Nissan Frontier D40. Manual — part 540
ASCD BRAKE SWITCH
EC-851
< COMPONENT DIAGNOSIS >
[VQ40DE]
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3.
Check voltage between stop lamp switch terminal 2 and ground
with CONSULT -II or tester.
OK or NG
OK
>> GO TO 12.
NG
>> GO TO 11.
11.
DETECT MALFUNCTIONING PART
Check the following.
• Fuse block (J/B) connector E160
• 10 A fuse (No.20)
• 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.
12.
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 13.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
13.
CHECK STOP LAMP SWITCH
EC-851, "Component Inspection"
OK or NG
OK
>> GO TO 14.
NG
>> Replace stop lamp switch.
14.
CHECK INTERMITTENT INCIDENT
GI-46, "Intermittent Incident"
.
>> INSPECTION END
Component Inspection
INFOID:0000000005273868
ASCD BRAKE SWITCH
1.
Turn ignition switch OFF.
2.
Disconnect ASCD brake switch harness connector.
Voltage: Battery voltage
MBIB1407E
Continuity should exist.
EC-852
< COMPONENT DIAGNOSIS >
[VQ40DE]
ASCD BRAKE SWITCH
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
, and perform step 3 again.
ASCD CLUTCH SWITCH
1.
Turn ignition switch OFF.
2.
Disconnect ASCD clutch switch harness connector.
3.
Check harness continuity between ASCD clutch switch termi-
nals 1 and 2 under the following conditions.
If NG, adjust ASCD clutch switch installation, refer to
Vehicle Inspection and Adjustment"
, 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
, 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
Clutch pedal: Fully released
Should exist
Clutch pedal: Slightly depressed
Should not exist
SEC024D
Condition
Continuity
When brake pedal: Fully released.
Should not exist.
When brake pedal: Slightly depressed.
Should exist.
PBIB1185E
ASCD INDICATOR
EC-853
< COMPONENT DIAGNOSIS >
[VQ40DE]
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ASCD INDICATOR
Component Description
INFOID:0000000005273869
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
Diagnosis Procedure
INFOID:0000000005273870
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
MWI-4, "METER SYSTEM : System Diagram"
.
4.
CHECK INTERMITTENT INCIDENT
GI-46, "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
EC-854
< COMPONENT DIAGNOSIS >
[VQ40DE]
COOLING FAN
COOLING FAN
Description
INFOID:0000000005273871
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:0000000005273872
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.
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