Infiniti M35/M45 Y50. Manual - part 728

ASCD INDICATOR

EC-1385

[VK45DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

Wiring Diagram

NBS005QQ

TBWT1507E

EC-1386

[VK45DE]

ASCD INDICATOR

Diagnostic Procedure

NBS005QR

1. 

CHECK OVERALL FUNCTION

Check ASCD indicator under the following conditions.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 2.

2. 

CHECK DTC

Check that DTC U1000 or U1001 is not displayed.
OK or NG

OK

>> GO TO 3.

NG

>> Perform trouble diagnosis for DTC U1000, U1001. Refer to 

EC-865, "DTC U1000, U1001 CAN

COMMUNICATION LINE"

 .

3. 

CHECK DTC WITH “UNIFIED METER AND A/C AMP.”

Refer to 

DI-31, "SELF-DIAG RESULTS"

 .

OK or NG

OK

>> GO TO 4.

NG

>> Go to 

DI-35, "DTC [B2202] Meter Communication Circuit"

 .

4. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-857, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

ASCD INDICATOR

CONDITION

SPECIFICATION

CRUISE LAMP

●

Ignition switch: ON

●

MAIN switch: Pressed at the 
1st time 

→

 at the 2nd time

ON 

→

 OFF

SET LAMP

●

MAIN switch: ON

●

Vehicle speed: Between 40 
km/h (25 MPH) and 144 km/h 
(89 MPH)

●

ASCD: Operating

ON

●

ASCD: Not operating

OFF

ELECTRICAL LOAD SIGNAL

EC-1387

[VK45DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

ELECTRICAL LOAD SIGNAL

PFP:25350

Description

NBS005QB

The electrical load signal (Headlamp switch signal, rear window defogger switch signal, heater fan switch sig-
nal, etc.) is transferred through the CAN communication line from BCM to ECM via IPDM E/R.

CONSULT-II Reference Value in Data Monitor Mode

NBS005QC

Specification data are reference values.

Diagnostic Procedure

NBS005QD

1. 

CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I

1.

Turn ignition switch ON.

2.

Connect CONSULT-II and select “DATA MONITOR” mode.

3.

Select “LOAD SIGNAL” and check indication under the following
conditions.

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 4.

2. 

CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II

Check “LOAD SIGNAL” indication under the following conditions.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 5.

MONITOR ITEM

CONDITION

SPECIFICATION

LOAD SIGNAL

●

Ignition switch: ON

Rear window defogger switch: ON
and/or
Lighting switch: 2ND position

ON

Rear window defogger switch and light-
ing switch: OFF

OFF

HEATER FAN SW

●

Engine: After warming up, idle 
the engine

Heater fan switch: ON

ON

Heater fan switch: OFF

OFF

Condition

Indication

Rear window defogger switch: ON

ON

Rear window defogger switch: OFF

OFF

PBIB0103E

Condition

Indication

Lighting switch: ON at 2nd position

ON

Lighting switch: OFF

OFF

PBIB0103E

EC-1388

[VK45DE]

ELECTRICAL LOAD SIGNAL

3. 

CHECK HEATER FAN SIGNAL CIRCUIT OVERALL FUNCTION

Select “HEATER FAN SW” and check indication under the following
conditions.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 6.

4. 

CHECK REAR WINDOW DEFOGGER SYSTEM

Refer to 

GW-71, "REAR WINDOW DEFOGGER"

 .

>> INSPECTION END

5. 

CHECK HEADLAMP SYSTEM

Refer to 

LT-42, "HEADLAMP (FOR USA) - XENON TYPE -"

 , 

LT-8, "HEADLAMP (FOR USA) - CONVEN-

TIONAL TYPE -"

  or 

LT-78, "HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYSTEM -"

 .

>> INSPECTION END

6. 

CHECK HEATER FAN CONTROL SYSTEM

Refer to 

ATC-40, "TROUBLE DIAGNOSIS"

 .

>> INSPECTION END

Condition

Indication

Heater fan control switch: ON

ON

Heater fan control switch: OFF

OFF

PBIB1995E