Infiniti FX35, FX50 (S51). Manual - part 373

CCS-312

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

U0428 STRG SEN CAN 2

Adjust the laser beam aiming of the ICC sensor integrated unit. Refer to 

CCS-13, "LASER BEAM AIMING

ADJUSTMENT : Description"

. 

>> GO TO 2.

2.

CHECK DCA SYSTEM

1.

Erase the “self-diagnosis results”, and then perform “All DTC Reading” again after performing the action
test. (Refer to 

CCS-191, "ACTION TEST : Description"

 for action test.)

2.

Check that the DCA system is normal. 

>> WORK END

CCS

U1000 CAN COMM CIRCUIT

CCS-313

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

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U1000 CAN COMM CIRCUIT

ICC SENSOR INTEGRATED UNIT

ICC SENSOR INTEGRATED UNIT : Description

INFOID:0000000005501969

CAN COMMUNICATION

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicle is equipped with many electronic control units, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with 2 communication lines (CAN-H, CAN-L) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads the required data only.
CAN communication signal chart. Refer to 

LAN-30, "CAN Communication Signal Chart"

.

ITS COMMUNICATION

• ITS communication is a multiplex communication system. This enables the system to transmit and receive

large quantities of data at high speed by connecting ICC sensor integrated unit, brake booster control unit,
and accelerator pedal actuator with 2 communication lines.

• ITS communication lines adopt twisted-pair line style (two lines twisted) for noise immunity.

ICC SENSOR INTEGRATED UNIT : DTC Logic

INFOID:0000000005501970

DTC DETECTION LOGIC

NOTE:
If “U1000” is detected, first diagnose the CAN communication system. 

ICC SENSOR INTEGRATED UNIT : Diagnosis Procedure

INFOID:0000000005501971

1.

PERFORM THE SELF-DIAGNOSIS

1.

Turn the ignition switch ON.

2.

Turn the DCA system ON, and wait for 30 seconds or more. 

3.

Perform “All DTC Reading” with CONSULT-III. 

4.

Check if the “U1000” is detected as the current malfunction in self-diagnosis results of “ICC”. 

Is “U1000” detected as the current malfunction?

YES

>> Refer to 

LAN-20, "Trouble Diagnosis Flow Chart"

. 

NO

>> Refer to 

GI-36, "Intermittent Incident"

. 

ICC SENSOR INTEGRATED UNIT : Special Repair Requirement

INFOID:0000000005501972

DESCRIPTION

Perform the action test after adjusting the laser beam aiming of ICC sensor integrated unit when the following
operation is performed. 
• Removal and installation of ICC sensor integrated unit
• Replacement of ICC sensor integrated unit
Check the operation after performing the accelerator pedal released position learning when the following oper-
ation is performed. 
• Disconnection and connection of accelerator pedal position sensor connector
• Replace accelerator pedal assembly

SPECIAL REPAIR REQUIREMENT

1.

CHECK CONTROL UNIT REPLACED, REMOVED AND/OR INSTALLED

DTC

(On board 

display)

Trouble diagnosis name

DTC detecting condition

Possible causes

U1000

(100)

CAN COMM CIRCUIT

If ICC sensor integrated unit is not transmitting or 
receiving CAN communication signal or ITS com-
munication signal for 2 seconds or more

• CAN communication system
• ITS communication system

CCS-314

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

U1000 CAN COMM CIRCUIT

Perform the adjustment work after the replacement or removal and installation of ICC sensor integrated unit,
replacement of accelerator pedal assembly, or disconnection or connection of accelerator pedal position sen-
sor connector. 

Which is replaced, removed or installed?

ICC sensor integrated unit>>GO TO 2.
Accelerator pedal assembly>>GO TO 3.

2.

LASER BEAM AIMING ADJUSTMENT OF ICC SENSOR INTEGRATED UNIT

Adjust the laser beam aiming of the ICC sensor integrated unit. Refer to 

CCS-13, "LASER BEAM AIMING

ADJUSTMENT : Description"

. 

>> GO TO 4.

3.

ACCELERATOR PEDAL RELEASED POSITION LEARNING

Perform the Accelerator Pedal Released Position Learning. Refer to 

EC-25, "ACCELERATOR PEDAL

RELEASED POSITION LEARNING : Description"

 (VQ35HR) or 

EC-581, "ACCELERATOR PEDAL

RELEASED POSITION LEARNING : Description"

 (VK50VE). 

>> GO TO 4.

4.

CHECK DCA SYSTEM

1.

Erase the self-diagnosis results, and then perform “All DTC Reading” again after performing the action
test. (Refer to 

CCS-191, "ACTION TEST : Description"

 for action test.)

2.

Check that the DCA system is normal. 

>> WORK END

ACCELERATOR PEDAL ACTUATOR

ACCELERATOR PEDAL ACTUATOR : Description

INFOID:0000000005501973

• ITS communication is a multiplex communication system. This enables the system to transmit and receive

large quantities of data at high speed by connecting ICC sensor integrated unit, brake booster control unit,
and accelerator pedal actuator with 2 communication lines.

• ITS communication lines adopt twisted-pair line style (two lines twisted) for noise immunity.

CAUTION:

ITS communication uses the twisted pair line. Be careful when repairing the wiring. 

ACCELERATOR PEDAL ACTUATOR : DTC Logic

INFOID:0000000005501974

DTC DETECTION LOGIC

ACCELERATOR PEDAL ACTUATOR : Diagnosis Procedure

INFOID:0000000005501975

1.

PERFORM THE SELF-DIAGNOSIS

1.

Turn ignition switch ON.

2.

Turn the DCA system ON, and wait for 2 seconds or more. 

3.

Perform “All DTC Reading” with CONSULT-III. 

4.

Check if the “U1000” is detected as the current malfunction in self-diagnosis results of “ACCELE PEDAL
ACT”. 

 Is “U1000” detected as the current malfunction?

DTC

Trouble diagnosis name

DTC detecting condition

Possible causes

U1000

CAN COMM CIRCUIT

If accelerator pedal actuator is not transmitting or 
receiving ITS communication signal for 2 sec-
onds or more.

ITS communication system

CCS

U1000 CAN COMM CIRCUIT

CCS-315

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

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YES

>> Refer to 

LAN-20, "Trouble Diagnosis Flow Chart"

. 

NO

>> Refer to 

GI-36, "Intermittent Incident"

. 

ACCELERATOR PEDAL ACTUATOR : Special Repair Requirement

INFOID:0000000005501976

DESCRIPTION

Perform the action test after adjusting the laser beam aiming of ICC sensor integrated unit when the following
operation is performed. 
• Removal and installation of ICC sensor integrated unit
• Replacement of ICC sensor integrated unit
Check the operation after performing the accelerator pedal released position learning when the following oper-
ation is performed. 
• Disconnection and connection of accelerator pedal position sensor connector
• Replace accelerator pedal assembly

SPECIAL REPAIR REQUIREMENT

1.

CHECK CONTROL UNIT REPLACED, REMOVED AND/OR INSTALLED

Perform the adjustment work after the replacement or removal and installation of ICC sensor integrated unit,
replacement of accelerator pedal assembly, or disconnection or connection of accelerator pedal position sen-
sor connector. 

Which is replaced, removed or installed?

ICC sensor integrated unit>>GO TO 2.
Accelerator pedal assembly>>GO TO 3.

2.

LASER BEAM AIMING ADJUSTMENT OF ICC SENSOR INTEGRATED UNIT

Adjust the laser beam aiming of the ICC sensor integrated unit. Refer to 

CCS-13, "LASER BEAM AIMING

ADJUSTMENT : Description"

. 

>> GO TO 4.

3.

ACCELERATOR PEDAL RELEASED POSITION LEARNING

Perform the Accelerator Pedal Released Position Learning. Refer to 

EC-25, "ACCELERATOR PEDAL

RELEASED POSITION LEARNING : Description"

 (VQ35HR) or 

EC-581, "ACCELERATOR PEDAL

RELEASED POSITION LEARNING : Description"

 (VK50VE). 

>> GO TO 4.

4.

CHECK DCA SYSTEM

1.

Erase the self-diagnosis results, and then perform “All DTC Reading” again after performing the action
test. (Refer to 

CCS-191, "ACTION TEST : Description"

 for action test.)

2.

Check that the DCA system is normal. 

>> WORK END