Golf III L4-2.0L (ABA) (1995)
EGR Valve: Testing and Inspection
With VAG
CHECKING EGR VALVE AND EGR TEMPERATURE SENSOR
REQUIREMENTS
^
Check with VAG 1551 Scan Tool (ST) in "Read Measuring Value Block" function, testing Closed Throttle Position.
^
VAG 1551 Scan Tool connected with "Read Measuring Value Block" function selected (display group 02).
-
Indicated on display
Read measuring value block 2
1 2 3 4
^
No leaks in vacuum lines and hose connections.
^
Vacuum lines not plugged or kinked.
^
Engine oil temperature min. 50°C (122°F).
PROCEDURE
-
Disconnect EGR Vacuum Regulator Solenoid Valve (N18) -1-.
-
Connect VAG 1390 vacuum pump to the disconnected hose.
-
Operate vacuum pump.
-
Performance at Closed Throttle Position must get noticeably worse.
-
If idle does not get worse:
-
Check lines and connections for obstructions and clean if necessary.
-
If necessary, replace EGR Valve.
-
If idle gets worse:
-
Read EGR temperature in display field 4. Temperature must rise steadily without interruption.
-
If display reads 127.4°C, or if the temperature drops, there is an interruption.
-
As soon as the temperature value reaches 200°C, disconnect vacuum pump.
-
Press --> button.
-
Press buttons -0- and -6- for "End Output" function.
-
Press -Q- button to confirm input.
-
If temperature does not change:
-
Perform electrical testing.
-
If no fault is found:
-
Replace EGR Temperature Sensor (G98).