Infiniti Q45. Manual - part 19

TROUBLE DIAGNOSIS FOR SYMPTOMS

ACS-69

[ICC]

C

D

E

F

G

H

I

J

L

M

A

B

ACS

Symptom 1: MAIN Switch Does Not Turn ON

*1

 , MAIN Switch Does Not Turn 

OFF

*2

NKS001L2

NOTE:

●

*1: The ICC system display in the combination meter does not illuminate. 

●

*2: The ICC system display in the combination meter remains powered.

1. 

CHECK MAIN SWITCH

With CONSULT-II

With “ICC” “DATA MONITOR”, check if “MAIN SW” operates normally.

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 3.

2. 

CHECK CONNECTOR FOR ICC UNIT

1.

Turn ignition switch OFF.

2.

Disconnect ICC unit connector.

3.

Check connector housing for disconnected, loose, bent, and collapsed terminals.

OK or NG

OK

>> GO TO 3.

NG

>> Poor connector connection

1. Repair ICC unit connector.

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

again.

3. 

PERFORM ICC UNIT SELF-DIAGNOSIS

With CONSULT-II

1.

Perform self-diagnosis with CONSULT-II. 

2.

Check if “DTC 20 CAN COMM CIRCUIT” is indicated.

Is it indicated?

YES

>> Refer to 

ACS-45, "DTC 20 CAN COMM CIRCUIT"

 .

NO

>> Refer to 

ACS-49, "DTC 46 OPERATION SW CIRC"

 .

Symptom 2: ICC System Cannot Be Set (MAIN Switch Turns ON/OFF)

NKS001L3

The ICC cannot be set in the following cases.

●

When the vehicle speed is not in range of approx. 40 km/h (25 MPH) to 144 km/h (90 MPH).

●

When the A/T selector lever is in “N” position.

●

While the brake is in operation.

1. 

CHECK CAUSE OF AUTOMATIC CANCELLATION

 With CONSULT-II

With “CAUSE OF AUTO-CANCEL” in “WORK SUPPORT”, check if any cause of cancellation exists.

OK or NG

OK

>> Cancel with appropriate cause, and go to specified diagnosis.

●

“OPE SW VOLT CIRC”: Refer to 

ACS-49, "DTC 46 OPERATION SW CIRC"

 .

●

“VHCL SPD UNMATCH”: Refer to 

ACS-46, "DTC 41 VHCL SPEED SE CIRC"

 .

●

“IGN LOW VOLT”: Refer to 

ACS-45, "DTC 31 POWER SUPPLY CIR, DTC 34 POWER SUP-

PLY CIR 2"

 .          

NG

>> GO TO 2.

ACS-70

[ICC]

TROUBLE DIAGNOSIS FOR SYMPTOMS

2. 

PERFORM ICC UNIT SELF-DIAGNOSIS

 With CONSULT-II

Perform self-diagnosis to check for malfunctioning items.

OK or NG

OK

>> GO TO 3.

NG

>> 1. Repair or replace applicable item.

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

again.

3. 

CHECK SWITCHES AND VEHICLE SPEED SIGNAL

 With CONSULT-II

With “ICC” “DATA MONITOR”, check if switches and vehicle speed signal operate normally. Refer to 

ACS-34,

"DATA MONITOR"

 .

●

VHCL SPEED SE 

●

D RANGE SW

●

BRAKE SW                  

●

SET/COAST SW

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

>>

●

VHCL SPEED SE. Refer to 

ACS-46, "DTC 41 VHCL SPEED SE CIRC"

 .

●

D RANGE SW. Refer to 

ACS-71, "Symptom 4: ICC System Is Not Cancelled When the A/T

Selector Lever Is in Other Than “D” and “M” Position"

 .

●

BRAKE SW. Refer to 

ACS-47, "DTC 45 BRAKE SW/STOP L SW"

 .

●

SET/COAST SW. Refer to 

ACS-49, "DTC 46 OPERATION SW CIRC"

 .

Symptom 3: ICC System Cannot Be Operated by CANCEL Switch, RESUME/
ACCELERATE Switch or DISTANCE Switch

NKS001L4

RESUME does not function in the following cases.

●

When MAIN switch is turned off once.

●

When the vehicle speed is less than 40 km/h (25 MPH).

1. 

CHECK SWITCHES

 With CONSULT-II

With “ICC” “DATA MONITOR”, check if switches operate normally.
“RESUME/ACC SW”, “CANCEL SW”, “DISTANCE ADJ”. Refer to 

ACS-34, "DATA MONITOR"

 .

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

>> GO TO 2.

2. 

PERFORM ICC UNIT SELF-DIAGNOSIS

With CONSULT-II

1.

Perform self-diagnosis.

2.

Check if “DTC 20 CAN COMM CIRCUIT” is indicated.

Is it indicated?

YES

>> Refer to 

ACS-45, "DTC 20 CAN COMM CIRCUIT"

 .

NO

>> Refer to 

ACS-49, "DTC 46 OPERATION SW CIRC"

 .

TROUBLE DIAGNOSIS FOR SYMPTOMS

ACS-71

[ICC]

C

D

E

F

G

H

I

J

L

M

A

B

ACS

Symptom 4: ICC System Is Not Cancelled When the A/T Selector Lever Is in 
Other Than “D” and “M” Position

NKS001L5

1. 

CHECK D RANGE SWITCH

 With CONSULT-II

With “ICC” “DATA MONITOR”, check if “D RANGE SW” and “NP RANGE SW” operates normally. Refer to

ACS-34, "DATA MONITOR"

 .

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

>> GO TO 2.

2. 

PERFORM ICC UNIT SELF-DIAGNOSIS

 With CONSULT-II

1.

Perform self-diagnosis.

2.

Check if “DTC 20 CAN COMM CIRCUIT” is indicated.

Is it indicated?

YES

>> Refer to 

ACS-45, "DTC 20 CAN COMM CIRCUIT"

 .

NO

>> GO TO 3.

3. 

CHECK D RANGE SWITCH

 With CONSULT-II

With TCM “DATA MONITOR”, check if “D” position switch operates normally.

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 or replace applicable item.

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

again.

Symptom 5: Chime Does Not Sound

NKS001L6

The chime may not sound occasionally in the following cases even if the distance from the vehicle ahead is
short:

●

When the speed difference from that of the vehicle ahead is small (both vehicles driving at similar speed).

●

When the vehicle ahead drives at faster speed (the actual distance is increasing).

●

When depressing the accelerator.

●

Chime does not sound when the vehicle is not driving.

●

Chime does not sound when the system does not detect any vehicle ahead. (Diagnose the conditions
under which the system is detecting the vehicle ahead and when the system is malfunctioning. If there is
any malfunction in detecting the vehicle ahead, check the system following; 

ACS-75, "Symptom 8: ICC

System Frequently Cannot Detect the Vehicle Ahead/ Detection Zone Is Short"

 .)

1. 

CHECK ICC WARNING CHIME

With CONSULT-II

With “ACTIVE TEST”, check if ICC warning chime operates normally.
OK or NG

OK

>> Determine preceding vehicle detection status when malfunction occurred. If chime should have

sounded: after replacing ICC unit, erase DTC. Perform ICC system running test, and then perform
self-diagnosis of ICC system again.

NG

>>  GO TO 2

ACS-72

[ICC]

TROUBLE DIAGNOSIS FOR SYMPTOMS

2. 

CHECK ICC UNIT AND ICC WARNING CHIME CONNECTORS

1.

Turn ignition switch OFF.

2.

Disconnect ICC unit connector and ICC warning chime connector. 

3.

Check connector housing for disconnected, loose, bent, and collapsed terminals.

OK or NG

OK

>> GO TO 3.

NG

>> Poor connector connection

1. Repair terminal and connector.

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

again.

3. 

CHECK ICC WARNING CHIME SIGNAL

1.

Connect ICC unit connector and ICC warning chime connector.

2.

Turn ignition switch ON.

3.

Check voltage between ICC warning chime harness connector and ground.

–

With LDW models

–

Without LDW models

OK or NG

OK

>> GO TO 4.

NG

>> 1. Repair or replace harness or fuse. 

2. Erase DTC and perform ICC system running test.

Then perform self-diagnosis of ICC system again.

Terminals

Voltage (Approx.)

(+)

(

−

)

ICC warning chime 

connector

Terminal

M22

1

Ground

 Battery voltage

PKIC4920E

Terminals

Voltage (Approx.)

(+)

(

−

)

ICC warning chime 

connector

Terminal

M37

1

Ground

 Battery voltage

PKIA9825E