2005 INFINITI QX4 Factory Service Manual

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Page 41 of 3419

INFINITI QX4 2005 Factory Service Manual ACS-32
[ICC]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Revision: October 20052005 QX56
3. With engine started, touch “START”, “ICC”, “SELF-DIAG RESULTS” on CONSULT-II screen in this order.

Page 42 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
ACS-33
[ICC]
C
D
E
F
G
H
I
J
L
MA
B
ACS
Revision: October 20052005 QX56
When multiple malfunctions are detected, a maximum of 3 code numbers can be stored; t

Page 43 of 3419

INFINITI QX4 2005 Factory Service Manual ACS-34
[ICC]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Revision: October 20052005 QX56
1. CHECK ICC SYSTEM DISPLAY
When ignition switch is ON, do all displays illuminate?
YES or NO
YES >> GO TO 2.
NO

Page 44 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
ACS-35
[ICC]
C
D
E
F
G
H
I
J
L
MA
B
ACS
Revision: October 20052005 QX56
7. CHECK CAN COMMUNICATION
Perform self-diagnosis with CONSULT-II, and check CAN commu

Page 45 of 3419

INFINITI QX4 2005 Factory Service Manual ACS-36
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: October 20052005 QX56
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMSPFP:00000
Diagnostic Trouble Code (DTC) ChartEKS00BLZ
×:Applicable

Page 46 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
ACS-37
[ICC]
C
D
E
F
G
H
I
J
L
MA
B
ACS
Revision: October 20052005 QX56
NOTE: DTC 55 will display when no malfunction is detected.
DTC 11 CONTROL UNITEKS00B

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
ACS-37
[ICC]
C
D
E
F
G
H
I
J
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MA
B
ACS
Revision: October 20052005 QX56
NOTE: DTC 55 will display when no malfunction is detected.
DTC 11 CONTROL UNITEKS00BM0
1. DIAGNOSTIC CHECK
Are any items other than “DTC 11 CONTROL UNIT” indicated on self-diagnosis display?
YES or NO
YES >> Repair or replace as necessary. Erase DTC and perform ICC system running test. Refer to ACS-
9, "ICC System Running Test" . Then perform self-diagnosis of ICC system again.
NO >> Replace ICC unit. Refer to ACS-60, "
ICC Unit" . Erase DTC and perform ICC system running test.
Refer to ACS-9, "
ICC System Running Test" . Then perform self-diagnosis of ICC system again.
DTC 12 VDC CONTROL UNITEKS00BM1
1. DIAGNOSIS CHECK
With CONSULT-II
Perform self-diagnosis of ABS actuator and electric unit (control unit). Is malfunction indicated?
YES or NO
YES >> Repair or replace as necessary. Erase DTC and perform ICC system running test. Refer to ACS-
9, "ICC System Running Test" . Then perform self-diagnosis of ICC system again.
NO >> GO TO 2.
2. CHECK CONNECTOR ICC UNIT AND ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
1. Turn ignition switch OFF.
2. Disconnect ICC unit, and ABS actuator and electric unit (control unit) connectors, and connect them
securely again. Erase DTC, then perform self-diagnosis of ICC system again.
OK or NG
OK >> Poor connector connection. Check connector housing for disconnected, loose, bent and collapsed
terminals. If any malfunction is detected, repair as necessary. Erase DTC and perform ICC sys-
tem running test. Refer to ACS-9, "
ICC System Running Test" . Then perform self-diagnosis of
ICC system again.
NG >> GO TO 3.
98 GEAR POSITION×××
TCM malfunction
A/T turbine revolution sensor
malfunction
A/T vehicle speed sensor mal-
functionACS-49
102 LASER STAIN×× ×ICC sensor body window has
contaminationACS-50
103 LASER SENSOR FAIL×× ×ICC sensor internal malfunctionACS-51
104 LASER AIMING INCMP×× ×Laser beam aiming of ICC sensor
is not adjustedACS-51
107 LASER COMM FAIL×× ×
CAN data received by ICC sen-
sor is strange (from ICC unit,
combination meter or ECM)ACS-51
109 LASER HIGH TEMP×× ×Temperature around ICC sensor
is excessively highACS-52
DTC
No.CONSULT-II screen termsICC sys-
tem
warning
lampFail-safe
Malfunctions detected where...Refer-
ence
page Vehicle-
to-vehi-
cle dis-
tance
control
modeConven-
tional
(fixed
speed)
cruise
control
modeBrake
assist
(with pre-
view
function)

Page 47 of 3419

INFINITI QX4 2005 Factory Service Manual ACS-38
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: October 20052005 QX56
3. CHECK HARNESS BETWEEN ICC UNIT AND ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
UNIT)
1. Turn ignition switch OF

ACS-38
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: October 20052005 QX56
3. CHECK HARNESS BETWEEN ICC UNIT AND ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
UNIT)
1. Turn ignition switch OFF.
2. Disconnect ICC unit, and ABS actuator and electric unit (control
unit) connectors.
3. Check continuity between ICC unit harness connector B13 ter-
minal 10 (V/R), and ABS actuator and electric unit (control unit)
connector E125 terminal 7 (V/R).
OK or NG
OK >> Replace ICC unit. Refer to ACS-60, "ICC Unit" . Erase
DTC and perform ICC system running test. Refer to
ACS-9, "
ICC System Running Test" . Then perform self-diagnosis of ICC system again.
NG >>
Repair harness between ICC unit, and ABS actuator and electric unit (control unit).
Erase DTC and perform ICC system running test. Refer to ACS-9, "ICC System Running Test"
. Then perform self-diagnosis of ICC system again.
DTC 20 CAN COMM CIRCUITEKS00BM2
1. CHECK CAN COMMUNICATION
With CONSULT-II
1. Perform self-diagnosis.
2. Print self-diagnostic result.
>> After printing self-diagnostic result, GO TO “CAN system”. Refer to LAN-3, "
Precautions When
Using CONSULT-II" .
DTC 31 POWER SUPPLY CIR1, DTC 34 POWER SUPPLY CIR2EKS00BM3
1. CHECK ICC UNIT CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect ICC unit connectors and connect them securely again. Erase DTC, then perform self-diagno-
sis of ICC system again.
OK or NG
OK >> GO TO 2.
NG >>
Poor connector connection.
Check connector. Check connector housing for disconnected, loose, bent, and collapsed termi-
nals. If any malfunction is detected, repair as as necessary. Erase DTC and perform ICC sys-
tem running test. Refer to ACS-9, "
ICC System Running Test" . Then perform self-diagnosis of
ICC system again.
2. CHECK POWER SUPPLY CIRCUIT FOR ICC UNIT
1. Turn ignition switch ON.
2. Check voltage between ICC unit harness connector B17 termi-
nal 33 (R/B), 42 (R/B) and ground.
OK or NG
OK >> GO TO 3.
NG >>
Repair ICC unit power supply harness.
Erase DTC and perform ICC system running test.
Refer to ACS-9, "
ICC System Running Test" . Then
perform self-diagnosis of ICC system again. Continuity should exist.
WKIA3616E
Battery voltage should exist.
SKIA11 73 E

Page 48 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
ACS-39
[ICC]
C
D
E
F
G
H
I
J
L
MA
B
ACS
Revision: October 20052005 QX56
3. CHECK GROUND CIRCUIT FOR ICC UNIT
1. Turn ignition switch OFF.
2. Disconnect ICC

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