service indicator INFINITI FX35 2008 Service Manual

ASCD INDICATOREC-1145
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Wiring DiagramINFOID:0000000001327046
Diagnosis ProcedureINFOID:0000000001327047
1.CHECK OVERALL FUNCTION
Check ASCD indicator under the following conditions.
TBWM1366E
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EC-1146
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ASCD INDICATOR
OK or NG
OK >>
INSPECTION END
NG >> GO TO 2.
2.CHECK DTC
Check that DTC U1000 or U1001 is not displayed.
OK or NG
OK >> GO TO 3.
NG >> Perform trouble diagnosis for DTC U1000, U1001. Refer to EC-724
.
3.CHECK DTC WITH “UNIFIED METER AND A/C AMP.”
Refer to DI-27, "
CONSULT-III Function (METER/M&A)".
OK or NG
OK >> GO TO 4.
NG >> Go to DI-30, "
DTC [B2202] Meter Communication Circuit".
4.CHECK INTERMITTENT INCIDENT
Refer to EC-717
.
>> 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
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EC-1184
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SNOW MODE SWITCH
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2.CHECK SNOW MODE SWIT
ICH OVERALL FUNCTION-II
1. Turn ignition switch ON.
2. Start engine.
3. Check the snow indicator lamp under the following condition.
OK or NG
OK >> INSPECTION END
NG >> GO TO 7.
3.CHECK DTC WITH “UNIFIED METER AND A/C AMP.”
Refer to DI-27, "
CONSULT-III Function (METER/M&A)".
OK or NG
OK >> GO TO 4.
NG >> Go to DI-26
.
4.CHECK SNOW MODE SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect snow mode switch harness connector.
3. Turn ignition switch ON.
4. Check voltage between snow mode switch terminal 1 and ground with CONSULT-III or tester.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
 10A fuse
 Harness for open or short between snow mode switch and fuse.
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK SNOW MODE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect “unified meter and A/C amp.” harness connector.
3. Check harness continuity between snow mode switch terminal 4 and “unified meter and A/C amp.” termi-
nal 12. Refer to Wiring Diagram.
CONDITION INDICATION
Snow mode switch: ON ON
Snow mode switch: OFF OFF
CONDITION INDICATOR LAMP
Snow mode switch: ON Illuminated
Snow mode switch: OFF Not illuminated
Voltage: Battery voltage.
PBIB2562E
Continuity should exist.
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SNOW MODE SWITCHEC-1185
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4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. Refer to EC-723, "
Ground Inspection".
OK or NG
OK >> GO TO 8.
NG >> Repair or replace ground connections.
8.CHECK SNOW MODE INDICATOR LAMP GROUND CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between snow mode switch terminal 2 and ground. Refer to Wiring Diagram.
2. Also check harness for short to power.
OK or NG
OK >> GO TO 9.
NG >> Repair open circuit or short to power in harness or connectors.
9.CHECK SNOW MODE SWITCH
Refer to EC-1185, "
Component Inspection".
OK or NG
OK >> GO TO 10.
NG >> Replace snow mode switch.
10.CHECK INTERMITTENT INCIDENT
Refer to EC-717
.
>> INSPECTION END
Component InspectionINFOID:0000000001327081
SNOW MODE SWITCH
PBIB2195E
Continuity should exist.
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FRONT TIMING CHAIN CASEEM-55
< SERVICE INFORMATION > [VQ35DE]
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16. Remove collared O-ring from front timing chain case (left and
right side).
17. Remove rocker covers (right and left banks). Refer to EM-51, "
Component".
NOTE:
When only timing chain (primary) is removed, rocker cover does not need to be removed.
18. Obtain No. 1 cylinder at TDC of its compression stroke as follows: NOTE:
When timing chain is not removed/installed, this step is not required.
a. Rotate crankshaft pulley clockwise to align timing mark (grooved line without color) with timing indicator.
b. Make sure that intake and exhaust cam noses on No. 1 cylinder (engine front side of right bank) are located as shown in the fig-
ure.
 If not, turn crankshaft one revolution (360 degrees) and alignas shown in the figure.
NOTE:
When only timing chain (primary) is removed, rocker cover does
not need to be removed. To make sure that No. 1 cylinder is at
its compression TDC, remove front timing chain case first. Then
check mating marks on camshaft sprockets. Refer to EM-65,
"Removal and Installation".
19. Remove crankshaft pulley as follows:
a. Remove rear cover plate (2WD models) or star ter motor (AWD models) and set ring gear stopper (SST).
Refer to EM-30, "
Component (2WD Models)" (2WD models) or SC-8, "System Description" (AWD mod-
els).
b. Loosen crankshaft pulley bolt and locate bolt seating surface as 10 mm (0.39 in) from its original position.
CAUTION:
Do not remove crankshaft pulley bolt as it will be used as a
supporting point for suitable puller.
PBIC2631E
KBIA1717J
SEM418G
PBIC1103E
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EM-66
< SERVICE INFORMATION >[VQ35DE]
TIMING CHAIN
 Loosen mounting bolts in reverse order as shown in the figure.
 Use the seal cutter [SST: KV10111100 (J37228)] to cut liquid
gasket for removal.
CAUTION:
Shaft is internally jointed wi th camshaft sprocket (INT) cen-
ter hole. When removing, keep it horizontal until it is com-
pletely disconnected.
19. Remove collared O-ring from front timing chain case (left and right side).
20. Remove rocker covers (right and left). Refer to EM-51, "
Component".
21. Remove oil pans (lower and upper). Refer to EM-30, "
Component (2WD Models)".
22. Obtain No. 1 cylinder at TDC of its compression stroke as follows:
a. Rotate crankshaft pulley clockwise to align timing mark (grooved line without color) with timing indicator.
b. Make sure that intake and exhaust cam noses on No. 1 cylinder (engine front side of right bank) are located as shown in the fig-
ure.
 If not, turn crankshaft one revolution (360 degrees) and alignas shown in the figure.
23. Remove crankshaft pulley as follows:
a. Remove rear cover plate (2WD models) or starter motor (AWD models) and set the ring gear stopper (SST). Refer to EM-30, "
Component (2WD Models)" (2WD models) or SC-8, "System Description" (AWD
models).
SEM728G
PBIC2631E
KBIA1717J
SEM418G
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CAMSHAFTEM-85
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6. Remove valve lifter.
 Identify installation positions, and store them without mixing them up.
7. Remove timing chain tensioner (secondary) from cylinder head.  Remove timing chain tensioner (secondary) with its stopperpin attached.
NOTE:
Stopper pin was attached when timing chain (secondary) was
removed.
INSPECTION AFTER REMOVAL
Camshaft Runout
1. Put V-block on precise flat table, and support No. 2 and 4 jour- nals of camshaft.
CAUTION:
Do not support No. 1 journal (on the side of camshaft
sprocket) because it has a different diameter from the other
three locations.
2. Set a dial indicator vertically to No. 3 journal.
3. Turn camshaft to one direction with hands, and measure the camshaft runout on a dial indicator. (Total indicator reading)
4. If it exceeds the limit, replace camshaft.
Camshaft Cam Height
1. Measure the camshaft cam height with a micrometer.
2. If wear exceeds the limit, replace camshaft.
Camshaft Journa l Oil Clearance
CAMSHAFT JOURNAL DIAMETER
 Measure the outer diameter of camshaft journal with a micrometer.
PBIC2111E
Standard : Less than 0.02 mm (0.0008 in)
Limit : 0.05 mm (0.0020 in)PBIC0929E
Standard cam height (intake and exhaust)
: 44.865 - 45.055 mm (1.7663 - 1.7738 in)
Cam wear limit : 0.2 mm (0.008 in)
EMQ0072D
Standard:No. 1 : 25.935 - 25.955 mm (1.0211 - 1.0218 in)
No. 2, 3, 4 : 23.445 - 23.465 mm (0.9230 - 0.9238 in)
PBIC0040E
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EM-86
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CAMSHAFT
CAMSHAFT BRACKET INNER DIAMETER
 Tighten camshaft bracket bolt with the specified tor que. Refer to "INSTALLATION" for the tightening proce-
dure.
 Measure inner diameter “A” of camshaft bracket with a bore gauge.
CAMSHAFT JOURNA L OIL CLEARANCE (Oil clearance) = (Camshaft bracket inner diameter) – (Camshaft journal diameter).
 If the calculated value exceeds the limit, replace either or both camshaft and cylinder head.
NOTE:
Camshaft brackets cannot be replaced as single part s, because there are machined together with cylinder
head. Replace whole cylinder head assembly.
Camshaft End Play
 Install a dial indicator in thrust direction on front end of camshaft. Measure the end play of a dial indicator when camshaft is moved
forward/backward (in direction to axis).
 Measure the following parts if out of the limit.
- Dimension “A” for camshaft No. 1 journal
- Dimension “B” for cylinder head No. 1 journal bearing
 Refer to the standards above, and then replace camshaft and/or cylinder head.
Camshaft Sprocket Runout
1. Put V-block on precise flat table, and support No. 2 and 4 journals of camshaft. CAUTION:
Do not support No. 1 journal (on the side of cam shaft sprocket) because it has a different diameter
from the other three locations. Standard:
No. 1 : 26.000 - 26.021 mm (1.0236 - 1.0244 in)
No. 2, 3, 4 : 23.500 - 23.521 mm (0.9252 - 0.9260 in)
PBIC1645E
Standard:No. 1 : 0.045 - 0.086 mm (0.0018 - 0.0034 in)
No. 2, 3, 4 : 0.035 - 0.076 mm (0.0014 - 0.0030 in)
Limit : 0.15 mm (0.0059 in)
Standard : 0.115 - 0.188 mm (0.0045 - 0.0074 in)
Limit : 0.24 mm (0.0094 in)
SEM864E
Standard : 27.500 - 27.548 mm (1.0827 - 1.0846 in)
Standard : 27.360 - 27.385 mm (1.0772 - 1.0781 in)
KBIA2404J
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CAMSHAFTEM-87
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2. Measure the camshaft sprocket runout with a dial indicator.
(Total indicator reading)
 If it exceeds the limit, replace camshaft sprocket.
Valve Lifter
Check if surface of valve lifter has any wear or cracks.
 If anything above is found, replace valve lifter. Refer to EM-149,
"Standard and Limit".
Valve Lifter Clearance
VALVE LIFTER OUTER DIAMETER Measure the outer diameter at 1/2 height of valve lifter with a
micrometer since valve lifter is in barrel shape.
VALVE LIFTER HOLE DIAMETER Measure the inner diameter of va lve lifter hole of cylinder head with
an inside micrometer.
VALVE LIFTER CLEARANCE (Valve lifter clearance) = (Valve lifter hole diameter) – (Valve lifter outer diameter) Limit : 0.15 mm (0.0059 in)
PBIC0930E
KBIA0182E
Standard
Identification (stamped) mark “R” or “U” : 33.977 - 33.987 mm (1.3377 - 1.3381 in)
Identification (stamped) mark “V” : 33.980 - 33.990 mm (1.3378 - 1.3382 in)
JEM798G
Standard (Intake and exhaust): 34.000 - 34.016 mm (1.3386 - 1.3392 in)
SEM867E
StandardIdentification (stamped) mark “R” or “U” : 0.013 - 0.039 mm (0.0005 - 0.0015 in)
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EM-92
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CAMSHAFT
In cases of removing/installing or replacing camshaft and valve-
related parts, or of unusual engine conditions due to changes in
valve clearance (found malfunctions during stating, idling or causing
noise), perform inspection as follows:
1. Remove rocker covers (right and left bank). Refer to
EM-51, "
Component".
2. Measure the valve clearance as follows:
a. Set No. 1 cylinder at TDC of its compression stroke.  Rotate crankshaft pulley clockwise to align timing mark(grooved line without color) with timing indicator.
 Make sure that intake and exhaust cam nose on No. 1 cylinder (engine front side of right bank) are located as shown in the
figure.
 If not, turn crankshaft one revolution (360 degrees) and align as shown in the figure.
b. Use a feeler gauge, measure t he clearance between valve lifter
and camshaft.
Valve clearance:
Unit: mm (in)
*: Approximately 80°C (176 °F)
SEM713A
KBIA1717J
SEM418G
SEM139D
Items Cold Hot * (reference data)
Intake 0.26 - 0.34 (0.010 - 0.013) 0.304 - 0.416 (0.012 - 0.016)
Exhaust 0.29 - 0.37 (0.011 - 0.015) 0.308 - 0.432 (0.012 - 0.017)
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