Infiniti Q45. Manual - part 14

 

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Infiniti Q45. Manual - part 14

 

 

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS

ACS-49

[ICC]

C

D

E

F

G

H

I

J

L

M

A

B

ACS

7. 

CHECK ICC BRAKE HOLD RELAY CIRCUIT

1.

Disconnect ICC unit connector and stop lamp switch connector.

2.

Check continuity between ICC unit harness connector and ICC
brake hold relay harness connector.

3.

Check continuity between ICC unit harness connector and
ground.

OK or NG

OK

>> GO TO 8.

NG

>> 1. Repair harness between ICC unit and ICC brake hold relay.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

8. 

CHECK STOP LAMP SWITCH CIRCUIT

Check continuity between ICC unit harness connector and stop lamp
switch harness connector.

OK or NG

OK

>> 1. Replace ICC unit.

2. Erase DTC and perform ICC system running test.

Then perform self-diagnosis of ICC system again.

NG

>> 1. Repair harness between ICC unit and stop lamp

switch.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

DTC 46 OPERATION SW CIRC

NKS001KL

1. 

CHECK CONNECTOR FOR ECM

1.

Turn ignition switch OFF.

2.

Disconnect ECM connector, and connect it securely again.

3.

Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.

Is malfunction indicated?

YES

>> GO TO 2.

NO

>> Poor connector connection

1. Check connector. (Check connector housing for disconnected, loose, bent, and collapsed ter-

minals. If any malfunction is detected, repair applicable part.) 

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

ICC unit connector

Terminal

ICC brake hold 

relay connector

Terminal

Continuity

B244

38

E38

7

Yes

ICC unit connector

Terminal

Ground

Continuity

B244

38

No

PKIA9907E

ICC unit connector

Terminal

Stop lamp switch 

connector

Terminal

Continuity

B244

38

M402

4

Yes

PKIA9911E

ACS-50

[ICC]

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS

2. 

CHECK ICC STEERING SWITCH

Check ICC steering switch. Refer to 

ACS-77, "ICC Steering Switch"

 .

OK or NG

OK

>> GO TO 3.

NG

>> 1. Replace ICC steering switch.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

3. 

CHECK HARNESS BETWEEN SPIRAL CABLE AND ECM

1.

Turn ignition switch OFF.

2.

Disconnect ECM connector and spiral cable connector.

3.

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

4.

Check continuity between spiral cable harness connector and
ground.

OK or NG

OK

>> GO TO 4.

NG

>> 1. Repair harness between spiral cable and ECM.

2. Erase DTC and perform ICC system running test.

Then perform self-diagnosis of ICC system again.

4. 

CHECK COMBINATION SWITCH (SPIRAL CABLE)

Check continuity between spiral cable (on vehicle) and spiral cable
(on switch).

OK or NG

OK

>> GO TO 5.

NG

>> 1. Replace spiral cable.

2. Erase DTC and perform ICC system running test.

Then perform self-diagnosis of ICC system again.

Spiral cable 

connector

Terminal

ECM connector

Terminal

Continuity

M53

31

F101

67

Yes

26

99

PKIA9822E

Spiral cable 

connector

Terminal

Ground

Continuity

M53

31

No

26

PKIB1442E

Terminal

Terminal

Continuity

26

18

Yes

31

17

PKIA9823E

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS

ACS-51

[ICC]

C

D

E

F

G

H

I

J

L

M

A

B

ACS

5. 

CHECK HARNESS BETWEEN SPIRAL CABLE AND ICC STEERING SWITCH

1.

Check continuity between spiral cable harness connector and
ICC steering switch harness connector.

2.

Check continuity between spiral cable harness connector and
ground.

OK or NG

OK

>> 1. Perform ECM self-diagnosis.

2. After repairing or replacing applicable item, erase

DTC and perform ICC system running test. Then per-
form self-diagnosis of ICC system again.

NG

>> 1. Replace driver air bag module.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

DTC 61 PRESS SEN CIRCUIT

NKS001KM

1. 

CHECK BRAKE PRESSURE SENSOR AND ICC UNIT CONNECTORS

1.

Turn ignition switch OFF.

2.

Disconnect brake pressure sensor connector and ICC unit connector, and connect them securely again. 

3.

Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.

Is malfunction indicated?

YES

>> GO TO 2.

NO

>> Poor connector connection

1. Check connector. (Check connector housing for disconnected, loose, bent, and collapsed ter-

minals. If any malfunction is detected, repair applicable part.)

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

Spiral cable 

connector

Terminal

ICC steering switch 

connector

Terminal

Continuity

M441

18

M443

1

Yes

17

2

PKIA9955E

Spiral cable 

connector

Terminal

Ground

Continuity

M441

18

No

17

PKIB1443E

ACS-52

[ICC]

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS

2. 

CHECK HARNESS BETWEEN BRAKE PRESSURE SENSOR AND ICC UNIT

1.

Turn ignition switch OFF.

2.

Disconnect ICC unit connector and brake pressure sensor con-
nector.

3.

Check continuity between brake pressure sensor harness con-
nector and ICC unit harness connector.

4.

Check continuity between ICC unit harness connector and
ground.

OK or NG

OK

>> GO TO 3.

NG

>> 1. Repair harness between brake pressure sensor and

ICC unit.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

3. 

CHECK POWER SUPPLY CIRCUIT FOR BRAKE PRESSURE SENSOR

1.

Connect ICC unit connector.

2.

Turn ignition switch ON.

3.

Check voltage between ICC unit connector terminals.

OK or NG

OK

>> 1. Replace brake pressure sensor. Refer to 

BR-13,

"BRAKE MASTER CYLINDER"

 .

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

NG

>> 1. Replace ICC unit.

2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system

again.

Brake pressure 

sensor connector

Terminal

ICC unit 

connector

Terminal

Continuity

E82

1

B243

24

Yes

2

17

3

8

ICC unit connector

Terminal

Ground

Continuity

B243

8

No

17

24

SKIA6652E

PKIB1444E

ICC unit connector

Terminal

Voltage (Approx.)

(+)

(

−

)

B243

8 

24

 5 V

SKIA6653E

 

 

 

 

 

 

 

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