Nissan Pathfinder (2011 year). Manual - part 292

EC-390

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

ASCD BRAKE SWITCH

ASCD BRAKE SWITCH

Component Description

INFOID:0000000006244144

When the brake pedal is depressed, ASCD brake switch is turned

OFF and stop lamp switch is turned ON. ECM detects the state of

the brake pedal by two types of input (ON/OFF signal).

Refer to 

EC-53, "System Description"

 for the ASCD function.

Diagnosis Procedure

INFOID:0000000006244145

1.

CHECK OVERALL FUNCTION-I

 With CONSULT-III

1. Turn ignition switch ON.

2. Select “BRAKE SW1” in “DATA MONITOR” mode with CONSULT-III.

3. Check “BRAKE SW1” indication under the following conditions.

 Without CONSULT-III

1. Turn ignition switch ON.

2. Check voltage between ECM terminal 108 and ground under the

following conditions.

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 3.

2.

CHECK OVERALL FUNCTION-II

 With CONSULT-III

Check “BRAKE SW2” indication in “DATA MONITOR” mode. 

 Without CONSULT-III

Check voltage between ECM terminal 101 and ground under the following conditions.

BBIA0560E

CONDITION

INDICATION

When brake pedal: Slightly depressed

OFF

When brake pedal: Fully released

ON

CONDITION

VOLTAGE

When brake pedal: Slightly depressed

Approximately 0V

When brake pedal: Fully released

Battery voltage

MBIB0061E

CONDITION

INDICATION

When brake pedal: Fully released

OFF

When brake pedal: Slightly depressed

ON

2011 Pathfinder

ASCD BRAKE SWITCH

EC-391

< DTC/CIRCUIT DIAGNOSIS >

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OK or NG

OK

>>

INSPECTION END

NG

>> GO TO 7.

3.

CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ASCD brake switch harness connector.

3. Turn ignition switch ON.

4. Check voltage between ASCD brake switch terminal 1 and

ground with CONSULT-III or tester.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

Check the following.

• Fuse block (J/B) connector E160

• 10A fuse

• Harness for open or short between ASCD brake switch and fuse

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

5.

CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check harness continuity between ECM terminal 108 and ASCD brake switch terminal 2.

Refer to Wiring Diagram.

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

CONDITION

VOLTAGE

When brake pedal: Fully released

Approximately 0V

When brake pedal: Slightly depressed

Battery voltage

MBIB0060E

BBIA0560E

Voltage: Battery voltage

PBIB0857E

Continuity should exist.

2011 Pathfinder

EC-392

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

ASCD BRAKE SWITCH

OK or NG

OK

>> GO TO 6.

NG

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

6.

CHECK ASCD BRAKE SWITCH

Refer to 

EC-393, "Component Inspection"

.

OK or NG

OK

>> GO TO 11.

NG

>> Replace ASCD brake switch. Refer to 

BR-23, "Removal and Installation"

.

7.

CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect stop lamp switch harness connector.

3. Check voltage between stop lamp switch terminal 1 and ground

with CONSULT -II or tester.

OK or NG

OK

>> GO TO 9.

NG

>> GO TO 8.

8.

DETECT MALFUNCTIONING PART

Check the following.

• Fuse block (J/B) connector E160

• 10A fuse

• Harness for open or short between stop lamp switch and battery

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

9.

CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Disconnect ECM harness connector.

2. Check harness continuity between ECM terminal 101 and stop lamp switch terminal 2.

Refer to Wiring Diagram.

3. Also check harness for short to ground and short to power.
OK or NG

OK

>> GO TO 10.

NG

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

10.

CHECK STOP LAMP SWITCH

Refer to 

EC-393, "Component Inspection"

.

BBIA0560E

Voltage: Battery voltage

PBIB1184E

Continuity should exist.

2011 Pathfinder

ASCD BRAKE SWITCH

EC-393

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OK or NG

OK

>> GO TO 11.

NG

>> Replace stop lamp switch. Refer to 

BR-23, "Removal and Installation"

.

11.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-37, "Intermittent Incident"

.

>>

INSPECTION END

Component Inspection

INFOID:0000000006244146

ASCD BRAKE SWITCH

1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch harness connector.
3. Check harness continuity between ASCD brake switch terminals

1 and 2 under the following conditions.

If NG, adjust ASCD brake switch installation, refer to 

BR-17,

"Inspection and Adjustment - Standard Pedal"

 or 

BR-18,

"Inspection and Adjustment - Adjustable Pedal"

 and perform

step 3 again.

STOP LAMP SWITCH 

1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check harness continuity between stop lamp switch terminals 1

and 2 under the following conditions.

If NG, adjust stop lamp switch installation, refer to 

BR-17,

"Inspection and Adjustment - Standard Pedal"

 or 

BR-18,

"Inspection and Adjustment - Adjustable Pedal"

, and perform

step 3 again.

Condition

Continuity

When brake pedal: Fully released.

Should exist.

When brake pedal: Slightly depressed.

Should not exist.

SEC023D

Condition

Continuity

When brake pedal: Fully released.

Should not exist.

When brake pedal: Slightly depressed.

Should exist.

PBIB1185E

2011 Pathfinder

EC-394

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

ASCD INDICATOR

ASCD INDICATOR

Component Description

INFOID:0000000006244147

ASCD indicator lamp illuminates to indicate ASCD operation status. Lamp has two indicators, CRUISE and

SET, and is integrated in combination meter.

CRUISE indicator illuminates when MAIN switch on ASCD steering switch is turned ON to indicated that

ASCD system is ready for operation.

SET indicator illuminates when the following conditions are met. 

• CRUISE indicator is illuminated.

• SET/COAST switch on ASCD steering switch is turned ON while vehicle speed is within the range of the

ASCD setting.

SET indicator remains lit during ASCD control.

Refer to 

EC-53, "System Description"

 for the ASCD function.

Diagnosis Procedure

INFOID:0000000006244148

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 UXXXX is not displayed.
OK or NG

OK

>> GO TO 3.

NG

>> Perform trouble diagnoses for DTC UXXXX.

3.

CHECK COMBINATION METER FUNCTION

Refer to 

MWI-4, "Work Flow"

.

OK or NG

OK

>> GO TO 4.

NG

>> Go to .

4.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-37, "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
• When vehicle speed is be-

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

ASCD: Operating

ON

ASCD: Not operating

OFF

2011 Pathfinder

COOLING FAN

EC-395

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

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COOLING FAN

Description

INFOID:0000000006244149

COMPONENT DESCRIPTION

Cooling Fan Motor

The cooling fan operates at each speed when the current flows in the cooling fan motor as follows.

Diagnosis Procedure

INFOID:0000000006244150

1.

CHECK IPDM E/R GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect IPDM E/R harness connectors E122, E124.

3. Check harness continuity between IPDM E/R terminals 38, 59 and ground.

Refer to Wiring Diagram.

4. Also check harness for short to power.
OK or NG

OK

>> GO TO 2.

NG

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

2.

CHECK COOLING FAN MOTOR CIRCUIT FOR OPEN AND SHORT

1. Disconnect cooling fan motor harness connector.

2. Check harness continuity between the following;

cooling fan motor terminal 1 and IPDM E/R terminal 20,

cooling fan motor terminal 2 and IPDM E/R terminal 24.

Refer to Wiring Diagram.

3. Also check harness for short to ground and short to power.
OK or NG

OK

>> GO TO 3.

NG

>> Repair open circuit or short to ground or short to power

in harness or connectors.

3.

CHECK COOLING FAN MOTER GROUND CIRCUIT FOR OPEN OR SHORT

1. Check harness continuity between the following;

cooling fan motor terminal 3 and ground,

cooling fan motor terminal 4 and ground.

Refer to Wiring Diagram.

2. Also check harness for short to power.
OK or NG

OK

>> GO TO 4.

NG

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

Cooling fan speed

Cooling fan motor terminals

(+)

(

−

)

Low (LOW)

1

3 and 4

2

3 and 4

High (HI)

1 and 2

3 and 4

Continuity should exist.

Continuity should exist.

BBIA0555E

Continuity should exist.

2011 Pathfinder

EC-396

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

COOLING FAN

4.

CHECK COOLING FAN MOTOR

Refer to 

EC-396, "Component Inspection"

.

OK or NG

OK

>> GO TO 5.

NG

>> Replace cooling fan motor. Refer to 

CO-22, "Removal and Installation (Motor driven type)"

.

5.

CHECK INTERMITTENT INCIDENT

Perform 

GI-37, "Intermittent Incident"

.

OK or NG

OK

>> INSPETION END

NG

>> Repair or replace harness or connector. 

Component Inspection

INFOID:0000000006244151

COOLING FAN MOTOR

1. Disconnect cooling fan motor harness connectors.
2. Supply cooling fan motor terminals with battery voltage and

check operation.

Cooling fan motor should operate.

If NG, replace cooling fan motor. Refer to 

CO-22, "Removal and Installation (Motor driven type)"

.

Cooling fan speed

Cooling fan motor terminals

(+)

(

−

)

Low

1

3 and 4

2

3 and 4

High

1 and 2

3 and 4

SEF734W

2011 Pathfinder

ELECTRICAL LOAD SIGNAL

EC-397

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

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ELECTRICAL LOAD SIGNAL

Description

INFOID:0000000006244152

The electrical load signal (Headlamp switch signal, etc.) is transferred through the CAN communication line

from BCM to ECM via IPDM E/R.

Diagnosis Procedure

INFOID:0000000006244153

1.

CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I

1. Turn ignition switch ON.

2. Connect CONSULT-III 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.

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 

DEF-3, "Repair Work Flow"

.

>>

INSPECTION END

5.

CHECK HEADLAMP SYSTEM

Refer to 

EXL-4, "Work Flow"

.

>>

INSPECTION END

6.

CHECK HEATER FAN CONTROL SYSTEM

Refer to 

HAC-111, "Symptom Matrix Chart"

 or 

HAC-178, "Symptom Matrix Chart"

.

Condition

Indication

Rear window defogger switch: ON

ON

Rear window defogger switch: OFF

OFF

Condition

Indication

Lighting switch: ON at 2nd position

ON

Lighting switch: OFF

OFF

Condition

Indication

Heater fan control switch: ON

ON

Heater fan control switch: OFF

OFF

2011 Pathfinder