Nissan Frontier. Instruction — part 692
ASCD BRAKE SWITCH
EC-1339
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR MEXICO]
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6.
CHECK BRAKE PEDAL POSITION SWITCH
EC-1340, "Component Inspection"
.
OK or NG
OK
>> GO TO 11.
NG
>> Replace brake pedal position switch. Refer to
7.
CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch (2) harness connector.
-
Brake pedal position switch (1)
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
• 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.
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-1340, "Component Inspection"
.
OK or NG
OK
>> GO TO 11.
NG
>> Replace stop lamp switch. Refer to
.
MBIB1214E
Voltage: Battery voltage
PBIB1184E
Continuity should exist.
EC-1340
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR MEXICO]
ASCD BRAKE SWITCH
11.
CHECK INTERMITTENT INCIDENT
GI-42, "Intermittent Incident"
>> INSPECTION END
Component Inspection
INFOID:0000000009482023
BRAKE PEDAL POSITION SWITCH
1. Turn ignition switch OFF.
2. Disconnect brake pedal position switch harness connector.
3. Check harness continuity between brake pedal position termi-
nals 1 and 2 under the following conditions.
If NG, adjust brake pedal position switch installation, refer to
16, "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
When brake pedal: Fully released.
Should not exist.
When brake pedal: Slightly depressed.
Should exist.
PBIB1185E
ASCD INDICATOR
EC-1341
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR MEXICO]
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ASCD INDICATOR
Component Description
INFOID:0000000009482024
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.
Diagnosis Procedure
INFOID:0000000009482025
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-5, "METER SYSTEM : System Diagram"
.
4.
CHECK INTERMITTENT INCIDENT
GI-42, "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-1342
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR MEXICO]
COOLING FAN
COOLING FAN
Description
INFOID:0000000009482026
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:0000000009482027
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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