fuse diagram NISSAN ALMERA N16 2003 Electronic Repair Manual

Description=NJGI0003S02
Number Item Description
1 Power conditionThis shows the condition when the system receives battery positive voltage (can be
operated).
2 Fusible linkThe double line shows that this is a fusible link.
The open circle shows current flow in, and the shaded circle shows current flow out.
3Fusible link/fuse loca-
tionThis shows the location of the fusible link or fuse in the fusible link or fusebox.For
arrangement, refer to EL-12, “POWER SUPPLY ROUTING”.
4FuseThe single line shows that this is a fuse.
The open circle shows current flow in, and the shaded circle shows current flow out.
5 Current rating This shows the current rating of the fusible link or fuse.
6 ConnectorsThis shows that connector E3 is female and connector M1 is male.
The G/R wire is located in the 1A terminal of both connectors.
Terminal number with an alphabet (1A, 5B, etc.) indicates that the connector is SMJ con-
nector. Refer to GI-20.
7 Optional splice The open circle shows that the splice is optional depending on vehicle application.
8 Splice The shaded circle shows that the splice is always on the vehicle.
9 Page crossingThis arrow shows that the circuit continues to an adjacent page.
The A will match with the A on the preceding or next page.
10 Common connectorThe dotted lines between terminals show that these terminals are part of thesamecon-
nector.
11 Option abbreviation This shows that the circuit is optional depending on vehicle application.
12 RelayThis shows an internal representation of the relay. For details, refer to EL-9, “STAN-
DARDIZED RELAY”.
13 Connectors This shows that the connector is connected to the body or a terminal with bolt or nut.
14 Wire colorThis shows a code for the color of the wire.
B=Black
W = White
R = Red
G = Green
L = Blue
Y = Yellow
LG = Light GreenBR = Brown
OR = Orange
P = Pink
PU = Purple
GY = Gray
SB = Sky Blue
CH = Dark Brown
DG=DarkGreen
When the wire color is striped, the base color is given first, followed by the stripe color as
shown below:
Example: L/W = Blue with White Stripe
15 Option description This shows a description of the option abbreviationused on the page.
16 SwitchThis shows that continuity exists between terminals 1 and 2 when the switchis in the A
position. Continuity exists between terminals 1 and 3 when the switch is inthe B posi-
tion.
17 Assembly parts Connector terminal in component shows that it is a harness incorporated assembly.
18 Cell codeThis identifies each page of the wiring diagram by section, system and wiring diagram
page number.
19 Current flow arrowArrow indicates electric current flow, especially where the direction ofstandard flow (ver-
tically downward or horizontally from left to right) is difficult to follow.
A double arrow “
” shows that current can flow in either direction depending on cir-
cuit operation.
HOW TO READ WIRING DIAGRAMS
Description
GI-14

Number Item Description
20 System branchThis shows that the system branches to another system identified by cell code (section
and system).
21 Page crossingThis arrow shows that the circuit continues to another page identified by cell code.
The C will match with the C on another page within the system other than the next or
preceding pages.
22 Shielded line The line enclosed by broken line circle shows shield wire.
23Component box in
wave lineThis shows that another part of the component is also shown on another page (indicated
by wave line) within the system.
24 Component name This shows the name of a component.
25 Connector numberThis shows the connector number.
The letter shows which harness the connector is located in.
Example:M: main harness. For detail and to locate the connector, refer to EL-556, “Main
Harness”. A coordinate grid is included for complex harnesses to aid in locating connec-
tors.
26 Ground (GND)The line spliced and grounded under wire color shows that ground line is spliced at the
grounded connector.
27 Ground (GND)This shows the ground connection. For detailed ground distribution information, refer to
EL-24, “GROUND DISTRIBUTION”.
28 Connector viewsThis area shows the connector faces of the components in the wiring diagramon the
page.
29 Common componentConnectors enclosed in broken line show that these connectors belong to thesamecom-
ponent.
30 Connector colorThis shows a code for the color of the connector. For code meaning, refer to wire color
codes, Number 14 of this chart.
31Fusible link and fuse
boxThis shows the arrangement of fusible link(s) and fuse(s), used for connector views of
“POWER SUPPLY ROUTING” in EL section.
The open square shows current flow in, and the shaded square shows current flow out.
32 Reference areaThis shows that more information on the Super Multiple Junction (SMJ), Electrical Units,
exists at the end of the manual. Refer to GI-20 for details.
MA
EM
LC
EC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
HOW TO READ WIRING DIAGRAMS
Description (Cont’d)
GI-15

manual.
Fuse block — Junction box (J/B)
Fuse block — Junction box (J/B) connector number is shown in the
Reference Area of the wiring diagram. For connector terminal and
fuse arrangement, refer to the “FUSE BLOCK — Junction Box
(J/B)” electrical reference page at the end of the manual.
Fuse and fusible link box
For fuse arrangement in the fuse and fusible link box, refer to the
“FUSE AND FUSIBLE LINK BOX” electrical reference page at the
end of the manual.
Electrical units
Electrical unit connector symbols are shown in the Connector Area
of the wiring diagram.
However, when there is not enough space to show the connector
terminal arrangement in the Connector Area of the wiring diagram,
the electrical unit connector number is shown in the Reference
Area of the wiring diagram. For electrical unit connector terminal
arrangement, refer to the “ELECTRICAL UNITS” electrical refer-
ence page at the end of the manual. Most of the electrical unit
connectors on this page are shown from the harness side of the
connector.
Joint connector
Joint connector symbols are shown in the connector area of the
wiring diagram. For connector internal wiring layout and joint con-
nector terminal arrangement, refer to the “JOINT CONNECTOR
(J/C)” electrical reference page at the end of the manual.
MA
EM
LC
EC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
HOW TO READ WIRING DIAGRAMS
Description (Cont’d)
GI-21

EC-112
[QG (WITH EURO-OBD)]
POWER SUPPLY CIRCUIT FOR ECM
3. DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors M202, F115
●Fuse block (J/B) connector M1
●10A fuse
●Harness for open or short between ECM and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals 1, 115, 116 and engine ground.
Refer to Wiring Diagram.
4. Also check harness for short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to power in harness or connectors.
5. CHECK ECM POWER SUPPLY CIRCUIT-II
1. Disconnect ECM relay.
2. Check voltage between ECM relay terminals 1 and 6 and
ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.Continuity should exist.
MBIB0247E
Voltage: Battery voltage
SEF420X

POWER SUPPLY CIRCUIT FOR ECM
EC-113
[QG (WITH EURO-OBD)]
C
D
E
F
G
H
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EC
6.DETECT MALFUNCTIONING PART
Check the following.
●10A fuse
●15A fuse
●Harness for open or short between ECM relay and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 111 and ECM relay terminal 2.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> GO TO 8.
8.DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors E225, F43
●Harness for open or short between ECM and ECM relay
>> Repair open circuit or short to ground or short to power in harness or connectors.
9.CHECK ECM RELAY
Refer to EC-115, "
Component Inspection" .
OK or NG
OK >> GO TO EC-365, "IGNITION SIGNAL" .
NG >> Replace ECM relay.
10.CHECK ECM POWER SUPPLY CIRCUIT-III
1. Stop engine and wait at least 10 seconds.
2. Turn ignition switch “ON” and then “OFF”.
3. Check voltage between ECM terminals 119, 120 and ground
with CONSULT-II or tester.
OK or NG
OK >> GO TO 14.
NG (Battery voltage does not exist.)>>GO TO 11.
NG (Battery voltage exists for more than a few seconds.)>>GO TO 12. Continuity should exist.
Voltage: After turning ignition switch “OFF”, battery
voltage will exist for a few seconds, then
drop approximately 0V.
MBIB0016E

EC-126
[QG (WITH EURO-OBD)]
DTC P0031, P0032 HO2S1 HEATER
2. DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors M182, E251
●Harness connectors E75, F36
●Fuse block (J/B) connector M1
●10A fuse
●Harness for open or short between heated oxygen sensor 1 and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
3. CHECK HO2S1 OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 24 and HO2S1 terminal 1.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK HEATED OXYGEN SENSOR 1 HEATER
Refer to EC-127, "
Component Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Replace heated oxygen sensor 1.
5. CHECK INTERMITTENT INCIDENT
Refer to EC-109, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END Continuity should exist.

EC-132
[QG (WITH EURO-OBD)]
DTC P0037, P0038 HO2S2 HEATER
2. DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors M182, E251
●Harness connectors E75, F36
●Fuse block (J/B) connector M1
●10A fuse
●Harness for open or short between heated oxygen sensor 2 and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
3. CHECK HO2S2 OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 2 and HO2S2 terminal 1.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK HEATED OXYGEN SENSOR 2 HEATER
Refer to EC-133, "
Component Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Replace heated oxygen sensor 2.
5. CHECK INTERMITTENT INCIDENT
Refer to EC-109, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END Continuity should exist.

DTC P1805 BRAKE SWITCH
EC-363
[QG (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
3.DETECT MALFUNCTIONING PART
Check the following.
●10A fuse
●Fuse block (J/B) connector M2
●Harness for open and short between stop lamp switch and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Disconnect stop lamp switch harness connector.
4. Check harness continuity between ECM terminal 101 and stop
lamp switch terminal 2.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors M202, F115
●Harness for open or short between ECM and stop lamp switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK STOP LAMP SWITCH
Refer to EC-364, "
Component Inspection" .
OK or NG
OK >> GO TO 7.
NG >> Replace stop lamp switch.
7.CHECK INTERMITTENT INCIDENT
Refer to EC-109, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END Continuity should exist.
MBIB0152E

IGNITION SIGNAL
EC-371
[QG (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
6.CHECK IGNITION COIL POWER SUPPLY CIRCUIT-III
1. Turn ignition switch “OFF”.
2. Disconnect ECM relay.
3. Check harness continuity between ECM relay terminal 7 and
condenser terminal 1.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.
7.DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors E225, F43
●Harness for open or short between ECM relay and condenser
>> Repair open circuit or short to ground or short to power in harness connectors.
8.CHECK IGNITION COIL POWER SUPPLY CIRCUIT-IV
Check voltage between ECM relay terminal 6 and ground with CON-
SULT-II or tester.
OK or NG
OK >> GO TO 10.
NG >> GO TO 9.
9.DETECT MALFUNCTIONING PART
Check the following.
●15A fuse
●Harness for open or short between ECM relay and battery
>> Repair or replace harness or connectors.
10.CHECK ECM RELAY
Refer to EC-373, "
Component Inspection" .
OK or NG
OK >> GO TO 18.
NG >> Replace ECM relay.Continuity should exist.
MBIB0247E
Voltage: Battery voltage
PBIB0625E

INJECTOR CIRCUIT
EC-379
[QG (WITH EURO-OBD)]
C
D
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F
G
H
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MA
EC
3.CHECK INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect injector harness connector.
3. Turn ignition switch “ON”.
4. Check voltage between injector terminal 1 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors M202, F115
●Fuse block (J/B) connector M1
●10A fuse
●Harness for open or short between injector and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between injector terminal 2 and ECM terminals 22, 23, 41, 42.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK INJECTOR
Refer to EC-380, "
Component Inspection" .
OK or NG
OK >> GO TO 7.
NG >> Replace injector.
MBIB0101E
Voltage: Battery voltage
PBIB0582E
Continuity should exist.