Infiniti M45 (Y34). Manual — part 19
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
ACS-69
[ICC]
C
D
E
F
G
H
I
J
L
M
A
B
ACS
63
RELEASE SW CIRCUIT
×
×
×
×
●
Release switch harness is open
or shorted.
●
Release switch malfunction
●
Release switch input circuit mal-
function
65
PRESSURE CONTROL
×
×
×
×
●
Booster malfunction
74
LASER BEAM OFF CNTR
×
×
×
●
Laser beam of ICC sensor is off
the aiming point.
81
POWER SUPPLY VALVE
[HI VOLTAGE]
×
×
×
●
Power supply relay to vacuum
pump, air valve, and release
valve in ICC unit is stuck closed.
●
Power supply wire to release
valve is shorted to power supply.
82
VACUUM PUMP
[HI VOLTAGE]
×
×
×
●
Vacuum pump drive circuit in ICC
unit.
ICC unit
malfunc-
tion
83
VACUUM PUMP
[LOW VOLTAGE]
×
×
×
●
Vacuum pump drive circuit in ICC
unit is irregular condition.
●
Vacuum pump control line is
shorted to ground.
84
AIR VALVE
[HI VOLTAGE]
×
×
×
●
Air valve drive circuit in ICC unit
is irregular condition.
ICC unit
malfunc-
tion
85
AIR VALVE
[LOW VOLTAGE]
×
×
×
●
Air valve drive circuit in ICC unit
is irregular condition.
●
Air valve control line is shorted to
ground.
86
RELEASE VALVE
[HI VOLTAGE]
×
×
×
●
Release valve drive circuit in ICC
unit is irregular condition.
ICC unit
malfunc-
tion
87
RELEASE VALVE
[LOW VOLTAGE]
×
×
×
●
Release valve drive circuit in ICC
unit is irregular condition.
●
Power supply relay to vacuum
pump, air valve, and release
valve in ICC unit is stuck to OFF.
●
Release valve control line is
shorted.
●
Power supply line to vacuum
pump, air valve, and release
valve is open.
90
STOP LAMP RLY FIX
×
×
×
×
●
Normally open terminal of stop
lamp relay is stuck.
92
ECM CIRCUIT
×
×
×
×
●
ECM malfunction
●
Throttle position sensor malfunc-
tion
●
ICC unit malfunction
97
AT CIRCUIT
×
×
×
●
TCM malfunction
DTC
No.
CONSULT-II screen terms
ICC
system
warn-
ing
lamp
Fail-safe
Malfunctions detected where...
Refer-
ence
page
Vehicle-
to-vehi-
cle dis-
tance
control
mode
Conven-
tional
(fixed
speed)
cruise
control
mode
Brake
assist
(with pre-
view
function)
ACS-70
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
DTC 11 CONTROL UNIT
AKS002QE
1.
DIAGNOSTIC CHECK
1.
Are any items other than “DTC 11 CONTROL UNIT” indicated on self-diagnosis display?
Yes or No
Yes
>> Repair or replace applicable item. Erase DTC and perform ICC system running test. Then perform
self-diagnosis of ICC system again.
No
>> Replace ICC unit. Erase DTC and perform ICC system running test. Then perform self-diagnosis
of ICC system again.
DTC 20 CAN COMM CIRCUIT
AKS002QF
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
DTC 31 POWER SUPPLY CIR, DTC 34 POWER SUPPLY CIR 2
AKS002QG
1.
CHECK CONNECTOR ICC UNIT
1.
Turn ignition switch OFF.
2.
Disconnect ICC unit connector, and connect it securely again. Then erase DTC. After that perform self-
diagnosis 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 ter-
minals. If any malfunction is detected, repair applicable part.) After repair, erase DTC, and per-
form ICC running test. Then perform self-diagnosis of ICC system again.
98
GEAR POSITION
×
×
×
●
TCM malfunction
●
AT turbine revolution sensor mal-
function
●
AT vehicle speed sensor mal-
function
102
RADAR STAIN
×
×
×
●
ICC sensor body window has
contamination.
103
LASER SENSOR FAIL
×
×
×
●
ICC sensor internal malfunction
104
LASER AIMING INCMP
×
×
×
●
Laser beam aiming of ICC sensor
is not adjusted.
107
LASER COMM FAIL
×
×
×
●
CAN data received by ICC sen-
sor is strange (from ICC unit).
109
LASER HIGH TEMP
×
×
×
●
Temperature around ICC sensor
is excessively high.
DTC
No.
CONSULT-II screen terms
ICC
system
warn-
ing
lamp
Fail-safe
Malfunctions detected where...
Refer-
ence
page
Vehicle-
to-vehi-
cle dis-
tance
control
mode
Conven-
tional
(fixed
speed)
cruise
control
mode
Brake
assist
(with pre-
view
function)
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
ACS-71
[ICC]
C
D
E
F
G
H
I
J
L
M
A
B
ACS
2.
CHECK POWER SUPPLY CIRCUIT FOR ICC UNIT
1.
Turn ignition switch ON.
2.
Check voltage between ICC unit harness connector B244 termi-
nal 33 (W/G), 42 (W/G) and ground.
OK or NG
OK
>> GO TO 3.
NG
>>
●
Repair ICC unit power supply harness.
●
After repair, erase DTC and perform ICC system run-
ning test. Then, perform self-diagnosis of ICC system
again.
3.
CHECK GROUND CIRCUIT FOR ICC UNIT
1.
Turn ignition switch OFF.
2.
Disconnect ICC unit connector.
3.
Check continuity between ICC unit harness connector B243 ter-
minal 19 (B), 20 (B), B244 terminal 46 (B) and ground.
OK or NG
OK
>> After replacing ICC unit, erase DTC, and perform ICC
system running test. Then perform self-diagnosis of ICC
system again.
NG
>>
●
Repair ICC unit ground harness.
●
After repair, erase DTC and perform ICC system running test. Then, perform self-diagnosis of
ICC system again.
DTC 41 VHCL SPEED SE CIRC
AKS002QH
1.
ICC UNIT SELF-DIAGNOSIS CHECK
1.
Perform self-diagnosis. Is “DTC 43 ABS/TCS/VDC CIRC” or “DTC 20 CAN COMM CIRCUIT” indicated in
self-diagnosis item display?
Yes or No
Yes
>> Repair or replace applicable item. Erase DTC and perform ICC system running test. Then perform
self-diagnosis of ICC system again.
No
>> GO TO 2
2.
CHECK AT VEHICLE SPEED SENSOR
With CONSULT-II
●
With data monitor, check “VHCL SPD AT”operate normally. Refer to
OK or NG
OK
>> Replace ICC unit. Erase DTC and perform ICC system running test. Then perform self-diagnosis
of ICC system again.
NG
>>
●
Check TCM.
●
After repair, erase DTC and perform ICC system running test. Then, perform self-diagnosis of
ICC system again.
Battery voltage should exist. (more than 8V)
SKIA1173E
Continuity should exist.
SKIA1174E
ACS-72
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
DTC 42 THRTL POS SEN CIRC
AKS002QI
1.
CHECK CONNECTOR FOR ICC UNIT
1.
Turn ignition switch OFF.
2.
Disconnect ICC unit connector, and connect it securely again. Then erase DTC. After that perform self-
diagnosis of ICC system again.
OK or NG
OK
>>
●
Poor connector connection
●
Check connector. (Check connector housing for disconnected, loose, bent, and collapsed ter-
minals. If any malfunction is detected, repair applicable part.) After repair, erase DTC, and per-
form ICC system running test. Then perform self-diagnosis of ICC system again.
NG
>> GO TO 2.
2.
CHECK THROTTLE POSITION SENSOR AND IDLE SWITCH
With CONSULT-II
●
With data monitor, check that “THRTL SENSOR” and “IDLE SW” switches operate normally. Refer to
OK or NG
OK
>> Replace ICC unit. Erase DTC and perform ICC system running test. Then perform self-diagnosis
of ICC system again.
NG
>> GO TO 3.
3.
CHECK THROTTLE POSITION SIGNAL FOR ICC UNIT
●
Check voltage between ICC unit harness connector B245 termi-
nal 69 (R/Y) and 68 (B).
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
4.
CHECK HARNESS BETWEEN ICC UNIT AND ECM
1.
Turn ignition switch OFF.
2.
Disconnect connectors of ICC unit and ECM.
3.
Check continuity between ICC unit harness connector B245 ter-
minal 69 (R/Y) and ECM harness connector F102 terminal 113
(R/Y).
4.
Check continuity between ICC unit harness connector B245 ter-
minal 69 (R/Y) and ground.
OK or NG
OK
>>
●
Check ECM.
●
After repair, erase DTC and perform ICC system running test. Then, perform self-diagnosis of
ICC system again.
NG
>>
●
Repair harness between ICC unit and ECM
●
After repair, erase DTC, and perform ICC system running test. Then perform self-diagnosis of
ICC system again.
Approx 0.5V (Throttle full closed)
Approx 4.0V (Throttle full open)
SKIA1177E
Continuity should exist.
Continuity should not exist.
SKIA1178E
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