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). Model 124: yellow wire to socket 14 Models 129, 140, 202: yellow wire to socket 7 Model 210: Only possible with HHT. Note: The Test Program is divided into two sections: Electronic accelerator with ISC Cruise control According to the diagnosis made, troubleshoot by performing only the related test steps in the particular group.

Diagnostic trouble code (DTC)		Possible cause	Test step/Remedy 1)
		No fault in system	-
		EA/CC/ISC control module (N4/1) Safety contact switch (M16/1s1) Stop lamp switch (S9/1) Safety contact switch (M16/1s1) 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	N4/1 23 5.0 , 6.0 23 4.0 23 7.0 24 1.0 N4/1 23 4.0 23 12.0 , 24 3.0 23 11.0 23 14.0 23 15.0 , 16.0 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
		EA/CC/ISC actuator (M16/1) Reference potentiometer (M16/1r1) (voltage supply) Reference potentiometer (M16/3r1) Actual value potentiometer (M16/3r2) Safety contact switch (M16/3s1) Closed throttle position switch (M16/1s2) Actuator motor (M16/1m1) Magnetic clutch (M16/1k1) Reset not accomplished (actuator adaptation)	23 2.0 - 10.0 23 2.0 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 90 seconds). If DTC reappears: EA/CC/ISC actuator (M16/1)
		CC switch (S40)	24 1.0
		Stop lamp switch (S9/1)	24 2.0
		Starter lock-out/backup lamp switch (S16/1) Not applicable to U.S. version vehicles	23 12.0 , 24 3.0
		CAN databus: Message from EA/CC/ISC control module (N4/1) faulty Reception from engine control module (N3/4) faulty	23 20.0 N4/1
		Left front axle VSS (L6/1) from ASR control module (N30/1)	23 15.0
		Models 129, 140, 202, 210: Left rear axle VSS (L6/3) from ASR control module (N30/1) Model 124: Hall-effect speed sensor (B6)	23 16.0 23 17.0
		Engine speed signal (TN) from engine control module (N3/4)	23 14.0
		Fuel safety shut-off signal to engine control module (N3/4) Closed throttle recognition signal to engine control module (N3/4)	23 18.0 23 19.0
		CTP switch (S29/3)	23 11.0
		CAN databus: data exchange with ASR control module (N30/1) implausible	ASR control module (N30/1)

1) Observe Preparation for Test, see 22 .