Vehicle Speed Sensor (VSS) G68 , checking
Special tools, testers and auxiliary items required
- Multimeter
- Wiring diagram
Requirements
- The Vehicle Speed Sensor (VSS) G68 fuse OK.
- The battery voltage must be at least 12.5 Volts.
- All electrical consumers must be switched off.
- The parking brake must be engaged.
- The selector lever must be in the "P" position.
- The Ground (GND) connections to transmission must be OK.
- Ignition switched off.
Test procedure
- Perform a preliminary check to verify the customers complaint. Refer to → Motronic Engine Control Module (ECM) J220 , replacing
Start diagnosis
- Disconnect the Vehicle Speed Sensor (VSS) G68 electrical harness connector - 1 -.
- Check the electrical harness connector for damage, corrosion, loose or broken terminals.
- Repair any damage found to the electrical harness connector.
If the electrical harness connector is not OK:
- Repair the malfunction.
If the electrical harness connector is OK:
Checking wiring
If the manufacturers test box is being used. Perform the following step.
- Install the Adapter - 68 Pin VAG1598/18. Refer to 38 AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS .
If the manufacturers test box is not being used. Perform the following step.
- Remove the Transmission Control Module (TCM) J217. → Transmission Control Module (TCM) J217 , replacing .
- Using a multimeter , check the Vehicle Speed Sensor (VSS) G68 electrical harness connector terminals to the Transmission Control Module (TCM) J217 electrical harness connector T68 terminals for an open circuit.
| Vehicle Speed Sensor (VSS) G68 electrical harness connector terminal | Transmission Control Module (TCM) J217 electrical harness connector T68 terminals or test box sockets |
| 1 | 65 |
| 2 | 20 |
| 3 | 43 |
Specified value: 1.5 Ω Max.
If the specification was not obtained:
- Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).
- If necessary, repair the faulty wiring connection.
If no malfunction is found in the wiring and the resistance was not OK:
- Replace the Vehicle Speed Sensor (VSS) G68. For all Automatic Transmission system removal/installation procedures and torque specifications. Refer to 38 AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS .
If no malfunction is found in the wiring and the resistance was OK:
- Replace the Transmission Control Module (TCM) J217. For all Automatic Transmission system removal/installation procedures and torque specifications. Refer to 38 AUTOMATIC TRANSMISSION - GEARS, HYDRAULIC CONTROLS .
- Erase the DTC memory. Refer to → Diagnostic Mode 04: Reset/delete diagnostic data
- Perform a road test to verify repair.
If the DTC does not return:
Repair complete, Generate readiness code. Refer to → Readiness Code .
- End diagnosis.
If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK:
- Replace the Motronic Engine Control Module (ECM) J220. Refer to → Motronic Engine Control Module (ECM) J220 , replacing .
- Assembly is performed in the reverse of the removal.
Final procedures
- Check the DTC memory. Refer to.
- If necessary, erase DTC memory of the Transmission Control Module (TCM) J217.
- Generate readiness code.
End of diagnosis