Infiniti QX56 (Z62). Manual — part 327
DAS
C1A00 CONTROL UNIT
DAS-345
< DTC/CIRCUIT DIAGNOSIS >
[LDW & LDP]
C
D
E
F
G
H
I
J
K
L
M
B
N
P
A
DTC/CIRCUIT DIAGNOSIS
C1A00 CONTROL UNIT
DTC Logic
INFOID:0000000006223739
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
DAS-345, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006223740
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-346
< DTC/CIRCUIT DIAGNOSIS >
[LDW & LDP]
C1A01 POWER SUPPLY CIRCUIT 1, C1A02 POWER SUPPLY CIRCUIT 2
C1A01 POWER SUPPLY CIRCUIT 1, C1A02 POWER SUPPLY CIRCUIT 2
DTC Logic
INFOID:0000000006223741
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start the engine.
2.
Turn the LDP 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
DAS-346, "Diagnosis Procedure"
NO
>> Refer to
GI-40, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000006223742
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
C1A03 VEHICLE SPEED SENSOR
DAS-347
< DTC/CIRCUIT DIAGNOSIS >
[LDW & LDP]
C
D
E
F
G
H
I
J
K
L
M
B
N
P
A
C1A03 VEHICLE SPEED SENSOR
DTC Logic
INFOID:0000000006223743
DTC DETECTION LOGIC
NOTE:
If DTC “C1A03” is detected along with DTC “U1000” or “C1A04”, first diagnose the DTC “U1000” or “C1A04”.
• Refer to
DAS-374, "ADAS CONTROL UNIT : DTC Logic"
• Refer to
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start the engine.
2.
Turn the LDP system ON.
3.
Drive the vehicle at 30 km/h (19 MPH) or more.
CAUTION:
Always drive safely.
4.
Stop the vehicle.
5.
Perform “All DTC Reading” with CONSULT-III.
6.
Check if the “C1A03” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”.
Is “C1A03” detected as the current malfunction?
YES-1 (Lane departure warning lamp: ON)>>Refer to
DAS-347, "Diagnosis Procedure"
.
YES-2 (Lane departure warning lamp: OFF)>>Refer to
.
NO
>> Refer to
GI-40, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000006223744
1.
CHECK SELF-DIAGNOSIS RESULTS
Check if “C1A04” or “U1000” is detected other than “C1A03” 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
>> GO TO 2.
2.
CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS RESULTS
Check if any DTC is detected in “Self Diagnostic Result” of “ABS”.
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
display)
Trouble diagnosis
name
DTC detecting condition
Possible causes
C1A03
(3)
VHCL SPEED SE
CIRC
If the vehicle speed signal (wheel speed) from
ABS actuator and electric unit (control unit) re-
ceived by the ADAS control unit via CAN com-
munication, are inconsistent
• Wheel speed sensor
• ABS actuator and electric unit (control
unit)
• ADAS control unit
DAS-348
< DTC/CIRCUIT DIAGNOSIS >
[LDW & LDP]
C1A04 ABS/TCS/VDC SYSTEM
C1A04 ABS/TCS/VDC SYSTEM
DTC Logic
INFOID:0000000006228186
DTC DETECTION LOGIC
NOTE:
If DTC “C1A04” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to
"ADAS CONTROL UNIT : DTC Logic"
Diagnosis Procedure
INFOID:0000000006228187
1.
CHECK SELF-DIAGNOSIS RESULTS
1.
Perform “All DTC Reading” with CONSULT-III.
2.
Check if the “U1000” is detected other than “C1A04” in “Self Diagnostic Result” of “ICC/ADAS”.
Is “U1000” detected?
YES
>> Perform the CAN communication system inspection. Repair or replace the malfunctioning parts.
DAS-374, "ADAS CONTROL UNIT : DTC Logic"
.
NO
>> GO TO 2.
2.
CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS RESULTS
Check if any DTC is detected in “Self Diagnostic Result” of “ABS”.
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
C1A04
(4)
ABS/TCS/VDC CIRC
If a malfunction occurs in the VDC/TCS/ABS
system
ABS actuator and electric unit (control
unit)
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