Nissan Primera P11. Instruction — part 197
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.
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.
Condition
Voltage
When steering wheel is turned quickly
Approximately 0V
Except above
Approximately 5V
POWER STEERING OIL PRESSURE SWITCH
QG16
I
18DE
Diagnostic Procedure (Cont’d)
EC-345
7
CHECK POWER STEERING OIL PRESSURE SWITCH
Refer to “Component Inspection”, EC-QG-346.
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-QG-102.
©
INSPECTION END
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.
POWER STEERING OIL PRESSURE SWITCH
QG16
I
18DE
Diagnostic Procedure (Cont’d)
EC-346
JEF147Y
Description
NLEC0580
The refrigerant pressure sensor is installed at the liquid tank of the
air conditioner system. The sensor uses an electrostatic volume
pressure transducer to convert refrigerant pressure to voltage. The
voltage signal is sent to ECM, and ECM controls cooling fan sys-
tem.
SEF099X
ECM Terminals and Reference Value
NLEC0581
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM’s transistor. Use a ground other than ECM terminals, such as the ground.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
58
B
Sensor’s ground
[Engine is running]
I
Warm-up condition
I
Idle speed
Approximately 0V
74
R/L
Refrigerant pressure
sensor
[Engine is running]
I
Warm-up condition
I
Both A/C switch and blower switch are “ON”
(Compressor operates.)
1.0 - 4.0V
111
G
Sensor’s power supply
[Ignition switch “ON”]
Approximately 5V
REFRIGERANT PRESSURE SENSOR
QG16
I
18DE
Description
EC-347
Wiring Diagram
YEC790
: Detectable line for DTC
: Non-detectable line for DTC
REFRIGERANT
SENSOR
ECM
REFRIGERANT PRESSURE SENSOR
QG16
I
18DE
Wiring Diagram
EC-348
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