LEMON Manuals: Even more car manuals for everyone
Home >> Porsche >> 2003 >> 911 Carrera 4S, Standard >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> Anti-Lock Brake System (Abs) - 5.3 & Abs/TC 5.3 - 911 CARRERA (996) >> Component arrangement (ABS and ABS/TC) >> Function of individual components >> 2. Relay

2. Relay

The solenoid valve relay is actuated by the control module (closes) as soon as the control module receives voltage from the generator (D+ / terminal 61).

As soon as the relay has closed (picked up), battery + (terminal 30) is applied to the valve coils of all solenoid valves of the hydraulic unit.

If the ABS or the TC (ABD) begins controlling, the control module applies negative potential to the appropriate valve coil of the valve to be controlled at the appropriate wheel.

The return pump relay is actuated (with a negative potential) by the control module if required, and closes.

As soon as the relay has closed / picked up, battery + (terminal 30) is applied to the return pump, which then runs.

NOTE: The relays cannot be exchanged.

When replacement is necessary, the complete hydraulic unit must be replaced.

scientia non olet · About LEMON Manuals