Infiniti FX35, FX50 (S51). Manual - part 366

CCS-284

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

C1A40 SYSTEM SWITCH CIRCUIT

2.

Check for continuity between the brake booster control unit harness connector and IBA OFF switch har-
ness connector. 

3.

Check for continuity between brake booster control unit and ground. 

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair the harnesses or connectors.

5.

CHECK IBA OFF SWITCH GROUND CIRCUIT

Check for continuity between IBA OFF switch harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair the harnesses or connectors.

6.

CHECK IBA OFF SWITCH SIGNAL

1.

Connect the brake booster control unit connector. 

2.

Turn the ignition switch ON.

3.

Check voltage between brake booster control unit harness connector and ground. 

Is the inspection result normal?

YES

>> Replace ICC sensor integrated unit. Refer to 

CCS-380, "Exploded View"

. 

NO

>> Replace the brake booster control unit. 

Component Inspection (IBA OFF Switch)

INFOID:0000000005501911

1.

CHECK IBA OFF SWITCH

Check for continuity of IBA OFF switch. 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace the IBA OFF switch. 

Brake booster control unit

IBA OFF switch

Continuity

Connector

Terminal

Connector

Terminal

B249

40

M184

7

Existed

Brake booster control unit

Ground

Continuity

Connector

Terminal

B249

40

 Not existed

IBA OFF switch

Ground

Continuity

Connector

Terminal

M184

6

Existed

Terminals

Voltage

(Approx.)

(+)

(–)

Brake booster control unit

Ground

Connector

Terminal

B249

40

Battery voltage

Terminal

Condition

Continuity

6

7

When the IBA OFF switch is pressed

Existed

When the IBA OFF switch is released

Not existed

CCS

C1A40 SYSTEM SWITCH CIRCUIT

CCS-285

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

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Special Repair Requirement

INFOID:0000000005501912

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

SPECIAL REPAIR REQUIREMENT

1.

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 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-286

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

C1F01 ACCELERATOR PEDAL ACTUATOR

C1F01 ACCELERATOR PEDAL ACTUATOR

Description

INFOID:0000000005501913

• The accelerator pedal actuator is integrated into the accelerator pedal assembly. 
• The accelerator pedal actuator consists of the control unit and motor. 

DTC Logic

INFOID:0000000005501914

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn the ignition switch OFF.

2.

Turn the ignition switch ON. 

3.

Slowly depress the accelerator pedal completely, and then release it. 

4.

Repeat step 3 several times. 

5.

Perform “All DTC Reading” with CONSULT-III. 

6.

Check if the DTC “C1F01” is detected as the current malfunction on the self-diagnosis results of “ICC” or
“ACCELE PEDAL ACT”. 

Is “C1F01” detected as the current malfunction?

YES

>> Refer to 

CCS-286, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-36, "Intermittent Incident"

. 

Diagnosis Procedure

INFOID:0000000005501915

1.

REPLACE ACCELERATOR PEDAL ASSEMBLY

Perform DTC confirmation procedure. If “C1F01” is detected as the current malfunction, replace the accelera-
tor pedal assembly. Refer to 

CCS-286, "DTC Logic"

. 

>> INSPECTION END

Special Repair Requirement

INFOID:0000000005501916

DESCRIPTION

The accelerator pedal released position learning is necessary when the following operation is performed. 
• Disconnection and connection of accelerator pedal assembly connector
• Replace accelerator pedal assembly

SPECIAL REPAIR REQUIREMENT

1.

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 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. 

DTC

(On board dis-

play)

Trouble diagnosis name

DTC detecting condition

Possible causes

C1F01

(91)

APA MOTOR MALF

If the accelerator pedal actuator motor error 
is detected

Accelerator pedal actuator integrated 
motor malfunction

CCS

C1F01 ACCELERATOR PEDAL ACTUATOR

CCS-287

< DTC/CIRCUIT DIAGNOSIS >

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>> WORK END