Passat Sedan V6-2792cc 2.8L DOHC (AAA) (1995)
EGR Temperature Sensor: Testing and Inspection
With VAG 1551
CHECKING EGR VALVE AND EGR TEMPERATURE SENSOR
NOTE: Checks are made using the VAG 1551 Scan Tool (ST) in "Read Measuring Value Block" function (08), with the engine running at idle
(Closed Throttle Position).
REQUIREMENTS
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Vacuum lines and hose connections free of leaks.
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Vacuum lines not blocked or kinked.
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Engine oil temperature at least 50°C (122°F).
PROCEDURE
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Connect VAG 1551 Scan Tool in "Rapid data transfer" operating mode.
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Input address word 01 for "Engine Electronics." Carry out selection with engine idling.
^
Indicated on display:
Rapid Data Transfer
HELP
Select function XX
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Input 08 to select "Read Measuring Value Block" function, and press -Q- button to confirm input.
^
Indicated on display:
Read measuring value block
HELP
Input display group number XX
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Input display group number 02 and press -Q- button to confirm input.
^
Indicated on display: (1 - 4 Display fields)
Read measuring value block 2
1 2 3 4
NOTE: If the display remains blank, refer to VAG 1551 Scan Tool operating instructions.
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Disconnect vacuum hose from EGR Valve.
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Connect VAG 1390 hand vacuum pump to EGR Valve using auxiliary hose.
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Operate pump to apply vacuum.
NOTE: Idle characteristics must deteriorate noticeably.
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If the idle characteristics DO NOT deteriorate: