Infiniti G35 (V35) Sedan. Manual - part 575

EC-446

< COMPONENT DIAGNOSIS >

[VQ35HR]

ASCD BRAKE SWITCH

14.

CHECK ASCD CLUTCH SWITCH

Refer to 

EC-446, "Component Inspection (ASCD Clutch Switch)"

.

Is the inspection result normal?

YES

>> GO TO 15.

NO

>> Replace ASCD clutch switch.

15.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection (ASCD Brake Switch)

INFOID:0000000000956851

1.

CHECK ASCD BRAKE SWITCH-I

1.

Turn ignition switch OFF.

2.

Disconnect ASCD brake switch harness connector.

3.

Check the continuity between ASCD brake switch terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK ASCD BRAKE SWITCH-II

1.

Adjust ASCD brake switch installation. Refer to 

BR-7, "Inspection and Adjustment"

.

2.

Check the continuity between ASCD brake switch terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace ASCD brake switch.

Component Inspection (ASCD Clutch Switch)

INFOID:0000000000956852

1.

CHECK ASCD CLUTCH SWITCH-I

1.

Turn ignition switch OFF.

2.

Disconnect ASCD clutch switch harness connector.

3.

Check the continuity between ASCD clutch switch terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK ASCD CLUTCH SWITCH-II

1.

Adjust ASCD clutch switch installation. Refer to 

CL-5, "Inspection and Adjustment"

.

2.

Check the continuity between ASCD clutch switch terminals under the following conditions.

Terminals

Condition

Continuity

1 and 2

Brake pedal

Fully released

Existed

Slightly depressed

Not existed

Terminals

Condition

Continuity

1 and 2

Brake pedal

Fully released

Existed

Slightly depressed

Not existed

Terminals

Condition

Continuity

1 and 2

Clutch pedal

Fully released

Existed

Slightly depressed

Not existed

ASCD BRAKE SWITCH

EC-447

< COMPONENT DIAGNOSIS >

[VQ35HR]

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Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace ASCD clutch switch.

Terminals

Condition

Continuity

1 and 2

Clutch pedal

Fully released

Existed

Slightly depressed

Not existed

EC-448

< COMPONENT DIAGNOSIS >

[VQ35HR]

ASCD INDICATOR

ASCD INDICATOR

Description

INFOID:0000000000956853

ASCD indicator lamp illuminates to indicate ASCD operation status. Lamp has two indicators, CRUISE and
SET, and is integrated in combination meter.
CRUISE lamp illuminates when MAIN switch on ASCD steering switch is turned ON to indicated that ASCD
system is ready for operation.
SET lamp illuminates when following conditions are met. 
• CRUISE lamp is illuminated.
• SET/COAST switch on ASCD steering switch is turned ON while vehicle speed is within the range of ASCD

setting.

SET lamp remains lit during ASCD control.
Refer to 

EC-57, "System Description"

 for the ASCD function.

Component Function Check

INFOID:0000000000956854

1.

CHECK ASCD INDICATOR FUNCTION

Check ASCD indicator under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-448, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000000956855

1.

CHECK DTC

Check that DTC U1000 or U1001 is not displayed.

Is the inspection result normal?

YES

>> GO TO 2.

NO

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

EC-137, "Diagnosis Procedure"

.

2.

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

Refer to 

MWI-37, "CONSULT-III Function (METER/M&A)"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace.

3.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace combination meter.

NO

>> Repair or replace.

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
• When vehicle speed is be-

tween 40 km/h (25 MPH) and 
144 km/h (89 MPH)

• ASCD: Operating

ON

• ASCD: Not operating

OFF

COOLING FAN

EC-449

< COMPONENT DIAGNOSIS >

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COOLING FAN

Description

INFOID:0000000000956856

COOLING FAN CONTROL MODULE

Cooling fan control module receives ON/OFF pulse duty signal from IPDM E/R. Corresponding to this ON/OFF
pulse duty signal, cooling fan control module sends cooling fan motor operating voltage to cooling fan motor.
The revolution speed of cooling fan motor is controlled by duty cycle of the voltage.

COOLING FAN MOTOR

Cooling fan motor receives cooling fan motor operating voltage from cooling fan control module. The revolu-
tion speed of cooling fan motor is controlled by duty cycle of the voltage.

Component Function Check

INFOID:0000000000956857

1.

CHECK COOLING FAN FUNCTION

 With CONSULT-III

1.

Turn ignition switch ON.

2.

Perform “FAN DUTY CONTROL” in “ACTIVE TEST” mode with CONSULT-III.

3.

Make sure that cooling fan speed varies according to the percent.

 Without CONSULT-III

1.

Perform IPDM E/R auto active test and check cooling fan motors operation, refer to 

PCS-10, "Diagnosis

Description"

.

2.

Make sure that cooling fan operates.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-449, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000000956858

1.

CHECK COOLING FAN CONTROL MODULE POWER SUPPLY CIRCUIT-I

1.

Turn ignition switch OFF.

2.

Disconnect cooling fan control module harness connector E37.

3.

Turn ignition switch ON.

4.

Check the voltage between cooling fan control module harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 7.

2.

CHECK COOLING FAN CONTROL MODULE GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check the continuity between cooling fan control module harness connector and ground.

3.

Also check harness for short to power.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair open circuit or short to power in harness or connectors.

Cooling fan control module

Ground

Voltage

Connector

Terminal

E37

3

Ground

Battery voltage

Cooling fan control module

Ground

Continuity

Connector

Terminal

E37

1

Ground

Existed