Infiniti M45 (Y34). Manual — part 277
TROUBLE DIAGNOSIS
BRC-51
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
4.
SOLENOID VALVE RELAY HARNESS INSPECTION
1.
Disconnect the VDC/TCS/ABS control unit connector and the
VDC relay box harness connector and the steering angle sensor
connector.
2.
Check the continuity between the VDC/TCS/ABS control unit
connector and the VDC relay box harness connector.
OK or NG
OK
>> GO TO 5.
NG
>> Open or short in harness. Repair or replace the harness.
5.
SOLENOID VALVE RELAY INSPECTION
Independently check the VDC actuator relay. Refer to
OK or NG
OK
>> Replace VDC actuator assembly.
NG
>> Replace the VDC relay box.
Inspection 10 Stop Lamp Switch System
AFS001KE
INSPECTION PROCEDURE
1.
SELF-DIAGNOSIS RESULT CHECK
Check self-diagnosis results.
Is the above displayed in the self-diagnosis display items?
YES
>> GO TO 2.
NO
>> Inspection End
2.
CONNECTOR INSPECTION
1.
Disconnect the stop lamp switch connector and VDC/TCS/ABS control unit connector and check the ter-
minals for deformation, disconnection, looseness, and so on. If there is an error, repair or replace the ter-
minal.
2.
Securely reconnect the connectors.
3.
Start engine.
4.
Repeat pumping brake pedal carefully several times, then perform self-diagnosis again.
OK or NG
OK
>> The connector terminal contact is loose, damaged, open or shorted.
NG
>> GO TO 3.
SFIA1935E
VDC/TCS/ABS control unit
(Harness connector E218)
VDC relay box
(Harness connector E56)
Continuity
2 (SB)
5 (SB)
Continuity should exist.
36 (GY/R)
7 (GY/R)
Continuity should exist.
Self-diagnosis results
STOP LAMP SW
BRC-52
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
3.
STOP LAMP SWITCH INSPECTION
1.
Turn ignition switch OFF and disconnect the VDC/TCS/ABS
control unit connector.
2.
Check the voltage between the VDC/TCS/ABS control unit har-
ness connector terminal 48 (R/W) and the ground.
OK or NG
OK
>> Connect the connectors and conduct a VDC/TCS/ABS
control unit self-diagnosis.
NG
>> Open or short in harness. Repair or replace the harness.
Inspection 11 VDC/TCS/ABS Control Unit Power and Ground Systems
AFS001KF
INSPECTION PROCEDURE
1.
SELF-DIAGNOSIS RESULT CHECK
Check self-diagnosis results.
Is the above displayed in the self-diagnosis item?
YES
>> GO TO 2.
NO
>> Inspection End
2.
CONNECTOR INSPECTION
1.
Disconnect the VDC/TCS/ABS control unit connector and check the terminal for deformation, disconnec-
tion, looseness, and so on. If there is an error, repair or replace the terminal.
2.
Securely reconnect the connector and Re-conduct self-diagnosis.
OK or NG
OK
>> The connector terminal contact is loose, damaged, open or shorted.
NG
>> GO TO 3.
48 (R/W) - Ground
Brake pedal depressed:
Battery voltage (approx. 12V)
Brake pedal not depressed
: Approx. 0V
SFIA1936E
Self-diagnosis results
LOW POWER VOLTAGE
TROUBLE DIAGNOSIS
BRC-53
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
3.
VDC/TCS/ABS CONTROL UNIT POWER AND GROUND CIRCUIT INSPECTION
1.
Disconnect the VDC/TCS/ABS control unit connector.
2.
With the ignition switch turned on and off, check the voltage and
continuity between the VDC/TCS/ABS control unit harness con-
nector and the ground.
OK or NG
OK
>> Check the battery (terminal looseness, low voltage, etc.) For any non-standard condition. If any
non-standard condition exists, recharge or replace the battery as necessary.
NG
>> The corresponding harness circuit is open or shorted. Repair the circuit.
SFIA1937E
Signal name
VDC/TCS/ABS control unit
(Harness connector E218)
Ground
Measured value
Power supply
1 (GY)
—
Battery voltage (Approx. 12V)
SFIA1938E
Signal name
VDC/TCS/ABS control unit
(Harness connector E218)
Ground
Measured value
Ground
27 (B)
—
Continuity should exist.
28 (B)
—
Continuity should exist.
29 (B)
—
Continuity should exist.
33 (B)
—
Continuity should exist.
BRC-54
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Inspection 12 VDC/TCS/ABS Control Unit 2
AFS001KG
INSPECTION PROCEDURE
1.
SELF-DIAGNOSIS RESULT CHECK
Check self-diagnosis results.
When any item other than “emergency brake” is indicated in self-diagnosis display, follow the instructions
below.
CAUTION:
“Emergency brake” is indicated when control unit itself is detected as an error. If this display item is
indicated, replace control unit.
Is the above displayed in the self-diagnosis display items?
YES
>> Replace the VDC/TCS/ABS control unit and re-conduct the self-diagnosis.
NO
>> Inspection End
Inspection 13 Brake Fluid Level Sensor System
AFS001KH
INSPECTION PROCEDURE
1.
SELF-DIAGNOSIS RESULT CHECK
1.
Check the brake reservoir tank fluid level. If the level is low, add brake fluid.
2.
Erase the self-diagnosis results and check the self-diagnosis results.
Is the above displayed in the self-diagnosis display items?
YES
>> GO TO 2.
NO
>> Inspection End
2.
CONNECTOR INSPECTION
1.
Disconnect the brake fluid level sensor connector and VDC/TCS/ABS control unit connector and check
the terminal for deformation, disconnection, looseness, and so on. If there is any non-standard condition,
repair or replace the terminal.
2.
Securely reconnect the connectors and Re-conduct self-diagnosis.
OK or NG
OK
>> The connector terminal contact is loose, damaged, open or shorted.
NG
>> GO TO 3.
Self-diagnosis results
EMERGENCY BRAKE
Self-diagnosis results
BRAKE FLUID LEVEL LOW
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