Infiniti Q45. Manual — part 271
TROUBLE DIAGNOSIS FOR SYSTEM
BRC-49
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
4.
CHECK ACTUATOR RELAY POWER CIRCUIT
1.
Turn ignition switch “OFF”.
2.
Disconnect VDC/TCS/ABS control unit connector and VDC relay box connector E56.
3.
Check continuity between VDC/TCS/ABS control unit harness
connector E218 and VDC relay box harness connector E56.
OK or NG
OK
>> GO TO 5.
NG
>> Open or short in harness between VDC/TCS/
ABS control unit and VDC relay box.
5.
CHECK ACTUATOR RELAY UNIT
Check solenoid valve relay as a unit. Refer to
OK or NG
OK
>> Check VDC/TCS/ABS control unit power circuit.
NG
>> Replace solenoid valve relay.
Stop Lamp Switch
NFS000D7
INSPECTION PROCEDURE
1.
CHECKING 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 stop lamp switch connector M402 and VDC/TCS/ABS control unit connector E218.
3.
Reconnect connectors securely.
4.
Start engine.
5.
Repeat pumping brake pedal carefully several times, then perform self-diagnosis again.
Do any self-diagnosis items appear?
YES
>> GO TO 3.
NO
>> Poor connection. Repair or replace applicable connector.
2 - 5
: Continuity should exist.
36 - 7
: Continuity should exist.
SFIA2370E
Self-diagnosis results
STOP LAMP SW
BRC-50
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
3.
CHECK STOP LAMP SWITCH CIRCUIT
1.
Turn ignition switch “OFF”.
2.
Disconnect VDC/TCS/ABS control unit harness connector.
3.
Check continuity between VDC/TCS/ABS control unit harness
connector E218 terminal 48 and ground.
OK or NG
OK
>> Re-perform self-diagnosis.
NG
>> Open or short in harness between VDC/TCS/ABS control unit and stop lamp switch
VDC/TCS/ABS Control Unit Power Supply And Ground Circuit
NFS000D8
INSPECTION PROCEDURE
1.
CHECKING SELF-DIAGNOSIS RESULT
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 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. Then reconnect it securely.
3.
Perform self-diagnosis.
Do any self-diagnosis items appear?
YES
>> GO TO 3.
NO
>> Poor connection. Repair or replace applicable connector.
VDC/TCS/ABS control
unit
Measurement condi-
tion
Voltage
48 - Ground
Brake pedal
depressed
Battery voltage
(Approx.12 V)
Brake pedal not
depressed
Approx 0 V
SFIA2450E
Self-diagnosis results
LOW POWER VOLTAGE
TROUBLE DIAGNOSIS FOR SYSTEM
BRC-51
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
3.
CHECK VDC/TCS/ABS CONTROL UNIT POWER AND GROUND CIRCUIT
1.
Turn ignition switch “OFF”.
2.
Disconnect VDC/TCS/ABS control unit connector.
3.
Turn ignition switch ON or OFF and check voltage and continuity
between VDC/TCS/ABS control unit harness connector E218
and body ground.
OK or NG
OK
>> Check battery for loose terminal and low voltage mal-
function. Repair if necessary.
NG
>> Corresponding harness circuit malfunction. Repair cir-
cuit.
Park/Neutral Position Switch
NFS000D9
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
VDC/TCS/ABS
control unit
Condition
Voltage (Approx.)
1 - Ground
Ignition switch ON
Battery voltage
(Approx.12 V)
Ignition switch OFF
Approx 0 V
SFIA2372E
VDC/TCS/ABS
control unit
Condition
Continuity
27 - Ground
Ignition switch OFF
Yes
28 - Ground
29 - Ground
33 - Ground
SFIA2333E
Self-diagnosis results
SHIFT POSITION ERROR
BRC-52
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
2.
CHECK DATA MONITOR
With CONSULT-II
1.
Connect CONSULT-II. Start engine.
2.
In “DATA MONITOR” select “ITEM MENU” and then check P position.
OK or NG
OK
>> Perform VDC/TCS/ABS control unit self-diagnosis again.
NG
>> GO TO 3.
3.
CHECK A/T PARK/NEUTRAL POSITION SWITCH
Perform Park/Neutral position switch inspection. Refer to
AT-107, "DTC P0705 PARK/NEUTRAL POSITION
Do any self-diagnosis items appear?
YES
>> Repair indicated items and perform VDC/TCS/ABS control unit self-diagnosis again.
NO
>> Perform VDC/TCS/ABS control unit self-diagnosis again.
Selector lever position
Position
(Data monitor)
P position
ON
Other than P position.
OFF
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