Preparation for Test: 1. Fuses for PSE system and PSE control module ok, 2. Battery voltage 11 - 14 V, 3. Unlock vehicle via remote central locking, 4. Ignition: ON 5. Connect the Hand-Held Tester (HHT) to X11/4, according to diagram, see section 0. 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.

DTC	Possible cause	Test step/Remedy 1)
	CAN data line, no communication with PSE control module (A37).	23 1.0 - 8.0, Combination control module (N10-1 or N10-3), PSE control module (A37).
	CAN data line, LOW or combination control module (N10-1 or N10-3).	23 2.0, 4.0, 6.0, 8.0, Combination control module (N10-1 or N10-3).
	CAN data line, High or combination control module (N10-1 or N10-3).	23 3.0, 5.0, 7.0, 8.0, Combination control module (N10-1 or N10-3).
	Lock switch circuit SN1/SN2 from RCL control module (N54) to combination control module (N10-1 or N10-3) - or +.	4.5 23 19.0 - 20.0 4.7 23 25.0 - 26.0
	RHR unlocking switch (S6/1s3), signal > 25 sec.	23 (PSE/RHR) 1.0
	Interior switch (CL) (S6/1s2), signal > 25 sec.	23 (PSE/CL) 1.0
	Remote trunk release switch (S15), signal > 25 sec., -.	23 (PSE/RTR) 1.0
	Central locking - faulty function due to error signal from other consumers or CL pneumatic system leak.	32 PSE/CL 1.0 - 8.0
	Retractable head restraint pneumatic system leak.	32 (PSE/RHR) 1.0 - 3.0
	Multi-contour seat, air pressure or safety time.	32 (PSE/OSB) 1.0 - 4.0
	Manifold vacuum assist, Time > max.	32 (PSE/MVA) 1.0

1) Observe Preparation for Test, see 22.