911 Turbo AWD F6-3600cc 3.6L SOHC Twin Turbo (1997)
Cruise Control Module: Testing and Inspection
Checking the control unit's multiple plug
NOTE: When cruise control malfunctions occur, the first item to be checked is fuse no. 19 in the central electrical system The brake light is protected
by the same fuse.
1. Remove right seat.
2. With the ignition off, remove the multiple plug from the control unit.
3. Connect measuring instrument (voltmeter) to terminal 12 (ground) and terminal 1 (plus) of the multiple plug. Turn ignition on.
Display = battery voltage
4. Connect measuring instrument to terminal 12 and terminal 3.
Display = battery voltage
Press "AUS" key (OFF) on control switch.
Display = 0 volts
5. Connect measuring instrument to terminal 12 and terminal 4.
Display = 0 volts
Press "EIN/BESCHLEUNIGEN" key
(ON/ACCELERATE).
Display = battery voltage
6. Connect measuring instrument to terminal 12 and terminal 6.
Display = 0 volts
Press "AUFNAHME" key (RECORD).
Display = battery voltage
7. Connect measuring instrument to terminal 12 and terminal 8.
Display = 0 volts
Operate brake
Display = battery voltage
8. Connect measuring instrument to terminal 1 (plus) and terminal 14.
Display = battery voltage
Operate clutch (switch interrupts)
Display = 0 volts
9. Connect measuring instrument (oscilloscope) to terminals 12 and 11
Turn left rear wheel manually.
The measuring instrument displays square wave signals.
Continue inspection of cruise control actuator if no faults can be detected.
