Nissan Primera P11. Manual — part 194
Wiring Diagram
NCEC0440
YEC282
BATTERY
Refer to EL-POWER.
: Detectable line for DTC
: Non-detectable line for DTC
FUSE
BLOCK
(J/B)
IGNITION
SWITCH
REFER TO THE FOLLOWING
FUSE BLOCK - Junction Box (J/B)
FUSE BLOCK - Junction Box (J/B)
OFF
ACC
ON
ST
START SIGNAL
QG16
I
18DE
Wiring Diagram
EC-333
Diagnostic Procedure
=NCEC0443
1
INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes
©
GO TO 2.
No
©
GO TO 3.
2
CHECK OVERALL FUNCTION
With CONSULT-II
1. Turn ignition switch “ON”.
2. Check “START SIGNAL” in “DATA MONITOR” mode with CONSULT-II under the following conditions.
PEF111P
MTBL0140
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 4.
Condition
“START SIGNAL”
IGN “ON”
OFF
IGN “START”
ON
START SIGNAL
QG16
I
18DE
Diagnostic Procedure
EC-334
3
CHECK OVERALL FUNCTION
Without CONSULT-II
1. Turn ignition switch to “START”.
2. Check voltage between ECM terminal 41 and ground under the following conditions.
SEF142X
MTBL0143
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 4.
4
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors M50, F104
I
10A fuse
I
Harness for open or short between ECM and ignition switch
OK or NG
OK
©
GO TO 5.
NG
©
Repair open circuit or short to ground or short to power in harness or connectors.
5
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-QG-102.
©
INSPECTION END
Condition
Voltage
Ignition switch “START”
Battery voltage
Except above
Approximately 0V
START SIGNAL
QG16
I
18DE
Diagnostic Procedure (Cont’d)
EC-335
System Description
NCEC0444
Sensor
Input Signal to ECM
ECM func-
tion
Actuator
Camshaft position sensor (PHASE)
Engine speed
Fuel pump
control
Fuel pump relay
Ignition switch
Start signal
The ECM activates the fuel pump for several seconds after the ignition switch is turned on to improve engine
startability. If the ECM receives a 180° signal from the camshaft position sensor, it knows that the engine is
rotating, and causes the pump to perform. If the 180° signal is not received when the ignition switch is on, the
engine stalls. The ECM stops pump operation and prevents battery discharging, thereby improving safety. The
ECM does not directly drive the fuel pump. It controls the ON/OFF fuel pump relay, which in turn controls the
fuel pump.
Condition
Fuel pump operation
Ignition switch is turned to ON.
Operates for 1 second
Engine running and cranking
Operates
When engine is stopped (Signal is not sent from camshaft position sensor.)
Stops in 1.5 seconds
Except as shown above
Stops
Component Description
NCEC0501
A turbine type design fuel pump is used in the fuel tank.
CONSULT-II Reference Value in Data Monitor
Mode
NCEC0445
MONITOR ITEM
CONDITION
SPECIFICATION
FUEL PUMP RLY
I
Ignition switch is turned to ON (Operates for 1 second)
I
Engine running and cranking
I
When engine is stopped (stops in 1.5 seconds)
ON
I
Except as shown above
OFF
AEC801
FUEL PUMP
QG16
I
18DE
System Description
EC-336
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