Service and Testing Procedures
Servotronic Control Module - J236, removing/installingNote
The Cruise Control, Control Module mounts to the same bracket as the Servotronic Control Module.
- remove glove compartment
- disconnect Servotronic Control Module connector
- remove bracket nuts -arrows- and remove bracket with control module
- remove securing screws and remove control module from bracket
- install in reverse order of removal
Servotronic Control Module - J236, checking power supply (B+)
- remove glove compartment, remove connector from Servotronic Control Module - J236
- switch ignition on
- set digital multimeter Fluke 83 to 20V range
- connect multimeter test leads between pins -2- and -7- of Servotronic Control Module connector
^ must be approx. 12V
If specified reading is not obtained,
- check for open circuit in wiring according to wiring diagram, repair as necessary
Wiring between Servotronic Control Module - J236 and Connector station 1, checking
- remove glove compartment and driver's side knee bar
- remove connector from Servotronic Control Module - J236
- remove orange connector (location 9) -arrow- from Connector station 1
- set digital multimeter Fluke 83 to Ohm measuring range
- connect multimeter test leads between pins -8- and -11- of Servotronic Control Module connector
^ must be infinity Ohms (no continuity)
If specified reading is not obtained,
- check for short circuit in wiring according to wiring diagram, repair as necessary
If specified reading is obtained,
- using connector test kit VW 1594, bridge pins -5- and -6- at position 9 (orange connector) of Connector station 1
^ must be 0 Ohms (continuity)
If specified reading is not obtained,
- check for open circuit in wiring according to wiring diagram, repair as necessary
Wiring between Connector station 1 and Servotronic Solenoid Valve -N119, checking
- remove driver's side knee bar
- remove orange connector (location 9) -arrow- from Connector station
- on S4 vehicles, remove hydraulic brake booster (servo), see Repair Group 47
- remove connector from Servotronic Solenoid Valve - N119
- set digital multi meter Fluke 83 to Ohm measuring range
- using connector test kit VW 1594, connect multimeter test leads between pins -1- and -2- of Servotronic Solenoid Valve - N119 connector
^ must be infinity Ohms (no continuity)
Note
For illustration purposes, test is shown with connector removed from vehicle.
If specified reading is not obtained,
- check for open/short circuit in wiring according to wiring diagram, repair as necessary
If specified reading is obtained,
- using connector test kit VW 1594, bridge pins -5- and -6- at position 9 (orange connector) of Connector station 1
^ must be 0 Ohms (continuity)
If specified reading is not obtained,
- check for open/short circuit in wiring according to wiring diagram, repair as necessary
Servotronic Solenoid Valve - N119, checking
- on S4 vehicles, remove hydraulic brake booster (servo)
- remove connector from Servotronic Solenoid Valve -N119
- set digital multi meter Fluke 83 to Ohm measuring range
- using connector test kit VW 1594, connect multimeter test leads between the two pins of Servotronic Solenoid Valve - N119
^ must be 6-12 Ohms
Note
For illustration purposes, test is shown with steering gear removed from vehicle.
If specified reading is not obtained,
- replace Servotronic Solenoid Valve - N119
Servotronic Solenoid Valve - N119 wiring, checking for short circuit to B+
- remove glove compartment
- remove connector from Servotronic Control Module - J236
- set digital multimeter Fluke 83 to Ohm measuring range
- connect multimeter test leads between pins -7- and -8- then between pins -7- and -11- of Servotronic Control Module connector
^ must be infinity Ohms (no continuity) in each case
If specified reading is not obtained,
- check for short circuit in wiring according to wiring diagram, repair as necessary
Servotronic Solenoid Valve - N119 wiring, checking for short circuit to Ground (GND)
- remove glove compartment
- remove connector from Servotronic Control Module - J236
- set digital multimeter Fluke 83 to Ohm measuring range
- connect multimeter test leads between pins -2- and -11- then between pins -2- and -8- of Servotronic Control Module connector.
^ must be infinity Ohms (no continuity) in each case
If specified reading is not obtained,
- check for short circuit in wiring according to wiring diagram, repair as necessary