Infiniti G20 (P11). Manual — part 301
Wiring Diagram
NCEC0450
TEC727
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
POWER STEERING OIL PRESSURE SWITCH
Wiring Diagram
EC-615
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.
SEF228Y
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.
POWER STEERING OIL PRESSURE SWITCH
Diagnostic Procedure
EC-616
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 terminal 2 and engine ground.
AEC760
Continuity should exist.
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 connectors.
5
CHECK INPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 46 and 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 F24, M62
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-618.
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-146.
©
INSPECTION END
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
POWER STEERING OIL PRESSURE SWITCH
Diagnostic Procedure (Cont’d)
EC-617
SEF419T
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.
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
Component Inspection
EC-618
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