2005 INFINITI QX4 Factory Service Manual

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Page 2881 of 3419

INFINITI QX4 2005 Factory Service Manual RSU-6
CAN COMMUNICATION
Revision: October 20052005 QX56
CAN COMMUNICATIONPFP:23710
System DescriptionEES001H2
Refer to LAN-5, "CAN COMMUNICATION" .

Page 2882 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS
RSU-7
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Revision: October 20052005 QX56
TROUBLE DIAGNOSISPFP:00000
How to Perform Trouble Diagnoses for Quick and Accurate RepairEES001H3
INTRODUCTION
The re

Page 2883 of 3419

INFINITI QX4 2005 Factory Service Manual RSU-8
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
WORK FLOW
WEIA0077E

Page 2884 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS
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Revision: October 20052005 QX56
Component Parts and Harness Connector LocationEES001H4
WEIA0140E

Page 2885 of 3419

INFINITI QX4 2005 Factory Service Manual RSU-10
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
Wiring Diagram — A/SUSP —EES001H5
WEWA0026E

Page 2886 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS
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Revision: October 20052005 QX56
WEWA0063E

Page 2887 of 3419

INFINITI QX4 2005 Factory Service Manual RSU-12
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
Basic InspectionEES001H6
AIR HOSES
1. Check for pinched or damaged air hoses between the suspension air reservoir and each load leveling rear
a

RSU-12
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
Basic InspectionEES001H6
AIR HOSES
1. Check for pinched or damaged air hoses between the suspension air reservoir and each load leveling rear
air suspension shock absorber. Reposition, repair or replace hoses as necessary.
2. Check the air hose connections at the suspension air reservoir and at the shock absorbers for leaks. If
connections are leaking, repair or replace hoses as necessary.
POWER SYSTEM TERMINAL LOOSENESS AND BATTERY INSPECTION
Make sure the battery positive cable, negative cable and ground connection are not loose. In addition, make
sure the battery is sufficiently charged.
CK SUSP INDICATOR LAMP INSPECTION
1. Make sure the CK SUSP indicator lamp turns on for approximately 2 seconds when the ignition switch is
turned ON. If it does not, check the combination meter. Refer to DI-5, "
COMBINATION METERS" .
2. Make sure the lamp turns off approximately 2 seconds after the ignition switch is turned ON. If the lamp
does not turn off, conduct self-diagnosis of the suspension control unit.
3. After conducting the self-diagnosis, be sure to erase the error memory. Refer to RSU-13, "
CONSULT-II
Function (AIR LEVELIZER)" .
CK SUSP Indicator Lamp TimingEES001H7
X: ON
—: OFF
Control Unit Input/Output Signal StandardEES001H8
( ): Wire colorConditionCK SUSP
indicator lampRemarks
Ignition switch OFF – –
Ignition switch ON X Turns off after approximately 2 seconds.
Te r m i n a l
Item ConditionVoltage (V)
(Approx.)
+–
1 (V)
GroundCompressor relay output
Ignition switch ON or STARTBattery voltage
3 (W) Height sensor signal input 0.2V - 4.8V
5 (R) Reference voltage 5V
6 (G/R) Ignition power
Battery voltage
7 (W/L) Battery power —
8 (G/W) Diagnostic K-line — —
9 (SB) Exhaust valve output Ignition switch ON or START Battery voltage
10 (BR) Warning lamp output — —
14 (L) Height sensor ground — —
15 (BR/W) Alternator L signal input Engine running —
16 (B) Suspension control unit ground — 0V

Page 2888 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS
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Revision: October 20052005 QX56
CONSULT-II Function (AIR LEVELIZER)EES001H9
CONSULT-II can display each diagnostic item using the diagnostic test mo

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