Infiniti M45 (Y34). Manual — part 417
DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-357
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Wiring Diagram
ABS002KS
TBWA0292E
EC-358
DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic Procedure
ABS002KT
1.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF.
2.
Loosen and retighten two ground screws.
Refer to
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
2.
CHECK CONNECTOR
1.
Disconnect EVAP control system pressure sensor harness connector.
2.
Check sensor harness connector for water.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace harness connector.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
89
B
Sensor ground
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 0V
103
L
Sensor power supply
[Ignition switch: ON]
Approximately 5V
110
G
EVAP control system pres-
sure sensor
[Ignition switch: ON]
Approximately 1.8 - 4.8V
PBIB1118E
Water should not exist.
PBIB0026E
DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-359
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EC
3.
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.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors B401, B251
●
Harness connectors B211, M141
●
Harness connectors M135, F105
●
Harness for open or short between EVAP control system pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND
SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check harness continuity between EVAP control system pressure sensor terminal 3 and ECM terminal
89.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 6.
6.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors B401, B251
●
Harness connectors B211, M141
●
Harness connectors M135, F105
●
Joint connector-30
●
Harness for open or short between EVAP control system pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
Voltage: Approximately 5V
PBIB0155E
Continuity should exist.
EC-360
DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
7.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND
SHORT
1.
Check harness continuity between ECM terminal 110 and EVAP control system pressure sensor terminal
2.
Refer to Wiring Diagram.
2.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 9.
NG
>> GO TO 8.
8.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors B401, B251
●
Harness connectors B211, M141
●
Harness connectors M135, F105
●
Harness for open or short between EVAP control system pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
9.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR SHIELD CIRCUIT FOR OPEN AND SHORT
1.
Disconnect harness connectors B401, B251.
2.
Check the following continuity between harness connector B251 terminal 5 and ground.
Refer to Wiring Diagram.
3.
Also check harness for short to power.
OK or NG
OK
>> GO TO 11.
NG
>> GO TO 10.
10.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors B401, B251
●
Harness connectors B211, M141
●
Harness connectors M135, F105
●
Joint connector-28
●
Joint connector-29
●
Harness for open or short between harness connector B251 terminal 5 and ground
>> Repair open circuit or short to power in harness or connectors.
11.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to
EC-361, "Component Inspection"
OK or NG
OK
>> GO TO 12.
NG
>> Replace EVAP control system pressure sensor.
Continuity should exist.
Continuity should exist.
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