Cooling INFINITI QX56 2011 Factory Workshop Manual
[x] Cancel search | Manufacturer: INFINITI, Model Year: 2011, Model line: QX56, Model: INFINITI QX56 2011Pages: 5598, PDF Size: 94.53 MB
Page 2396 of 5598
![INFINITI QX56 2011 Factory Workshop Manual
EC-372
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P0550 PSP SENSOR
Is inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect EC](/img/42/57033/w960_57033-2395.png "INFINITI QX56 2011 Factory Workshop Manual
EC-372
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P0550 PSP SENSOR
Is inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect EC")
EC-372
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P0550 PSP SENSOR
Is inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness connector for short to power and short to ground, between the following terminals.
Is inspection result normal?
YES >> Perform the trouble diagnosis for power supply circuit. Refer to EC-168, "Diagnosis Procedure".
NO >> Repair or replace error-detected parts.
4.CHECK PSP SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between PSP sens or 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 5.
NO >> Repair or replace error-detected parts.
5.CHECK ECM GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between ECM harness connector and the ground.
Is inspection result normal?
YES >> Check intermittent incident. Refer to GI-40, "Intermittent Incident".
+
−Voltag e
(Approx.)
PSP sensor
Connector terminal F35 1 Ground 5 V
ECM Sensor
Connector Terminal Name Connector Terminal
F 111 27Low fuel pressure sensor F25 3
Power steering pressure sensor F35 1
Cooling fan speed sensor F39 2
28 FRP sensor F26 1
+ −
Continuity
PSP sensor ECM
Connector Terminal Connector Terminal F35 3 F111 45 Existed
+ −Continuity
ECM
Connector Terminal F 111 1 0 Ground Existed
E80 174
175
Revision: 2010 May2011 QX56
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![INFINITI QX56 2011 Factory Workshop Manual
EC-400
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P1217 ENGINE OVER TEMPERATURE
P1217 ENGINE OVER TEMPERATURE
DTC LogicINFOID:0000000006217909
DTC DETECTION LOGIC
NOTE:
If DTC P1217 is displayed with DTC UX](/img/42/57033/w960_57033-2423.png "INFINITI QX56 2011 Factory Workshop Manual
EC-400
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P1217 ENGINE OVER TEMPERATURE
P1217 ENGINE OVER TEMPERATURE
DTC LogicINFOID:0000000006217909
DTC DETECTION LOGIC
NOTE:
If DTC P1217 is displayed with DTC UX")
EC-400
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P1217 ENGINE OVER TEMPERATURE
P1217 ENGINE OVER TEMPERATURE
DTC LogicINFOID:0000000006217909
DTC DETECTION LOGIC
NOTE:
If DTC P1217 is displayed with DTC UXXXX, perform the trouble diagnosis for DTC UXXXX.
If DTC P1217 is displayed with DTC P0607, perfo rm the trouble diagnosis for DTC P0607. Refer to
EC-378, "
DTC Logic".
If DTC P1217 is displayed with DTC P0527, perfo rm the trouble diagnosis for DTC P0527. Refer to
EC-367, "
DTC Logic".
If the cooling fan or any of other components in the cooling system has a malfunction, engine coolant temper-
ature increases.
When the engine coolant temperature reaches an abnorma lly high temperature condition, a malfunction is
indicated.
CAUTION:
When a malfunction is indicated, al ways replace the coolant. Refer to CO-8, "
Draining" and CO-9,
"Refilling". Also, replace the engine oil. Refer to LU-8, "Draining" and LU-8, "Refilling".
1. Fill radiator with coolant up to specified level with a filling speed of 2 liters per minute. Always use
coolant with the proper mixture ratio. Refer to MA-11, "
Anti-Freeze Coolant Mixture Ratio".
2. After refilling coolant, run engine to en sure that no water-flow noise is emitted.
DTC CONFIRMATION PROCEDURE
1.PERFORM COMPONENT FUNCTION CHECK
Perform component function check. Refer to EC-400, "
Component Function Check".
NOTE:
Use component function check to check the overall functi on of the cooling fan. During this check, a DTC might
not be confirmed.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-401, "
Diagnosis Procedure".
Component Function CheckINFOID:0000000006217910
1.PERFORM COMPONENT FUNCTION CHECK-I
WARNING:
Never remove the reservoir tank cap when the engi ne is hot. Serious burns could be caused by high
pressure fluid escaping from the radiator.
Wrap a thick cloth around cap. Carefully remove the cap by turning it a quarter turn to allow built-up
pressure to escape. Then turn the cap all the way off.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1217 Engine over temperature
(Overheat) Cooling fan does not operate properly
(Overheat).
Cooling fan system does not operate properly (Overheat).
Engine coolant is not within the specified quantity. Harness or connectors
(The cooling fan circuit is open or shorted.)
IPDM E/R
Electrically-controlled cooling fan coupling
Cooling fan speed sensor
Radiator hose
Radiator
Reservoir tank cap
Water pump
Thermostat
Revision: 2010 May2011 QX56
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![INFINITI QX56 2011 Factory Workshop Manual
P1217 ENGINE OVER TEMPERATUREEC-401
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
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F
G H
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M A
EC
NP
O
Check the coolant level in the reservoir tank and radiator.
Allow engine to cool befo
re checkin](/img/42/57033/w960_57033-2424.png "INFINITI QX56 2011 Factory Workshop Manual
P1217 ENGINE OVER TEMPERATUREEC-401
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
I
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K L
M A
EC
NP
O
Check the coolant level in the reservoir tank and radiator.
Allow engine to cool befo
re checkin")
P1217 ENGINE OVER TEMPERATUREEC-401
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
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F
G H
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M A
EC
NP
O
Check the coolant level in the reservoir tank and radiator.
Allow engine to cool befo
re checking coolant level.
Is the coolant level in the reservoir tank and/or radiator below the
proper range?
YES >> Proceed to EC-401, "Diagnosis Procedure".
NO >> GO TO 2.
2.PERFORM COMPONENT FUNCTION CHECK-II
Confirm whether customer filled the coolant or not.
Did customer fill the coolant?
YES >> Proceed to EC-401, "Diagnosis Procedure".
NO >> GO TO 3.
3.PERFORM COMPONENT FUNCTION CHECK-III
WITH CONSULT-III
1. Start the engine.
2. Perform “FAN DUTY CONTROL” in “ACTIVE TEST” mode with CONSULT-III.
3. Check that cooling fan speed varies according to the percentage. NOTE:
Fan speed changes as the percentage changes.
WITHOUT CONSULT-III
1. Start the engine.
2. Perform IPDM E/R auto active test. Refer to PCS-10, "
Diagnosis Description".
3. Check that cooling fan speed increase. NOTE:
Speed changes gradually when performing the auto active test.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Proceed to EC-401, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006217911
1.CHECK COOLING FAN OPERATION
WITH CONSULT-III
1. Start the engine.
2. Perform “FAN DUTY CONTROL” in “ACTIVE TEST” mode with CONSULT-III.
3. Check that cooling fan speed varies according to the percentage. NOTE:
Speed changes gradually as the percentage changes.
WITHOUT CONSULT-III
1. Stert the engine.
2. Perform IPDM E/R auto active test and check cooling fan operation, refer to PCS-10, "
Diagnosis Descrip-
tion".
3. Check that cooling fan speed increase.
NOTE:
Speed changes gradually when performing the auto active test.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Proceed to EC-495, "
Diagnosis Procedure".
2.CHECK ENGINE COOLANT LEAKAGE-I
Check cooling system for leakage. Refer to CO-8, "
Inspection".
Is leakage detected?
SEF621W
Revision: 2010 May2011 QX56
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![INFINITI QX56 2011 Factory Workshop Manual
P2539, P2541, P2542 LOW FUEL PRESSURE SENSOR
EC-483
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
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G H
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EC
NP
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P2539, P2541, P2542 LOW
FUEL PRESSURE SENSOR
DTC LogicINFOID:0000000006288355
D](/img/42/57033/w960_57033-2506.png "INFINITI QX56 2011 Factory Workshop Manual
P2539, P2541, P2542 LOW FUEL PRESSURE SENSOR
EC-483
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
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G H
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EC
NP
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P2539, P2541, P2542 LOW
FUEL PRESSURE SENSOR
DTC LogicINFOID:0000000006288355
D")
P2539, P2541, P2542 LOW FUEL PRESSURE SENSOR
EC-483
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
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G H
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EC
NP
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P2539, P2541, P2542 LOW
FUEL PRESSURE SENSOR
DTC LogicINFOID:0000000006288355
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for at least 60 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Proceed to EC-483, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006288356
1.CHECK LOW FUEL PRESSURE SENSOR POWER SUPPLY-I
1. Turn ignition switch OFF.
2. Disconnect low fuel pressure sensor connector.
3. Turn ignition switch ON.
4. Check the voltage between low fuel pressure sensor harness connector terminals.
Inspection result normal?
YES >> GO TO 6.
NO >> GO TO 2.
2.CHECK LOW FUEL PRESSURE SENSOR POWER SUPPLY-II
Check the voltage between low fuel pressure sensor harness connector and the ground.
DTC No. Trouble diagnosis name
(Trouble diagnosis content) DTC detecting condition Possible cause
P2539 LOW FUEL PRES SEN
(Low fuel pressure sensor
circuit low input and high in-
put) Signal voltage from the low fuel pressure
sensor remains at more than 4.84 V / less
than 0.3 V for 5 seconds or more. Harness or connectors
(Low fuel pressure sensor circuit is open
or shorted.)
(Power steering pressure sensor circuit is
open or shorted.)
(Cooling fan speed sensor circuit is open
or shorted.)
(FRP sensor circuit is open or shorted.)
Low fuel pressure sensor
Power steering pressure sensor
Cooling fan speed sensor
FRP sensor
P2541
LOW FUEL PRES SEN
(Low fuel pressure sensor
circuit low input) Signal voltage from the low fuel pressure
sensor remains at less than 0.49 V for 5 sec-
onds or more.
P2542 LOW FUEL PRES SEN
(Low fuel pressure sensor
circuit high input) Signal voltage from the low fuel pressure
sensor remains at more than 4.1 V for 5 sec-
onds or more.
Low fuel pressure sensor
Vo l ta g e
(Approx.)
Connector +
−
terminal
F25 3 1 5 V
Revision: 2010 May2011 QX56
Page 2508 of 5598
![INFINITI QX56 2011 Factory Workshop Manual
EC-484
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P2539, P2541, P2542 LOW
FUEL PRESSURE SENSOR
Is inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition](/img/42/57033/w960_57033-2507.png "INFINITI QX56 2011 Factory Workshop Manual
EC-484
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P2539, P2541, P2542 LOW
FUEL PRESSURE SENSOR
Is inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition")
EC-484
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P2539, P2541, P2542 LOW
FUEL PRESSURE SENSOR
Is inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness connector for short to power and short to ground, between the following terminals.
Is inspection result normal?
YES >> Perform the trouble diagnosis for power supply circuit. Refer to EC-168, "Diagnosis Procedure".
NO >> Repair or replace error-detected parts.
4.CHECK LOW FUEL PRESSURE SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between low fuel pressu re sensor harness connector and ECM harness connector.
Is inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace error-detected parts.
5.CHECK ECM GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between ECM harness connector and the ground.
Is inspection result normal?
YES >> Check intermittent incident. Refer to GI-40, "Intermittent Incident".
+
−Voltag e
(Approx.)
Low fuel pressure sensor
Connector Terminal F25 3 Ground 5 V
ECM Sensor
Connector Terminal Name Connector Terminal
F 111 27Power steering pressure sensor F35 1
Low fuel pressure sensor F25 3
Cooling fan speed sensor F39 2
28 FRP sensor F26 1
+ −
Continuity
Low fuel pressure sensor ECM
Connector Terminal Connector Terminal F25 1 F111 45 Existed
ECM Ground Continuity
Connector Terminal
F 111 5
Ground Existed
E80 11 4
11 5
174
175
Revision: 2010 May2011 QX56
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![INFINITI QX56 2011 Factory Workshop Manual
ELECTRICALLY-CONTROLLED COOLING FAN COUPLINGEC-495
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
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F
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EC
NP
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ELECTRICALLY-CONTROLLED COOLING FAN COUPLING
Component Function CheckINFOID:00000](/img/42/57033/w960_57033-2518.png "INFINITI QX56 2011 Factory Workshop Manual
ELECTRICALLY-CONTROLLED COOLING FAN COUPLINGEC-495
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
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F
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EC
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ELECTRICALLY-CONTROLLED COOLING FAN COUPLING
Component Function CheckINFOID:00000")
ELECTRICALLY-CONTROLLED COOLING FAN COUPLINGEC-495
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
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ELECTRICALLY-CONTROLLED COOLING FAN COUPLING
Component Function CheckINFOID:0000000006217997
1.CHECK COOLING FAN FUNCTION
WITH CONSULT-III
1. Start the engine.
2. Perform “FAN DUTY CONTROL” in “ACTIVE TEST” mode with CONSULT-III.
3. Check that cooling fan speed varies according to the percentage.
NOTE:
Speed changes gradually as the percentage changes.
WITHOUT CONSULT-III
1. Start the engine and warm up the engine until engine coolant temperature reaches at least 98°C (209 °F).
2. Check that cooling fan speed increase.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Proceed to EC-495, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006217998
1.CHECK DRIVE BELT
1. Turn ignition switch OFF.
2. Check that the drive belt is not broken.
Is inspection result normal?
YES >> GO TO 2.
NO >> Replace drive belt.
2.CHECK ELECTRICALLY-CONTROLLED COOLING FAN COUPLING POWER SUPPLY
1. Disconnect electrically-controlled c ooling fan coupling harness connector.
2. Turn ignition switch ON.
3. Check the voltage between electrically-controll ed cooling fan coupling harness connector and ground.
Is inspection result normal?
YES >> GO TO 3.
NO >> Perform trouble diagnosis for power supply circuit.
3.CHECK ELECTRICALLY-CONTROLLED COOLING FAN COUPLING GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check the continuity between electrically-cont rolled cooling fan coupling harness connector and ground.
Is inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace error-detected parts.
4.CHECK ELECTRICALLY-CONTROLLED COOLING FAN COUPLING CONTROL SIGNAL
WITH CONSULT-III
+ −Vo l ta g e
(Approx.)
Electrically-controlled cooling fan coupling
Connector TerminalF39 1 Ground Battery voltage
+ −Continuity
Electrically-controlled cooling fan coupling
Connector TerminalF39 6 Ground Existed
Revision: 2010 May2011 QX56
Page 2520 of 5598
![INFINITI QX56 2011 Factory Workshop Manual
EC-496
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
ELECTRICALLY-CONTROLLED COOLING FAN COUPLING
1. Start the engine.
2. Perform “FAN DUTY CONTROL” in “ACTIV
E TEST” mode of “ECM” with CONSULT-III.](/img/42/57033/w960_57033-2519.png "INFINITI QX56 2011 Factory Workshop Manual
EC-496
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
ELECTRICALLY-CONTROLLED COOLING FAN COUPLING
1. Start the engine.
2. Perform “FAN DUTY CONTROL” in “ACTIV
E TEST” mode of “ECM” with CONSULT-III.")
EC-496
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
ELECTRICALLY-CONTROLLED COOLING FAN COUPLING
1. Start the engine.
2. Perform “FAN DUTY CONTROL” in “ACTIV
E TEST” mode of “ECM” with CONSULT-III.
3. Set the Duty value to 100%.
4. Check the voltage between electrically-controll ed cooling fan coupling harness connector and ground.
CAUTION:
Wait for 1 minute or more to measure.
WITHOUT CONSULT-III
1. Start the engine and warm up the engine until engine coolant temperature reaches at least 98 °C (209 °F).
2. Check the voltage between electrically-controll ed cooling fan coupling harness connector and ground.
CAUTION:
Wait for 1 minute or more to measure.
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 5.
5.CHECK ELECTRICALLY-CONTROLLED COOL ING FAN COUPLING CONTROL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector.
3. Check the continuity between electrically-contro lled cooling fan coupling harness connector and IPDM E/
R harness connector.
4. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 6.
+ −Vo l ta g e
(Approx.)
Electrically-controlled cooling fan coupling
Connector Terminal
F39 3 Ground 2. 5 V
+ −Vo l ta g e
(Approx.)
Electrically-controlled cooling fan coupling
Connector Terminal
F39 3 Ground 2. 5 V
JMMIA0404GB
JMMIA0404GB
+−
Continuity
Electrically-controlled cooling fan
coupling IPDM E/R
Connector Terminal Connector Terminal F39 3 E17 72 Existed
Revision: 2010 May2011 QX56
Page 2521 of 5598
![INFINITI QX56 2011 Factory Workshop Manual
ELECTRICALLY-CONTROLLED COOLING FAN COUPLINGEC-497
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
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EC
NP
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NO >> Repair or replace error-detected parts.
6.CHECK CAN COMMUNICATION
Refer to](/img/42/57033/w960_57033-2520.png "INFINITI QX56 2011 Factory Workshop Manual
ELECTRICALLY-CONTROLLED COOLING FAN COUPLINGEC-497
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
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F
G H
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EC
NP
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NO >> Repair or replace error-detected parts.
6.CHECK CAN COMMUNICATION
Refer to")
ELECTRICALLY-CONTROLLED COOLING FAN COUPLINGEC-497
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
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F
G H
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EC
NP
O
NO >> Repair or replace error-detected parts.
6.CHECK CAN COMMUNICATION
Refer to LAN-18, "
Trouble Diagnosis Flow Chart".
Is inspection result normal?
YES >> Check intermittent incident. Refer to GI-40, "Intermittent Incident".
NO >> Repair or Replace error-detected parts.
7.CHECK COOLING FAN SPEED SENSOR
Refer to EC-367, "
Diagnosis Procedure".
Is inspection result normal?
YES >> Replace electrically-controlled cooling fan coupling. Refer to CO-16, "Removal and Installation".
NO >> Repair or replace error-detected parts.
Revision: 2010 May2011 QX56
Page 2552 of 5598
![INFINITI QX56 2011 Factory Workshop Manual
E C -528
< SYMPTOM DIAGNOSIS >[VK56VD]
ENGINE CONTROL SYSTEM SYMPTOMS
1 - 6: The numbers refer to the order of inspection.Lubrica-
tion
Oil pan/Oil strainer/Oil pump/Oil
filter/Oil gallery/Oil coole](/img/42/57033/w960_57033-2551.png "INFINITI QX56 2011 Factory Workshop Manual
E C -528
< SYMPTOM DIAGNOSIS >[VK56VD]
ENGINE CONTROL SYSTEM SYMPTOMS
1 - 6: The numbers refer to the order of inspection.Lubrica-
tion
Oil pan/Oil strainer/Oil pump/Oil
filter/Oil gallery/Oil coole")
E C -528
< SYMPTOM DIAGNOSIS >[VK56VD]
ENGINE CONTROL SYSTEM SYMPTOMS
1 - 6: The numbers refer to the order of inspection.Lubrica-
tion
Oil pan/Oil strainer/Oil pump/Oil
filter/Oil gallery/Oil cooler 55555 55 5 EM-56
EM-60
LU-9
LU-12
LU-14
Oil level (Low)/Filthy oil
LU-7
Cooling
Radiator/Hose/Radiator filler cap
55555 55 45 CO-11
CO-11
Thermostat 5
CO-21
Water pumpCO-19
Water galleryEM-115
Cooling fan
5CO-17
Coolant level (Low)/Contaminat-
ed coolant
CO-8
IVIS (INFINITI Vehicle Immobilizer System —
NATS)11
SEC-48
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Revision: 2010 May2011 QX56
Page 2582 of 5598
EM-20
< PERIODIC MAINTENANCE >
DRIVE BELTS
PERIODIC MAINTENANCE
DRIVE BELTS
Exploded ViewINFOID:0000000006289524
CheckingINFOID:0000000006289525
WARNING:
Be sure to perform the these steps when engine is stopped.
Check that the indicator (C) (notch on fixed side) of each auto-tensioner is within the possible use range (A).
NOTE:
Check the each auto-tensioners indication when the engine is cold.
When new drive belts is installed, the indicator (notch on fixed side) should be within the range (B) in the\
figure.
Visually check all drive belts for wear, damage or cracks.
If the indicator (notch on fixed side) is out of the possible use range or drive belts are damaged, replace drive
belts.
Tension AdjustmentINFOID:0000000006289526
Refer to EM-132, "Drive Belts".
Removal and InstallationINFOID:0000000006289527
REMOVAL
1. Move reservoir tank to the position without the hindrance for work. Refer to CO-13, "Exploded View".
1. Drive belt 2. Power steering oil pump pulley 3. Alternator pulley
4. Crankshaft pulley 5. A/C compressor 6. Idler pulley
7. Cooling fan pulley 8. Water pump pulley 9. Drive belt auto-tensioner
A. Possible use range B. Range when new drive belt is in-
stalledC. Indicator
D. View D
JPBIA3264ZZ
Revision: 2010 May2011 QX56