Infiniti M45 (Y34). Manual - part 18

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

ACS-65

[ICC]

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When more than one malfunctions are detected, a maximum of 3 code numbers can be stored;
the latest malfunction will be displayed first.

6.

Check 

ACS-68, "Diagnostic Trouble Code (DTC) Chart"

 , and repair or replace if necessary.

7.

After repair, erase DTCs stored in the ICC unit.

8.

DTC 55 will be shown.

9.

Turn ignition switch OFF to exit the diagnosis.

10. Perform ICC system running test (drive vehicle with ICC system ON), and make sure that ICC warning

lamp does not illuminate.

Self-Diagnostic Erasing Method

1.

Stop the vehicle and turn the ignition switch OFF.

2.

Turn ignition switch ON and start self-diagnosis.

3.

During self-diagnosis mode, press CANCEL switch 5 times, and DISTANCE switch 5 times in this order.

CAUTION:

●

Press them within 10 seconds after pressing CANCEL switch at first.

●

When operation is not completed within 10 seconds, start again from above go to 2.

4.

DTC 55 will be shown.

CAUTION:

DTCs of an existing malfunction will not be erased.

5.

Turn ignition switch OFF to exit the diagnosis.

6.

Perform ICC system running test (drive vehicle with ICC system ON), and make sure that ICC system
warning lamp (orange) does not illuminate.

SELF-DIAGNOSIS BY CONSULT-II WILL NOT RUN

Possible Irregular Condition

1. 

CHECK CONSULT-II SYSTEM

●

Can CONSULT-II call other systems?

Yes or No

Yes

>> GO TO 2.

No

>> Check CONSULT-ll SYSTEM. Refer to 

GI-38, "CONSULT-II Data Link Connector (DLC) Circuit"

 .

PKIA2368E

Open or short lines

Trouble phenomenon

Malfunction causes

ICC unit power supply malfunction

No voltage supply from ignition switch

Ignition relay malfunctioned

Fuse blown

Harness open

Harness shorted

Ground cable not connected

Harness open

Harness shorted

ICC unit malfunction

ACS-66

[ICC]

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

2. 

CHECK POWER SUPPLY FOR ICC UNIT

●

Is ICC unit turned ON?

Yes or No

Yes

>> GO TO 3.

No

>> Check power supply system, and repair if necessary.

3. 

CHECK HARNESS FOR DATA LINK CONNECTOR

●

Is continuity between ICC unit and data link connector normal?

Yes or No

Yes

>> GO TO 4.

No

>> Harness repair

4. 

SELF-DIAGNOSIS CHECK

●

Disconnect ICC unit connector, and check terminals for bend and looseness. Securely connect it again.

●

Enter self-diagnosis mode?

Yes or No

Yes

>> Inspection is completed.

No

>> ICC unit replacement

SELF-DIAGNOSIS BY ICC SYSTEM DISPLAY WILL NOT RUN

Possible Irregular Condition

SKIA1239E

Open or short lines

Trouble phenomenon

Malfunction causes

ICC unit power supply malfunction

No voltage supply from ignition switch

Fuse blown

Harness open

Harness shorted

Ground cable not connected

Harness open

Harness shorted

ICC steering switch malfunction

No signal transmitted

Harness open

Harness shorted

Spiral cable open

Spiral cable shorted

Switch malfunction

CAN communication system malfunction

Signal not transmitted

Harness open

Harness shorted

CAN communication outside the stan-
dard

Combination meter system malfunction

Indication not possible

Indicator malfunction

Indicator segments disappear.

ICC unit malfunction

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

ACS-67

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1. 

CHECK ICC SYSTEM DISPLAY

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When ignition switch is ON, do all displays illuminate?

Yes or No

Yes

>> GO TO 2.

No

>> GO TO 5.

2. 

CHECK ICC STEERING SWITCH

●

Check ICC steering switch. Refer to 

ACS-101, "ICC Steering Switch"

 .

OK or NG

OK

>> GO TO 3.

NG

>> Replace ICC steering switch.

3. 

CHECK HARNESS BETWEEN ICC UNIT AND ICC STEERING SWITCH

●

Check harness and spiral cable between ICC unit and ICC steering switch for open or short circuit.

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace harness or spiral cable between ICC unit and ICC steering switch.

4. 

CHECK SELF-DIAGNOSIS

●

Disconnect connector of ICC unit, and check terminals for bend and looseness. Securely connect it again.

●

Enter self-diagnosis mode?

Yes or No

Yes

>> Inspection is completed.

No

>> GO TO 5.

5. 

CHECK POWER SUPPLY FOR ICC UNIT

●

Check ICC unit power supply, and repair if necessary.

●

When ignition switch is ON, do all displays illuminate?

Yes or No

Yes

>> Perform self-diagnosis again.

No

>> GO TO 6.

6. 

CHECK CONNECTOR FOR ICC UNIT

●

Disconnect connector of ICC unit, and check terminals for bend and looseness. Securely connect it again.

●

When ignition switch is ON, do all displays illuminate?

Yes or No

Yes

>> Perform self-diagnosis again.

No

>> GO TO 7.

7. 

CHECK CAN COMMUNICATION

●

Perform self-diagnosis with CONSULT-II, and check CAN communication system for malfunction.

OK or NG

OK

>> Replace combination meter.

NG

>> CAN communication inspection. Refer to 

ACS-70, "DTC 20 CAN COMM CIRCUIT"

 .

ACS-68

[ICC]

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS

PFP:00000

Diagnostic Trouble Code (DTC) Chart

AKS002QD

×

:Applicable

DTC 

No.

CONSULT-II screen terms

ICC 

system 

warn-

ing 

lamp

Fail-safe

Malfunctions detected where...

Refer-

ence 
page

Vehicle-

to-vehi-

cle dis-

tance 

control 

mode

Conven-

tional 
(fixed 

speed) 

cruise 

control 

mode

Brake 
assist 

(with pre-

view 

function)

11

CONTROL UNIT

×

×

×

×

●

ICC unit internal malfunction

ACS-70

20

CAN COMM CIRCUIT

×

×

×

×

●

ICC unit detected CAN communi-
cation malfunction.

ACS-70

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POWER SUPPLY CIR

×

×

×

×

●

ICC unit power supply voltage is 
excessively low. (less than 8V)

ACS-70

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POWER SUPPLY CIR2

×

×

×

×

●

ICC unit power supply voltage is 
excessively high.

ACS-70

41

VHCL SPEED SE CIRC

×

×

×

×

●

Wheel sensor malfunction.

●

VDC/TCS/ABS control unit mal-
function

●

AT vehicle speed sensor mal-
function

●

TCM malfunction

ACS-71

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THRTL POS SEN CIRC

×

×

×

×

●

Throttle position sensor harness 
is open or shorted.

●

Throttle position sensor input is 
HI or fixed to LO.

●

Closed throttle position switch is 
ON or stuck to OFF.

ACS-72

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ABS/TCS/VDC CIRC

×

×

×

×

●

ABS/TCS/VDC system malfunc-
tion

ACS-73

45

BRAKE SW/ STOP L SW

×

×

×

×

●

Brake and stop lamp switch har-
ness is open or shorted.

●

Brake and stop lamp switch is 
ON or stuck to OFF.

●

Brake and stop lamp switch is 
stuck to ON.

ACS-73

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OPERATION SW CIRC

×

×

×

●

ICC steering switch harness or 
spiral cable is open or shorted.

●

ICC steering switch malfunction

ACS-75

61

PRESS SEN CIRCUIT

×

×

×

×

●

Brake pressure sensor harness is 
open or shorted.

●

Brake pressure sensor malfunc-
tion

●

Brake pressure sensor input cir-
cuit malfunction

ACS-77

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BOOSTER SOL/V CIRCUIT

×

×

×

×

●

Solenoid harness is open or 
shorted.

●

Solenoid is open.

●

Solenoid drive circuit malfunction

ACS-77