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
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