Preparation for DTC Readout

Connect impulse counter scan tool and/or HHT to data link connector (X11/4) according to connection diagram (see section 0). yellow wire to socket 7

Equipment

Hand-Held Tester (HHT) 1)

see current MBUSA service information in groups 58 and 99

1) Available through the MBUSA Standard Equipment Program.

Diagnostic trouble code (DTC)		Possible cause	Test step/Remedy 1)
		No fault in system	-
		CC/ISC control module (N4/3) Safety contact switch (M16/3s1) Stop lamp switch (S9/1) Cruise control switch (S40) OFF CC/ISC control module (N4/3) Actual value potentiometer (M16/1r2) Starter lock-out/back-up lamp switch (S16/3) (transmission range recognition) Engine speed (TNA) signal Vehicle speed signal (VSS) Safety relay within CC/ISC control module (N4/3) CC/ISC control module (N4/3) Engine harness	N4/3 23 6.0 -8.0 23 17.0 23 2.0 N4/3 23 3.0 , 5.0 23 11.0 23 14.0 23 15.0 , 16.0 N4/3 N4/3 Check harness wire insulation.
		Conditions for activation of CC/ISC actuator (M16/2) not fulfilled.	Conditions: Engine: OFF Transmission range: P/N
		CC/ISC actuator (M16/2) Throttle valve actual valve potentiometer (M16/2r2) Drive actual value potentiometer (M16/2r1) Safety contact switch (M16/2s1) Closed throttle recognition switch (M16/2s2) CC/ISC actuator (M16/2) (voltage supply) Reset not accomplished (actuator adaptation)	23 3.0 -10.0 23 5.0 23 4.0 23 6.0 , 8.0 23 6.0 , 7.0 23 3.0 Erase DTC: Ignition: OFF Ignition: ON (for at least 90 seconds). If DTC reappears: CC/ISC actuator (M16/2)
		Cruise control switch (S40)	23 2.0
		Stop lamp switch (S9/1)	23 17.0
		Not valid for U.S.A. vehicles
		CAN databus: Message from CC/ISC control module (N4/3) faulty Reception from LH-SFI control module (N3/1) faulty	N4/3 23 21.0
		Left front axle vehicle speed signal (L6/1) from ABS control module (N30)	23 15.0
		Rear axle vehicle speed signal (L6) from ABS control module (N30)	23 16.0
		Engine speed signal (TNA) from base module (N16/1)	23 14.0
		Fuel safety shut-off signal to LH-SFI control module (N3/1) Closed throttle recognition signal to LH-SFI control module (N3/1)	23 19.0 23 20.0
		Voltage supply, circuit 87	23 1.0

1) Observe Preparation for Test, see 22 .