1 Read ABS control module fault memory.
1. Connect and switch on Porsche System Tester 2.
2. Select vehicle type 911 Carrera (996).
3. Select system ABS 5.3 or ABS/TC 5.3.
4. Read out the fault memory.
2 Check wheel speed sensor with ohmmeter.
1. Remove connector X 2/4.
2. Connect ohmmeter on pin side to pins 16 and 17.
Display: 1.6 - 1.8 kohms
3 Check speed signal with Porsche System Tester 2.
1. Connect and switch on Porsche System Tester 2.
2. Select vehicle type 911 Carrera (996) and system ABS 5.3, menu Actual values, Rear left wheel speed sensor.
3. Raise vehicle at rear left.
4. By hand, turn rear left wheel in driving direction.
The speed must be displayed on the tester.
4 Perform adaptation.
1. Switch on the ignition.
2. Wait one minute.
Do not press the accelerator.
3. Switch off the ignition for at least 10 seconds.
4. Read out the fault memory.
120 Vehicle Speed - Open Circuit
P0501
120 Vehicle speed - open circuit
Diagnosis conditions
- Inertia fuel shutoff
- Engine temperature greater than 30 锟斤拷C
- Engine speed between 1,480 rpm and 2,520 rpm.
Possible fault cause
- Open circuit or short circuit in wire from rear right wheel speed sensor to ABS control module
- Rear right wheel speed sensor faulty
- Pulse wheel for speed sensor damaged or contaminated with brake dust
- Open circuit or short circuit in wire from ABS control module to DME control module
- ABS control module faulty
- DME control module faulty