Infiniti Q45 (FY33). Manual - part 251
SEF454U
SEF455U
DIAGNOSTIC PROCEDURE
INSPECTION START
CHECK THE OVERALL FUNCTION.
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Turn ignition switch “ON”.
4. Check voltage between ECM terminal
q
72
,
q
79
and ground in the following con-
ditions.
NG(*1)
NG(*2)
E
OK
INSPECTION END
q
A
(Go to next page.)
CHECK REAR WINDOW DEFOGGER
FUNCTION.
1. Start engine.
2. Turn “ON” the rear defogger switch.
3. Check the rear windshield. Is the rear
windshield heated up?
OK
E
NG
Refer to EL section (RR
window defogger).
CHECK INPUT SIGNAL CIRCUIT FOR
RR/DEF.
Check harness continuity between ECM
terminal
q
79
and terminal
q
5
.
Continuity should exist.
If OK, check harness for short to ground
and short to power.
OK
E
NG
Check the following.
I
Harness connectors
F63
,
M49
I
Joint connector-10
M60
I
Harness connectors
M4
,
B3
If NG, repair open circuit or
short to ground or short to
power in harness or con-
nectors.
Perform “TROUBLE DIAGNOSIS FOR
INTERMITTENT INCIDENT”, EC-117.
INSPECTION END
Conditions
ECM
terminal
No.
Voltage (V)
Rear window defogger
switch “ON”*1
q
79
Battery volt-
age
Headlamp “ON” at 2nd
position with low
beam*2
q
72
Except the above*1
0
GI
MA
EM
LC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS
Electrical Load Signal (Cont’d)
H
H
H
H
H
H
EC-533