Infiniti M45 (Y34). Manual - part 276

TROUBLE DIAGNOSIS

BRC-47

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

4. 

CHECKING ACTUATOR SOLENOID

1.

Disconnect VDC relay box harness connector E21, E22 and E23.

2.

Check resistance of VDC actuator solenoid.

OK or NG

OK

>> Perform VDC/TCS/ABS control unit self-diagnosis again.

NO

>> Replace VDC actuator assembly.

SFIA1932E

VDC actuator

(Harness connector E21,E22)

VDC actuator

(Harness connector E23)

Resistance value

7 (L/W)

19 (L/R)

6.0 - 11 

Ω

3 (W/G)

19 (L/R)

6.0 - 11 

Ω

5 (P)

19 (L/R)

6.0 - 11 

Ω

1 (G/Y)

19 (L/R)

6.0 - 11 

Ω

17 (BR)

19 (L/R)

3.0 - 5.0 

Ω

15 (R/Y)

19 (L/R)

3.0 - 5.0 

Ω

16 (LG)

19 (L/R)

3.0 - 5.0 

Ω

14 (Y/G)

19 (L/R)

3.0 - 5.0 

Ω

27 (PU)

19 (L/R)

3.0 - 5.0 

Ω

28 (W)

19 (L/R)

3.0 - 5.0 

Ω

25 (R/G)

19 (L/R)

6.0 - 11 

Ω

26 (W/R)

19 (L/R)

6.0 - 11 

Ω

BRC-48

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS

Inspection 8 ABS Motor and Motor Relay System

AFS001KC

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 VDC relay box connector E55, E56, E57 and VDC/TCS/ABS control unit connector and
check the terminals for deformation, disconnection, looseness, and so on. If there is an error, repair or
replace the terminal.

2.

Securely reconnect the connectors and conduct self-diagnosis.

OK or NG

OK

>> The connector terminal contact is loose, damaged, open or shorted.

NG

>> GO TO 3.

3. 

ABS MOTOR AND MOTOR RELAY POWER SYSTEM INSPECTION

1.

Disconnect the VDC relay box connectors.

2.

Check the voltage between the VDC relay box harness connec-
tor E57 terminal 10(W/G) and the ground.

OK or NG

OK

>> GO TO 4.

NG

>> The circuit between the battery and the VDC relay box terminal 10 is open or shorted. Repair the

circuit.

Self-diagnosis results

Pump motor, motor relay system

SFIA0981E

VDC relay box

(Harness connector E57)

Body ground

Voltage

10 (W/G)

—

Battery voltage (approx. 12V)

TROUBLE DIAGNOSIS

BRC-49

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

4. 

ABS MOTOR AND MOTOR RELAY HARNESS INSPECTION

1.

Turn ignition switch OFF and disconnect the VDC/TCS/ABS
control unit connector and VDC relay box harness connector.

2.

Check the continuity between the VDC/TCS/ABS control unit
harness connector and the VDC relay box harness connector.

3.

Check if the actuator motor operates when a 12V voltage is applied to the VDC relay box harness connec-
tor terminal 15.

CAUTION:

Operate the actuator motor for 4 seconds or less to prevent
heat generation.

OK or NG

OK

>> GO TO 5.

NG

>> The actuator motor or actuator motor circuit open or short in harness. Repair or replace the actua-

tor motor or actuator motor circuit harness.

5. 

ABS MOTOR RELAY INSPECTION

ABS motor relay independent inspection. Refer to 

BRC-48, "Inspection 8 ABS Motor and Motor Relay System"

.

OK or NG

OK

>> Replace VDC actuator assembly.

NG

>> Replace the VDC relay box.

SFIA1933E

VDC/TCS/ABS control unit

(Harness connector E218)

VDC relay box

(Harness connector E56)

Continuity

20 (R/B)

4 (R/B)

Continuity should exist.

7 (G/W)

8 (G/W)

Continuity should exist.

SFIA1934E

BRC-50

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS

Inspection 9 Solenoid Valve Relay System

AFS001KD

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 VDC relay box harness connector E55, E56, E57 and VDC/TCS/ABS control unit connec-
tor and check the terminals for deformation, disconnection, looseness, and so on. If there is an error,
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.

3. 

SOLENOID VALVE RELAY POWER SYSTEM INSPECTION

1.

Turn ignition switch OFF and disconnect the VDC relay box har-
ness connector.

2.

Check the voltage between the VDC relay box harness connec-
tor terminal 9(L/Y) and the ground.

OK or NG

OK

>> GO TO 4.

NG

>> The circuit between the battery and relay unit terminal 9 is open or shorted. Repair the circuit.

Self-diagnosis results

MAIN RELAY

SFIA0984E

VDC relay box

(Harness Connector E57)

Body ground 

Voltage

9 (L/Y)

—

Battery voltage (approx. 12V)