Infiniti Q45 (FY33). Manual — part 218
![](/vehicles/zatt/fitanyou/tushi/gift.png)
TEC035M
GI
MA
EM
LC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR DTC P1320
Ignition Signal (Cont’d)
EC-401
![](/vehicles/zatt/fitanyou/tushi/pore.png)
TEC036M
TROUBLE DIAGNOSIS FOR DTC P1320
Ignition Signal (Cont’d)
EC-402
![](/vehicles/zatt/fitanyou/tushi/zay.png)
TEC037M
GI
MA
EM
LC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR DTC P1320
Ignition Signal (Cont’d)
EC-403
![](/vehicles/zatt/fitanyou/tushi/ybu.png)
SEF393WA
SEF893V
SEF892V
SEC202B
DIAGNOSTIC PROCEDURE
INSPECTION START
Start engine.
Is engine running?
No
E
Yes
Go to
“SEARCH FOR
MALFUNCTIONING CIR-
CUIT” on next page.
CHECK POWER SUPPLY-1.
1. Turn ignition switch “OFF”.
2. Disconnect ECM relay.
3. Check voltage between terminals
q
2
,
q
7
and ground with CONSULT-II or
tester.
Voltage: Battery voltage
OK
E
NG
Check the following.
I
Harness connectors
F1
,
E14
I
Harness connectors
F2
,
E13
I
10A fuse
I
7.5A fuse
I
Harness for open or
short between battery
and ECM relay
If NG, repair harness or
connectors.
CHECK OUTPUT SIGNAL CIRCUIT-1.
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM
terminal
124
and terminal
q
1
.
Continuity should exist.
If OK, check harness for short to
ground and short to power.
OK
E
NG
Repair open circuit or short
to ground or short to power
in harness or connectors.
CHECK ECM RELAY.
1. Apply 12V direct current between relay
terminals
q
1
and
q
2
.
2. Check continuity between relay termi-
nals
q
3
and
q
5
,
q
7
and
q
6
.
12V (
q
1
-
q
2
) applied:
Continuity exists.
No voltage applied:
No continuity
OK
E
NG
Replace ECM relay.
1. Reconnect ECM relay and ECM har-
ness connector.
2. Go to
“CHECK POWER SUP-
PLY-2” on next page.
TROUBLE DIAGNOSIS FOR DTC P1320
Ignition Signal (Cont’d)
H
H
H
H
H
EC-404
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