Preparation for DTC Readout

WARNING! Life threatening injures possible due to vehicle slipping or toppling off while on lift. Prior to lift vehicle completely (wheels still in contact with floor), ensure that the vehicle is centered within the lift columns and lift arm supports are correctly placed unto the vehicle contact points. Control Module Adaption: After the swap of the ESP/SPS/BAS or ESP/BAS control module (N47-5), it is important to perform the adaption procedure, since the control module must learn the values for the steering ratio. See HHT menu. Additionally, after replacing either the ESP/SPS control module (N47-5) or the brake booster (A7/7), it is absolutely necessary to perform an adaption of the ESP/SPS control module (N47-5) as well. The ESP/SPS control module (N47-5) has to learn the values for the BAS solenoid valve (A7/7y1), see HHT menu. 1. Review: 11, 21, 22, 23 (connector connections). 2. Connect Hand-Held Tester (HHT) to data link connector (X11/4) according to connection diagram (see section 0) and read out DTC memory. 3. Ignition: ON The BAS control module is integrated into the ESP control module. Read out DTC memory for the BAS, ETS, ME and ETC systems. The replacement or swap of the ABS Lateral Acceleration sensor (B43) and/or the Rotating Speed Sensor for ESP (B45), requires that a driving test is to be performed, see 11

DTC	Possible cause	Test step/Remedy 1)
-	No fault in system	In case of complaint: 23 (entire test).
	ESP/BAS control module (N47-5) 2)	N47-5
	Battery voltage too low	23 1.0
	Battery voltage too high	23 1.0
	CAN communication overall faulty	Check version coding, 23 31.0
	CAN communication with engine control module (ME-SFI) (N3/10) interrupted.	Check version coding, Read out DTC's from (N3/10), 23 31.0
	CAN communication with transmission control module (N15/3) interrupted.	Read out DTC's from (N15/3).
	CAN communication with BAS control module (N47-5) interrupted 2).	N47-5
	CAN communication with transfer case control module (N78) interrupted.	Read out DTC's from (N78).
	CAN communication with instrument cluster (A1) interrupted.	Read-out DTC memory for instrument cluster (A1).
	Left front axle VSS sensor (L6/1), open circuit Left front axle VSS sensor (L6/1), loose connection Left front axle VSS sensor (L6/1), implausible 2)	23 9.0
	Right front axle VSS sensor (L6/2), open circuit Right front axle VSS sensor (L6/2), loose connection Right front axle VSS sensor (L6/2), implausible 2)	23 10.0
	Left rear axle VSS sensor (L6/3), open circuit Left rear axle VSS sensor (L6/3), loose connection Left rear axle VSS sensor (L6/3), implausible 2)	23 11.0
	Right rear axle VSS sensor (L6/4), open circuit Right rear axle VSS sensor (L6/4), loose connection Right rear axle VSS sensor (L6/4), implausible 2)	23 12.0
	Rotationing speed sensor for ESP (B45), Wiring: Signal, open circuit/short circuit Wiring: Reference, open circuit/short circuit	23 28.0
	Steering angle sensor (N49), Initialization, open circuit/short circuit	Turn steering wheel from lock to lock stop, in order to perform intialization. 23 4.0
	ESP brake pressure sensor 1 (N34/1) or ESP brake pressure sensor 2 (N34/2) Open circuit/short circuit, implausible 2)	23 27.0
	ABS lateral acceleration sensor (B43) Open circuit/short circuit, voltage supply, implausible 2)	23 26.0
	Stop lamp switch (4-pole) (S9/1) Plausibility	23 6.0
	Release switch (BAS) (A7/7s1) Open circuit/short circuit	Readout HHT Actual values, Wiring, A7/7s1
	Release switch (BAS) (A7/7s1) Plausibility	Readout HHT Actual values, Wiring, A7/7s1
	Release switch (BAS) (A7/7s1) Redundency	Readout HHT Actual values, Wiring, A7/7s1
	Membrane travel sensor (BAS) (A7/7b1) Open circuit/short circuit	Readout HHT Actual values, 23 29.0
	Membrane travel sensor (BAS) (A7/7b1) Plausibility	Readout HHT Actual values, 23 29.0
	Membrane travel sensor (BAS) (A7/7b1) Membrane speed	Readout HHT Actual values, 23 29.0
	Stop lamp switch (4-pole) (S9/1) Plausibility	23 6.0
	Brake fluid level switch (S11) open/short circuit	Readout HHT Actual values
	Left front axle solenoid valve (hold) (A7/3y6), short/open circuit	23 14.0
	Left front axle solenoid valve (release) (A7/3y7), short/open circuit	23 15.0
	Right front axle solenoid valve (hold) (A7/3y8), short/open circuit	23 16.0
	Right front axle solenoid valve (release) (A7/3y9), short/open circuit	23 17.0
	Left rear axle solenoid valve (hold) (A7/3y10), short/open circuit	23 18.0
	Left rear axle solenoid valve (release) (A7/3y11), short/open circuit	23 19.0
	Right rear axle solenoid valve (hold) (A7/3y12), short/open circuit	23 20.0
	Right rear axle solenoid valve (release) (A7/3y13), short/open circuit	23 21.0
	Solenoid valves, voltage supply, open or short circuit of wiring	23 1.0, 13.0
	Pressure circuit 1 switchover solenoid valve (A7/3y24), open/short circuit	23 24.0
	Pressure circuit 1 vacuum solenoid valve (A7/3y26), open/short circuit	23 22.0
	Pressure circuit 2 switchover solenoid valve (A7/3y25), open/short circuit	23 25.0
	Pressure circuit 2 vacuum solenoid valve (A7/3y27), open/short circuit	23 23.0
	Solenoid valve (BAS) (A7/7y1) 2), open/short circuit	23 30.0
	High pressure return pump (A7/3m1) short/open circuit, will not shut off, or shuts off too soon.	23 3.0
	BAS version coding improper.	Perform version coding using HHT.
	Brakes overheated	Brakes were momentarily overloaded, erase DTC.
	ESP stop lamp suppression (F1k6) 2)	23 5.0
	Pressurization of system via solenoid valve (A7/7y1) for BAS not possible 2).	Readout DTC for BAS control module, 23 30.0

1) Observe Preparation for Test, see 22. 2) After the swap of the ESP/SPS/BAS or ESP/BAS control module (N47-5), it is important to perform the adaption procedure.