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LOCATION:    6.3 Electronic Accelerator - (EA)   >   23 Electrical Test Program - Electronic Accelerator Test


Electrical Test Program - Electronic Accelerator Test

Test step DTC Scope of test

Test connection

Test condition

Nominal value

Possible cause/remedy

1.0 EA/CC/ISC control
module (N4/1)
Voltage supply
Circuit 87 unfused


78 (1.37)

79 (1.38)
N4/1







76
(1.35)

77
(1.36)
Ignition: ON 11 - 14 V Wiring,
1.1 ,
Base module (N16/1),
DM, Chassis and Drivetrain,
Vol. 1, section 1.1
1.1   Ground, output ground, electronics (W15)
(right footwell)
N4/1

78 (1.37)
79 (1.38)







X11/4
3

3

Ignition: ON 11 - 14 V Wiring,
W15.

2.0 Right EA/CC/ISC actuator (M16/3, on left of engine)
Voltage supply
Actuator reference potentiometer (M16/3r1) and throttle valve actual value potentiometer (M16/3r2)


78 (1.37)
N4/1





12 (2.12)
Ignition: ON 4.7 - 5.3 V
Reference value for tables I or II . 		Wiring,
EA/CC/ISC actuator (M16/3),
EA/CC/ISC control module (N4/1).
3.0 Right EA/CC/ISC
actuator (M16/3, on left of engine)
Actuator reference potentiometer (M16/3r1) signal



78 (1.37)
N4/1






8 (2.8)
Ignition: ON
Accelerator pedal position:
Closed throttle position,

Wide open throttle or
Kickdown
Table I ,



column " a "

column " b " 		Wiring,
EA/CC/ISC actuator (M16/3).
4.0 Right EA/CC/ISC
actuator (M16/3, on left of engine)
Actual value potentiometer (M16/3r2) signal


78 (1.37)
N4/1





9 (2.9)
Ignition: ON
Accelerator pedal position:
Closed throttle position,

Wide open throttle or
Kickdown
Table II ,

column " e "

column " f " 		Wiring,
EA/CC/ISC actuator (M16/3),

5.0 Right EA/CC/ISC
actuator (M16/3, on left of engine)
Voltage supply
Safety contact switch (M16/3s1) and closed throttle position
switch (M16/3s2)


79 (1.38)
N4/1






16 (2.16)
Ignition: ON
Accelerator pedal position:
Closed throttle

6 - 10 V
Wiring,
EA/CC/ISC actuator (M16/3),
EA/CC/ISC control module (N4/1).
6.0 Right EA/CC/ISC actuator (M16/3, on left of engine)
Closed throttle position switch (M16/3s2) switching point


10 (2.10)








78 (1.37)
N4/1







N4/1





12 (2.12)





 

38 (2.38)

Ignition: ON
Accelerator pedal position:
Closed throttle

Connect second multimeter.



Accelerator pedal position:
Closed throttle



Slowly depress accelerator pedal until switching point occurs


4.7 - 5.3 V
Reference value for Table III .




Table III ,
column " h "
(value jumps)

Table III ,
column " i " 		Wiring,
EA/CC/ISC actuator (M16/3).
7.0 Right EA/CC/ISC actuator (M16/3, on left of engine)
Safety contact switch (M16/3s1) switching point


10 (2.10)







78 (1.37)
N4/1







N4/1




12 (2.12)







35 (2.35)
Ignition: ON
Accelerator pedal position:
Closed throttle



Connect second multimeter.

Accelerator pedal position:
Closed throttle



Slowly depress accelerator pedal until switching point occurs


4.7 - 5.3 V
Reference value for
Table III.




Table III ,
column " k "
(value jumps)

Table III ,
column " l " 		Wiring,
EA/CC/ISC actuator (M16/3).
8.0 Right EA/CC/ISC
actuator (M16/3, on left of engine)
Closed throttle position switch (M16/3s2) and safety contact switch (M16/3s1)


35 (2.35)
N4/1





38 (2.38)
Ignition: ON
Accelerator pedal position:
Closed throttle


Slowly depress accelerator, so that both contact switches are closed (overlap).


Accelerator pedal position:
Partial or wide open throttle 		Positive voltage value (value jumps)


<1 V






Negative voltage value (value jumps)
Wiring,
EA/CC/ISC actuator (M16/3).





9.0 Right EA/CC/ISC
actuator (M16/3, on left of engine)
Actuator motor (M16/3m1) resistance



21 (2.21)

22 (2.22)
N4/1









20 (2.20)

41
(2.41)
Ignition: OFF
Unplug EA/CC/ISC control module (N4/1)
Accelerator pedal position:
Closed throttle




<10 		Wiring,
EA/CC/ISC actuator (M16/3).
10.0 Right EA/CC/ISC actuator (M16/3, on left of engine)
Magnetic clutch (M16/3k1)


19 (2.19)
N4/1





40 (2.40)
Ignition: ON

7.5 - 10 V
Wiring,
EA/CC/ISC actuator (M16/3),
EA/CC/ISC control module (N4/1).
11.0 Left EA/CC/ISC actuator (M16/4, on right of engine)
Voltage supply
Actual value potentiometers (M16/4r1 and M16/4r2)


79 (1.38)
N4/1




33 (2.33)
Ignition: ON
4.7 - 5.3 V
Reference value for Table II. 		Wiring,
EA/CC/ISC actuator (M16/4),
EA/CC/ISC control module (N4/1).
12.0 Left EA/CC/ISC actuator (M16/4, on right of engine)
Throttle valve actual value potentiometer (M16/4r2) signal


79 (1.38)
N4/1





27 (2.27)
Ignition: ON
Accelerator pedal position:
Closed throttle


Wide open throttle or
Kickdown
Table II ,
column "e"




column "f" 		Wiring,
EA/CC/ISC actuator (M16/4),
EA/CC/ISC control module (N4/1).
13.0 Left EA/CC/ISC actuator (M16/4, on right of engine)
Actual value potentiometer signal (M16/4r1)


79 (1.38)
N4/1





30 (2.30)
Ignition: ON
Accelerator pedal position:
Closed throttle

Wide open throttle or
Kickdown
Table I,
column "a"


column "b" 		Wiring,
EA/CC/ISC actuator (M16/4),
EA/CC/ISC control module (N4/1).
14.0 Left EA/CC/ISC actuator (M16/4, on right of engine)
Actuator motor (M16/4m1)
Resistance


1
(2.1)




2 (2.2)
N4/1




N4/1





3 (2.3)




23
(2.23)
Ignition: OFF
Unplug EA/CC/ISC control
module (N4/1).
Accelerator pedal position:
Closed throttle 		<10 Wiring,
EA/CC/ISC actuator (M16/4).
15.0 Left EA/CC/ISC actuator
(M16/4, on right of engine)
Magnetic clutch (M16/4k1)


4 (2.4)
N4/1





24
(2.24)
Ignition: ON
7.5 - 10 V Wiring,
EA/CC/ISC actuator (M16/4),
EA/CC/ISC control module (N4/1).
16.0 Closed throttle position switch (S29/3)
Voltage supply


79 (1.38)
N4/1





66
(1.25)
Ignition: ON
4 - 5.5 V Wiring,
16.1 ,
EA/CC/ISC control module (N4/1).
16.1   Closed throttle position
switch signal


79 (1.38)
N4/1





50 (1.9)
Ignition: ON
Accelerator pedal position:
Closed throttle

Slowly depress accelerator pedal until switching point occurs.


<1 V


1.0 - 2.25 V 		Wiring,
Closed throttle position
switch (S29/3).
16.2
16.2   Closed throttle position switch resistance


50 (1.9)
N4/1





66 (1.25)
Ignition: OFF
Unplug EA/CC/ISC control module (N4/1).
Accelerator pedal position:
Closed throttle

Accelerator pedal depressed




> 20 k

900 - 1100 		Wiring,
Closed throttle position
switch (S29/3).
17.0 Starter lock-out/backup lamp switch (S16/3)
Transmission range recognition voltage


44 (1.3)
N4/1






45 (1.4)
Ignition: ON
Transmission range:
P
R
N
D
3
2



1.0 V
0.3 V
4.0 V
3.5 V
2.5 V
1.8 V

(± 10%)
Wiring,
Starter lock-out/backup lamp
switch (S16/3),
17.1
EA/CC/ISC control module (N4/1).
17.1   Resistance


44 (1.3)
N4/1





45 (1.4)
Ignition: OFF
Unplug EA/CC/ISC control module (N4/1).
Transmission range:
P
R
N
D
3
2






1400
294
28000
11300
5900
3100

(± 10%)
Wiring,
Starter lock-out/backup lamp
switch (S16/3).
18.0   EA/CC/ISC control
module (N4/1)
A/C compressor signal


79 (1.38)
N4/1






57 (1.16)
Engine: Start
Accelerator pedal position:
Closed throttle

Switch on climate control (A/C compressor) and set temperature wheel to "MIN".



<1 V

9 - 14 V 		Wiring,
Base module (N16/1),
DM, Chassis and Drivetrain, Vol. 1, section 1.1.
19.0

Model 140 only 		EA/CC/ISC control
module (N4/1)
Idle speed increase signal from diode matrix (V2)
(right footwell)


79 (1.38)
N4/1





73 (1.32)
Engine: Start
Accelerator pedal position:
Closed throttle
Switch on the the following consumers individually:

Front seat heaters
Rear seat heaters
Rear window defroster
Blower speed setting 3


<1 V






11 - 14 V
11 - 14 V
11 - 14 V

11 - 14 V 		Wiring,
Diode matrix (V2)
19.1



19.1   Idle speed increase diode matrix (V2) (right footwell)
Voltage supply

W15
V2



3
Ignition: OFF

Ignition: ON
<1 V

11 - 14 V 		Wiring,
Fuse.
20.0 EA/CC/ISC control
module (N4/1)
Engine speed (TNA) signal from base module (N16/1)


79 (1.38)
N4/1





75 (1.34)
Engine: Start
Accelerator pedal position:
Closed throttle
6 - 12 V~ Wiring,
Base module (N16/1),
DM, Chassis and Drivetrain, Vol. 1, section 1.1.
21.0 Left front axle vehicle speed
sensor (L6/1)
Speed signal


79 (1.38)
N4/1




56
(1.15)
Lift front of vehicle.
Ignition: ON
Turn left front wheel by hand. 		4 - 8 V~ Wiring,
L6/1,
ABS/ASR control module (N30/1),
DM, Chassis and Drivetrain,
Volume 2, section 5.2.

Note:
Upon completion of test, erase DTC's from ABS/ASR control module (N30/1) memory.
22.0 Left rear axle vehicle speed
sensor (L6/3)
Speed signal


79 (1.38)
N4/1




53 (1.12)
Lift rear of vehicle.
Ignition: ON
Turn left rear wheel by hand. 		4 - 8 V~ Wiring,
L6/3,
N30/1,
DM, Chassis and Drivetrain, Vol. 2, section 5.2.

Note:
Upon completion of test, erase DTC's from ABS/ASR control module (N30/1) memory.
23.0 EA/CC/ISC control
module (N4/1)
Fuel safety shut-off signal to right LH-SFI control
module (N3/3)


79 (1.38)
N4/1





48 (1.7)
Ignition: ON
2 - 11 V
(value jumps). 		Wiring,
Right EA/CC/ISC actuator (M16/3),
N4/1
24.0 EA/CC/ISC control
module (N4/1)
Fuel safety shut-off signal to left LH-SFI control module (N3/2)


79 (1.38)
N4/1





68 (1.27)
Ignition: ON
2 - 11 V
(value jumps). 		Wiring,
Left EA/CC/ISC actuator (M16/4),
N4/1
25.0   EA/CC/ISC control
module (N4/1)
Closed throttle position recognition signal to right
LH-SFI control module (N3/3)


79 (1.38)
N4/1





65 (1.24)
Ignition: ON

Closed throttle position

Accelerator pedal applied

4.8 V


5.5 V 		Wiring,
N4/1
26.0   EA/CC/ISC control
module (N4/1)
Idle speed recognition signal to left LH-SFI control
module (N3/2)


79 (1.38)
N4/1





64 (1.23)
Ignition: ON
Accelerator pedal position:
Closed throttle

Accelerator pedal depressed


4.8 V


5.5 V 		Wiring,
EA/CC/ISC control module (N4/1).
27.0 Serial data bus (CAN)

"L"
N4/1x1

"H"
Ignition: OFF
EA/CC/ISC control module (N4/1) unplugged.

Measure resistance at connector (see Figure 9).




55 - 65 		Wiring,
LH-SFI control module (N3/2 or N3/3),
DM, Engine, Vol. 2, section 3.2,
Ignition control module (N1/4 or N1/5),
DM, Engine, Vol. 2, section 5.3,
ABS/ASR control module (N30/1),
DM, Chassis and Drivetrain, Vol. 2, section 5.2.

Table I Voltage values - actuator reference potentiometer (M16/3r1) and actual value potentiometer (M16/4r1)

Reference Voltage Supply
Value 		" a "
Accelerator pedal position:
Closed Throttle 		" b "
Accelerator pedal position:
Wide Open Throttle or Kickdown
4.7 V 0.23 V 4.46 V
4.8 V 0.24 V 4.56 V
4.9 V 0.24 V 4.65 V
5.0 V 0.25 V 4.75 V
5.1 V 0.25 V 4.84 V
5.2 V 0.26 V 4.94 V
5.3 V 0.26 V 5.50 V

Table II Voltage values - throttle valve actual value potentiometers (M16/3r2, M16/4r2)

Reference Voltage Supply
Value 		" e "
Accelerator pedal position:
Closed Throttle 		" f "
Accelerator pedal position:
Wide Open Throttle or Kickdown
4.7 V 4.55 V 0.23 V
4.8 V 4.65 V 0.24 V
4.9 V 4.75 V 0.24 V
5.0 V 4.85 V 0.25 V
5.1 V 4.94 V 0.25 V
5.2 V 5.04 V 0.26 V
5.3 V 5.14 V 0.26 V

Table III Voltage values - closed throttle position switch and safety contact switch (M16/3s2 and M16/4s1)

Reference Voltage Supply
Value 		" h "
Closed Throttle Position Switch (closed)
Accelerator pedal position:
Closed Throttle 		" i "
Closed Throttle Position Switch (just opened)
Accelerator pedal position:
Pedal depressed to switch point 		" k "
Safety Contact Switch
(open)
Accelerator pedal position:
Closed Throttle 		" l "
Safety Contact Switch
(just closed)
Accelerator pedal position:
Pedal depressed to switch point
4.7 V 4.12 V 3.49 V 3.49 V 4.12 V
4.8 V 4.21 V 3.57 V 3.57 V 4.21 V
4.9 V 4.30 V 3.64 V 3.64 V 4.30 V
5.0 V 4.39 V 3.72 V 3.72 V 4.39 V
5.1 V 4.48 V 3.79 V 3.79 V 4.48 V
5.2 V 4.56 V 3.86 V 3.86 V 4.56 V
5.3 V 4.65 V 3.94 V 3.94 V 4.65 V
 



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