Infiniti I35 (A33). Manual — part 302

SEF800YB

GI

MA

EM

LC

FE

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Wiring Diagram (Cont’d)

EC-549

Diagnostic Procedure

NHEC1095

1

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.
2. Disconnect EVAP canister purge volume control solenoid valve harness connector.

SEC929C

3. Turn ignition switch ON.
4. Check voltage between EVAP canister purge volume control solenoid valve terminal 2 and ground with CONSULT-II or

tester.

SEC062D

Voltage: Battery voltage

OK or NG

OK

©

GO TO 3.

NG

©

GO TO 2.

2

DETECT MALFUNCTIONING PART

Check the following.

I

Harness connectors E15, F18

I

Harness connectors F56, F197

I

Harness for open or short between EVAP canister purge volume control solenoid valve and ECM relay

©

Repair harness or connectors.

3

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT
FOR OPEN AND SHORT

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 10 and EVAP canister purge volume control solenoid valve terminal 1.

Refer to Wiring Diagram.

Continuity should exist.

4. Also check harness for short to ground and short to power.

OK or NG

OK

©

GO TO 5.

NG

©

GO TO 4.

DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Diagnostic Procedure

EC-550

4

DETECT MALFUNCTIONING PART

Check the following.

I

Harness connectors F197, F56

I

Harness for open or short between ECM and EVAP canister purge volume control solenoid valve

©

Repair open circuit or short to ground or short to power in harness or connectors.

5

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR HOSE

Check disconnection or improper connection of hose connected to EVAP control system pressure sensor.

SEF495R

OK or NG

OK

©

GO TO 6.

NG

©

Repair it.

6

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR

1. Disconnect EVAP control system pressure sensor harness connector.
2. Check connectors for water.

Water should not exist.

OK or NG

OK

©

GO TO 7.

NG

©

Replace EVAP control system pressure sensor.

GI

MA

EM

LC

FE

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Diagnostic Procedure (Cont’d)

EC-551

7

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

1. Remove EVAP control system pressure sensor with its harness connector connected.

CAUTION:

Never apply force to the air hole protector of the sensor if equipped.

SEF799W

2. Remove hose from EVAP control system pressure sensor.
3. Turn ignition switch ON.
4. Use pump to apply vacuum and pressure to EVAP control system pressure sensor as shown in figure.

CAUTION:

I

Always calibrate the vacuum pump gauge when using it.

I

Do not apply below −20 kPa (−150 mmHg, −5.91 inHg) or over 20 kPa (150 mmHg, 5.91 inHg) of pressure.

5. Check input voltage between ECM terminal 60 and ground.

SEC908C

MTBL1159

CAUTION:

Discard and EVAP control system pressure sensor which has been dropped from a height of more than 0.5 m
(19.7 in) onto a hard surface such as a concrete floor; use a new one.

OK or NG

OK (With CONSULT-II)

©

GO TO 8.

OK (Without CONSULT-
II)

©

GO TO 9.

NG

©

Replace EVAP control system pressure sensor.

DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Diagnostic Procedure (Cont’d)

EC-552