOFF 0V
LO or INT Battery voltage
35 BRStarter relay (inhibit
switch)InputON or
STARTSelector lever in "P" or "N"
(CVT or A/T) or clutch pedal
depressed (M/T)Battery voltage
Selector lever any other posi-
tion (CVT or A/T) or clutch
pedal released (M/T)0V
36 BR Fuel pump relay Output —Ignition switch ON or START Battery voltage
Ignition switch OFF or ACC 0V
37 G Oil pressure switch InputON or
STARTEngine running and oil pres-
sure within specificationBattery voltage
Engine not running or oil pres-
sure below specification0V
38 R Wiper auto stop signal InputON or
STARTWipers not in park position Battery voltage
Wipers in park position 0V
39 B Ground Input — — 0V
40 P CAN-L — ON — —
41 L CAN-H — ON — —
45 R Horn relay control Input —Horn switch PUSHED, alarm
switch activated or door lock/
unlock is confirmed when op-
erating lock system via the
keyfob0V
Horn switch released, alarm
not active, keyfob not activeBattery voltage
46 YThrottle control motor
relay controlInput —Ignition switch ON or START 0V
Ignition switch OFF or ACC Battery voltage
47 GRFuel pump relay con-
trolInput —
Ignition switch ON or START 0V
Ignition switch OFF or ACC Battery voltage Te r m i n a lWire
colorSignal nameSignal
input/
outputMeasuring condition
Reference value
(Approx.) Ignition
switchOperation or condition

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PG-25
< SERVICE INFORMATION >
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PIPDM E/R Power/Ground Circuit InspectionINFOID:0000000001704704
1.FUSE AND FUSIBLE LINK INSPECTION
Check that the following fusible links or IPDM E/R fuses are not blown.
OK or NG
OK >> GO TO 2.
NG >> Replace fuse or fusible link.
2.POWER CIRCUIT INSPECTION
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E42.
3. Check voltage between IPDM E/R harness connector E42 terminals 1, 2 and ground.
50 V Front fog lamp (LH)Output ON or
STARTLighting
switch must
be in the 2ND
position
(LOW beam
is ON) and
the front fog
lamp switchOFF 0V
ON Battery voltage
51 W Front fog lamp (RH) OutputON or
STARTLighting
switch must
be in the 2ND
position
(LOW beam
is ON) and
the front fog
lamp switchOFF 0V
ON Battery voltage
52 LLH Low beam head-
lampOutput — Lighting switch in 2nd position Battery voltage
54 PRH Low beam head-
lampOutput — Lighting switch in 2nd position Battery voltage
55 GLH High beam head-
lampOutput —Lighting switch in 2nd position
and placed in HIGH or PASS
positionBattery voltage
56 YRH High beam head-
lampOutput —Lighting switch in 2nd position
and placed in HIGH or PASS
positionBattery voltage
59 B Ground Input — — 0V
60 RRear window defogger
relayOutputON or
STARTRear defogger Switch ON Battery voltage
Rear defogger Switch OFF 0V Te r m i n a lWire
colorSignal nameSignal
input/
outputMeasuring condition
Reference value
(Approx.) Ignition
switchOperation or condition
Terminal No. Signal name Fuse, fusible link No.
1, 2 Battery power a, b, d