Infiniti G37 Coupe. Manual — part 658
EXL-52
< COMPONENT DIAGNOSIS >
[XENON TYPE]
B2519 LEVELIZER CALIBRATION
B2519 LEVELIZER CALIBRATION
Description
INFOID:0000000001604633
AFS control unit transmits the height sensor signal from the height sensor.
DTC Logic
INFOID:0000000001604634
[B2519] Levelizer calibration
Diagnosis Procedure
INFOID:0000000001604635
1.
LEVELIZER ADJUSTMENT
Perform the levelizer adjustment.
>> Refer to
EXL-7, "LEVELIZER ADJUSTMENT : Special Repair Requirement"
.
DTC detection condition
DTC erase condition
Possible causes
The height sensor adjustment position is not recognized.
When the levelizer adjust-
ment is completed
AFS control unit
B2521 ECU CIRCUIT
EXL-53
< COMPONENT DIAGNOSIS >
[XENON TYPE]
C
D
E
F
G
H
I
J
K
M
A
B
EXL
N
O
P
B2521 ECU CIRCUIT
Description
INFOID:0000000001604636
AFS control unit judges the vehicle condition from each signal. AFS control unit controls AFS function and the
headlamp aiming.
DTC Logic
INFOID:0000000001604637
DTC DETECTION LOGIC
[B2521] ECU circuit
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.
Is “B2521” detected?
YES
>> Refer to
.
NO
>> Refer to
GI-38, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000001604638
1.
CHECK EACH SENSOR POWER SUPPLY
1.
Turn the ignition switch ON.
2.
Check the voltage between the AFS control unit harness connector and the 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.
Error detection condition
DTC erase condition
Possible cause
• AFS control unit indicates an applicable DTC when de-
tecting 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 shorted to the power
supply or the ground.
- The height sensor signal is shorted to the ground.
• AFS control unit RAM/ROM error
Ignition switch OFF
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
Terminals
Voltage
(Approx.)
(+)
(
−
)
AFS control unit
Ground
Connector
Terminal
M16
4
4 - 6 V
6
24
EXL-54
< COMPONENT DIAGNOSIS >
[XENON TYPE]
B2521 ECU CIRCUIT
2.
CHECK EACH SENSOR SIGNAL
Check the voltage between the AFS control unit harness connector and the ground.
Is the measurement value within the standard value?
YES
>> Replace AFS control unit.
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 the ignition switch OFF.
2.
Disconnect AFS control unit connector.
3.
Check continuity between the AFS control unit harness connector and the ground.
Does continuity exist?
YES
>> Repair the harnesses or connectors.
NO
>> Replace AFS control unit.
4.
CHECK EACH SENSOR POWER SUPPLY CIRCUIT
1.
Turn the ignition switch OFF.
2.
Disconnect AFS control unit connector.
3.
Check the voltage between the AFS control unit harness connector and the ground.
Is the measurement value normal?
YES
>> Replace AFS control unit.
NO
>> Repair the harnesses or connectors.
5.
CHECK EACH SENSOR SIGNAL SHORT CIRCUIT
1.
Turn the ignition switch OFF.
2.
Disconnect AFS control unit connector.
3.
Check continuity between the AFS control unit harness connector and the ground.
Terminals
Voltage
(Approx.)
(+)
(
−
)
AFS control unit
Ground
Connector
Terminal
M16
9
0.25 - 4.75 V
28
29
Terminals
Continuity
(+)
(
−
)
AFS control unit
Ground
Connector
Terminal
M16
4
Not existed
6
24
Terminals
Voltage
(Approx.)
(+)
(
−
)
AFS control unit
Ground
Connector
Terminal
M16
4
0 V
6
24
B2521 ECU CIRCUIT
EXL-55
< COMPONENT DIAGNOSIS >
[XENON TYPE]
C
D
E
F
G
H
I
J
K
M
A
B
EXL
N
O
P
Does continuity exist?
YES
>> Repair the harnesses or connectors.
NO
>> Replace AFS control unit.
6.
CHECK EACH SENSOR SIGNAL SHORT CIRCUIT
1.
Turn the ignition switch OFF.
2.
Disconnect AFS control unit connector.
3.
Turn the ignition switch ON.
4.
Check the voltage between the AFS control unit harness connector and the ground.
Is the measurement value normal?
YES
>> Replace AFS control unit.
NO
>> Repair the harnesses or connectors.
Terminals
Continuity
(+)
(
−
)
AFS control unit
Ground
Connector
Terminal
M16
9
Not existed
28
29
Terminals
Voltage
(Approx.)
(+)
(
−
)
AFS control unit
Ground
Connector
Terminal
M16
9
0 V
28
29
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