Preparation for Test: 1. Review C/1, C/2, 11, 12, 20, 21, 22, 31, 32 2. Voltage supply to all control modules and CAN data lines ok, 3. Unlock vehicle via Radio/IR remote central locking, 4. Fuses OK, 5. Battery voltage 11 to 14 V, 6. Connect the Hand-Held Tester (HHT) to X11/4, according to diagram, see section 0, 5. Check for additional DTC's in ATA control module. The DTC memory can only be readout and erased via the HHT. Entry into the DTC memory for DAS is via the HHT display: Functions; Locking systems; Central locking or Remote trunk release; DTC memory. When reading out the DTC's, it is possible that not all DTC's of the systems CL, OSB, MVA, RHR, RTR are located in the PSE control module (A37). DTC's not found in the PSE control module may be found in the Signal pick-up and activation module (SAM) (N10/1) or Lower control field control module (N72). Readout DTC memory and note failure codes. Perform repairs of noted failures as per fault table. Interrupt PSE control module power supply for approx. 3 seconds to erase safety memory. Since the DTC memory has been integrated into the combination control module (N10-1 or N10-3), DTC memory must be erased after replacement of the PSE control module. > resistance too great < resistance too low + short circuit to positive (POS) - short circuit to ground (GND) -//- open circuit Abreviations: PSE: PSE control module SAM: Signal pick-up and activation module UBF: Lower control field control module The above noted abreviations are in the third column of the following DTC memory table in bold type to advise of hints (regarding in which of the control modules the DTC is stored).

DTC		Possible cause	Hints	Test step/Remedy 1)
		RHR unlocking switch (S6/1s3), signal > 25 sec.		See AD80.20-P-6003-01B
		Interior switch (CL) (S6/1s2), signal > 25 sec.		23 (PSE/CL) 1.0
		Remote trunk release switch (N72s15), signal > 25 sec.		See AD80.20-P-6002-03B
		Central locking, drivers door - safety switch time exceeded or pneumatic demand to high.		32 (PSE/CL) 1.0, 32 (PSE/CL) 2.0
		Central locking, fuel filler flap - safety switch time exceeded or pneumatic demand to high .		32 (PSE/CL) 5.0, 32 (PSE/CL) 6.0
		Central locking, passenger door/rear doors - safety switch time exceeded or pneumatic demand to high .		32 (PSE/CL) 3.0, 32 (PSE/CL) 4.0
		Safety switch time for retractable head restraint (RHR) pneumatic demand too high.	PSE	See AD80.20-P-8003-01A
		Safety switch time for orthopedic seat backrest (OSB) pneumatic demand too high.	PSE	See AD80.20-P-8004-01A See AD80.20-P-8004-01B See AD80.20-P-8004-01C See AD80.20-P-8004-01D
		Safety switch time for manifold vacuum assist (MVA) exceeded or pneumatic demand too high.	PSE	See AD80.20-P-8005-01B
		Safety switch time for remote trunk release (RTR) exceeded or pneumatic demand too high.	PSE	See AD80.20-P-8002-01B
		PSE control module (A37)		Replace PSE control module (A37).

1) Observe Preparation for Test, see 22.