Nissan Primera P12. Manual — part 364
PNP SWITCH
EC-641
[YD (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
5.
CHECK INTERMITTENT INCIDENT
Refer to
EC-408, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
EC-642
[YD (WITHOUT EURO-OBD)]
PSP SWITCH
PSP SWITCH
PFP:49761
Component Description
EBS015D7
The power steering pressure switch is attached to the power steer-
ing high-pressure tube and detects a power steering load.
When a power steering load is detected, it signals the ECM. The
ECM adjusts the fuel injector pulse width to increase the idle speed
and adjust for the increased load.
CONSULT-II Reference Value in Data Monitor Mode
EBS015D8
Specification data are reference values.
ECM Terminals and Reference Value
EBS015D9
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.
MBIB1019E
MONITOR ITEM
CONDITION
SPECIFICATION
PW/ST SIGNAL
●
Engine: After warming up, idle the
engine
Steering wheel is in neutral position.
(Forward direction)
OFF
Steering wheel is turned.
ON
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA
(DC Voltage)
111
R/B
Power steering pressure
switch
[Engine is running]
●
Steering wheel is being turned
Approximately 0V
[Engine is running]
●
Steering wheel is not being turned
BATTERY VOLTAGE
(11 - 14V)
PSP SWITCH
EC-643
[YD (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
Wiring Diagram
EBS015DA
MBWA0391E
EC-644
[YD (WITHOUT EURO-OBD)]
PSP SWITCH
Diagnostic Procedure
EBS015DB
1.
CHECK OVERALL FUNCTION
With CONSULT-II
1.
Start engine.
2.
Check “PW/ST SIGNAL” in “DATA MONITOR” mode with CON-
SULT-II under the following conditions.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 2.
2.
CHECK POWER STEERING PRESSURE SWITCH GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect power steering pressure switch harness connector.
3.
Check harness continuity between power steering pressure
switch terminal 2 and ground. Refer to Wiring Diagram.
4.
Also check harness for short to power.
OK or NG
OK
>> GO TO 3.
NG
>> Repair open circuit or short to power in harness or con-
nectors.
3.
CHECK POWER STEERING PRESSURE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Disconnect ECM harness connector.
2.
Check harness continuity between ECM terminal 111 and power steering pressure switch terminal 1.
Refer to Wiring Diagram.
3.
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 POWER STEERING PRESSURE SWITCH
Refer to
EC-645, "Component Inspection"
.
OK or NG
OK
>> GO TO 5.
NG
>> Replace power steering pressure switch.
Conditions
PW/ST SIGNAL
Steering wheel is in neutral position
OFF
Steering wheel is turned
ON
PBIB0434E
Continuity should exist.
MBIB1019E
Continuity should exist.
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