Preparation for DTC Readout

DTC readout is no longer possible using the impulse counter scan tool. 1. Connect Hand-Held Tester (HHT) to data link connector (X11/4) according to connection diagram (see section 0). Test cables are not to be hooked up to the HHT while performing function tests. Read out DTC memory from ABS, ASR OR ETS control modules before starting repair procedures. DTC memory must also be read out from ME-SFI and EA control modules on vehicles with ASR. 2. Ignition: ON 3. Read out DTC memory for control modules.

DTC	Possible cause	Test step/Remedy 1)
-	No fault in system	In case of complaint: 23 (entire test).
	Traction system control module (N47)	N47
	Battery voltage too low, circuit 87	23 1.0
	Voltage supply for ASR/ETS/ESP hydraulic unit (A7/3) solenoid valves, short/open circuit	23 5.0 23 2.0
	Battery voltage too high, circuit 87	23 1.0
	CAN communication overall faulty	Wiring.
	CAN communication with EA/CC/ISC control module (N4/1) interrupted	Read out DTC's from (N4/1).
	CAN communication with engine control module (ME-SFI) (N3/10) interrupted	Read out DTC's from (N3/10).
	CAN communication with transmission control module (N15/3) interrupted	Read out DTC's from (N15/3).
	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 11.0
	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 13.0
ETS/ASR: ABS:	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) Left axle VSS sensor (L6), open circuit Left axle VSS sensor (L6), loose connection Left axle VSS sensor (L6), implausible 2)	23 16.0 23 15.0
	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 19.0
	Left front axle VSS sensor (L6/1), implausible 2)	23 11.0
	Right front axle VSS sensor (L6/2), implausible 2)	23 13.0
ETS/ASR: ABS:	Left rear axle VSS sensor (L6/3), implausible 2) Rear axle VSS sensor (L6), implausible 2)	23 16.0 23 15.0
	Right rear axle VSS sensor (L6/4), implausible 2)	23 19.0
	ABS lateral acceleration sensor (B24/2), short/open circuit	23 8.0
	ABS lateral acceleration sensor (B24/2), implausible	23 8.0
	Stop lamp switch (S9/1) short/open circuit S9/1 implausible	Wiring S/91
	Left front axle solenoid valve (hold) (A7/3y6), short/open circuit	23 21.0
	Left front axle solenoid valve (release) (A7/3y7), short/open circuit	23 22.0
	Right front axle solenoid valve (hold) (A7/3y8), short/open circuit	23 23.0
	Right front axle solenoid valve (release) (A7/3y9), short/open circuit	23 24.0
	Left rear axle solenoid valve (hold) (A7/3y10), short/open circuit	23 25.0 23 26.0
	Left rear axle solenoid valve (release) (A7/3y11), short/open circuit	23 27.0 23 28.0
	Right rear axle solenoid valve (hold) (A7/3y12), short/open circuit	23 29.0
	Right rear axle solenoid valve (release) (A7/3y13), short/open circuit	23 30.0
	Switchover/solenoid valve (A7/3y5), short/open circuit	23 31.0
	Master brake cylinder switchover valve (Y61)	23 9.0
	Solenoid valve relay (A7/3k1)	N47
	Solenoid valve relay (A7/3), voltage supply	23 5.0 23 2.0
	Inlet solenoid valve (A7/3y15)	23 32.0
	High pressure return pump (A7/3m1), short/open circuit High pressure return pump (A7/3m1), will not shut off	23 6.0
	VSS sensor implausible 2)	23 11.0, 13.0, 15.0, 16.0, 19.0
	SPS P-valve (Y10)	23 7.0
	ETS/SPS control module (N47-2), not version coded	N47-2
	Brakes overheated	Brakes were momentarily overloaded, erase DTC.
	ASR/SPS (N47-1) OR ME-SFI (N3/10), engine control module, version coding incorrect	N47-1 N3/10
	SPS P-valve (Y10), adjustment data	23 7.0 N47
	Version coding, SPS	N47
	Temperature after engine is turned off	N47

1) Observe Preparation for Test, see 22. 2) Rotor with incorrect tooth count, dirt accumulation on or damaged rotor, incorrect rear axle ratio, wrong wheel or tire size. If DTC appears only after repair work, it was caused by applying the brakes or driving vehicle on a dynamometer, erase DTC.