Infiniti QX56 (Z62). Manual — part 631
EC-502
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
HIGH PRESSURE FUEL PUMP
4.
Also check harness for short to ground and to power.
Is inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace error-detected parts.
2.
CHECK HIGH PRESSURE FUEL PUMP SOLENOID
EC-502, "Component Inspection"
Is inspection result normal?
YES
>> GO TO 3.
NO
>> Replace high pressure fuel pump. Refer to
EM-43, "Removal and Installation"
.
3.
CHECK HIGH PRESSURE FUEL PUMP INSTALLATION CONDITION
1.
Turn ignition switch OFF.
2.
Check that the high pressure fuel pump is installed with no backlash and looseness.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace error-detected parts.
4.
CHECK CAMSHAFT
1.
Remove camshaft. Refer to
EM-75, "Removal and Installation"
.
2.
Check camshaft. Refer to
Is inspection result normal?
YES
>> INSPECTION END
NO
>> Replace camshaft. Refer to
EM-75, "Removal and Installation"
.
Component Inspection
INFOID:0000000006218007
1.
CHECK HIGH PRESSURE FUEL PUMP SOLENOID
1.
Turn ignition switch OFF.
2.
Disconnect high pressure fuel pump harness connector.
3.
Check the resistance between high pressure fuel pump connector terminals as per the following.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace high pressure fuel pump. Refer to
EM-43, "Removal and Installation"
.
+
−
Condition
Resistance
High pressure fuel pump
Terminal
1
2
Temperature
20 – 30
°
C (68 – 86
°
F)
9 – 11
Ω
ICC BRAKE SWITCH
EC-503
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
C
D
E
F
G
H
I
J
K
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M
A
EC
N
P
O
ICC BRAKE SWITCH
Component Function Check
INFOID:0000000006218008
1.
CHECK ICC BRAKE SWITCH FUNCTION
WITH CONSULT-III
1.
Turn ignition switch ON.
2.
Select “BRAKE SW1” in “DATA MONITOR” mode with CONSULT-III.
3.
Check “BRAKE SW1” indication under the following conditions.
WITHOUT CONSULT-III
1.
Turn ignition switch ON.
2.
Check the voltage between ECM harness connector terminals as per the following.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000006218009
1.
CHECK DTC WITH ADAS CONTROL UNIT
DAS-21, "CONSULT-III Function (ICC/ADAS)"
Are any DTCs detected?
YES
>> Perform the Diagnosis Procedure corresponding to the detected DTC.
NO
>> GO TO 2.
2.
CHECK OVERALL FUNCTION
WITH CONSULT-III
1.
Turn ignition switch ON.
2.
Select “BRAKE SW1” in “DATA MONITOR” mode with CONSULT-III.
3.
Check “BRAKE SW1” indication under the following conditions.
WITHOUT CONSULT-III
1.
Turn ignition switch ON.
2.
Check the voltage between ECM harness connector terminals under the following conditions.
Monitor item
Condition
Indication
BRAKE SW1
(ICC brake switch)
Brake pedal
Slightly depressed
OFF
Fully released
ON
ECM
Condition
Voltage
Connector
+
–
Terminal
Terminal
E80
147
(ICC brake switch signal)
175
Brake pedal
Slightly depressed
Approx. 0 V
Fully released
Battery voltage
Monitor item
Condition
Indication
BRAKE SW1
(ICC brake switch)
Brake pedal
Slightly depressed
OFF
Fully released
ON
EC-504
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
ICC BRAKE SWITCH
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 3.
3.
CHECK ICC BRAKE SWITCH POWER SUPPLY CIRCUIT-I
1.
Turn ignition switch OFF.
2.
Disconnect ICC brake switch harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between ICC brake switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> GO TO 4.
4.
CHECK ICC BRAKE SWITCH POWER SUPPLY CIRCUIT-II
Check the voltage between ICC brake switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART
Check the following.
• Fuse block (J/B) connector E103
• 10 A fuse (No. 3)
• Harness for open or short between ICC brake switch and fuse
>> Repair open circuit or short to ground in harness or connectors.
6.
CHECK ICC BRAKE SWITCH
EC-445, "Component Inspection (ICC Brake Switch)"
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Replace ICC brake switch. Refer to
BR-20, "Removal and Installation"
7.
CHECK ICC BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between ICC brake switch harness connector and ECM harness connector.
ECM
Condition
Voltage (V)
Connector
+
–
Terminal
Terminal
E80
147
(ICC brake switch signal)
175
Brake pedal
Slightly depressed
Approx. 0
Fully released
Battery voltage
ICC brake switch
Ground
Voltage
Connector
Terminal
E68
2
Ground
Battery voltage
ICC brake switch
Ground
Voltage
Connector
Terminal
E68
1
Ground
Battery voltage
ICC BRAKE SWITCH
EC-505
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
C
D
E
F
G
H
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J
K
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M
A
EC
N
P
O
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> GO TO 8.
8.
DETECT MALFUNCTIONING PART
Check the following.
• Harness for open or short between ICC brake switch and ECM
• Loose or poor connection for each connector and harness
>> Repair open circuit, short to ground or short to power in harness or connectors.
9.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
.
>> INSPECTION END
Component Inspection (ICC Brake Switch)
INFOID:0000000006218010
1.
CHECK ICC BRAKE SWITCH-I
1.
Turn ignition switch OFF.
2.
Disconnect ICC brake switch harness connector.
3.
Check the continuity between ICC brake switch terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
2.
CHECK ICC BRAKE SWITCH-II
1.
Adjust ICC brake switch installation. Refer to
BR-21, "Inspection and Adjustment"
.
2.
Check the continuity between ICC brake switch terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace ICC brake switch. Refer to
BR-20, "Removal and Installation"
ICC brake switch
ECM
Continuity
Connector
Terminal
Connector
Terminal
E68
2
E80
147
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
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