Checking wiring

WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2005 Volkswagen Jetta, 2005 Volkswagen GTI, 2004 Volkswagen Jetta, 2004 Volkswagen GTI, and 2003 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Test Box V.A.G 1598/31 Connected To Control Module Wiring Harness

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect test box VAG1598/31 to control module wiring harness. Engine control module remains disconnected.

Fig 2: 2-Pin Connector Terminals

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Check wiring between test box and 2-pin connector for open circuit according to wiring diagram.

	G61	G66
Terminal 1+Socket	106	107
Terminal 2+Socket	99	99
Wire resistance: max. 1.5 Ω

Additionally check wires for short to one another.

Specification: ∞Ω

If no wiring malfunction is detected:

Loosen knock sensor and tighten again to 20 Nm.
Perform a test drive again and check knock control specifications on display.

Observe the valid safety precautions when road testing vehicle → Safety precautions .

During the road test the following operating conditions must be fulfilled:

Coolant temperature must exceed 85 ° C.
When the temperature is reached, the operating conditions

Idling

Part throttle

Wide open throttle

Overrun

Must be attained several times.

At wide open throttle the engine speed must exceed 3500 rpm.

Again check control module DTC memory.

If malfunction is still present:

Replace knock sensor(s).
Check DTC Memory, if necessary, repair any malfunctions and then Erase DTC Memory → DTC memory (functions 02 and 05), checking and erasing
Read readiness code → Readiness code, reading . If DTC memory has been erased, readiness code must be generated again:

Engine code AWW, → Readiness code for engine code AWW, generating

Engine code AWP, → Readiness code for engine code AWP, generating