Infiniti QX56 (Z62). Manual — part 255
DAS
C1A00 CONTROL UNIT
DAS-57
< DTC/CIRCUIT DIAGNOSIS >
[ADAS CONTROL UNIT]
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DTC/CIRCUIT DIAGNOSIS
C1A00 CONTROL UNIT
DTC Logic
INFOID:0000000006223481
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start the engine.
2.
Perform “All DTC Reading” with CONSULT-III.
3.
Check if the “C1A00” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”.
Is “C1A00” detected as the current malfunction?
YES
>> Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006223482
1.
CHECK SELF-DIAGNOSIS RESULTS
Check if any DTC other than “C1A00” is detected in “Self Diagnostic Result” of “ICC/ADAS”.
Is any DTC detected?
YES
>> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to
.
NO
>> Replace the ADAS control unit. Refer to
DAS-63, "Removal and Installation"
DTC
(On board dis-
play)
Trouble diagnosis name
DTC detecting condition
Possible causes
C1A00
(0)
CONTROL UNIT
ADAS control unit internal malfunction
ADAS control unit
DAS-58
< DTC/CIRCUIT DIAGNOSIS >
[ADAS CONTROL UNIT]
C1A01 POWER SUPPLY CIRCUIT 1, C1A02 POWER SUPPLY CIRCUIT 2
C1A01 POWER SUPPLY CIRCUIT 1, C1A02 POWER SUPPLY CIRCUIT 2
DTC Logic
INFOID:0000000006223483
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 “C1A01” or “C1A02” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/
ADAS”.
Is “C1A01” or “C1A02” detected as the current malfunction?
YES
>> Refer to
.
NO
>> Refer to
GI-40, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000006223484
1.
CHECK ADAS CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT
Check power supply and ground circuit of ADAS control unit. Refer to
Is the inspection result normal?
YES
>> Replace the ADAS control unit. Refer to
DAS-63, "Removal and Installation"
NO
>> Repair or replace the malfunctioning parts.
DTC
(On board dis-
play)
Trouble diagnosis
name
DTC detecting condition
Possible causes
C1A01
(1)
POWER SUPPLY
CIR
The battery voltage sent to ADAS control unit re-
mains less than 7.9 V for 5 seconds
• Connector, harness, fuse
• ADAS control unit
C1A02
(2)
POWER SUPPLY
CIR 2
The battery voltage sent to ADAS control unit re-
mains more than 19.3 V for 5 seconds
DAS
U1000 CAN COMM CIRCUIT
DAS-59
< DTC/CIRCUIT DIAGNOSIS >
[ADAS CONTROL UNIT]
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U1000 CAN COMM CIRCUIT
Description
INFOID:0000000006223485
CAN COMMUNICATION
CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicle is equipped with many electronic control units, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with 2 communication lines (CAN-H, CAN-L) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads the required data only.
CAN communication signal chart. Refer to
LAN-28, "CAN COMMUNICATION SYSTEM : CAN Communica-
ITS COMMUNICATION
• ITS communication is a multiplex communication system. This enables the system to transmit and receive
large quantities of data at high speed by connecting control units with 2 communication lines.
• ITS communication lines adopt twisted-pair line style (two lines twisted) for noise immunity.
DTC Logic
INFOID:0000000006223486
DTC DETECTION LOGIC
NOTE:
If “U1000” is detected, first diagnose the CAN communication system.
Diagnosis Procedure
INFOID:0000000006223487
1.
PERFORM THE SELF-DIAGNOSIS
1.
Turn the ignition switch ON.
2.
Turn the MAIN switch of ICC system ON, and then wait for 30 seconds or more.
3.
Perform “All DTC Reading” with CONSULT-III.
4.
Check if the “U1000” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”.
Is “U1000” detected as the current malfunction?
YES
>> Refer to
LAN-18, "Trouble Diagnosis Flow Chart"
NO
>> Refer to
GI-40, "Intermittent Incident"
.
DTC
(On board
display)
Trouble diagnosis name
DTC detecting condition
Possible causes
U1000
(100)
CAN COMM CIRCUIT
If ADAS control unit is not transmitting or receiv-
ing CAN communication signal or ITS communi-
cation signal for 2 seconds or more
• CAN communication system
• ITS communication system
DAS-60
< DTC/CIRCUIT DIAGNOSIS >
[ADAS CONTROL UNIT]
U1010 CONTROL UNIT (CAN)
U1010 CONTROL UNIT (CAN)
Description
INFOID:0000000006223488
CAN controller controls the communication of CAN communication signal and ITS communication signal, and
the error detection.
DTC Logic
INFOID:0000000006223489
DTC DETECTION LOGIC
Diagnosis Procedure
INFOID:0000000006223490
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn the MAIN switch of ICC system ON.
2.
Perform “All DTC Reading” with CONSULT-III.
3.
Check if the “U1010” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”.
Is “U1010” detected as the current malfunction?
YES
>> Replace the ADAS control unit. Refer to
DAS-63, "Removal and Installation"
NO
>> INSPECTION END
DTC
(On board
display)
Trouble diagnosis name
DTC detecting condition
Possible causes
U1010
(110)
CONTROL UNIT (CAN)
If ADAS control unit detects malfunction by
CAN controller initial diagnosis
ADAS control unit
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