2011 INFINITI QX56 Factory Service Manual

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Page 2529 of 5598

INFINITI QX56 2011 Factory Service Manual
ICC BRAKE SWITCHEC-505
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4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 9

Page 2530 of 5598

INFINITI QX56 2011 Factory Service Manual
EC-506
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IGNITION SIGNAL
IGNITION SIGNAL
Component Function CheckINFOID:0000000006218011
1.INSPECTION START
Turn ignition switch OFF, and restart engine.
Does the engi

Page 2531 of 5598

INFINITI QX56 2011 Factory Service Manual
IGNITION SIGNALEC-507
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Is the inspection result normal?
YES >> GO TO 2.
NO >> Go to
EC-168, "
Diagnosis Procedure".
2.CHECK IGNITION

Page 2532 of 5598

INFINITI QX56 2011 Factory Service Manual
EC-508
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IGNITION SIGNAL
YES >> GO TO 6.
NO >> Repair open circuit or short to power in harness or connectors.
6.CHECK CONDENSER
Refer to EC-510, "
Component Inspecti

Page 2533 of 5598

INFINITI QX56 2011 Factory Service Manual
IGNITION SIGNALEC-509
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YES >> GO TO 10.
NO >> Repair open circuit or short to power in harness or connectors.
10.CHECK IGNITION COIL

Page 2534 of 5598

INFINITI QX56 2011 Factory Service Manual
EC-510
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IGNITION SIGNAL
3. Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
For the fuse number, refer to EC-114, "
Wiring Diagram".
For the fus

EC-510
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IGNITION SIGNAL
3. Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
For the fuse number, refer to EC-114, "
Wiring Diagram".
For the fuse arrangement, refer to PG-143, "
Fuse, Connector and Terminal Arrangement".
Do not use CONSULT-III to release fuel pressure , or fuel pressure applies again during the following
procedure.
4. Start engine.
5. After engine stalls, crank it 2 or 3 times to release all fuel pressure.
6. Turn ignition switch OFF.
7. Remove all ignition coil harness connectors to avoi d the electrical discharge from the ignition coils.
8. Remove ignition coil and spark plug of the cylinder to be checked.
9. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
10. Connect spark plug and harness connector to ignition coil.
11. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 - 0.66 in) between the edge of the spark plug and grounded metal
portion as shown in the figure.
12. Crank engine for approximately 3 seconds, and check whether
spark is generated between the spark plug and the grounded
metal portion.
CAUTION:
Never place the spark plug and the ignition coil within 50
cm (19.7 in) each other. Be careful not to get an electrical
shock while checking, becau se the electrical discharge
voltage becomes 20 kV or more.
It might damage the ignition coil if the gap of more than 17 mm (0.66 in) is made.
NOTE:
When the gap is less than 13 mm (0.52 in), a spark might be generated even if the coil is malfunc-
tioning.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace malfunctioning ignition coil with power transistor.
Component Inspection (Condenser)INFOID:0000000006218014
1.CHECK CONDENSER
1. Turn ignition switch OFF.
2. Disconnect condenser harness connector.
3. Check resistance between condenser terminals as per the following.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace condenser. Spark should be generated.
JMBIA0066GB
Terminals Resistance
1 and 2 Above 1 M Ω [at 25 °C (77 °F)]
Revision: 2010 May2011 QX56

Page 2535 of 5598

INFINITI QX56 2011 Factory Service Manual
INFORMATION DISPLAY (ASCD)EC-511
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INFORMATION DISPLAY (ASCD)
Component Function CheckINFOID:0000000006218015
1.CHECK INFORMATION DISP

Page 2536 of 5598

INFINITI QX56 2011 Factory Service Manual
EC-512
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LOW PRESSURE FUEL PUMP
LOW PRESSURE FUEL PUMP
Component Function CheckINFOID:0000000006218017
1.CHECK FUEL PUMP FUNCTION
1. Turn ignition switch ON.
2. Pinch

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