Golf L4-2.0L (ABA) (1996)
EGR Temperature Sensor: Testing and Inspection
Check With VAG 1551 Scan Tool In "Read Measuring Value Block" Function, Testing Closed Throttle Position.
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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
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No leaks in vacuum lines and hose connections
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Vacuum lines not plugged or kinked
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Engine oil temperature min. 50°C (122°F)
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Disconnect EGR Vacuum Regulator Solenoid Valve (N18) -1-.
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Connect VAG 1390 vacuum pump to the disconnected hose.
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Operate vacuum pump.
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Performance at Closed Throttle Position must get noticeably worse.
If NO:
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Check lines and connections for obstructions and clean if necessary.
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If necessary, Replace EGR Valve.
If Idle Gets Worse:
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Read EGR temperature in display field 4. Temperature must rise steadily without interruption.
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If display reads 127.4°C, or if the temperature drops, there is an interruption.
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As soon as the temperature value reaches 200°C, disconnect vacuum pump.
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Press -> button.
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Press buttons -and -6- for "End Output" Function.
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Press -Q- button to confirm input.
If no fault is found:
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Replace EGR Temperature Sensor (G98).