Infiniti G20 (P11). Manual — part 247
Wiring Diagram
NCEC0550
TEC713
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0450 EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM PRESSURE
SENSOR
Wiring Diagram
EC-399
Diagnostic Procedure
NCEC0551
1
CHECK RUBBER TUBE
1. Turn ignition switch “OFF”.
2. Check rubber tube connected to the EVAP control system pressure sensor for clogging, vent, kink, disconnection or
improper connection.
SEF860X
OK or NG
OK
©
GO TO 2.
NG
©
Reconnect, repair or replace.
2
RETIGHTEN GROUND SCREWS
Loosen and retighten engine ground screws.
SEF839X
©
GO TO 3.
3
CHECK CONNECTOR
1. Disconnect EVAP control system pressure sensor harness connector.
2. Check sensor harness connector for water.
Water should not exist.
OK or NG
OK
©
GO TO 4.
NG
©
Repair or replace harness connector.
DTC P0450 EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM PRESSURE
SENSOR
Diagnostic Procedure
EC-400
4
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “ON”.
2. Check voltage between EVAP control system pressure sensor terminal 1 and ground with CONSULT-II or tester.
SEF341X
OK or NG
OK
©
GO TO 6.
NG
©
GO TO 5.
5
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors T19, T20
I
Harness connectors B113, T1
I
Harness connectors B10, B120
I
Harness connectors B3, M8
I
Harness connectors F24, M62
I
Harness for open or short between EVAP control system pressure sensor and ECM
©
Repair harness or connectors.
6
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Check harness continuity between EVAP control system pressure sensor terminal 3 and engine ground.
Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK
©
GO TO 8.
NG
©
GO TO 7.
7
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors T19, T20
I
Harness connectors B113, T1
I
Harness connectors B102, M74
I
Harness connectors F23, M49
I
Harness for open or short between EVAP control system pressure sensor and ECM
I
Harness for open or short between EVAP control system pressure sensor and TCM (Transmission Control Module)
©
Repair open circuit 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 P0450 EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM PRESSURE
SENSOR
Diagnostic Procedure (Cont’d)
EC-401
8
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND
SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 84 and EVAP control system pressure sensor terminal 2.
Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK (With CONSULT-II)
©
GO TO 10.
OK (Without CONSULT-
II)
©
GO TO 11.
NG
©
GO TO 9.
9
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors T19, T20
I
Harness connectors B113, T1
I
Harness connectors B102, M74
I
Harness connectors F23, M49
I
Harness for open or short between ECM and EVAP control system pressure sensor
©
Repair open circuit or short to ground or short to power in harness or connectors.
10
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT-II
1. Start engine.
2. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT-II. Check that engine speed varies according
to the valve opening.
SEF801Y
OK or NG
OK
©
GO TO 12.
NG
©
GO TO 11.
DTC P0450 EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM PRESSURE
SENSOR
Diagnostic Procedure (Cont’d)
EC-402
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