2003 NISSAN ALMERA N16 DIAGRAM

POWER SUPPLY CIRCUIT FOR ECM
EC-115
[QG (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
15.CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-II
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 16.
NG >> Repair open circuit or short to power in harness or connectors.
16.CHECK INTERMITTENT INCIDENT
Refer to EC-109, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >>INSPECTION END
Component InspectionEBS00K46
ECM RELAY
1. Apply 12V direct current between ECM relay terminals 1 and 2.
2. Check continuity between relay terminals 3 and 5, 6 and 7.
3. If NG, replace ECM relay.Continuity should exist.
Condition Continuity
12V direct current supply between ter-
minals 1 and 2Ye s
OFF No
PBIB0077E

DTC U1000, U1001 CAN COMMUNICATION LINE
EC-117
[QG (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Wiring DiagramEBS00K4A
YEC277A

DTC P0011 IVT CONTROL
EC-121
[QG (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Diagnostic ProcedureEBS00K4G
1.CHECK CRANKSHAFT POSITION SENSOR (POS)
Refer to EC-238, "
Component Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Replace crankshaft position sensor (POS).
2.CHECK CAMSHAFT POSITION SENSOR (PHASE)
Refer to EC-244, "
Component Inspection" .
OK or NG
OK >> GO TO 3.
NG >> Replace camshaft position sensor (PHASE).
3.CHECK CAMSHAFT (INTAKE)
Check the following.
●Accumulation of debris to the signal plate of camshaft rear end
●Chipping signal plate of camshaft rear end
OK or NG
OK >> GO TO 4.
NG >> Remove debris and clean the signal plate of camshaft
rear end or replace camshaft.
4.CHECK INTERMITTENT INCIDENT
Refer to EC-109, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
For wiring diagram refer to EC-235, "
Wiring Diagram" for CKP sensor (POS) and EC-241, "Wiring Diagram"
for CMP sensor (PHASE).
>>INSPECTION END
PBIB0565E

EC-124
[QG (WITH EURO-OBD)]
DTC P0031, P0032 HO2S1 HEATER
Wiring Diagram
EBS00K4L
YEC282A

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-130
[QG (WITH EURO-OBD)]
DTC P0037, P0038 HO2S2 HEATER
Wiring Diagram
EBS00K4T
YEC284A

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.

EC-136
[QG (WITH EURO-OBD)]
DTC P0102, P0103 MAF SENSOR
Wiring Diagram
EBS00K51
YEC278A