Infiniti G20 (P11). Manual — part 275
![](/vehicles/zatt/wheiso/zix/rofier.png)
3
CHECK EGR VOLUME CONTROL VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals and EGR volume control valve terminals as follows. Refer to Wiring
Diagram.
MTBL0389
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 4.
NG
©
Repair open circuit or short to ground or short to power in harness or connectors.
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1402 EGR FUNCTION (OPEN)
Diagnostic Procedure (Cont’d)
EC-511
![](/vehicles/zatt/wheiso/zix/xtrd.png)
4
CHECK EGR TEMPERATURE SENSOR
1. Remove EGR temperature sensor.
2. Check resistance between EGR temperature sensor terminals 1 and 2 under the following conditions.
SEF919Z
OK or NG
OK
©
GO TO 5.
NG
©
Replace EGR temperature sensor.
DTC P1402 EGR FUNCTION (OPEN)
Diagnostic Procedure (Cont’d)
EC-512
![](/vehicles/zatt/wheiso/zix/rlah.png)
5
CHECK EGR VOLUME CONTROL VALVE-I
Check resistance between EGR volume control valve terminal 2 and terminals 1, 3, terminal 5 and terminals 4, 6.
SEF588X
OK or NG
OK (With CONSULT-II)
©
GO TO 6.
OK (Without CONSULT-
II)
©
GO TO 7.
NG
©
Replace EGR volume control valve.
6
CHECK EGR VOLUME CONTROL VALVE-II
With CONSULT-II
1. Remove EGR volume control valve.
2. Reconnect ECM harness connector and EGR volume control valve harness connector.
3. Turn ignition switch “ON”.
4. Perform “EGR VOL CONT/V” in “ACTIVE TEST” mode with CONSULT-II.
5. Check that EGR volume control valve shaft moves smoothly forward and backward according to the valve opening
steps.
SEF067Y
OK or NG
OK
©
GO TO 8.
NG
©
Replace EGR volume control valve.
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1402 EGR FUNCTION (OPEN)
Diagnostic Procedure (Cont’d)
EC-513
![](/vehicles/zatt/wheiso/zix/ond.png)
7
CHECK EGR VOLUME CONTROL VALVE-II
Without CONSULT-II
1. Remove EGR volume control valve.
2. Reconnect ECM harness connector and EGR volume control valve harness connector.
3. Turn ignition switch ON and OFF.
4. Check that EGR volume control valve shaft moves smoothly forward and backward according to the ignition switch
position.
SEF560W
OK or NG
OK
©
GO TO 8.
NG
©
Replace EGR volume control valve.
8
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-146.
©
INSPECTION END
DTC P1402 EGR FUNCTION (OPEN)
Diagnostic Procedure (Cont’d)
EC-514
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