Nissan Pathfinder (2012 year). Manual — part 289
ASCD BRAKE SWITCH
EC-393
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
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ASCD BRAKE SWITCH
Component Description
INFOID:0000000007358359
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).
for the ASCD function.
Diagnosis Procedure
INFOID:0000000007358360
1.
CHECK OVERALL FUNCTION-I
With CONSULT
1. Turn ignition switch ON.
2. Select “BRAKE SW1” in “DATA MONITOR” mode with CONSULT.
3. Check “BRAKE SW1” indication under the following conditions.
Without CONSULT
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
Check “BRAKE SW2” indication in “DATA MONITOR” mode.
Without CONSULT
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
August 2012
2012 Pathfinder
EC-394
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
ASCD BRAKE SWITCH
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 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.
August 2012
2012 Pathfinder
ASCD BRAKE SWITCH
EC-395
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
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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
EC-396, "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 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
EC-396, "Component Inspection"
BBIA0560E
Voltage: Battery voltage
PBIB1184E
Continuity should exist.
August 2012
2012 Pathfinder
EC-396
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
ASCD BRAKE SWITCH
OK or NG
OK
>> GO TO 11.
NG
>> Replace stop lamp switch. Refer to
BR-23, "Removal and Installation"
.
11.
CHECK INTERMITTENT INCIDENT
GI-37, "Intermittent Incident"
>>
INSPECTION END
Component Inspection
INFOID:0000000007358361
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
"Inspection and Adjustment - Standard Pedal"
or
"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
"Inspection and Adjustment - Standard Pedal"
or
"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
August 2012
2012 Pathfinder
ASCD INDICATOR
EC-397
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
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ASCD INDICATOR
Component Description
INFOID:0000000007358362
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.
for the ASCD function.
Diagnosis Procedure
INFOID:0000000007358363
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
.
OK or NG
OK
>> GO TO 4.
NG
>> Go to .
4.
CHECK INTERMITTENT INCIDENT
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
August 2012
2012 Pathfinder
EC-398
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
COOLING FAN
COOLING FAN
Description
INFOID:0000000007358364
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:0000000007358365
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.
August 2012
2012 Pathfinder
COOLING FAN
EC-399
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
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4.
CHECK COOLING FAN MOTOR
EC-399, "Component Inspection"
OK or NG
OK
>> GO TO 5.
NG
>> Replace cooling fan motor. Refer to
CO-21, "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:0000000007358366
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-21, "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
August 2012
2012 Pathfinder
EC-400
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
ELECTRICAL LOAD SIGNAL
ELECTRICAL LOAD SIGNAL
Description
INFOID:0000000007358367
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:0000000007358368
1.
CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I
1. Turn ignition switch ON.
2. Connect CONSULT 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
>>
INSPECTION END
5.
CHECK HEADLAMP SYSTEM
>>
INSPECTION END
6.
CHECK HEATER FAN CONTROL SYSTEM
HAC-111, "Symptom Matrix Chart"
HAC-179, "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
August 2012
2012 Pathfinder
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