LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Volkswagen >> 2004 >> Touareg 4.2 M >> Repair and Diagnosis >> Engine Performance >> System >> 4.2L - Generic Scan Tool - Engine Code(S): AXQ >> St Generic Scan Tool >> Diagnosis And Testing >> Diagnostic Procedures >> Valve Body Solenoid Valves, Checking
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Valve Body Solenoid Valves, Checking

Special tools and workshop equipment required 

Test requirements 

Test sequence 

-- Disconnect 14-pin harness connector -arrow 2- to solenoid valves (Solenoid Valve 1 -N88- to Solenoid Valve 6 -N93-, Solenoid Valve 9 -N282-, Solenoid Valve 10 -N283-).

Fig 1: Disconnecting 10-Pin Harness Connector To Multi-Function Transmission Range (TR) Switch -F125-
GWWN37-1147Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Checking resistance 

-- Check resistances of solenoid valves at connector to the solenoid valves:

Fig 2: 14-Pin Electrical Harness Connector & Terminals
GWWN37-1148Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
Component Connector Terminal Specified value Ω
Solenoid Valve 1 -N88- 1+Ground (GND) transmission 10.0 to 16.0
Solenoid Valve 2 -N89- 2+Ground (GND) transmission 10.0 to 16.0
Solenoid Valve 3 -N90- 7+8 4.0 to 8.0
Solenoid Valve 4 -N91- 11+12 4.0 to 8.0
Solenoid Valve 5 -N92- 3+4 4.0 to 8.0
Solenoid Valve 6 -N93- 13+14 4.0 to 8.0
Solenoid Valve 9 -N282- 5+6 4.0 to 8.0
Solenoid Valve 10 -N283- 9+10 4.0 to 8.0
NOTE:

Resistance value is valid at approx. 20° C. At higher temperatures, resistance value increases.

If one of the specified values is not obtained:

-- Replace the respective solenoid valve.

-- Erase DTC memory of Transmission Control Module (TCM), Diagnostic mode 4: Reset/erase diagnostic data.

-- Generate readiness code.

If specified values are obtained:

-- Check wires according to wiring diagram.

Checking wiring 

-- Connect test box to control module wiring harness, connect test box for wiring test.

-- Check wires between test box and 14-pin connector to Transmission Control Module (TCM) for open circuit according to wiring diagram.

Component Connector Test box
Solenoid Valve 1 -N88- Terminal 1 Socket 41
Solenoid Valve 2 -N89- Terminal 2 Socket 15
Solenoid Valve 3 -N90- Terminal 7 Socket 30
  Terminal 8 Socket 18
Solenoid Valve 4 -N91- Terminal 11 Socket 5
  Terminal 12 Socket 43
Component Connector Test box
Solenoid Valve 5 -N92- Terminal 3 Socket 42
  Terminal 4 Socket 6
Solenoid Valve 6 -N93- Terminal 13 Socket 31
  Terminal 14 Socket 17
Solenoid Valve 9 -N282- Terminal 5 Socket 16
  Terminal 6 Socket 32
Solenoid Valve 10 -N283- Terminal 9 Socket 4
  Terminal 10 Socket 44

-- Also check wires for short circuit to each other.

Specified value: ∞ Ω

If no malfunctions are found in wires:

-- Replace Transmission Control Module (TCM) -J217- TRANSMISSION CONTROL MODULE, REPLACING .