Checking wires to Transmission Control Module (TCM)

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.

Disconnect 12-pin harness connector at transmission.

Fig 1: Transmission Control Module 12-Pin Connector Terminals

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Check wires between test box and 12-pin connector to Transmission Control Module (TCM) for open circuit according to wiring diagram.

Wire resistance: max. 1.5 Ω

Component	Connector	Test box
Solenoid Valve 1 -N88-	Terminal 1	Socket 67
	Terminal 3	Socket 55
Solenoid Valve 2 -N89-	Terminal 1	Socket 67
	Terminal 4	Socket 54
Solenoid Valve 3 -N90-	Terminal 1	Socket 67
	Terminal 5	Socket 9
Solenoid Valve 4 -N91-	Terminal 1	Socket 67
	Terminal 6	Socket 47
Solenoid Valve 5 -N92-	Terminal 1	Socket 67
	Terminal 7	Socket 56

Component	Connector	Test box
Solenoid Valve 6 -N93-	Terminal 2	Socket 22
	Terminal 8	Socket 58
Solenoid Valve 7 -N94-	Terminal 1	Socket 67
	Terminal 10	Socket 10

Also check wires for short circuit to each other.

Specified value: ∞ Ω

If no malfunctions are found in wires:

Replace circuit board or valve body:

Refer to 38 AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS

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