Nissan Quest E52. Instruction — part 551
EC-414
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
ASCD BRAKE SWITCH
ASCD BRAKE SWITCH
Component Function Check
INFOID:0000000009651271
1.
CHECK ASCD BRAKE SWITCH FUNCTION
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 the voltage between ECM harness connector terminals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
.
Diagnosis Procedure
INFOID:0000000009651272
1.
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 the voltage between ASCD brake switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect fuse block (J/B) harness connector.
3.
Check the continuity between ASCD brake switch harness connector and fuse block (J/B) harness con-
nector.
Is the inspection result normal?
Monitor item
Condition
Indication
BRAKE SW1
Brake pedal
Slightly depressed
OFF
Fully released
ON
ECM
Condition
Voltage
Connector
+
–
Terminal
Terminal
E16
126
(ASCD brake
switch signal)
128
Brake pedal
Slightly depressed
Approx. 0 V
Fully released
Battery voltage
ASCD brake switch
Ground
Voltage
Connector
Terminal
E109
1
Ground
Battery voltage
ASCD brake switch
Fuse block (J/B)
Continuity
Connector
Terminal
Connector
Terminal
E109
1
E103
4F
Existed
ASCD BRAKE SWITCH
EC-415
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
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G
H
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EC
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YES
>> Perform the trouble diagnosis for power supply circuit.
NO
>> Repair or replace error-detected parts.
3.
CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between ASCD brake switch harness connector and ECM harness connector.
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
4.
CHECK ASCD BRAKE SWITCH
Check ASCD brake switch. Refer to
EC-415, "Component Inspection (ASCD Brake Switch)"
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-42, "Intermittent Incident"
.
NO
>> Replace ASCD brake switch. Refer to
.
Component Inspection (ASCD Brake Switch)
INFOID:0000000009651273
1.
CHECK ASCD BRAKE SWITCH-I
1.
Turn ignition switch OFF.
2.
Disconnect ASCD brake switch harness connector.
3.
Check the continuity between ASCD brake switch terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
2.
CHECK ASCD BRAKE SWITCH-II
1.
Adjust ASCD brake switch installation. Refer to
BR-7, "Inspection and Adjustment"
.
2.
Check the continuity between ASCD brake switch terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace ASCD brake switch. Refer to
.
ASCD brake switch
ECM
Continuity
Connector
Terminal
Connector
Terminal
E109
2
E16
126
Existed
Terminals
Condition
Continuity
1 and 2
Brake pedal
Fully released
Existed
Slightly depressed
Not existed
Terminals
Condition
Continuity
1 and 2
Brake pedal
Fully released
Existed
Slightly depressed
Not existed
EC-416
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
ASCD INDICATOR
ASCD INDICATOR
Component Function Check
INFOID:0000000009651274
1.
CHECK ASCD INDICATOR FUNCTION
Check ASCD indicator under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
.
Diagnosis Procedure
INFOID:0000000009651275
1.
CHECK DTC
Check that DTC UXXXX is not displayed.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Perform trouble diagnosis for DTC UXXXX.
2.
CHECK COMBINATION METER FUNCTION
Check combination meter function. Refer to
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace malfunctioning part.
3.
CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to
GI-42, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace combination meter. Refer to
NO
>> Repair or replace error-detected parts.
ASCD INDICATOR
CONDITION
SPECIFICATION
CRUISE
• Ignition switch: ON
• MAIN switch: Pressed at the
1st time
→
at the 2nd time
ON
→
OFF
COOLING FAN
EC-417
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
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F
G
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EC
N
P
O
COOLING FAN
Component Function Check
INFOID:0000000009651276
1.
CHECK COOLING FAN FUNCTION
With CONSULT
1.
Turn ignition switch ON.
2.
Perform “COOLING FAN” in “ACTIVE TEST” mode with CONSULT.
3.
Check that cooling fan operates at each speed.
Without CONSULT
1.
Perform IPDM E/R auto active test and check cooling fan motors operation, refer to
.
2.
Check that cooling fan operates at each speed.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
.
Diagnosis Procedure
INFOID:0000000009651277
1.
CHECK COOLING FAN RELAY POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect cooling fan relays-2, -3.
3.
Turn ignition switch ON.
4.
Check the voltage between cooling fan relays-2, -3 harness connectors and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Perform the trouble diagnosis for power supply circuit.
2.
CHECK COOLING FAN RELAY OUTPUT SIGNAL CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect IPDM E/R harness connectors.
3.
Check the continuity between cooling fan relay-2, -3 harness connectors and IPDM E/R harness connec-
tor.
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
3.
CHECK COOLING FAN MOTOR POWER SUPPLY
Cooling fan relay
Ground
Voltage
Connector
Terminal
E57
(cooling fan relay-2)
2
Ground
Battery voltage
5
E59
(cooling fan relay-3)
2
5
Cooling fan relay
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
E57
(cooling fan relay-2)
1
E11
42
Existed
E59
(cooling fan relay-3)
1
E10
34
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