911 Turbo AWD F6-3600cc 3.6L SOHC Twin Turbo (1997)
ftlb).
3. If the speed sensor has been removed or replaced due to an ABS fault or ABS / ABD fault, or because of accident repairs, a functional check
should be carried out with the System Tester 9288 - via the Actual Values menu, Speed submenu. Refer to Antilock Brake System, Testing and
Inspection.
New Speed Sensor
The speed sensors for the front and rear axles have been standardized. As of 24.11.1995, the same speed sensor, part No. 993 606 405 00, has been
installed on all four wheels of new vehicles.
Repairs:
The previous speed sensors - part No. 993.606.404.00 for the front axle and 993.606.402.00 for the rear axle - are no longer available.
In case of spare parts requirements, the new speed sensor (part No. 993.606.405.00) is also valid for vehicles manufactured prior to the
aforementioned introduction date.
Important: a mixed configuration on an axle is NOT permissible. In other words, if a previous-model speed sensor, part No. 993.606.404.00
or 993.606.402.00, is replaced with a new speed sensor (part No. 993.606.405.00), both sensors on the axle in question must be replaced!
A mixed compliment with different speed sensors mounted on the front axle than on the rear axle is permissible.
If the previous version is installed together with the new version on the same axle, the different reception sensitivity values can cause the ABS
warning light to light up and thereby can deactivate the ABS function.
DISTINGUISHING CHARACTERISTIC:
Part No. printed on the speed sensor lead.
The statement that the speed sensor for the front axle must not be interchanged with the speed sensor for the rear axle, as otherwise the edge
position of the speed sensor will be offset by 90° with respect to the pulse edge no longer applies to the new speed sensor.
