Multi-Function Transmission Range Switch, Checking
Special tools and workshop equipment required
- Multimeter VAG1526 or Multimeter VAG1715
- Connector test kit VAG1594
- Wiring diagram
Test Prerequisites
- Respective fuses in fuse box (instrument panel, right) must be OK: Refer to SYSTEM WIRING DIAGRAM
- Control Module with indicator unit in instrument panel insert -J285- must be OK.
- Battery voltage must be at least 11.5 volts.
- All electrical consumers such as, for example, lights and rear window defroster must be switched off.
- Parking brake must be engaged or else daylight driving lights will be switched on.
- Selector lever must be in P position.
- Ground (GND) connections to transmission must be OK.
Function Test
-- Switch ignition on.
-- Depress brake pedal and maintain depressed.
-- Shift into all selector lever positions.
- Selector lever position must correspond to display of Control Module with indicator unit in instrument panel insert -J285-.
-- Switch ignition off.
If selector lever position does not correspond to display of Control Module with indicator unit in instrument panel insert -J285-
-- Check wires according to wiring diagram.
Wiring, Checking
-- Connect test box to control module wiring harness, connect test box for wiring test.
-- Disconnect 10-pin harness connector -arrow 1- to Multi-Function Transmission Range (TR) Switch -F125-.
-- Check wires between test box and 10-pin connector to Transmission Control Module (TCM) for open circuit according to wiring diagram.
Terminal 1+socket 47
Terminal 3 + socket 1
Terminal 4 + socket 2
Terminal 5 + socket 22
Terminal 7 + socket 10
Terminal 9 + socket 36
Terminal 10 + socket 21
Wire resistance: max. 1.5Ω
-- Also check wires for short circuit to each other.
Specified value: ∞ Ω
If no malfunctions are found in wires:
-- Check adjustment of Multi-Function Transmission Range (TR) Switch -F125-, Multi-Function Transmission Range (TR) Switch, removing and installing, adjusting.
-- Check adjustment of selector lever cable:
-- Erase DTC memory of Transmission Control Module (TCM) DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
-- Generate readiness code READINESS CODE .
If no malfunctions are detected in wires and adjustments of selector lever cable and Multi-Function Transmission Range (TR) Switch are OK:
-- Replace Multi-Function Transmission Range (TR) Switch -F125-, Multi-Function Transmission Range (TR) Switch, removing and installing, adjusting.
-- Erase DTC memory of Transmission Control Module (TCM) DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
-- Generate readiness code READINESS CODE .