Nissan Tiida C11. Manual - part 640

EC-1210

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ASCD INDICATOR

ASCD INDICATOR

Description

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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 ASCD switch is turned ON to indicated that ASCD system is ready for opera-
tion.
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.

Component Function Check

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1.

ASCD INDICATOR FUNCTION

Check ASCD indicator under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-1210, "Diagnosis Procedure"

.

Diagnosis Procedure

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1.

CHECK CAN COMMUNICATION LINE

Refer to 

LAN-33, "CAN Communication Signal Chart"

.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace.

2.

CHECK COMBINATION METER OPERATION

Refer to 

MWI-22, "CONSULT-III Function (METER/M&A)"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Check combination meter circuit. Refer to 

MWI-21, "Diagnosis Description"

.

3.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-55, "Intermittent Incident"

.

>> INSPECTION END

CONDITION

INDICATOR

• Ignition switch: ON

• ASCD switch: Pressed at the 

1st time 

→

at the 2nd time

Illuminated 

→

 Not illuminated

• ASCD switch: ON
• When vehicle speed: Between 40 km/h (25 

MPH) and 144 km/h (89 MPH)

• ASCD: Operating

Illuminated

• ASCD: Not operating

Not illuminated

COOLING FAN

EC-1211

< COMPONENT DIAGNOSIS >

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COOLING FAN

Description

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Cooling fan operates at each speed when the current flows in the cooling fan motor as follows.
Refer to 

EC-1097, "System Description"

 for cooling fan operation.

Component Function Check

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1.

CHECK COOLING FAN LOW SPEED FUNCTION

1.

Start engine and let it idle.

2.

Turn air conditioner switch and blower fan switch ON.

3.

Make sure that cooling fan operates at low speed.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Refer to 

EC-1211, "Diagnosis Procedure"

.

2.

CHECK COOLING FAN HIGH SPEED FUNCTION

1.

Turn ignition switch OFF.

2.

Turn air conditioner switch and blower fan switch OFF.

3.

Disconnect engine coolant temperature sensor harness connector.

4.

Connect 150

Ω

 resistor to engine coolant temperature sensor harness connector.

5.

Restart engine and make sure that cooling fan operates at higher speed than low speed.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Refer to 

EC-1211, "Diagnosis Procedure"

.

Diagnosis Procedure

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1.

CHECK CAN COMMUNICATION LINE

Refer to 

LAN-33, "CAN Communication Signal Chart"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace

2.

CHECK COOLING FAN RELAY POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R harness connector E44.

3.

Check the voltage between IPDM E/R harness connectors and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

DETECT MALFUNCTIONING PART

Check the following.
• 50A fusible link (letter J)
• Harness for open or short between IPDM E/R and battery 

>> Repair or replace malfunctioning part.

4.

CHECK COOLING FAN CIRCUIT FOR OPEN AND SHORT

1.

Disconnect cooling fan motor harness connector.

IPDM E/R

Ground

Voltage

Connector

Terminal

E44

22

Ground

Battery voltage

EC-1212

< COMPONENT DIAGNOSIS >

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COOLING FAN

2.

Disconnect IPDM E/R harness connectors E46 and E48.

3.

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

4.

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

5.

Check the continuity between cooling fan motor and ground harness connector.

6.

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

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check the following.
• Harness for open or short between cooling fan motor and IPDM E/R
• Harness for open or short between IPDM E/R and ground
• Harness for open or short between cooling fan motor and ground
• Resistor  E5

>> Repair or replace malfunctioning part.

6.

CHECK COOLING FAN MOTOR

Refer to 

EC-1212, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace cooling fan motor.

7.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-55, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace IPDM E/R.

NO

>> Repair or replace harness or connector.

Component Inspection

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1.

CHECK COOLING FAN MOTOR

1.

Turn ignition switch OFF.

2.

Disconnect cooling fan motor harness connector E3.

3.

Supply cooling fan motor terminal with battery voltage and check operation.

Cooling fan motor

IPDM E/R

Continuity

Connector

Terminal

Connector

Terminal

E3

1

E44

20

Existed

24

IPDM E/R

Ground

Continuity

Connector

Terminal

E46

39

Ground

Existed

E48

59

Cooling fan motor

Ground

Continuity

Connector

Terminal

E3

2

Ground

Existed

COOLING FAN

EC-1213

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Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace cooling fan motor.

Terminals

Operation

(+)

(–)

1 

2

Cooling fans operate