TT L4-1.8L Turbo (BEA) (2004)
Relay carrier under the cover on left
Measure to
splash wall
Terminal
4
Battery Positive (B+)
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Perform the Output check diagnosis and activate the Secondary Air Injection (AIR) Pump Relay -J299- See: Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/With Manufacturer's Scan Tool/Output Diagnostic Test Mode (DTM),
(Function 03)
-
Specification: Battery voltage varying; because relay is turned on and off by ECM during output check diagnosis.
If specified value is not obtained:
-
Turn ignition off.
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Connect Test box V.A.G. 1598/31 to engine control module (ECM) harness. Do not connect ECM. See: Computers and Control Systems/Testing
and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Manufacturer's Scan Tool/Electrical Testing Using
VAG1598/31 Test Box
-
Check the following wiring connections for open circuit or short to ground (GND) and/or battery voltage (B+):
Relay carrier under the cover on left
VAG1598/31 test box
splash wall Terminal
Socket
4
66
-
If necessary, repair open or short circuits.
If no problems are found:
-
Replace Secondary Air Injection (AIR) Pump Relay -J299-.
Checking Voltage supply for Secondary Air Injection (AIR) Pump Motor -V101-
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Remove sound dampening (arrow).
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Remove connector from Secondary Air Injection (AIR) Pump Motor -V101- -1-.
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Connect the voltage tester V.A.G. 1527 B between 1 and 2.
-
Perform the Output check diagnosis and activate the Secondary Air Injection (AIR) Pump Relay -J299-. See: Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/With Manufacturer's Scan Tool/Output Diagnostic Test Mode (DTM),
(Function 03)
-
The LED must flash
If the LED does not flash:
-
Perform the following tests, indicated below:
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Check wiring harness from Secondary Air Injection (AIR) Pump Motor -V101- connector to Secondary Air Injection (AIR) Pump Relay
-J299- (under cover, left at bulkhead) for open circuit:
IMPORTANT: Check wiring harness from Secondary Air Injection (AIR) Pump Motor -V101- to Ground (GND) location in left of engine
compartment for open circuit.
If no problem is found:
-
Replace Secondary Air Injection (AIR) Pump Motor -V101-.