Infiniti FX35, FX50 (S51). Manual - part 1613

C1D14 SHOCK ABSORBER ACTUATOR

SCS-37

< DTC/CIRCUIT DIAGNOSIS >

C

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3.

CHECK REAR RH SHOCK ABSORBER ACTUATOR

Perform the rear RH shock absorber actuator. Refer to 

SCS-37, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace the rear RH shock absorber. Refer to 

RSU-10, "Exploded View"

. 

4.

PERFORM DATA MONITOR

With CONSULT-III

1.

Start the engine.

2.

Select “DATA MONITOR” of “E-SUS”.

3.

Select “RR ACTUATOR CRNT” of “DATA MONITOR” screen. 

4.

Drive the vehicle and check whether it is within the following range. 

Is the inspection result normal?

YES

>> Check pin terminal and connection of each harness connector for damage or loose connections.

Repair or replace error-detected parts. 

NO

>> Replace E-SUS control unit. Refer to 

SCS-61, "Exploded View"

. 

Component Inspection

INFOID:0000000005588947

1.

PERFORM ACTIVE TEST

With CONSULT-III

1.

Connect the E-SUS control unit harness connector and rear RH shock absorber actuator harness connec-
tor. 

2.

Select “REAR RIGHT ACTUATOR” in “ACTIVE TEST”. 

3.

On the display, change the “Operation half cycle”, and check that the operation noise is heard from the
actuator. 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace the rear RH wheel shock absorber. Refer to 

RSU-10, "Exploded View"

. 

RR ACTUATOR CRNT

: Approx. 0.65 – 2.0 A

Test item

Display Item

Display

Operation half cycle

SHOCK ABSORBER ACTUATOR

REAR RIGHT ACTUATOR

0.1 seconds – 1 second (cycle in 0.1 seconds)

SCS-38

< DTC/CIRCUIT DIAGNOSIS >

C1D15 SHOCK ABSORBER ACTUATOR

C1D15 SHOCK ABSORBER ACTUATOR

Description

INFOID:0000000005588948

Integrated into each the shock absorbers on wheels and opens or closes the orifice by moving the solenoid
core vertically with the control current from E-SUS control unit to regulate the damping force. 

DTC Logic

INFOID:0000000005588949

DTC DETECTION LOGIC

DTC REPRODUCTION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

With CONSULT-III

1.

Start the engine and drive. Or select “E-SUS”, “REAR LEFT ACTUATOR” of “ACTIVE TEST”, and perform
the active test. Refer to 

SCS-10, "CONSULT-III Function"

.

2.

Perform “E-SUS” self-diagnosis.

Is DTC “C1D15” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

SCS-38, "Diagnosis Procedure"

. 

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005588950

1.

CHECK REAR LH SHOCK ABSORBER ACTUATOR CIRCUIT (1)

1.

Disconnect the E-SUS control unit harness connector. 

2.

Check the resistance between the E-SUS control unit harness connector. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK REAR LH SHOCK ABSORBER ACTUATOR CIRCUIT (2)

1.

Disconnect the rear LH shock absorber actuator harness connector. 

2.

Check the continuity between the E-SUS control unit harness connector and rear LH shock absorber
actuator harness connector. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace the malfunctioning harness or connector. 

DTC

Display Item

Malfunction detected condition

Possible causes

C1D15

RL ACTUATOR SIG

An open or short circuit is detected in the rear LH 
wheel shock absorber actuator. 

• Harness or connector
• Malfunction of the rear LH 

wheel shock absorber ac-
tuator

• E-SUS control unit

E-SUS control unit

Resistance

Connector

Terminal

B38

6

Approx. 0.65 

Ω

7

E-SUS control unit

Rear LH shock absorber actuator

Continuity

Connector

Terminal

Connector

Terminal

B38

6

B30

1

Existed

7

2

C1D15 SHOCK ABSORBER ACTUATOR

SCS-39

< DTC/CIRCUIT DIAGNOSIS >

C

D

F

G

H

I

J

K

L

M

A

B

SCS

N

O

P

3.

CHECK REAR LH SHOCK ABSORBER ACTUATOR

Perform the rear LH shock absorber actuator. Refer to 

SCS-39, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace the rear LH shock absorber. Refer to 

RSU-10, "Exploded View"

. 

4.

PERFORM DATA MONITOR

With CONSULT-III

1.

Start the engine.

2.

Select “DATA MONITOR” of “E-SUS”.

3.

Select “RL ACTUATOR CRNT” of “DATA MONITOR” screen. 

4.

Drive the vehicle and check whether it is within the following range. 

Is the inspection result normal?

YES

>> Check pin terminal and connection of each harness connector for damage or loose connections.

Repair or replace error-detected parts. 

NO

>> Replace E-SUS control unit. Refer to 

SCS-61, "Exploded View"

. 

Component Inspection

INFOID:0000000005588951

1.

PERFORM ACTIVE TEST

With CONSULT-III

1.

Connect the E-SUS control unit harness connector and rear LH shock absorber actuator harness connec-
tor. 

2.

Select “REAR LEFT ACTUATOR” in “ACTIVE TEST”. 

3.

On the display, change the “Operation half cycle”, and check that the operation noise is heard from the
actuator. 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace the rear LH wheel shock absorber. Refer to 

RSU-10, "Exploded View"

. 

RL ACTUATOR CRNT

: Approx. 0.65 – 2.0 A

Test item

Display Item

Display

Operation half cycle

SHOCK ABSORBER ACTUATOR

REAR LEFT ACTUATOR

0.1 seconds – 1 second (cycle in 0.1 seconds)

SCS-40

< DTC/CIRCUIT DIAGNOSIS >

C1D16 E-SUS CONTROL UNIT

C1D16 E-SUS CONTROL UNIT

Description

INFOID:0000000005588952

• Controls the shock absorber actuators on 4 wheels according to the signals from each sensors. 
• Stops the control signal to the shock absorber, when detecting any malfunction in the electrical system. The

damping force is maintained at approximately the intermediate level between the maximum and the mini-
mum values. 

DTC Logic

INFOID:0000000005588953

DTC DETECTION LOGIC

DTC REPRODUCTION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

With CONSULT-III

1.

Turn the ignition switch OFF to ON.

2.

Perform “E-SUS” self-diagnosis.

Is DTC “C1D16” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

SCS-40, "Diagnosis Procedure"

. 

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005588954

1.

PERFORM SELF-DIAGNOSIS

With CONSULT-III

1.

Turn the ignition switch OFF to ON.

2.

Perform “E-SUS” self-diagnosis and check whether DTC “C1D16” is detected. 

CAUTION:

Even when a record exists in the diagnosis history, replace E-SUS control unit. 

Is DTC “C1D16” detected?

YES

>> Replace E-SUS control unit. Refer to 

SCS-61, "Exploded View"

. 

NO

>> Check pin terminal and connection of each harness connector for damage or loose connections.

Repair or replace error-detected parts. 

DTC

Display Item

Malfunction detected condition

Possible causes

C1D16

CONTROL UNIT

A malfunction occurs inside the E-SUS control unit. 

E-SUS control unit