Infiniti QX56 (JA60). Manual - part 174

CCS-32

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DTC 74 LASER BEAM OFF CNTR

DTC 74 LASER BEAM OFF CNTR

DTC 74 LASER BEAM OFF CNTR

INFOID:0000000005145993

1.

DIAGNOSTIC CHECK

1. Adjust laser beam aiming. Refer to 

CCS-5, "LASER BEAM AIMING ADJUSTMENT : Outline of Laser

Beam Aiming Adjustment Procedure"

. Erase DTC and perform ICC system running test. Refer to 

CCS-8,

"ACTION TEST : ICC System Running Test"

 .

2. Perform self-diagnosis of ICC system. 
Is DTC 74 LASER BEAM OFF CNTR incidated?

YES

>> • Replace ICC sensor and adjust laser beam aiming. Refer to 

CCS-72, "ICC Sensor"

 .

• Erase DTC and perform ICC system running test. Refer to 

CCS-8, "ACTION TEST : ICC Sys-

tem Running Test"

.

NO

>> Inspection end.

CCS

DTC 90 STOP LAMP RLY FIX

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DTC 90 STOP LAMP RLY FIX

DTC 90 STOP LAMP RLY FIX

INFOID:0000000005145994

Regarding Wiring Diagram information, refer to 

CCS-48, "Wiring Diagram"

.

1.

CHECK ICC UNIT CONNECTOR 

1. Turn ignition switch OFF.

2. Disconnect and check ICC unit connector.
Does connector check OK?

YES

>> GO TO 2

NO

>> • Connector malfunction.

• Erase DTC and perform ICC system running test. Refer to 

CCS-8, "ACTION TEST : ICC Sys-

tem Running Test"

. 

2.

CHECK STOP LAMP SWITCH AND ICC BRAKE SWITCH 

1. Connect ICC unit connector and turn ignition switch ON.

2. With data monitor, check that “STOP LAMP SW” and “BRAKE SW” operate normally.
Do the monitor items display normally?

YES

>> GO TO 11

NO

>> • BRAKE SW: GO TO 3

• STOP LAMP SW: GO TO 8

3.

CHECK AND ADJUST ICC BRAKE SWITCH

Check ICC brake switch for proper installation and adjust if necessary.
Does the ICC brake switch pass inspection?

YES

>> GO TO 4

NO

>> After adjustment, erase DTC and perform ICC system running test. Refer to 

CCS-8, "ACTION

TEST : ICC System Running Test"

.

4.

CHECK ICC BRAKE SWITCH

Check ICC brake switch. Refer to 

CCS-28, "DTC 45 BRAKE SW/STOP L SW"

 .

Is the ICC brake switch operating normally?

YES

>> GO TO 5

NO

>> Replace ICC brake switch. Erase DTC and perform ICC system running test. Refer to 

CCS-8,

"ACTION TEST : ICC System Running Test"

. 

5.

CHECK ICC BRAKE HOLD RELAY 

Disconnect ICC brake hold relay and check continuity between ICC

brake hold relay terminal 4 and terminal 3.

Does continuity exist?

YES

>> GO TO 6

NO

>> Replace ICC brake hold relay. Erase DTC and perform

ICC system running test. Refer to 

CCS-8, "ACTION

TEST : ICC System Running Test"

. 

6.

CHECK HARNESS THROUGH ICC BRAKE HOLD RELAY, ICC BRAKE SWITCH, ICC UNIT

1. Disconnect  ECM and ICC unit harness connectors.

Continuity should exist.

SKIA6658E

CCS-34

< COMPONENT DIAGNOSIS >

DTC 90 STOP LAMP RLY FIX

2. Check continuity between ICC brake hold relay harness connec-

tor (B) E134 terminal 3 and ICC unit harness connector (A) B17

terminal 29.

3. Check continuity between ICC unit harness connector (A) B17

terminal 29 and ground.

Are continuity test results as specified?

YES

>> GO TO 7

NO

>> • Repair harness between ICC brake hold relay and ICC brake switch.

• Repair harness between ICC brake switch and ICC unit.

• Erase DTC and perform ICC system running test. Refer to 

CCS-8, "ACTION TEST : ICC Sys-

tem Running Test"

.

7.

CHECK ICC BRAKE HOLD RELAY POWER SUPPLY CIRCUIT 

1. Turn ignition switch ON.

2. Check voltage between ICC brake hold relay harness connector

E134 terminal 4 and ground.

Does battery voltage exist?

YES

>> Replace ICC unit. Refer to 

CCS-71, "ICC Unit"

. Erase

DTC and perform ICC system running test. Refer to

CCS-8, "ACTION TEST : ICC System Running Test"

.

NO

>> • Check fuse or ICC brake hold relay power supply sys-

tem harness.

• Erase DTC and perform ICC system running test. Refer to 

CCS-8, "ACTION TEST : ICC Sys-

tem Running Test"

. 

8.

CHECK STOP LAMP SWITCH

1. Turn ignition switch OFF.

2. Check stop lamp switch.
Does stop lamp switch operate normally?

YES

>> GO TO 9

NO

>> Replace stop lamp switch. Erase DTC and perform ICC system running test. Refer to 

CCS-8,

"ACTION TEST : ICC System Running Test"

.

9.

CHECK ICC BRAKE HOLD RELAY CIRCUIT 

1. Disconnect stop lamp switch connector.

2. When brake pedal is not depressed, make sure that stop lamp does not illuminate.
Does the ICC brake hold relay check OK?

YES

>> Replace ICC unit. Refer to 

CCS-71, "ICC Unit"

. Erase DTC and perform ICC system running test.

Refer to 

CCS-8, "ACTION TEST : ICC System Running Test"

. 

NO

>> GO TO 10

10.

CHECK ICC BRAKE HOLD RELAY 

Continuity should exist.

Continuity should not exist.

ALOIA0008ZZ

Battery voltage should exist

ALOIA0009ZZ

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DTC 90 STOP LAMP RLY FIX

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1. Disconnect ICC brake hold relay.

2. Check continuity between ICC brake hold relay E134 terminal 7

and terminal 6.

Are continuity test results as specified?

YES

>> Replace ICC unit. Refer to 

CCS-71, "ICC Unit"

. Erase

DTC and perform ICC system running test. Refer to

CCS-8, "ACTION TEST : ICC System Running Test"

. 

NO

>> Replace ICC brake hold relay. Erase DTC and perform

ICC system running test. Refer to 

CCS-8, "ACTION

TEST : ICC System Running Test"

.

11.

 CHECK HARNESS THROUGH ICC UNIT, ICC BRAKE HOLD RELAY, AND GROUND

1. Disconnect ICC unit and ICC brake hold relay harness connec-

tors.

2. Check continuity between ICC unit harness connector B17 ter-

minal 47 and ICC brake hold relay harness connector E134 ter-

minal 1.

3. Check continuity between ICC unit harness connector B17 ter-

minal 47 and ground.

4. Check continuity between ICC brake hold relay harness connec-

tor E134 terminal 2 and ground.

Are continuity test results as specified?

YES

>> GO TO 12

NO

>> • Repair harness through ICC unit and ICC brake hold

relay, or between ICC brake hold relay and ground.

• Erase DTC and perform ICC system running test.

Refer to 

CCS-8, "ACTION TEST : ICC System Run-

ning Test"

.

12.

CHECK ICC BRAKE HOLD RELAY 

Check continuity between ICC brake hold relay terminal 1 and termi-

nal 2.

Does continuity exist?

YES

>> GO TO 13

NO

>> Replace ICC brake hold relay. Erase DTC and perform

ICC system running test. Refer to 

CCS-8, "ACTION

TEST : ICC System Running Test"

.

13.

CHECK ICC UNIT STANDARD VOLTAGE 

Continuity should not exist.

SKIA6659E

47 - 1

Continuity should exist.

47 - Ground

Continuity should not exist.

SKIA6660E

Continuity should exist.

SKIA6661E

Continuity should exist
(minimal resistance through coil will exist)

SKIA6662E