Infiniti Q45. Manual — part 270
TROUBLE DIAGNOSIS FOR SYSTEM
BRC-45
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
3.
CHECK SOLENOID AND VDC SWITCHING VALVE CIRCUIT
1.
Turn ignition switch “OFF”.
2.
Disconnect VDC actuator connector E21,E22 and VDC/TCS/ABS control unit connector.
3.
Check continuity between VDC/TCS/ABS control unit harness
connector E218 and VDC actuator harness connector E21,E22.
OK or NG
OK
>> GO TO 4.
NG
>> Open or short in harness between VDC/TCS/ABS control unit and VDC actuator
4.
CHECK SOLENOID AND VDC SWITCHING VALVE INPUT SIGNAL
1.
Turn ignition switch “OFF”.
2.
Disconnect VDC actuator connector.
3.
Check resistance of VDC actuator solenoid.
OK or NG
OK
>> Perform VDC/TCS/ABS control unit self-diagnosis
again.
NO
>> Replace VDC actuator assembly.
Item
VDC/TCS/
ABS control
unit
VDC actua-
tor
Continuity
FR LH IN ABS SOL
5
1
Continuity should
exist.
FR LH OUT ABS
SOL
3
14
RR RH IN ABS SOL
6
7
RR RH OUT ABS
SOL
4
17
FR RH IN ABS SOL
26
3
FR RH OUT ABS
SOL
55
15
RR LH IN ABS SOL
53
5
RR LH OUT ABS
SOL
25
16
PRIMARY SIDE
USV CIRCUIT
49
26
SECONDARY SIDE
USV CIRCUIT
50
25
PRIMARY SIDE
HSV CIRCUIT
54
28
SECONDARY SIDE
HSV CIRCUIT
52
27
SFIA2365E
VDC actuator connec-
tor
VDC actuator connec-
tor
Resistance value
1, 3, 5, 7, 25, 26
19
6.0 - 11
Ω
14, 15, 16, 17, 27, 28
3.0 - 5.0
Ω
SFIA2317E
BRC-46
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
Actuator Motor and Motor Relay
NFS000D5
INSPECTION PROCEDURE
1.
CHECK SELF-DIAGNOSIS RESULTS
With CONSULT-II
1.
Turn ignition switch “ON”. (Do not start engine.)
2.
Select “SELF-DIAG RESULTS” mode for “VDC” with CONSULT-II.
3.
Touch “ERASE”.
4.
Turn ignition switch “OFF” and wait at least 10 seconds.
5.
Check the self-diagnostic results.
Is above displayed in the self-diagnosis display?
YES
>> GO TO 2.
NO
>> INSPECTION END
2.
CHECK CONNECTOR
1.
Turn ignition switch “OFF”.
2.
Disconnect VDC/TCS/ABS control unit connector E218, VDC actuator connector and VDC relay box con-
nector E55, E56, E57,check terminal for deformation, disconnection, looseness, and so on. If any mal-
function is found, repair or replace terminal.
3.
Reconnect connectors and then perform the self-diagnosis.
OK or NG
OK
>> INSPECTION END.
NG
>> GO TO 3.
3.
CHECK ABS MOTOR AND MOTOR RELAY POWER SUPPLY CIRCUIT
1.
Turn ignition switch “OFF”.
2.
Disconnect VDC relay box connector E57.
3.
Check voltage between VDC relay box harness connector E57
and body ground.
OK or NG
OK
>> GO TO 4.
NG
>>
●
Check fuse 50 A.
●
Check that there is continuity between battery and
VDC relay box terminal No. 10.
Self-diagnosis results
PUMP MOTOR ACTUATOR RLY
10 - Ground
: Battery voltage.
SFIA2366E
TROUBLE DIAGNOSIS FOR SYSTEM
BRC-47
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
4.
CHECK MOTOR RELAY CIRCUIT
1.
Turn ignition switch “OFF”.
2.
Disconnect VDC/TCS/ABS control unit connector E218, VDC actuator connector E23 and VDC relay box
connector E55 and E56.
3.
Check continuity between VDC/TCS/ABS control unit harness
connector E218 and VDC relay box harness connector E56.
4.
Check continuity between VDC relay box harness connector
E55 and VDC actuator harness connector E23.
OK or NG
OK
>> GO TO 5.
NG
>> Check harness for open or short between VDC relay
box and VDC/TCS/ABS control unit or VDC actuator.
5.
CHECK ABS MOTOR CIRCUIT
1.
Check actuator motor by listening for its operation sound while
applying battery voltage to the VDC actuator terminal 21.
CAUTION:
To prevent overheating, do not operate actuator motor
more than 4 seconds.
OK or NG
OK
>> GO TO 6.
NG
>> Check body ground condition of VDC actuator. If condi-
tion is OK, replace VDC actuator.
6.
CHECK MOTOR RELAY UNIT
Check motor relay as a unit. Refer to
.
OK or NG
OK
>> Check VDC/TCS/ABS control unit power circuit.
NG
>> Replace motor relay.
20 - 4
: Continuity should exist.
7 - 8
: Continuity should exist.
SFIA2493E
15 - 21
: Continuity should exist.
SFIA2429E
SFIA2430E
BRC-48
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
Actuator Relay
NFS000D6
INSPECTION PROCEDURE
1.
CHECK SELF-DIAGNOSIS RESULTS
With CONSULT-II
1.
Turn ignition switch “ON”. (Do not start engine.)
2.
Select “SELF-DIAG RESULTS” mode for “VDC” with CONSULT-II.
3.
Touch “ERASE”.
4.
Turn ignition switch “OFF” and wait at least 10 seconds.
5.
Check the self-diagnostic results.
Is above displayed in the self-diagnosis display?
YES
>> GO TO 2.
NO
>> INSPECTION END
2.
CHECK CONNECTOR
1.
Turn ignition switch “OFF”.
2.
Disconnect VDC/TCS/ABS control unit connector E218 and VDC relay box connector E57. Then recon-
nect it securely.
3.
Perform VDC/TCS/ABS control unit self-diagnosis again.
Do any self-diagnosis items appear?
YES
>> GO TO 3.
NO
>> Poor connection. Repair or replace applicable connector.
3.
CHECK ACTUATOR RELAY POWER SYSTEM
1.
Turn ignition switch “OFF”.
2.
Disconnect VDC relay box connector E57.
3.
Check voltage between VDC relay box harness connector E57
and ground.
OK or NG
OK
>> GO TO 4.
NG
>>
●
Check fuse 30A.
●
Check continuity between battery and VDC relay box
harness connector E57 terminal 9. If it is not OK,
replace fuse or harness.
Self-diagnosis results
MAIN RELAY
9 - Ground
: Battery voltage
SFIA2369E
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