Checking wires to Engine Control Module (ECM)

WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 2005 Volkswagen GTI, 2004 Volkswagen R32, 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.

Connect test box to control module wiring harness. Refer to Test box, connecting for wiring test

Fig 1: 5-Pin Connector Terminals 1 & 5

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Check wires between test box and 5-pin connector for open circuit according to wiring diagram.

Terminal 2+socket 102

Terminal 3 + socket 94

Terminal 4 + socket 103

Wire resistance: max. 1.5 Ω

Also check wires for short circuit to each other.

Specified value: ∞ Ω

Erase DTC memory of Engine Control Module (ECM). Refer to Diagnostic mode 4: Reset/erase diagnostic data
Generate readiness code. Refer to Readiness code, generating

If no malfunctions are found in the wires and there was voltage between terminal 1 + 5:

Replace Motronic Engine Control Module (ECM) -J220-. Refer to Engine Control Module (ECM), replacing .

Checking secondary resistances

Fig 2: Checking Secondary Resistances At Terminal 4 Between Cylinders

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Check secondary resistances at terminal 4 between

Cyl. 1 + Cyl. 6,

Cyl. 3 + Cyl. 4,

Cyl. 2 + Cyl. 5.

Specified value: 3.6 to 4.4 k Ω

If specified values are not obtained:

Replace Ignition Coil -N152-. Refer to Parts of the ignition (vehicles with engine code AFP), removing and installing , item 7
Erase DTC memory of Engine Control Module (ECM). Refer to Diagnostic mode 4: Reset/erase diagnostic data
Generate readiness code. Refer to Readiness code, generating