Preparation for DTC Readout Connect impulse counter scan tool or Hand-Held Tester (HHT) to data link connector (X11/4) according to connection diagram (see section 0). Yellow wire to socket 7. Note: The Test Program is divided into two groups: Electronic accelerator with ISC Cruise control According to the diagnosis made, troubleshoot by performing only the related test steps in the particular group.

Equipment

Hand-Held Tester 1)

see applicable 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	-
		EA/CC/ISC control module (N4/1) Closed throttle position switch (M16/3s2) Stop lamp switch (S9/1) Safety contact switch (M16/3s1) Cruise control switch (S40) OFF EA/CC/ISC control module (N4/1) Actual value potentiometer (M16/1r2) Starter lock-out/back-up lamp switch (S16/3) (transmission range recognition) Closed throttle position switch (S29/3) Engine speed (TNA) signal Vehicle speed signal (VSS) Safety relay within EA/CC/ISC control module (N4/1) EA/CC/ISC control module (N4/1) Engine harness	EA/CC/ISC control module (N4/1) 23 6.0 -8.0 24 2.0 -3.0 23 7.0 -8.0 24 1.0 (N4/1) 23 12.0 , 13.0 23 17.0 , 24 4.0 23 16.0 23 20.0 23 21.0 , 22.0 , 24 5.0 N4/1 N4/1 Check harness wire insulation.
		Conditions for activation of EA/CC/ISC actuator (M16/1) not fulfilled.	Conditions: Engine: OFF Transmission range: P/N
		Right EA/CC/ISC actuator (M16/3) Reference potentiometer (M16/3r1) (voltage supply) Reference potentiometer (M16/3r1) Actual value potentiometer (M16/3r2) Safety contact switch (M16/3s1) Closed throttle position switch (M16/3s2) Actuator motor (M16/3m1) Magnetic clutch (M16/3k1) Reset not accomplished (actuator adaptation)	23 2.0 -10.0 23 2.0 -11.0 23 3.0 23 4.0 23 7.0 , 8.0 23 6.0 , 8.0 23 9.0 23 10.0 Erase DTC: Ignition: OFF Ignition: ON (for at least 30 seconds). If DTC reappears: EA/CC/ISC actuator (M16/3)
		Cruise control switch (S40)	24 1.0
		Stop lamp switch (S9/1)	24 2.0 , 3.0
		Starter lock-out/backup lamp switch (S16/3)	23 17.0 , 24 4.0
		CAN databus: Message from EA/CC/ISC control module (N4/1) faulty Message from ABS/ASR control module (N30/1) missing Message from left LH-SFI control module (N3/2) missing Message from right LH-SFI control module (N3/3) missing Reception from left ignition control module (knock sensor) (N1/4) faulty Reception from right ignition control module (knock sensor) (N1/5) fault	N4/1 23 27.0 , 24 6.0
		Left front axle vehicle speed signal from ABS/ASR control module (N30/1)	23 21.0 , 24 5.0
		Left rear axle vehicle speed signal from ABS/ASR control module (N30/1)	23 22.0
		Engine speed signal (TNA) from base module (N16/1)	23 20.0
		Fuel safety shut-off signal to left LH-SFI control module (N3/2) Closed throttle recognition signal to left LH-SFI control module (N3/2) Fuel safety shut-off signal to right LH-SFI control module (N3/3)	23 23.0 , 24.0 23 26.0 23 25.0
		Voltage supply, circuit 87	23 1.0
		Left EA/CC/ISC actuator (M16/4) Actual value potentiometer (M16/4r1) Actual value potentiometer (M16/4r2) Actuator motor (M16/4m1) Magnetic clutch (M16/4k1)	23 11.0 - 15.0 23 13.0 23 12.0 23 14.0 23 15.0
		Closed throttle position switch (S29/3)	23 16.0
		Data exchange with ABS/ASR control module (N30/1) implausible	N30/1

1) Observe Preparation for Test, see 22 .