Control module function: Events

NOTE: The occurrence of particular system errors is stored in the event memory. Furthermore, it is possible to read out the time of the occurrence by means of the "F8" key. The time is shown in minutes. The events stored in the event memory concern components of the instrument cluster and also components of other control modules like PSM or DME. The following system errors are stored in the event memory

NOTE: During diagnosis, ABS failure and PSM failure events are entered into the event memory via communication with the PST2 and the respective warning lights are activated during the automatic control module search. In this case, no fault is present and the event memory is to be erased after completion of the diagnosis.

PROBLEM SYMPTOM CHART - CONTROL MODULE

Tester display	Possible causes	Remedy
Brake fluid	Brake fluid level too low	Check brake fluid level and top up brake fluid if necessary.
Brake distributor	System error or system failure of the PSM control module	Read out PSM fault memory (see ANTI-LOCK BRAKE SYSTEM (ABS/PSM 5.7), DIAGNOSIS - 911 TURBO (996) ).
Oil pressure too low	Oil pressure too low (low oil level). Mechanical fault of the sensor for the oil pressure indicator, oil pump faulty or malfunctions in the oil circuit	Check oil level. Drain oil and check whether the specified oil quantity has been filled. Check sensor for oil pressure indicator
Engine temperature too high	Coolant level too low Malfunction in the coolant circuit	Check coolant level Read out DME fault memory in ECM.
Engine diagnosis	System error or system failure of the DME control module	Read out DME fault memory in ECM.
Valve travel control	System error or system failure of the DME control module	Read out DME fault memory in ECM.
PSM failure	Temporary system failure due to communication with the diagnosis tester System error or system failure of the PSM control module	Read out PSM fault memory (see ANTI-LOCK BRAKE SYSTEM (ABS/PSM 5.7), DIAGNOSIS - 911 TURBO (996) ).
ABS failure	System error or system failure of the PSM control module (ABS components)	Read out PSM fault memory (see ANTI-LOCK BRAKE SYSTEM (ABS/PSM 5.7), DIAGNOSIS - 911 TURBO (996) ).
Brake pad wear	Brake pad wear	Check brake pads
Oil level	Oil level too low	Read out fault memory of instrument cluster
Coolant level	Coolant level too low Faults in the wire from expansion tank to instrument cluster or from ground point 8 to expansion tank	Check coolant level and refill if necessary Check wire from ground point 8 to expansion tank and from expansion tank to instrument cluster and sensor for coolant level.
Failure engine-compartment fan	Failure engine-compartment fan	Read out DME fault memory in ECM memory.