Infiniti EX35. Manual - part 675

 

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Infiniti EX35. Manual - part 675

 

 

EC-442

< COMPONENT DIAGNOSIS >

[VQ35HR]

ASCD INDICATOR

ASCD INDICATOR

Description

INFOID:0000000003133622

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-56, "System Description"

 for the ASCD function.

Component Function Check

INFOID:0000000003133623

1.

CHECK ASCD INDICATOR FUNCTION

Check ASCD indicator under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-442, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000003133624

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-136, "Diagnosis Procedure"

.

2.

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

Refer to 

MWI-40, "CONSULT-III Function (METER/M&A)"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace malfunctioning part.

3.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-38, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace combination meter.

NO

>> Repair or replace malfunctioning part.

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-443

< COMPONENT DIAGNOSIS >

[VQ35HR]

C

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EC

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COOLING FAN

Description

INFOID:0000000003133625

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:0000000003133626

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.

Check 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-11, "Diagnosis

Description"

.

2.

Check that cooling fan operates.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-443, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000003133627

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

EC-444

< COMPONENT DIAGNOSIS >

[VQ35HR]

COOLING FAN

3.

CHECK IPDM E/R GROUND CIRCUIT

1.

Disconnect IPDM E/R harness connectors E5, E6.

2.

Check the continuity between IPDM E/R harness connector and ground.

3.

Also check harness for short to power.

Is the inspection result normal?

YES

>> GO TO 4.

NO

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

4.

CHECK COOLING FAN CONTROL SIGNAL CIRCUIT

1.

Disconnect IPDM E/R harness connector E9.

2.

Check the continuity between IPDM E/R harness connector and cooling fan control module harness con-
nector.

3.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 5.

NO

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

5.

CHECK COOLING FAN CONTROL MODULE OUTPUT SIGNAL CIRCUIT

1.

Reconnect all harness connectors disconnected.

2.

Disconnect cooling fan control module harness connectors E301, E302.

3.

Turn ignition switch ON.

4.

Check the voltage between cooling fan control module terminals and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace cooling fan control module.

6.

CHECK COOLING FAN MOTORS -1 AND -2

Refer to 

EC-445, "Component Inspection (Cooling Fan Motor)"

.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Replace cooling fan motor.

7.

CHECK COOLING FAN CONTROL MODULE POWER SUPPLY CIRCUIT-II

1.

Turn ignition switch OFF.

2.

Disconnect cooling fan relay harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between cooling fan relay harness connector and ground.

IPDM E/R

Ground

Continuity

Connector

Terminal

E5

12

Ground

Existed

E6

41

IPDM E/R

Cooling fan control module

Continuity

Connector

Terminal

Connector

Terminal

E9

97

E37

2

Existed

Cooling fan control module

Ground

Voltage

Terminal

4

Ground

Battery voltage

6

COOLING FAN

EC-445

< COMPONENT DIAGNOSIS >

[VQ35HR]

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O

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> GO TO 8.

8.

DETECT MALFUNCTIONING PART

Check the following.
• 10A fuse (No. 42)
• IPDM E/R harness connector E7
• 50A fusible link (letter F)
• Harness for open or short between cooling fan relay and fuse
• Harness for open or short between cooling fan relay and battery

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

9.

CHECK COOLING FAN CONTROL MODULE POWER SUPPLY CIRCUIT-III

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R harness connector E6.

3.

Check the continuity between cooling fan relay harness connector and IPDM E/R harness connector.

4.

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

5.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 10.

NO

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

10.

CHECK COOLING FAN RELAY

Refer to 

EC-446, "Component Inspection (Cooling Fan Relay)"

.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Replace cooling fan relay.

11.

CHECK INTERMITTENT INCIDENT

Perfor

GI-38, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace IPDM E/R.

NO

>> Repair or replace harness connectors.

Component Inspection (Cooling Fan Motor)

INFOID:0000000003133628

1.

CHECK COOLING FAN MOTOR

1.

Turn ignition switch OFF.

Cooling fan relay

Ground

Voltage

Connector

Terminal

E17

1

Ground

Battery voltage

3

Cooling fan relay

IPDM E/R

Continuity

Connector

Terminal

Connector

Terminal

E17

2

E6

42

Existed

Cooling fan relay

Cooling fan control module

Continuity

Connector

Terminal

Connector

Terminal

E17

5

E37

3

Existed

 

 

 

 

 

 

 

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