Infiniti FX35, FX50 (S51). Manual - part 1618

E-SUS CONTROL UNIT

SCS-57

< ECU DIAGNOSIS INFORMATION >

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Fail-safe

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Continuous Damping Control system

• When detecting any malfunction in each component of the system, it enters the fail-safe status. 
• The damping force is simultaneously maintained at approximately the intermediate level between the maxi-

mum and the minimum values, when entering the fail-safe status.

• Even if the switch is operated in the fail-safe status, lamp illuminates in SPORT mode or AUTO mode. 

JCEWA0170GB

SCS-58

< ECU DIAGNOSIS INFORMATION >

E-SUS CONTROL UNIT

DTC Inspection Priority Chart

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When multiple DTCs are detected simultaneously, check one by one depending on the following priority list. 

DTC Index

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Priority

Priority order item (DTC)

1

• U1000 CAN COMM CIRCUIT
• U1010 CONTROL UNIT (CAN)

2

Other than the above

DTC

Display Items

Reference

C1D01

VEHICLE SPEED SIG

SCS-12, "DTC Logic"

C1D03

ST ANGLE SPEED SIG

SCS-14, "DTC Logic"

C1D05

REQST TRQ SIG

SCS-16, "DTC Logic"

C1D07

STOP LAMP SW SIG

SCS-18, "DTC Logic"

C1D09

BRK FLD PRESS SIG

SCS-20, "DTC Logic"

C1D0B

FL WHL VER G-SEN

SCS-22, "DTC Logic"

C1D0C

FR WHL VER G-SEN

SCS-24, "DTC Logic"

C1D0D

FL BDY VER G-SEN

SCS-26, "DTC Logic"

C1D10

F VERTICAL G-SEN

SCS-28, "DTC Logic"

C1D11

R VERTICAL G-SEN

SCS-30, "DTC Logic"

C1D12

FR ACTUATOR SIG

SCS-32, "DTC Logic"

C1D13

FL ACTUATOR SIG

SCS-34, "DTC Logic"

C1D14

RR ACTUATOR SIG

SCS-36, "DTC Logic"

C1D15

RL ACTUATOR SIG

SCS-38, "DTC Logic"

C1D16

CONTROL UNIT

SCS-40, "DTC Logic"

C1D18

IGN VOLT

SCS-41, "DTC Logic"

C1D23

C/U REPRO ERROR

SCS-43, "DTC Logic"

U1000

CAN COMM CIRCUIT

SCS-44, "DTC Logic"

U1010

CONTROL UNIT (CAN)

SCS-45, "DTC Logic"

SPORT MODE INDICATOR LAMP DOES NOT TURN ON

SCS-59

< SYMPTOM DIAGNOSIS >

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SYMPTOM DIAGNOSIS

SPORT MODE INDICATOR LAMP DOES NOT TURN ON

Description

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Sport mode indicator lamp does not turns ON when mode select switch (E-SUS mode select) is operated to
SPORT mode.

Diagnosis Procedure

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1.

CHECK SPORT MODE INDICATOR LAMP

Perform the trouble diagnosis of sport mode indicator lamp. Refer to 

SCS-48, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> Check that there is no malfunction in each harness connector pin terminal or disconnection.

NO

>> Repair or replace the specific malfunctioning part.

SCS-60

< PRECAUTION >

PRECAUTIONS

PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT 
PRE-TENSIONER"

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The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.

WARNING:

• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in

the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.

• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this

Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the

ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s)
with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly
causing serious injury.

• When using air or electric power tools or hammers, always switch the ignition OFF, disconnect the

battery, and wait at least 3 minutes before performing any service.

Precautions for terminology

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The Continuous Damping Control is the trademark owned by ThyssenKrupp ZF Sachs AG. 

Precautions for diagnosis

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When disconnecting the harness connector from E-SUS control unit, disconnect it only after checking that the
lock lever on the harness connector is opened.