Infiniti M45 (Y34). Manual - part 796

ELECTRICALLY CONTROLLED POWER STEERING SYSTEM

STC-9

[EPS]

C

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B

STC

7. 

CHECK SOLENOID VALVE

1.

Check solenoid valve by listening for its operation sound while
applying battery voltage to terminals 1 (LG) and 2 (B).

2.

Check resistance value between following solenoid valve termi-
nals.

OK or NG

OK

>> GO TO 8.

NG

>> Replace solenoid valve.

8. 

CHECK STEERING WHEEL TURNING FORCE

1.

Connect power steering control unit harness connector.

2.

Check steering wheel turning force. Refer to 

PS-7, "CHECKING STEERING WHEEL TURNING

TORQUE"

OK or NG

OK

>> Inspection END.

NG

>> Adjust steering gear assembly adjusting screw (

PS-13

 ) and check pump discharge pressure (

PS-

25

 ).

9. 

CHECK VEHICLE SPEED SIGNAL INPUT 

●

With rear wheels raised, rotate them by hand.

●

Check voltage between power steering control unit harness con-
nector M108 terminals 3 (PU/W) and ground.

OK or NG

OK

>> Replace power steering control unit.

NG

>> Check the following.

●

Harness for open or short between power steering control unit and combination meter.

●

Combination meter operation. Refer to 

DI-16, "Vehicle Speed Signal Inspection"

 .

●

If there is non-standard condition, repair or replace it.

1 (LG) - 2 (B)

: Approx. 4 - 6

Ω

SGIA0334E

When the wheels are rotated slowly by hand:

3 (PU/W) – 
Ground

: Reading fluctuates between 0V and 5V.

SGIA0335E

ELF1080D

STC-10

[EPS]

ELECTRICALLY CONTROLLED POWER STEERING SYSTEM

10. 

CHECK ENGINE REVOLUTION SIGNAL

1.

When engine is running at idle, change the engine speed to
approximately 2,000 rpm.

2.

Check voltage between power steering control unit harness con-
nector M108 terminal 5 (W/G) and ground.

OK or NG

OK

>> Replace power steering control unit.

NG

>> Check the following.

●

Harness for open or short between power steering control unit and ECM

●

ECM engine revolution signal inspection. Refer to 

EC-112, "SELF-DIAG RESULTS MODE"

  .

●

If there is any non-standard condition, repair or replace it.

5 (W/G) – 
Ground

Engine is running

●

Warm-up condition

●

Idle speed

Engine is running

●

Warm-up condition

●

Engine speed is 
2,000 rpm

SGIA0336E

PBIA3654J

PBIA3655J

TILT & TELESCOPIC SYSTEM

STC-11

[TILT/TELESCOPIC]

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STC

[TILT/TELESCOPIC]

TILT & TELESCOPIC SYSTEM

PFP:48805

System Description 

AGS000EY

OPERATION

Steering wheel position can be adjusted with the steering position switch.

NOTE:

●

The steering wheel position can be manually operated with the ignition switch OFF.

Component Parts and Harness Connector Location

AGS000EZ

SGIA0428E

STC-12

[TILT/TELESCOPIC]

TILT & TELESCOPIC SYSTEM

Wiring Diagram

AGS000F0

TGWA0010E