EGR VALVE POSITION SENSOR INSPECTION [MZ-CD 1.6 (Y6)]

id0140b2807600

Осторожно
•  Water penetrating the connector will cause sensor malfunction. To prevent this, be careful not to damage the wiring harnesses or the waterproof connector so as to cause water penetration.
Примечание
•  Before performing the following inspection, make sure to follow the procedure as indicated in the troubleshooting flowchart. (See ПОРЯДОК ИСПОЛЬЗОВАНИЯ ДАННОГО РУКОВОДСТВА.)

Visual Inspection

1.  Remove the EGR valve. (See СНЯТИЕ И УСТАНОВКА КЛАПАНА EGR [MZ-CD 1.6 (Y6)].)

2.  Verify that there are no metal shavings on the sensor.

3.  Visually inspect the EGR valve for the following:

•  Damage
•  Cracks
•  Rusted sensor terminal
•  Bent sensor terminal
―  If there is any malfunction, replace the EGR valve.

4.  Install the EGR valve. (See СНЯТИЕ И УСТАНОВКА КЛАПАНА EGR [MZ-CD 1.6 (Y6)].)


Voltage Inspection

1.  Turn the engine switch to the ON position.

2.  Measure the voltage between EGR valve position sensor terminal B and body ground.

am3zzw00008233

•  If it is not as specified, “Circuit Open/Short Inspection”.
―  If there is no open/short circuit, replace the EGR valve.

EGR valve position sensor signal voltage (reference)

Engine speed (rpm)

Voltage (V)
KOEO
Approx. 0.9
KOER (Idle)
Approx. 2.8
KOER (2,000)


Resistance Inspection

1.  Disconnect the EGR valve connector.

2.  Measure the resistance between EGR valve terminals.

am3zzw00008234

•  If not as specified, replace the EGR valve.

EGR valve position sensor resistance (reference)

Terminal

Resistance (kilohm)
A—E
Approx. 6.0
A—B
Approx. 6.0
B—E
1.0 or less


Circuit Open/Short Inspection

1.  Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].)

2.  Inspect the following wiring harness for an open or short circuit (continuity check).

am3zzw00008235


Open circuit

•  If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
―  EGR valve terminal A and PCM terminal 121
―  EGR valve terminal B and PCM terminal 129
―  EGR valve terminal E and PCM terminal 201


Short circuit

•  If there is continuity, there is a short circuit. Repair or replace the wiring harness.
―  EGR valve terminal A and power supply
―  EGR valve terminal A and body ground
―  EGR valve terminal B and power supply
―  EGR valve terminal B and body ground
―  EGR valve terminal E and power supply
―  EGR valve terminal E and body ground