volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

With Manufacturer's Scan Tool|Page 4772 > < With Manufacturer's Scan Tool|Page 4770
Page 4
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Connect VAG1598/22 test box to control module wiring harness connector.

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Check wiring between test box and 4-pin harness connector for open circuit according to wiring diagram.
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Terminal 1 + socket 71

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Terminal 3 + socket 78

Wire resistance: max. 1.5 ohms

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Also, check if wires are shorted together.
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Terminal -3- + socket 71

Specified value: Infinity ohms

If no malfunction is found in the wiring and voltage was present between terminals -2- + -4-:

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Replace Engine Control Module (ECM).

Checking secondary winding

With Manufacturer's Scan Tool|Page 4772 > < With Manufacturer's Scan Tool|Page 4770