Infiniti FX35, FX50 (S51). Manual - part 316

CCS-84

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

C1A13 STOP LAMP RELAY

YES

>> GO TO 20.

NO

>> GO TO 11.

11.

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 20.

NO

>> Replace ICC brake hold relay. 

12.

CHECK HARNESS BETWEEN BRAKE BOOSTER CONTROL UNIT AND ICC BRAKE HOLD RELAY

1.

Turn ignition switch OFF.

2.

Disconnect brake booster control unit connector and remove ICC brake hold relay. 

3.

Check for continuity between the brake booster control unit harness connector and ICC brake hold relay
harness connector. 

4.

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

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> Repair the harnesses or connectors.

13.

CHECK HARNESS BETWEEN ICC BRAKE HOLD RELAY AND GROUND

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

Is the inspection result normal?

YES

>> GO TO 14.

NO

>> Repair the harnesses or connectors.

14.

CHECK ICC BRAKE HOLD RELAY

Check resistance between ICC brake hold relay terminals. 

Is the inspection result normal?

YES

>> GO TO 15.

NO

>> Replace ICC brake hold relay. 

ICC brake hold relay

Continuity

Terminal

7

6

Not existed

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

ICC brake hold relay

Ground

Continuity

Connector

Terminal

E91

2

Existed

ICC brake hold relay

Resistance

Terminal

1

2

Approx. 75 

Ω

CCS

C1A13 STOP LAMP RELAY

CCS-85

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

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15.

CHECK BRAKE BOOSTER CONTROL UNIT OUTPUT VOLTAGE

1.

Connect the brake booster control unit connector. 

2.

Turn ignition switch ON.

3.

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

Is the inspection result normal?

YES

>> GO TO 16.

NO

>> GO TO 21.

16.

CHECK ICC BRAKE HOLD RELAY POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

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

Is the inspection result normal?

YES

>> GO TO 17.

NO

>> Repair or replace ICC brake hold relay power supply circuit. 

17.

CHECK HARNESS BETWEEN ICC BRAKE HOLD RELAY AND ECM

1.

Disconnect ECM, rear combination lamp, and high-mounted stop lamp connectors. 

2.

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

VQ35HR

VK50VE

3.

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

Is the inspection result normal?

YES

>> GO TO 18.

Terminal

Condition

Voltage

(Approx.)

(+)

(–)

ICC brake hold relay

Ground

Active Test 

item

“STOP LAMP”

Connector

Terminal

E91

1

Off

 0 V

On

Battery 
voltage

Terminal

Voltage

(Approx.)

(+)

(–)

ICC brake hold relay

Ground

Connector

Terminal

E91

7

Battery 
voltage

ICC brake hold relay

ECM

Continuity

Connector

Terminal

Connector

Terminal

E91

6

M107

122

Existed

ICC brake hold relay

ECM

Continuity

Connector

Terminal

Connector

Terminal

E91

6

M160

110

Existed

ICC brake hold relay

Ground

Continuity

Connector

Terminal

E91

6

Not existed

CCS-86

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

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-184, "Exploded View"

. 

Component Inspection

INFOID:0000000005501626

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-87

< DTC/CIRCUIT DIAGNOSIS >

[ICC (FULL SPEED RANGE)]

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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:0000000005501627

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

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