Infiniti F50. Manual - part 821
ELECTRICALLY CONTROLLED POWER STEERING SYSTEM
STC-9
[EPS]
C
D
E
F
H
I
J
K
L
M
A
B
STC
10.
POWER STEERING CONTROL UNIT GROUND INSPECTION
Check for continuity between the power steering control unit terminal
2 (B) and body ground.
Is the result OK?
OK
>> GO TO 11.
NG
>> Repair or replace harness.
11.
ENGINE REVOLUTION SIGNAL INSPECTION
Check power steering control unit terminal 5 (W/G),. Refer to
"Control Unit Inspection Table"
.
Is the result OK?
OK
>> GO TO 1.
NG
>> Check harness between ECM and control unit or ECM.
Repair or replace harness if necessary.
Control Unit Inspection Table
EGS0007Z
The standard values (voltage), measured with an analog tester in contact with control unit terminal, are shown
below:
2 (B) - Body ground
: Continuity should exist
SGIA0051E
SGIA0052E
Inspection terminal
Condition
Application
Standard
Power steering control
unit
1
Ignition switch ON
Power
Battery voltage (approx. 12V)
2
Ground
0V
3
Vehicle speed signal
When the speed is very low, the voltage fluctuates
between approximately 0V and approximately 5V
or higher.
5
Engine running
Engine revolution signal
Measure the tachometer drive signal.
Refer to
EC-99, "ECM Harness Connector Termi-
7
Solenoid valve
Normal
0 km/h ((0 MPH)
: Approx. 4.4 - 6.6V
100 km/h (62 MPH): Approx. 2.4 - 3.6V
When the fail-safe function is activated:
0 - 1,500 rpm
: Approx. 4.4 - 6.6V
1,500 - 3,000 rpm : Approx. 3.5V
3,000 rpm or more: Approx. 2.1V