Nissan Frontier D40. Manual — part 420
ASCD BRAKE SWITCH
EC-371
< COMPONENT DIAGNOSIS >
[QR25DE]
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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 (No.12)
• Harness for open or short between ASCD brake switch and fuse
>> Repair open circuit, short to ground or short to power in harness or connectors.
5.
CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Check harness continuity between ASCD brake switch terminal 2 and ASCD clutch switch terminal 1.
Refer to Wiring Diagram.
3.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 6.
NG
>> Repair open circuit, short to ground or short to power in harness or connectors.
6.
CHECK ASCD BRAKE SWITCH
EC-329, "Component Inspection"
OK or NG
OK
>> GO TO 9.
NG
>> Replace ASCD brake switch.
7.
CHECK ASCD CLUTCH 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 clutch switch terminal 2.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
BBIA0560E
Voltage: Battery voltage
PBIB0857E
Continuity should exist.
Continuity should exist.
EC-372
< COMPONENT DIAGNOSIS >
[QR25DE]
ASCD BRAKE SWITCH
OK or NG
OK
>> GO TO 8.
NG
>> Repair open circuit, short to ground or short to power in harness or connectors.
8.
CHECK ASCD CLUTCH SWITCH
EC-329, "Component Inspection"
OK or NG
OK
>> GO TO 9.
NG
>> Replace ASCD clutch switch
9.
CHECK INTERMITTENT INCIDENT
GI-46, "Intermittent Incident"
>> INSPECTION END
Component Inspection
INFOID:0000000005273410
ASCD BRAKE SWITCH
1.
Turn ignition switch OFF.
2.
Disconnect ASCD brake switch harness connector.
3.
Check 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 continuity between ASCD clutch switch terminals 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.
Condition
Continuity
Brake pedal: Fully released
Should exist
Brake pedal: Slightly depressed
Should not exist
SEC023D
Condition
Continuity
Clutch pedal: Fully released
Should exist
Clutch pedal: Slightly depressed
Should not exist
SEC024D
ASCD INDICATOR
EC-373
< COMPONENT DIAGNOSIS >
[QR25DE]
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ASCD INDICATOR
Component Description
INFOID:0000000005273411
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 indicate 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 ASCD
setting.
SET indicator remains lit during ASCD control.
Refer to
for the ASCD function.
Diagnosis Procedure
INFOID:0000000005273412
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.
Yes or No
Yes
>> Perform trouble diagnoses for DTC UXXXX, refer to
No
>> GO TO 3.
3.
CHECK COMBINATION METER OPERATION
OK or NG
OK
>> GO TO 4.
NG
>> Go to
MWI-5, "METER SYSTEM : Arrangement of Combination Meter"
.
4.
CHECK 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 between
40 km/h (25 MPH) and 144 km/h (89 MPH)
ASCD: Operating
ON
ASCD: Not operating
OFF
EC-374
< COMPONENT DIAGNOSIS >
[QR25DE]
ELECTRICAL LOAD SIGNAL
ELECTRICAL LOAD SIGNAL
Description
INFOID:0000000005273413
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:0000000005273414
1.
CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II
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
>> INSPECTION END
NG
>> GO TO 2.
2.
CHECK HEADLAMP SYSTEM
.
>> INSPECTION END
Condition
Indication
Lighting switch: ON at 2nd position
ON
Lighting switch: OFF
OFF
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