Infiniti Q45 (FY33). Manual - part 94

SBR371E

Diagnostic Procedure 10 (Motor relay or motor)

Code No. 61 of ABS/TCS control unit

SBR379E

SBR380E

MOTOR POWER SUPPLY CIRCUIT

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

Check 30A fusible link k

for ABS actua-

tor. For fusible link layout, refer to
POWER SUPPLY ROUTING in EL sec-
tion.

(Skip page.)

Check 7.5A fuse

. For fuse layout, refer

to POWER SUPPLY ROUTING in EL sec-
tion.

(See next 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

Inspection end

1. Disconnect ABS actuator 2-pin connec-

tor

E15

2. Check voltage between connector

(body side) terminal

and ground.

Battery voltage should exist.

Check the following.

Harness connector

E15

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

and ABS/TCS control unit con-

nector

B103

2. Check continuity between ABS/TCS

control unit connector terminals and
ABS actuator 8-pin connector

(body side) terminals.

Continuity should exist.

Check the following.

Harness connectors

B103

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

If NG, repair harness or
connectors.

(Go to next page.)

Control unit

ABS relay unit

108

IDX

TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS

BR-93

SBR376E

SBR408E

MOTOR RELAY CHECK

Replace ABS actuator.

ACTUATOR MOTOR GROUND CHECK

Refer to ABS ACTUATOR MOTOR
GROUND in Ground Circuit Check,
BR-79.

Repair harness and termi-
nals.

MOTOR CHECK

1. Disconnect ABS actuator connector.
2. Apply battery voltage to 8-pin connector

terminal

(actuator side) and ground.

MOTOR should operate.
Do not apply battery voltage more
than 5 seconds.

Replace ABS actuator.

Go to Diagnostic Procedure 11, BR-96.

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

Yes

Check the following.

Harness connector

Harness for open or
short between ABS
actuator connector and
fuse

If NG, repair harness or
connectors.

Inspection end

Relay type

ABS motor relay

Condition

Continuity exist-

ence between

terminals

and

Battery voltage

not applied

between each

terminal

and

Battery voltage

applied between

each terminal

and

Yes

Check resis-

tance between

each terminal

and

Approx. 100

Ω

TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS

Diagnostic Procedure 10 (Motor relay or motor)
(Cont’d)

BR-94

SBR381E

SBR382E

SBR383E

Replace fusible link.
Does the fusible link blow out?

Yes

Inspection end

MOTOR POWER SUPPLY CIRCUIT

1. Disconnect battery cable and ABS

actuator 2-pin connector

E15

2. Check continuity between ABS actuator

2-pin connector

E15

(body side) termi-

nal

and ground.

Continuity should not exist.

Check the following.

Harness connector

E15

Harness for open or
short between ABS
actuator and fuse

If NG, repair harness or
connectors.

1. Disconnect ABS actuator 8-pin connec-

tor and control unit connector.

2. Check continuity between ABS actuator

8-pin connector

(body side) termi-

nal

and ground.

Continuity should not exist.

Check the following.

Harness connectors

B103

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

If NG, repair harness or
connectors.

Check continuity between ABS actuator
8-pin connector

(ABS actuator side)

terminal

and ground, 2-pin connector

E15

(ABS actuator side) terminal

and

ground.
Continuity should not exist.

Replace ABS actuator.

MOTOR CHECK

Go to

in Diagnostic Procedure 10

(preceding page).

Check ABS/TCS control unit pin terminals
for damage or the connection of ABS/TCS
control unit harness connector.
Reconnect ABS/TCS control unit harness
connector. Then retest.

IDX

TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS

Diagnostic Procedure 10 (Motor relay or motor)
(Cont’d)

BR-95

SBR813DA

Diagnostic Procedure 11 (BATTERY VOLT: Low
voltage)

Code No. 57 of ABS/TCS control unit

SBR384E

1. Disconnect ABS/TCS control unit con-

nectors. Check terminals for damage or
loose connections. Then reconnect con-
nectors.

2. Carry out self-diagnosis again.

Do ABS warning lamp, TCS OFF indi-
cator activate again?

Yes

Inspection end

CONTROL UNIT POWER SUPPLY
CHECK

1. Disconnect ABS/TCS control unit con-

nector.

2. Check voltage between ABS/TCS con-

trol unit connector terminal

108

and

ground.
Battery voltage should exist when
ignition switch is turned ON.

(See below.)

CONTROL UNIT GROUND CHECK

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

Repair harness and con-
nectors.

Check ABS/TCS control unit pin terminals
for damage or the connection of ABS/TCS
control unit harness connector.
Reconnect ABS/TCS control unit harness
connector. Then retest.

Check 7.5A fuse

. Refer to POWER

SUPPLY ROUTING in EL section.

Replace fuse.

Check continuity between battery and
ABS/TCS control unit connector terminal

108

Check the following.

Harness connector

B103

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

If NG, repair harness or
connectors.

Check battery. Refer to BATTERY in EL
section.

TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS

BR-96

Content .. 92 93 94 95 ..