Infiniti FX35, FX50 (S51). Manual — part 322
CCS-108
< DTC/CIRCUIT DIAGNOSIS >
[ICC (FULL SPEED RANGE)]
C1A31 BCU INTERNAL MALF
C1A31 BCU INTERNAL MALF
Description
INFOID:0000000005501664
The brake booster control unit inputs the brake fluid pressure control signal and release switch signal and
transmits them to ICC sensor integrated unit via ITS communication. Also, it receives the brake fluid pressure
command signal from ICC sensor integrated unit via ITS communication and activates the booster solenoid to
operate the brake booster (brake).
DTC Logic
INFOID:0000000005501665
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start the engine.
2.
Turn the MAIN switch of ICC system ON.
3.
Perform “All DTC Reading” with CONSULT-III.
4.
Check if the “C1A31” is detected as the current malfunction in “Self Diagnostic Result” of “ICC”.
Is “C1A31” detected as the current malfunction?
YES
>> Refer to
CCS-108, "Diagnosis Procedure"
NO
>> Refer to
GI-36, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000005501666
1.
CHECK SELF-DIAGNOSIS RESULTS
Check if any DTC other than “C1A31” is detected in “Self Diagnostic Result” of “ICC”.
Is any DTC detected?
YES
>> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to
NO
>> Replace the brake booster control unit.
Special Repair Requirement
INFOID:0000000005501667
DESCRIPTION
Perform the action test after adjusting the laser beam aiming of ICC sensor integrated unit when the following
operation is performed.
• Removal and installation of ICC sensor integrated unit
• Replacement of ICC sensor integrated unit
SPECIAL REPAIR REQUIREMENT
1.
LASER BEAM AIMING ADJUSTMENT OF ICC SENSOR INTEGRATED UNIT
Adjust the laser beam aiming of the ICC sensor integrated unit. Refer to
>> GO TO 2.
2.
CHECK ICC SYSTEM
1.
Erase the “Self Diagnostic Result”, and then perform “All DTC Reading” again after performing the action
test. (Refer to
CCS-18, "ACTION TEST : Description"
DTC
(On board dis-
play)
Trouble diagnosis name
DTC detecting condition
Possible causes
C1A31
(31)
BCU INTERNAL MALF
Brake booster control unit internal malfunction
Brake booster control unit
CCS
C1A31 BCU INTERNAL MALF
CCS-109
< DTC/CIRCUIT DIAGNOSIS >
[ICC (FULL SPEED RANGE)]
C
D
E
F
G
H
I
J
K
L
M
B
N
P
A
2.
Check that the ICC system is normal.
>> WORK END
CCS-110
< DTC/CIRCUIT DIAGNOSIS >
[ICC (FULL SPEED RANGE)]
C1A32 IBA FLAG STUCK
C1A32 IBA FLAG STUCK
Description
INFOID:0000000005501668
ICC sensor integrated unit shares components with the IBA system.
DTC Logic
INFOID:0000000005501669
DTC DETECTION LOGIC
NOTE:
If DTC “C1A32” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start the engine.
2.
Wait for approximately 5 minutes or more after turning the MAIN switch of ICC system ON.
3.
Perform “All DTC Reading” with CONSULT-III.
4.
Check if the “C1A32” is detected as the current malfunction in “Self Diagnostic Result” of “ICC”.
Is “C1A32” detected as the current malfunction?
YES
>> Refer to
CCS-110, "Diagnosis Procedure"
NO
>> Refer to
GI-36, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000005501670
1.
CHECK SELF-DIAGNOSIS RESULTS
Check if “U1000” is detected other than “C1A32” in “Self Diagnostic Result” of “ICC”.
Is “U1000” detected?
YES
>> Perform the CAN communication system inspection. Repair or replace the malfunctioning parts.
.
NO
>> GO TO 2.
2.
REPLACE BRAKE BOOSTER CONTROL UNIT
1.
Turn the ignition switch OFF.
2.
Replace the brake booster control unit.
3.
Erases All self-diagnosis results.
4.
Perform DTC confirmation procedure. Refer to
5.
Perform “All DTC Reading”.
6.
Check if the “C1A32” is detected in “Self Diagnostic Result” of “ICC”.
Is “C1A32” detected?
YES
>> Replace the ICC sensor integrated unit. Refer to
NO
>> INSPECTION END
Special Repair Requirement
INFOID:0000000005501671
DESCRIPTION
Perform the action test after adjusting the laser beam aiming of ICC sensor integrated unit when the following
operation is performed.
• Removal and installation of ICC sensor integrated unit
• Replacement of ICC sensor integrated unit
SPECIAL REPAIR REQUIREMENT
DTC
(On board dis-
play)
Trouble diagnosis name
DTC detecting condition
Possible causes
C1A32
(32)
IBA FLAG STUCK
If the control (detection) of IBA is malfunction-
ing
• ICC sensor integrated unit
• Brake booster control unit
CCS
C1A32 IBA FLAG STUCK
CCS-111
< DTC/CIRCUIT DIAGNOSIS >
[ICC (FULL SPEED RANGE)]
C
D
E
F
G
H
I
J
K
L
M
B
N
P
A
1.
LASER BEAM AIMING ADJUSTMENT OF ICC SENSOR INTEGRATED UNIT
Adjust the laser beam aiming of the ICC sensor integrated unit. Refer to
>> GO TO 2.
2.
CHECK ICC SYSTEM
1.
Erase the “Self Diagnostic Result”, and then perform “All DTC Reading” again after performing the action
test. (Refer to
CCS-18, "ACTION TEST : Description"
2.
Check that the ICC system is normal.
>> WORK END
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