Test scope	Test connection			Test condition	Nominal value	Possible cause/Remedy
1.0		Electronic accelerator/cruise control module (N4/1) Ground connection	N4/1 22 N4/1 23		X4/10 Cir. 30 X4/10 Cir. 30	Ignition: OFF	11 - 14 V 11 - 14 V	Model 124: Ground, battery (W10), Model 129: Ground, component compartment (W16), Open circuit. Model 124: Ground, battery (W10), Model 129: Ground, component compartment (W16), Open circuit.
2.0		Electronic accelerator/cruise control module (N4/1) Voltage supply	22 22	N4/1 N4/1	1 2	Ignition: ON	11 - 14 V 11 - 14 V	Check connector for multi-function block (X30/1) (see 23 , Figure 6). Check X30/1.
3.0		Accelerator pedal position sensor (R25) Potentiometer voltage supply	5	N4/1	9	Ignition: ON Note voltage value.	6.8 - 7.6 V Reference value in column "A" of table "Voltage Values - Accelerator Pedal Position Sensor (R25)"	Open circuit, 7.0 , R25 defective, EA/CC control module (N4/1) defective.
3.1		R25 potentiometer signal	5	N4/1	15	Ignition: ON Closed throttle position "a", Move accelerator pedal to wide open throttle position "b", kickdown position "c"	Voltage values see table "Voltage Values - Accelerator Pedal Position Sensor (R25)" columns "a, b, c"	Open/short circuit, 7.0 , If nominal value is not attained, 3.3
3.2		R25 safety switch switching point	22	N4/1	13	Ignition: ON Closed throttle position	< 1 V	Open/short circuit, 7.0
[3.2]		Connect second multimeter to socket box	5	N4/1	15	Slowly move accelerator pedal until switching point occurs Note voltage value at switching point	11 - 14 V Voltage value see table "Voltage Values - Accelerator Pedal Position Sensor (R25)" column "d"	1.1 , W15 Masse Federdom rechts, Leitungen. Accelerator pedal position sensor (R25) defective.
3.3		R25	1 5 5	N4/1	9 22 15	Ignition: OFF Unplug EA/CC/ISC module (N4/1), Ignition: ON Move accelerator pedal to wide open throttle contact	Voltage must increase to > 9 V	R25 defective
4.0		EA/CC actuator (M16/1) Potentiometer voltage supply	6	N4/1	26	Ignition: ON Note voltage value	6.8 - 7.6 V Reference value in column"B" of table "Voltage Values - Actuator (M16/1)"	Open circuit, 8.0 , EA/CC module(N4/1) defective.
4.1		M16/1, potentiometer signal	6	N4/1	28	Ignition: ON Closed throttle position "e", Move accelerator pedal towide open throttle position "f"	Voltage values see table "Voltage Values - Actuator (M16/1)" columns "e, f"	Open circuit, 8.0 , If nominal value is not attained, 4.4
4.2		M16/1, safety switch switching point	22	N4/1	29	Ignition: ON Closed throttle position	11 - 14 V	Open circuit, 8.0
[4.2]		Connect second multimeter to socket box	6	N4/1	28	Slowly move accelerator pedal until switching point occurs Note voltage value at switching point	< 1 V Voltage values see table "Voltage Values - Actuator (M16/1)" column "g"	EA/CC actuator (M16/1) defective.
4.3		Actuator motor	21	N4/1	3	Ignition: ON Allow control linkage, linkage rod to return to closed throttle position. Move control linkage, linkage rod towards the wide open throttle position.	Voltage must increase (positive (+) value) Indication must change (negative (-) voltage value) Note: The voltage values for engine 104 are the opposite from above.	Open circuit, 4.5 , If nominal values are not obtained, 4.4
4.4		EA/CC actuator (M16/1)	1 6 6	N4/1	26 22 28	Ignition: OFF Unplug electronic accelerator control module (N4/1), Ignition: ON Move accelerator pedal to wide open throttle contact	Voltage must decrease to < 7 V	M16/1 defective.
4.5		EA/CC actuator (M16/1)	21	N4/1	3	Ignition: OFF Unplug N4/1. Ignition: ON Move accelerator pedal to wide open throttle contact	< 10	M16/1 defective.
5.0		Starter lock-out/backup lamp switch (S16/1)	22	N4/1	33	Ignition: ON Selector lever position "P" Selector lever position "R" Fully depress service brake, move accelerator pedal to partial load and shift selector lever from transmission range "P" into "R" and "R" into "P"	< 1 V 11 - 14 V Position of lever on actuator (M16/1) must change.	Open/short circuit. EA/CC module (N4/1) defective.
6.0		Engine systems (MAS) control module (N16)	22	N4/1	30	Engine: Start, at Idle Disconnect test cable 129 589 00 63 00 from vehicle wiring harness.	11 - 14 V Engine must shut off	Open/short circuit Socket 30 is not short circuit protected to ground. EA/CC module (N4/1) defective. Check wiring for correct terminal layout.
7.0		Check if wires are isolated from each other between accelerator pedal position sensor connector (R25x1) and connector for control module (N4/1)	R25x1		R25x1	Ignition: OFF Unplug EA/CC control module, disconnect plug connections for position sensor (R25) and actuator (M16/1). The connector is unlocked by sliding the metal plate in the connector towards the center pin with a screwdriver.	> 500 k	If < 500 k , replace wiring harness.
			1		2
			1		3
			1		6
			1		7
			2		3
			2		6
			2		7
			3		6
			3		7
			6		7
8.0		Check if wires are isolated from each other between actuator connector (M16/1x1) and connector for control module (N4/1)	M16/1x1		M16/1x1	Ignition: OFF Unplug EA/CC control module, disconnect plug connections for position sensor (R25) and actuator (M16/1). The connector is unlocked by sliding the metal plate in the connector towards the center pin with a screwdriver.	> 500 k	If < 500 k , replace wiring harness.
			1		2
			1		3
			1		4
			1		5
			1		6
			1		7
			2		3
			2		4
			2		5
			2		6
			2		7
			3		4
			3		5
			3		6
[8.0]			M16/1x1		M16/1x1	Ignition: OFF Unplug EA/CC control module, disconnect plug connections for position sensor (R25) and actuator (M16/1). The connector is unlocked by sliding the metal plate in the connector towards the center pin with a screwdriver.	> 500 k	If < 500 k , replace wiring harness.
			3		7
			4		5
			4		6
			4		7
			5		6
			5		7
			6		7

Voltage Values - Accelerator Pedal Position Sensor (R25) 1)

"A" Voltage supply Potentiometer V	"a" Voltage at Closed Throttle Position V	"b" Voltage at Wide Open Throttle Position V	"c" Voltage at Kickdown Position V	"d" Voltage at Potentiometer Safety Switch V
6.8	0.50 - 0.56	5.86 - 6.22	5.86 - 6.37	0.86 - 1.13
6.9	0.51 - 0.57	5.95 - 6.32	5.95 - 6.46	0.87 - 1.14
7.0	0.52 - 0.58	6.04 - 6.41	6.04 - 6.55	0.89 - 1.16
7.1	0.53 - 0.58	6.13 - 6.50	6.13 - 6.64	0.90 - 1.17
7.2	0.53 - 0.59	6.21 - 6.59	6.21 - 6.74	0.91 - 1.19
7.3	0.54 - 0.60	6.30 - 6.68	6.30 - 6.83	0.92 - 1.21
7.4	0.55 - 0.61	6.39 - 6.77	6.37 - 6.92	0.94 - 1.22
7.5	0.56 - 0.62	6.48 - 6.86	6.48 - 7.01	0.95 - 1.24
7.6	0.56 - 0.63	6.56 - 6.95	6.56 - 7.11	0.96 - 1.26

Voltage Values - Actuator Potentiometer (M16/1) 1)

"B" Voltage supply Potentiometer V	"e" Voltage at Closed Throttle Position V	"f" Voltage at Wide Open Throttle Position V	"g" Voltage at Potentiometer Safety Switch V
6.8	6.05 - 6.19	0.61 - 0.75	5.35 - 5.68
6.9	6.14 - 6.28	0.62 - 0.76	5.43 - 5.76
7.0	6.23 - 6.37	0.63 - 0.77	5.51 - 5.89
7.1	6.32 - 6.46	0.64 - 0.78	5.59 - 5.93
7.2	6.41 - 6.55	0.65 - 0.79	5.67 - 6.01
7.3	6.50 - 6.64	0.66 - 0.80	5.75 - 6.10
7.4	6.59 - 6.73	0.67 - 0.81	5.82 - 6.18
7.5	6.68 - 6.83	0.68 - 0.83	5.90 - 6.26
7.6	6.76 - 6.92	0.69 - 0.84	5.98 - 6.35

1) The battery voltage must be greater than 11 volts.