Preparation for DTC Readout

1. Review section 0 and 21, 22, 23 2. Connect Hand-Held Tester (HHT) to data link connector (X11/4) according to connection diagram (see section 0). 3. Ignition: ON 4. Read out DTC memory for the ETS, ME-SFI and ETC control modules. 5. Perform nominal/actual values comparison. 6. Perform activations. 7. Follow-up and repair all displayed DTCs. 8. After successful repairs, erase all DTCs. DTC readout is no longer possible using the impulse counter scan tool.

DTC	Possible cause	Test step/Remedy 1)
-	No fault in system	In case of complaint: 23 (entire test).
	ETS/SPS control module (N47-2)	N47-2
	Battery voltage too low, circuit 15	23 1.0
	Battery voltage too high, circuit 15	23 1.0
	CAN communication faulty overall	Wiring, 23 3.0
	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).
	CAN communication with All-Activity control module (AAM) (N10) interrupted	Read out DTC's from (N10).
	CAN communication with Transfer case control module (N78) interrupted	Read out DTC's from (N78).
	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 6.0
	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 7.0
	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 8.0
	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 9.0
	Stop lamp switch (S9/1) short/open circuit S9/1 implausible	Wiring, S/91
	Brake fluid level switch (S11) short/open circuit	Wiring, S/11
	Left front axle solenoid valve (hold) (A7/3y6), short/open circuit	23 11.0
	Left front axle solenoid valve (release) (A7/3y7), short/open circuit	23 12.0
	Right front axle solenoid valve (hold) (A7/3y8), short/open circuit	23 13.0
	Right front axle solenoid valve (release) (A7/3y9), short/open circuit	23 14.0
	Left rear axle solenoid valve (hold) (A7/3y10), short/open circuit	23 15.0
	Left rear axle solenoid valve (release) (A7/3y11), short/open circuit	23 16.0
	Right rear axle solenoid valve (hold) (A7/3y12), short/open circuit	23 17.0
	Right rear axle solenoid valve (release) (A7/3y13), short/open circuit	23 18.0
	Solenoid valves (A7/3), voltage supply	23 10.0 23 2.0
	Pressure circuit 1 switchover solenoid valve (A7/3y24) short/open circuit	23 19.0
	Pressure circuit 1 vacuum solenoid valve (A7/3y26)	23 21.0
	Pressure circuit 2 switchover solenoid valve (A7/3y25) short/open circuit	23 20.0
	Pressure circuit 2 vacuum solenoid valve (A7/3y27) short/open circuit	23 22.0
	High pressure return pump (A7/3m1), short/open circuit High pressure return pump (A7/3m1), will not shut off	23 5.0
	Brakes overheated	Brakes were momentarily overloaded, erase DTC.

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.