Infiniti QX56 (Z62). Manual — part 696
EXL-76
< DTC/CIRCUIT DIAGNOSIS >
[XENON TYPE]
B2519 LEVELIZER CALIBRATION
B2519 LEVELIZER CALIBRATION
DTC Logic
INFOID:0000000006213940
Diagnosis Procedure
INFOID:0000000006213941
1.
LEVELIZER ADJUSTMENT
Perform the levelizer adjustment.
>> Refer to
EXL-61, "LEVELIZER ADJUSTMENT : Special Repair Requirement"
DTC No.
Trouble diagnosis name
DTC detection condition
Possible causes
B2519
Levelizer calibration
The height sensor adjustment position is not
recognized.
AFS control unit
B2521 ECU CIRCUIT
EXL-77
< DTC/CIRCUIT DIAGNOSIS >
[XENON TYPE]
C
D
E
F
G
H
I
J
K
M
A
B
EXL
N
O
P
B2521 ECU CIRCUIT
DTC Logic
INFOID:0000000006213942
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC ERASE
Erase the DTC memory of AFS with CONSULT-III.
>> GO TO 2.
2.
DTC CONFIRMATION PROCEDURE
1.
Turn ignition ON.
2.
Select the self-diagnosis with CONSULT-III.
3.
Check the self-diagnosis result. Refer to
Is DTC “B2521” detected?
YES
>> Refer to
.
NO
>> Refer to
GI-40, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000006213943
1.
CHECK EACH SENSOR POWER SUPPLY
1.
Turn ignition switch ON.
2.
Check voltage between AFS control unit harness connector and ground.
Is the measurement value within the standard value?
YES
>> GO TO 2.
Less than the standard value >>GO TO 3.
Higher than the standard value>>GO TO 4.
2.
CHECK EACH SENSOR SIGNAL
Check voltage between AFS control unit harness connector and ground.
DTC No.
Trouble diagnosis name
Error detection condition
Possible cause
B2512
ECU circuit
• AFS control unit indicates an applicable
DTC when detecting any of the following
conditions continuously for 2 seconds or
more.
- The swivel position sensor is shorted to
the power supply or the ground.
- The swivel position sensor signal is
shorted to the ground.
- The height sensor power supply is short-
ed to the power supply or the ground.
- The height sensor signal is shorted to
the ground.
• AFS control unit RAM/ROM error
Swivel position sensor
• Swivel position sensor
• Harness and connector
• AFS control unit
Height sensor
• Height sensor
• Harness and connector
• AFS control unit
AFS control unit (RAM/
ROM)
• AFS control unit
(+)
(
−
)
Voltage
(Approx.)
AFS control unit
Connector
Terminal
M135
4
Ground
5 V
5
6
24
EXL-78
< DTC/CIRCUIT DIAGNOSIS >
[XENON TYPE]
B2521 ECU CIRCUIT
Is the measurement value within the standard value?
YES
>> Replace AFS control unit. Refer to
EXL-135, "Removal and Installation"
Less than the standard value >>GO TO 5.
Higher than the standard value>>GO TO 6.
3.
CHECK EACH SENSOR POWER SUPPLY SHORT CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect AFS control unit connector.
3.
Check continuity between AFS control unit harness connector and ground.
Is the inspection result normal?
YES
>> Replace AFS control unit. Refer to
EXL-135, "Removal and Installation"
NO
>> Repair or replace harness.
4.
CHECK EACH SENSOR POWER SUPPLY SHORT CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect AFS control unit connector.
3.
Check voltage between AFS control unit harness connector and ground.
Is the inspection result normal?
YES
>> Replace AFS control unit. Refer to
EXL-135, "Removal and Installation"
NO
>> Repair or replace harness.
5.
CHECK EACH SENSOR SIGNAL SHORT CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect AFS control unit connector.
3.
Check continuity between AFS control unit harness connector and ground.
(+)
(
−
)
Voltage
(Approx.)
AFS control unit
Connector
Terminal
M135
9
Ground
0.25 - 4.75 V
23
28
29
AFS control unit
Ground
Continuity
Connector
Terminal
M135
4
Not existed
5
6
24
(+)
(
−
)
Voltage
(Approx.)
AFS control unit
Connector
Terminal
M135
4
Ground
0 V
5
6
24
B2521 ECU CIRCUIT
EXL-79
< DTC/CIRCUIT DIAGNOSIS >
[XENON TYPE]
C
D
E
F
G
H
I
J
K
M
A
B
EXL
N
O
P
Is the inspection result normal?
YES
>> Replace AFS control unit. Refer to
EXL-135, "Removal and Installation"
NO
>> Repair or replace harness.
6.
CHECK EACH SENSOR SIGNAL SHORT CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect AFS control unit connector.
3.
Turn ignition switch ON.
4.
Check voltage between AFS control unit harness connector and ground.
Is the inspection result normal?
YES
>> Replace AFS control unit. Refer to
EXL-135, "Removal and Installation"
NO
>> Repair or replace harness.
AFS control unit
Ground
Continuity
Connector
Terminal
M135
9
Not existed
23
28
29
(+)
(
−
)
Voltage
(Approx.)
AFS control unit
Connector
Terminal
M135
9
Ground
0 V
23
28
29
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