TT L4-1.8L Turbo (BEA) (2004)
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To measure voltage connect multimeter as follows:
Relay carrier under cover on left
Measure to
bulkhead, terminal
5
Battery voltage (B+)
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Switch ignition on.
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Specified value: approx. battery voltage (B+)
If specified value is not obtained:
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Switch ignition off.
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Connect test box V.A.G 1598/31 to wiring harness for ECM; 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
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Check following wire connections for open circuit and short circuit to Ground (GND) and B+:
Relay carrier under cover on left
VAG 1598/31 Test Box
bulkhead, terminal
Socket
5
21
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Repair open circuit, if necessary.
If no malfunction is detected:
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Replace the Motronic Engine Control Module (ECM) Power Supply Relay -J271-.