Infiniti FX35, FX50 (S51). Manual - part 356

CCS-244

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

C1A13 STOP LAMP RELAY

NO

>> Repair the harnesses or connectors.

18.

CHECK ICC BRAKE HOLD RELAY

1.

Connect ECM, rear combination lamp, and high-mounted stop lamp connectors and ICC brake hold relay. 

2.

Disconnect the stop lamp switch connector. 

3.

Turn ignition switch ON. 

4.

Perform “STOP LAMP” on “Active Test” of “ICC”, and then check the stop lamp for illumination. 

Is the inspection result normal?

YES

>> GO TO 19.

NO

>> Replace ICC brake hold relay. 

19.

CHECK ICC BRAKE SWITCH STANDARD VOLTAGE

1.

Turn ignition switch OFF.

2.

Connect the stop lamp switch connector. 

3.

Turn ignition switch ON.

4.

Perform “STOP LAMP” on “Active Test” of “ICC”, and then check the voltage between ICC brake switch
harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 20.

NO

>> Replace ICC brake hold relay. 

20.

PERFORM SELF-DIAGNOSIS OF ECM

1.

Connect all connectors again if the connectors are disconnected. 

2.

Turn ignition switch ON.

3.

Perform “All DTC Reading”. 

4.

Check if any DTC is detected in “Self Diagnostic Result” of “ENGINE”. Refer to 

EC-541, "DTC Index"

(VQ35HR) or 

EC-1179, "DTC Index"

 (VK50VE).

Is any DTC detected?

YES

>> Repair or replace the malfunctioning parts identified by the self-diagnosis result. 

NO

>> GO TO 21.

21.

CHECK ICC BRAKE HOLD RELAY DRIVE SIGNAL OUTPUT

1.

Select the active test item “STOP LAMP” of “ICC”. 

2.

Check that “STP LMP DRIVE” is turned ON when operating the test item. 

Is the inspection result normal?

YES

>> Replace brake booster control unit. 

NO

>> Replace the ICC sensor integrated unit. Refer to 

CCS-380, "Exploded View"

. 

Component Inspection

INFOID:0000000005501833

1.

CHECK ICC BRAKE HOLD RELAY

Terminal

Condition

Voltage

(Approx.)

(+)

(–)

ICC brake switch

Ground

Active Test 

item

“STOP LAMP”

Connector

Terminal

E114

1

Off

Battery 
voltage

On

0 V

CCS

C1A13 STOP LAMP RELAY

CCS-245

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Apply battery voltage to ICC brake hold relay terminals 1 and 2, and
then check for continuity under the following conditions. 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace ICC brake hold relay. 

Special Repair Requirement

INFOID:0000000005501834

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

Condition

Terminal

Continuity

When the battery voltage is applied

3

4

Not exist-

ed

7

6

Existed

When the battery voltage is not ap-
plied

3

4

Existed

7

6

Not exist-

ed

MBIB0063E

CCS-246

< DTC/CIRCUIT DIAGNOSIS >

[DCA]

C1A14 ECM

C1A14 ECM

Description

INFOID:0000000005501835

ECM transmits the accelerator pedal position signal, ICC brake switch signal, stop lamp switch signal, ICC
steering switch signal, etc. to ICC sensor integrated unit via CAN communication.

DTC Logic

INFOID:0000000005501836

DTC DETECTION LOGIC

NOTE:
If DTC “C1A14” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to 

CCS-313, "ICC

SENSOR INTEGRATED UNIT : DTC Logic"

. 

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Operate the ICC system and drive. 

CAUTION:

Always drive safely. 

3.

Stop the vehicle.

4.

Perform “All DTC Reading” with CONSULT-III. 

5.

Check if the “C1A14” is detected as the current malfunction in self-diagnosis results of “ICC”. 

Is “C1A14” detected as the current malfunction?

YES

>> Refer to 

CCS-246, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-36, "Intermittent Incident"

. 

Diagnosis Procedure

INFOID:0000000005501837

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “C1A14” in “Self Diagnostic Result” of “ICC”. 
Is “U1000” detected?

YES

>> Perform the CAN communication system inspection. Repair or replace the malfunctioning parts.

Refer to 

CCS-313, "ICC SENSOR INTEGRATED UNIT : DTC Logic"

. 

NO

>> GO TO 2.

2.

PERFORM SELF-DIAGNOSIS OF ECM

Check if any DTC is detected in “Self Diagnostic Result” of “ENGINE”. 
Is any DTC detected?

YES

>> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to

EC-541, "DTC Index"

 (VQ35HR) or 

EC-1179, "DTC Index"

 (VK50VE). 

NO

>> Replace the ICC sensor integrated unit. Refer to 

CCS-380, "Exploded View"

. 

Special Repair Requirement

INFOID:0000000005501838

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

DTC

(On board dis-

play)

Trouble diagnosis name

DTC detecting condition

Possible causes

C1A14

(14)

ECM CIRCUIT

If ECM is malfunctioning

• Accelerator pedal position sensor
• ECM
• ICC sensor integrated unit

CCS

C1A14 ECM

CCS-247

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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