Infiniti Q45 (FY33). Manual - part 329

SEL893U

GROUND CIRCUIT CHECK

Control unit

Terminals

Continuity

BCM

q

56

- Ground

Yes

113

- Ground

LCU01, LCU02, LCU03

and LCU04

q

14

- Ground

LCU05

q

14

- Ground

q

15

- Ground

SEL894U

SEL895U

GI

MA

EM

LC

EC

FE

AT

PD

FA

RA

BR

ST

RS

BT

HA

IDX

IVMS (LAN)

Trouble Diagnoses (Cont’d)

EL-307

SEL096V

SEL596UA

SEL896U

POWER SUPPLY CIRCUIT CHECK

Control

unit

Terminals

Ignition switch position

OFF

ACC

ON

START

BCM

104

- Ground

Battery voltage

105

- Ground

q

60

- Ground

Approx.

0V

Battery voltage

Approx.

0V

q

68

- Ground

Approx. 0V

Battery voltage

q

55

- Ground

Approx. 0V

Battery
voltage

LCU01,
LCU02,

LCU03

and

LCU04

q

15

- Ground

Battery voltage

LCU05

q

16

- Ground

Battery voltage

Note:
CONSULT-II (data monitor) may be used to check for the ignition
switch input (ACC, ON, START).

IVMS (LAN)

Trouble Diagnoses (Cont’d)

EL-308

SEL897UB

DATA LINES CIRCUIT CHECK

Data lines open circuit check

NOTE: When checking data line circuit, disconnect BCM and all

LCU connectors.

1.

Disconnect BCM and LCU connectors.

2.

Check continuity between BCM and LCU terminals.

Control unit

Terminals

Continuity

LCU

BCM

LCU01

q

3

q

70

Yes

LCU02

q

3

q

61

LCU03

q

3

q

70

LCU04

q

3

q

61

LCU05

q

22

q

67

SEL898U

SEL899U

Data lines short circuit check

1.

Disconnect BCM and all LCU connectors.

2.

Check continuity between BCM terminal and body ground.

Terminals

Continuity

q

61

- Ground

No

q

67

- Ground

q

70

- Ground

SEL900U

3.

Check voltage between BCM terminal and body ground.

Terminals

Voltage [V]

q

61

- Ground

0

q

67

- Ground

q

70

- Ground

GI

MA

EM

LC

EC

FE

AT

PD

FA

RA

BR

ST

RS

BT

HA

IDX

IVMS (LAN)

Trouble Diagnoses (Cont’d)

EL-309

Schematic

TEL751B

BCM (Body Control Module)

EL-310