Infiniti FX35, FX50 (S51). Manual - part 315

CCS-80

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

C1A12 LASER BEAM OFF CENTER

C1A12 LASER BEAM OFF CENTER

Description

INFOID:0000000005501619

ICC sensor integrated unit detects the reflected light from the vehicle ahead by irradiating a laser forward. It
calculates the distance from and relative speed with the vehicle ahead based on the detected signal. 

DTC Logic

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DTC DETECTION LOGIC

Diagnosis Procedure

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1.

ADJUST LASER BEAM AIMING

1.

Adjust the laser beam aiming with CONSULT-III. Refer to 

CCS-13, "LASER BEAM AIMING ADJUST-

MENT : Description"

. 

2.

Perform “All DTC Reading”. 

3.

Check if the “C1A12” is detected in “Self Diagnostic Result” of “ICC”. 

Is “C1A12” detected?

YES

>> Replace ICC sensor integrated unit. Refer to 

CCS-184, "Exploded View"

. 

NO

>> INSPECTION END

Special Repair Requirement

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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

DTC

(On board dis-

play)

Trouble diagnosis name

DTC detecting condition

Possible causes

C1A12

(12)

LASER BEAM OFFCNTR

Laser beam of ICC sensor integrated unit is 
off the aiming point

Laser beam is off the aiming point

CCS

C1A13 STOP LAMP RELAY

CCS-81

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

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C1A13 STOP LAMP RELAY

Description

INFOID:0000000005501623

• The ICC sensor integrated unit transmits the ICC brake hold relay drive signal to the brake booster control

unit via ITS communication. 

• The ICC brake hold relay activates the stop lamp by the ICC brake hold relay drive signal (stop lamp drive

signal) outputted by the brake booster control unit.

DTC Logic

INFOID:0000000005501624

DTC DETECTION LOGIC

NOTE:
If DTC “C1A13” 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)

1.

Start the engine.

2.

Perform the active test item “STOP LAMP” with CONSULT-III. 

3.

Perform “All DTC Reading”. 

4.

Check if the “C1A13” is detected as the current malfunction in the “Self Diagnostic Result” of “ICC”. 

Is “C1A13” detected as the current malfunction?

YES

>> Refer to 

CCS-81, "Diagnosis Procedure"

.

NO

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE (2)

1.

Drive at the vehicle speed of 40 km/h (25 MPH) or more for approximately 20 seconds or more without the
brake pedal depressed. 

CAUTION:

Always drive safely. 
NOTE:
If it is outside the above condition, repeat step 1. 

2.

Perform “All DTC Reading”. 

3.

Check if the “C1A13” is detected as the current malfunction in the “Self Diagnostic Result” of “ICC”. 

Is “C1A13” detected as the current malfunction?

YES

>> Refer to 

CCS-81, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-36, "Intermittent Incident"

. 

Diagnosis Procedure

INFOID:0000000005501625

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “C1A13” in “Self Diagnostic Result” of “ICC”. 
Is “U1000” detected?

DTC

(On board dis-

play)

Trouble diagnosis name

DTC detecting condition

Possible causes

C1A13

(13)

STOP LAMP RLY FIX

• If the stop lamp is not activated even 

though the ICC sensor integrated unit is 
transmitting a ICC brake hold relay drive 
signal.

• If the stop lamp is activated even though 

the ICC sensor integrated unit is not trans-
mitting a ICC brake hold relay drive signal. 

• Stop lamp switch circuit
• ICC brake switch circuit
• ICC brake hold relay circuit
• Stop lamp switch
• ICC brake switch
• ICC brake hold relay
• Incorrect stop lamp switch installation
• Incorrect ICC brake switch installation
• ECM

CCS-82

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

C1A13 STOP LAMP RELAY

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 STOP LAMP SWITCH AND ICC BRAKE SWITCH

Check that “STOP LAMP SW” and “BRAKE SW” operate normally in “DATA MONITOR” of “ICC”. 
Is the inspection result normal?

YES

>> GO TO 12.

NO-1

>> When “BRAKE SW” operation is malfunctioning: GO TO 3.

NO-2

>> When “STOP LAMP SW” operation is malfunctioning: GO TO 9.

3.

CHECK ICC BRAKE SWITCH INSTALLATION

1.

Turn ignition switch OFF.

2.

Check ICC brake switch for correct installation. Refer to 

BR-7, "Inspection and Adjustment"

. 

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Adjust ICC brake switch installation. Refer to 

BR-7, "Inspection and Adjustment"

. 

4.

CHECK ICC BRAKE SWITCH

1.

Disconnect ICC brake switch connector. 

2.

Check ICC brake switch. Refer to 

CCS-64, "Component Inspection (ICC Brake Switch)"

. 

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace ICC brake switch. 

5.

CHECK ICC BRAKE HOLD RELAY

1.

Remove ICC brake hold relay. 

2.

Check for continuity between ICC brake hold relay terminals. 

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace ICC brake hold relay. 

6.

CHECK HARNESS BETWEEN ICC BRAKE HOLD RELAY AND ICC BRAKE SWITCH

1.

Check for continuity between ICC brake hold relay harness connector and ICC brake switch harness con-
nector. 

2.

Check for continuity between ICC brake hold relay harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair the harnesses or connectors.

7.

CHECK HARNESS BETWEEN ECM AND ICC BRAKE SWITCH

1.

Disconnect ECM connector. 

ICC brake hold relay

Continuity

Terminal

3

4

Existed

ICC brake hold relay

ICC brake switch

Continuity

Connector

Terminal

Connector

Terminal

E91

4

E114

1

Existed

ICC brake hold relay

Ground

Continuity

Connector

Terminal

E91

4

Not existed

CCS

C1A13 STOP LAMP RELAY

CCS-83

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

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2.

Check for continuity between the ECM harness connector and ICC brake switch harness connector. 

VQ35HR

VK50VE

3.

Check for continuity between ECM harness connector and ground. 

VQ35HR

VK50VE

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair the harnesses or connectors.

8.

CHECK ICC BRAKE HOLD RELAY POWER SUPPLY CIRCUIT

1.

Connect ECM connector. 

2.

Turn the ignition switch ON.

3.

Check the voltage between ICC brake hold relay harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 20.

NO

>> Repair ICC brake hold relay power supply circuit. 

9.

CHECK STOP LAMP FOR ILLUMINATION

1.

Turn the ignition switch OFF.

2.

Remove ICC brake hold relay. 

3.

Check that the stop lamp is illuminated by depressing the brake pedal to turn the stop lamp ON. 

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Check the stop lamp circuit, and repair or replace the malfunctioning parts. 

10.

CHECK ICC BRAKE HOLD RELAY CIRCUIT

1.

Connect ICC brake hold relay. 

2.

Disconnect the stop lamp switch connector. 

3.

Check that the stop lamp does not illuminate when brake pedal is not depressed. 

Is the inspection result normal?

ECM

ICC brake switch

Continuity

Connector

Terminal

Connector

Terminal

M107

126

E114

2

Existed

ECM

ICC brake switch

Continuity

Connector

Terminal

Connector

Terminal

M160

117

E114

2

Existed

ECM

Ground

Continuity

Connector

Terminal

M107

126

Not existed

ECM

Ground

Continuity

Connector

Terminal

M160

117

Not existed

Terminals

Voltage

(Approx.)

(+)

(–)

ICC brake hold relay

Ground

Connector

Terminal

E91

3

Battery 
voltage