Infiniti I30 (A33). Manual — part 328
2
CHECK ELECTRONIC CONTROLLED ENGINE MOUNT POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect front or rear electronic controlled engine mount harness connector.
3. Check voltage between electronic controlled engine mount terminal 3 and ground with CONSULT-II or tester.
SEF899X
OK or NG
OK
©
GO TO 4.
NG
©
GO TO 3.
3
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors E15, F18
I
15A fuse
I
Harness for open or short between electronic controlled engine mount and battery
©
Repair harness or connectors.
4
CHECK ELECTRONIC CONTROLLED ENGINE MOUNT OUTPUT SIGNAL CIRCUIT FOR OPEN AND
SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 49 and electronic controlled engine mount terminal 1, ECM terminal
50 and electronic controlled engine mount terminal 2. 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 5.
NG
©
Repair open circuit, short to ground or short to power in harness connectors.
5
CHECK ELECTRONIC CONTROLLED ENGINE MOUNT
Visually check front and rear electronic controlled engine mount.
OK or NG
OK
©
GO TO 6.
NG
©
Replace front or rear engine mount assembly.
6
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-144.
©
INSPECTION END
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
ELECTRONIC CONTROLLED ENGINE MOUNT
Diagnostic Procedure (Cont’d)
EC-627
SEF286X
Component Description
NHEC0398
The power steering oil pressure switch is attached to the power
steering high-pressure tube and detects a power steering load.
When a power steering load is detected, it signals the ECM. The
ECM adjusts the IACV-AAC valve to increase the idle speed and
adjust for the increased load.
CONSULT-II Reference Value in Data Monitor
Mode
NHEC0399
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
PW/ST SIGNAL
I
Engine: After warming up, idle
the engine
Steering wheel in neutral position
(forward direction)
OFF
The steering wheel is fully turned.
ON
POWER STEERING OIL PRESSURE SWITCH
Component Description
EC-628
Wiring Diagram
NHEC0401
MEC765C
SEF641XB
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
POWER STEERING OIL PRESSURE SWITCH
Wiring Diagram
EC-629
Diagnostic Procedure
NHEC0402
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.
SEF054Y
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 47 and ground under the following conditions.
SEF363X
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 4.
POWER STEERING OIL PRESSURE SWITCH
Diagnostic Procedure
EC-630
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