Infiniti FX35, FX50 (S51). Manual - part 1612

C1D12 SHOCK ABSORBER ACTUATOR

SCS-33

< DTC/CIRCUIT DIAGNOSIS >

C

D

F

G

H

I

J

K

L

M

A

B

SCS

N

O

P

3.

CHECK FRONT RH SHOCK ABSORBER ACTUATOR

Perform the front RH shock absorber actuator. Refer to 

SCS-33, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace the front RH shock absorber. Refer to 

FSU-27, "Exploded View"

. 

4.

PERFORM DATA MONITOR

With CONSULT-III

1.

Start the engine.

2.

Select “DATA MONITOR” of “E-SUS”.

3.

Select “FR 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:0000000005588939

1.

PERFORM ACTIVE TEST

With CONSULT-III

1.

Connect the E-SUS control unit harness connector and front RH shock absorber actuator harness con-
nector. 

2.

Select “FRONT 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 front RH wheel shock absorber. Refer to 

FSU-27, "Exploded View"

. 

FR ACTUATOR CRNT

: Approx. 0.65 – 2.0 A

Test item

Display Item

Display

Operation half cycle

SHOCK ABSORBER ACTUATOR

FRONT RIGHT ACTUATOR

0.1 seconds – 1 second (cycle in 0.1 seconds)

SCS-34

< DTC/CIRCUIT DIAGNOSIS >

C1D13 SHOCK ABSORBER ACTUATOR

C1D13 SHOCK ABSORBER ACTUATOR

Description

INFOID:0000000005588940

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:0000000005588941

DTC DETECTION LOGIC

DTC REPRODUCTION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

With CONSULT-III

1.

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

SCS-10, "CONSULT-III Function"

.

2.

Perform “E-SUS” self-diagnosis.

Is DTC “C1D13” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

SCS-34, "Diagnosis Procedure"

. 

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005588942

1.

CHECK FRONT 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 FRONT LH SHOCK ABSORBER ACTUATOR CIRCUIT (2)

1.

Disconnect the front LH shock absorber actuator harness connector. 

2.

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace the malfunction harness or connector. 

DTC

Display Item

Malfunction detected condition

Possible causes

C1D13

FL ACTUATOR SIG

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

• Harness or connector
• Malfunction of the front LH 

wheel shock absorber ac-
tuator

• E-SUS control unit

E-SUS control unit

Resistance

Connector

Terminal

B38

5

Approx. 0.65 

Ω

4

E-SUS control unit

Front LH shock absorber actuator

Continuity

Connector

Terminal

Connector

Terminal

B38

5

E85

1

Existed

4

2

C1D13 SHOCK ABSORBER ACTUATOR

SCS-35

< DTC/CIRCUIT DIAGNOSIS >

C

D

F

G

H

I

J

K

L

M

A

B

SCS

N

O

P

3.

CHECK FRONT LH SHOCK ABSORBER ACTUATOR

Perform the front LH shock absorber actuator. Refer to 

SCS-35, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace the front LH shock absorber. Refer to 

FSU-27, "Exploded View"

. 

4.

PERFORM DATA MONITOR

With CONSULT-III

1.

Start the engine.

2.

Select “DATA MONITOR” of “E-SUS”.

3.

Select “FL 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:0000000005588943

1.

PERFORM ACTIVE TEST

With CONSULT-III

1.

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

2.

Select “FRONT 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 front LH wheel shock absorber. Refer to 

FSU-27, "Exploded View"

. 

FL ACTUATOR CRNT

: Approx. 0.65 – 2.0 A

Test item

Display Item

Display

Operation half cycle

SHOCK ABSORBER ACTUATOR

FRONT LEFT ACTUATOR

0.1 seconds – 1 second (cycle in 0.1 seconds)

SCS-36

< DTC/CIRCUIT DIAGNOSIS >

C1D14 SHOCK ABSORBER ACTUATOR

C1D14 SHOCK ABSORBER ACTUATOR

Description

INFOID:0000000005588944

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:0000000005588945

DTC DETECTION LOGIC

DTC REPRODUCTION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

With CONSULT-III

1.

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

SCS-10, "CONSULT-III Function"

.

2.

Perform “E-SUS” self-diagnosis.

Is DTC “C1D14” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

SCS-36, "Diagnosis Procedure"

. 

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005588946

1.

CHECK REAR RH 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 RH SHOCK ABSORBER ACTUATOR CIRCUIT (2)

1.

Disconnect the rear RH shock absorber actuator harness connector. 

2.

Check the continuity between the E-SUS control unit harness connector and rear RH 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

C1D14

RR ACTUATOR SIG

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

• Harness or connector
• Malfunction of the rear RH 

wheel shock absorber ac-
tuator

• E-SUS control unit

E-SUS control unit

Resistance

Connector

Terminal

B38

8

Approx. 0.65 

Ω

9

E-SUS control unit

Rear RH shock absorber actuator

Continuity

Connector

Terminal

Connector

Terminal

B38

8

B57

1

Existed

9

2