Infiniti Q45 (FY33). Manual - part 93

 

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Infiniti Q45 (FY33). Manual - part 93

 

 

SBR371E

Diagnostic Procedure 8 (ABS actuator solenoid
valve)

Code No. 41, 45, 55, 42, 46, 56 of ABS/TCS control unit

SBR372E

SBR373E

1. Disconnect connectors from ABS/TCS

control unit, ABS actuator and ABS
relay unit. Check terminals for damage
or loose connections. Then reconnect
connectors.

2. Carry out self-diagnosis again.

Do ABS/TCS warning lamp and TCS
OFF indicator activate again?

Yes

E

No

Inspection end

ABS ACTUATOR SOLENOID VALVE
CHECK

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

1. Disconnect connectors from ABS/TCS

control unit.

2. Check resistance between ABS/TCS

control unit connector terminals and
ground.

NG

E

OK

Go to Diagnostic Proce-
dure 9. (See next page.)

1. Disconnect ABS actuator 8-pin connec-

tor.

2. Check resistance between ABS actua-

tor 8-pin connector

F8

(ABS actuator

side) terminals and ABS actuator 8-pin
connector

F7

or

F8

(ABS actuator

side) terminal.

NG

E

OK

Check the following.

I

Harness connectors

B103

,

F8

,

F7

I

Harness for open or
short between ABS
actuator connector and
ABS/TCS control unit
connector

I

Harness for open or
short between ABS
actuator and ground

If NG, repair harness or
connectors.

Check resistance between solenoid valve
terminals

q

1

,

q

25

,

q

2

,

q

26

,

q

3

,

q

27

.

Resistance: 8.1 - 16.0

NG

E

OK

Check the following.

I

Harness connector

F7

,

E15

,

F8

I

Harness for open or
short between actuator
connector terminals

If NG, repair harness or
connectors.

Replace actuator.

Code No.

Control

unit

Ground

Resis-

tance

41

104

2.9 - 6.0

45

106

55

105

42

101

5.2 -

10.0

46

103

56

102

Code No.

ABS actuator

Resis-

tance

F7

,

F8

F8

41

q

26

q

21

2.9 - 6.0

45

q

25

q

21

55

q

27

q

21

42

q

2

q

21

5.2 -

10.0

46

q

1

q

21

56

q

3

q

21

GI

MA

EM

LC

EC

FE

AT

PD

FA

RA

ST

RS

BT

HA

EL

IDX

TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS

H

H

H

H

BR-89

SBR371E

Diagnostic Procedure 9 (Solenoid valve relay)

Code No. 63 of ABS/TCS control unit

SOLENOID VALVE POWER SUPPLY
CHECK

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Check 30A fusible link j . For fusible link
layout, refer to POWER SUPPLY ROUT-
ING in EL section.

OK

E

NG

q

A

(Skip page.)

Check 7.5A fuse

31

. For fuse layout, refer

to POWER SUPPLY ROUTING in EL sec-
tion.

OK

E

NG

q

B

(Skip page.)

1. Disconnect connectors from ABS/TCS

control unit and ABS actuator. Check
terminals for damage or loose connec-
tion. Then reconnect connectors.

2. Carry out self-diagnosis again.

Do ABS warning lamp and TCS OFF
indicator activate again?

Yes

E

No

Inspection end

GROUND CIRCUIT CHECK

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Refer to ABS/TCS CONTROL UNIT
GROUND and ABS ACTUATOR GROUND
in Ground Circuit Check, BR-79.

OK

E

NG

Repair harness and con-
nectors.

q

C

TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS

H

H

H

H

BR-90

SBR375E

SBR374E

SBR376E

q

C

SOLENOID VALVE POWER SUPPLY
CHECK

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

1. Disconnect connectors from ABS actua-

tor.

2. Check voltage between ABS actuator

2-pin connector

E15

(body side) termi-

nal

q

9

and ground.

Battery voltage should exist.

OK

E

NG

Check the following.

I

Harness connector

E15

I

Harness for open or
short between ABS
actuator and fuse

If NG, repair harness or
connectors.

CIRCUIT CHECK

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

1. Disconnect ABS actuator 8-pin connec-

tor

F7

,

F8

and ABS/TCS control

unit connectors

B103

.

2. Check continuity between ABS/TCS con-

trol unit connector terminals and ABS
actuator 8-pin connector

F7

(body

side) terminals.

Continuity should exist.

OK

E

NG

Check the following.

I

Harness connectors

F7

,

B103

,

F8

I

Harness for open or short
between ABS actuator
terminal (body side) and
ABS/TCS control unit

If NG, repair harness or
connectors.

SOLENOID VALVE RELAY CHECK

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

OK

E

NG

Replace ABS actuator.

Go to Diagnostic Procedure 8, BR-89.

Control unit

ABS actuator

q

7

q

7

108

q

5

q

22

q

11

Condition

Continuity exist-

ence between

terminals

q

6

and

q

21

Battery voltage

not applied

between each

terminal

q

5

and

q

7

Yes

Battery voltage

applied between

each terminal

q

5

and

q

7

No

Check resis-

tance between

each terminal

q

5

and

q

7

Approx. 100

GI

MA

EM

LC

EC

FE

AT

PD

FA

RA

ST

RS

BT

HA

EL

IDX

TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS

Diagnostic Procedure 9 (Solenoid valve relay)
(Cont’d)

H

H

H

H

BR-91

SBR377E

SBR378E

q

A

Replace fusible link.
Does the fusible link blow out?

Yes

E

No

Inspection end

RELAY POWER SUPPLY CIRCUIT

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

1. Disconnect ABS actuator 2-pin connec-

tor

E15

.

2. Check continuity between ABS actuator

2-pin connector

E15

(body side) termi-

nal

q

9

and ground.

Continuity should not exist.

OK

E

NG

Check the following.

I

Harness connector

E15

I

Harness for open or
short between ABS
actuator and fuse

If NG, repair harness or
connectors.

1. Disconnect ABS actuator connectors

and control unit connector.

2. Check continuity between ABS actuator

6-pin connector

F7

(ABS actuator

side) terminal

q

6

and ground.

Continuity should exist.

OK

E

NG

Replace ABS actuator.

Go to Diagnostic Procedure 8, BR-89.

q

B

Replace fuse.
Does the fuse blow out when ignition
switch is turned “ON”?

No

E

Yes

Check the following.

I

Harness connector

F8

I

Harness for open or
short between ABS
actuator connector and
fuse

If NG, repair harness or
connectors.

Inspection end

TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS

Diagnostic Procedure 9 (Solenoid valve relay)
(Cont’d)

H

H

H

H

H

H

BR-92

 

 

 

 

 

 

 

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