Infiniti FX35, FX50 (S51). Manual - part 311

CCS-64

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

C1A05 BRAKE SW/STOP LAMP SW

3.

Check for continuity between brake booster control unit harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 12.

NO

>> Repair the harnesses or connectors.

12.

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 13.

13.

CHECK ICC BRAKE HOLD RELAY DRIVE SIGNAL OUTPUT

1.

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

2.

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

Is the inspection result normal?

YES

>> Replace brake booster control unit. 

NO

>> Replace ICC sensor integrated unit. Refer to 

CCS-184, "Exploded View"

. 

Component Inspection (ICC Brake Switch)

INFOID:0000000005501592

1.

CHECK ICC BRAKE SWITCH

Check for continuity between ICC brake switch terminals. 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace ICC brake switch. 

Component Inspection (Stop Lamp Switch)

INFOID:0000000005501593

1.

CHECK STOP LAMP SWITCH

Check for continuity between stop lamp switch terminals. 

Is the inspection result normal?

Brake booster control unit

ICC brake hold relay

Continuity

Connector

Terminal

Connector

Terminal

B249

47

E91

1

Existed

Brake booster control unit

Ground

Continuity

Connector

Terminal

B249

47

Not existed

Terminal

Condition

Continuity

1

2

When brake pedal is depressed

Not exist-

ed

When brake pedal is released

Existed

Terminal

Condition

Continuity

1

2

When brake pedal is depressed

Existed

When brake pedal is released

Not exist-

ed

CCS

C1A05 BRAKE SW/STOP LAMP SW

CCS-65

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

C

D

E

F

G

H

I

J

K

L

M

B

N

P

A

YES

>> INSPECTION END

NO

>> Replace stop lamp switch. 

Special Repair Requirement

INFOID:0000000005501594

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 ICC SYSTEM

1.

Erase the “Self Diagnostic Result”, and then perform “All DTC Reading” again after performing the action
test. (Refer to 

CCS-18, "ACTION TEST : Description"

 for action test.)

2.

Check that the ICC system is normal. 

>> WORK END

CCS-66

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

C1A06 OPERATION SW

C1A06 OPERATION SW

Description

INFOID:0000000005501595

• Operate the ICC system ON/OFF and vehicle speed/vehicle distance setting by the ICC steering switch. 
• The ICC steering switch signal is input to the ECM. It is transmitted from ECM to ICC sensor integrated unit

via CAN communication. 

DTC Logic

INFOID:0000000005501596

DTC DETECTION LOGIC

NOTE:
If DTC “C1A06” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to 

CCS-137,

"DTC Logic"

. 

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Wait for approximately 5 minutes after turning the MAIN switch of ICC system ON. 

3.

Perform “All DTC Reading” with CONSULT-III. 

4.

Check if the “C1A06” is detected as the current malfunction in “Self Diagnostic Result” of “ICC”. 

Is “C1A06” detected as the current malfunction?

YES

>> Refer to 

CCS-66, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-36, "Intermittent Incident"

. 

Diagnosis Procedure

INFOID:0000000005501597

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “C1A06” 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-137, "DTC Logic"

. 

NO

>> GO TO 2.

2.

CHECK ICC STEERING SWITCH

1.

Turn the ignition switch OFF.

2.

Disconnect the ICC steering switch connector. 

3.

Check the ICC steering switch. Refer to 

CCS-67, "Component Inspection"

. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace the ICC steering switch. 

3.

CHECK HARNESS BETWEEN SPIRAL CABLE AND ECM

1.

Disconnect the ECM connector. 

2.

Check for continuity between the spiral cable harness connector and ECM harness connector. 

VQ35HR

DTC

(On board dis-

play)

Trouble diagnosis 

name

DTC detecting condition

Possible causes

C1A06

(6)

OPERATION SW 
CIRC

If the input signal from ICC steering switch is 
malfunctioning

• ICC steering switch circuit
• ICC steering switch
• ECM

Spiral cable

ECM

Continuity

Connector

Terminal

Connector

Terminal

CCS

C1A06 OPERATION SW

CCS-67

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

C

D

E

F

G

H

I

J

K

L

M

B

N

P

A

VK50VE

3.

Check for continuity between spiral cable harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair the harnesses or connectors.

4.

CHECK SPIRAL CABLE

Check for continuity between spiral cable terminals. 

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace the spiral cable. 

5.

PERFORM SELF-DIAGNOSIS OF ECM

1.

Connect the connectors of ICC steering switch and ECM connector. 

2.

Turn the ignition switch ON.

3.

Perform “All DTC Reading”. 

4.

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

Is any DTC detected?

YES

>> Perform self-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-184, "Exploded View"

. 

Component Inspection

INFOID:0000000005501598

1.

CHECK ICC STEERING SWITCH

Check resistance between ICC steering switch terminals. 

M36

25

M107

101

Existed

32

108

Spiral cable

ECM

Continuity

Connector

Terminal

Connector

Terminal

M36

25

M160

102

Existed

32

111

Spiral cable

Ground

Continuity

Connector

Terminal

M36

25

Not existed

32

Spiral cable

Continuity

Terminal

13

25

Existed

16

32

JSOIA0141GB