Nissan Primera P11. Instruction — part 281
Diagnostic Procedure
=NCEC0454
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. Start engine.
2. Check “PW/ST SIGNAL” in “DATA MONITOR” mode with CONSULT-II under the following conditions.
PEF591I
MTBL0141
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 4.
3
CHECK OVERALL FUNCTION
Without CONSULT-II
1. Start engine.
2. Check voltage between ECM terminal 46 and ground under the following conditions.
SEF148X
MTBL0142
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 4.
Steering is in neutral position
OFF
Steering is turned
ON
Condition
Voltage
When steering wheel is turned quickly
Approximately 0V
Except above
Approximately 5V
CONNECT
POWER STEERING OIL PRESSURE SWITCH
SR20DE
Diagnostic Procedure
EC-323
Component Inspection
NCEC0455
POWER STEERING OIL PRESSURE SWITCH
NCEC0455S01
1.
Disconnect power steering oil pressure switch harness con-
nector then start engine.
2.
Check continuity between terminals 1 and 2.
Refer to wiring diagram.
Conditions
Continuity
Steering wheel is being turned
Yes
Steering wheel is not being turned
No
If NG, replace power steering oil pressure switch.
4
CHECK GROUND CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect power steering oil pressure switch harness connector.
3. Check harness continuity between power steering oil pressure switch harness terminal 2 and engine ground.
Refer to wiring diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
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 INPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 46 and power steering oil pressure switch harness terminal 1.
Refer to wiring diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 7.
NG
©
GO TO 6.
6
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors F4, E42
I
Harness for open or short between ECM and power steering oil pressure switch
©
Repair open circuit or short to ground or short to power in harness or connectors.
7
CHECK POWER STEERING OIL PRESSURE SWITCH
Refer to “Component Inspection”, EC-SR-324.
OK or NG
OK
©
GO TO 8.
NG
©
Replace power steering oil pressure switch.
8
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-SR-114.
©
INSPECTION END
POWER STEERING OIL PRESSURE SWITCH
SR20DE
Component Inspection
EC-324
CONSULT-II Reference Value in Data Monitor
Mode
NCEC0548
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
LOAD SIGNAL
I
Engine: running
Rear window defogger or head-
lamp “ON”
ON
Except the above
OFF
HEATER FAN SW
I
Ignition switch: ON
Heater fan switch: ON
ON
Heater fan switch: OFF
OFF
ECM Terminals and Reference Value
NCEC0549
Specification data are reference values and are measured between each terminal and 48 (ECM ground).
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
50
R
Electric load signal
[Engine is running]
I
Headlamp switch or rear window defogger switch
is “ON”
BATTERY VOLTAGE
(11 - 14V)
51
LG/B
Blower fan SW
[Ignition switch “ON”]
I
Blower fan switch is “ON”
Approximately 0V
[Ignition switch “ON”]
I
Blower fan switch is “OFF”
Approximately 5V
ELECTRICAL LOAD SIGNAL
SR20DE
CONSULT-II Reference Value in Data Monitor Mode
EC-325
Wiring Diagram
NCEC0550
YEC255
ELECTRICAL LOAD SIGNAL
SR20DE
Wiring Diagram
EC-326
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