Nissan Frontier D22. Instruction — part 513
POWER STEERING OIL PRESSURE SWITCH
EC-1155
[VG33E]
C
D
E
F
G
H
I
J
K
L
M
A
EC
Wiring Diagram
UBS00DQN
BBWA0500E
EC-1156
[VG33E]
POWER STEERING OIL PRESSURE SWITCH
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 the ECM terminals, such as the ground.
Diagnostic Procedure
UBS00DQO
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 CON-
SULT-II.
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 39 and ground.
OK or NG
OK
>> INSPECTION END.
NG
>> GO TO 4.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
39
GY/R
Power steering oil pressure
switch
[Engine is running]
●
Steering wheel is being turned
Approximately 0V
[Engine is running]
●
Steering wheel is not being turned
Approximately 5V
Condition
PW/ST SIGNAL
Steering is in neutral position
OFF
Steering is turned
ON
PBIB0304E
Condition
Voltage [V]
Steering is neutral position
Approx. 5
Steering is turned to full position
Approx. 0
SEF739U
POWER STEERING OIL PRESSURE SWITCH
EC-1157
[VG33E]
C
D
E
F
G
H
I
J
K
L
M
A
EC
4.
CHECK POWER STEERING OIL PRESSURE SWITCH GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect power steering oil pressure switch harness connec-
tor.
3.
Check harness continuity between power steering oil pressure
switch terminal 2 and engine ground. Refer to Wiring Diagram.
4.
Also check harness for short to power.
OK or NG
OK
>> GO TO 5.
NG
>> Repair open circuit or short to power in harness or con-
nectors.
5.
CHECK POWER STEERING OIL PRESSURE SWITCH INPUT SIGNAL CIRCUIT
1.
Disconnect ECM harness connector.
2.
Check harness continuity between ECM terminal 39 and power steering oil 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 6.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.
CHECK POWER STEERING OIL PRESSURE SWITCH
1.
Disconnect power steering oil pressure switch harness connector then start engine.
2.
Check continuity between terminals 1 and 2.
OK or NG
OK
>> GO TO 7.
NG
>> Replace power steering oil pressure switch.
7.
CHECK INTERMITTENT INCIDENT
Refer to
EC-696, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END.
Continuity should exist.
LEC521
Continuity should exist.
Conditions
Continuity
Steering wheel is being fully turned
Yes
Steering wheel is not being turned
No
SEF679W
EC-1158
[VG33E]
IACV-FICD SOLENOID VALVE
IACV-FICD SOLENOID VALVE
PFP:23781
Component Description
UBS00DQP
When the air conditioner is on, the IACV-FICD solenoid valve sup-
plies additional air to adjust to the increased load.
LEC515
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