Infiniti Q45 (FY33). Manual — part 221
SEF268Y
DIAGNOSTIC TROUBLE CODE CONFIRMATION
PROCEDURE
TESTING CONDITION:
I
If “DIAGNOSTIC TROUBLE CODE CONFIRMATION PRO-
CEDURE” has been previously conducted, always turn
ignition switch “OFF” and wait at least 5 seconds before
conducting the next test.
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II and
wait at least 5 seconds.
3) If 1st trip DTC is detected, go to “DIAGNOSTIC
PROCEDURE”, EC-415.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Follow the procedure “With CONSULT-II” above.
GI
MA
EM
LC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR DTC P1400
EGRC-solenoid Valve (Cont’d)
EC-413
TEC068M
TROUBLE DIAGNOSIS FOR DTC P1400
EGRC-solenoid Valve (Cont’d)
EC-414
SEF431U
SEF798W
DIAGNOSTIC PROCEDURE
INSPECTION START
CHECK POWER SUPPLY.
1. Disconnect EGRC-solenoid valve har-
ness connector.
2. Turn ignition switch “ON”.
3. Check voltage between terminal
q
1
and
ground with CONSULT-II or tester.
Voltage: Battery voltage
OK
E
NG
Check the following.
I
Harness connectors
F63
,
M49
I
Harness connectors
F80
,
F126
I
10A fuse
If NG, repair harness or
connectors.
CHECK OUTPUT SIGNAL CIRCUIT.
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM
terminal
q
10
and terminal
q
2
.
Continuity should exist.
If OK, check harness for short to ground
and short to power.
OK
E
NG
Check the following.
I
Harness connectors
F126
,
F80
If NG, repair open circuit or
short to ground or short to
power in harness or con-
nectors.
CHECK COMPONENT
(EGRC-solenoid valve).
Refer to “COMPONENT INSPECTION”
below.
OK
E
NG
Replace EGRC-solenoid
valve.
Perform “TROUBLE DIAGNOSIS FOR
INTERMITTENT INCIDENT”, EC-117.
INSPECTION END
GI
MA
EM
LC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR DTC P1400
EGRC-solenoid Valve (Cont’d)
H
H
H
H
H
EC-415
SEF799X
MEC488B
EGRC-solenoid valve
Check air passage continuity.
Perform “EGRC SOLENOID VALVE” in “ACTIVE TEST”
mode.
Condition
EGRC SOLENOID VALVE
Air passage
continuity
between
q
A
and
q
B
Air passage
continuity
between
q
A
and
q
C
ON (FLOW)
Yes
No
OFF (CUT)
No
Yes
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Check solenoid valve, following the table as shown below:
Conditions
Air passage
continuity
between
q
A
and
q
B
Air passage
continuity
between
q
A
and
q
C
12V direct current supply
between terminals
q
1
and
q
2
Yes
No
No supply
No
Yes
If NG or operation takes more than 1 second, replace the
solenoid valve.
TROUBLE DIAGNOSIS FOR DTC P1400
EGRC-solenoid Valve (Cont’d)
EC-416
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