| Test step |
DTC |
Test scope
|
Test connection
|
Test condition
|
Nominal value
|
Possible cause/Remedy
|
| 1.0 |
  |
Electronic accelerator/cruise control/idle speed control module (N4/1)
Voltage supply
Circuit 87 unfused |
78  (1.37)
79 (1.38) |
|
 76 (1.35)
77 (1.36) |
Ignition: ON |
11-14 V |
Wiring,
 1.1 ,
Base module (N16/1),
DM, Chassis & Drivetrain, Vol. 1, section 1.1.
|
| 1.1 |
|
Ground
Model 124
W16
Models 129, 140
W15
|
|
|
X11/4
3
X11/4
3 |
Ignition: ON |
11-14 V |
Wiring,
Model 124: W16
Models 129, 140: W15 |
| 2.0 |
 |
Electronic accelerator/cruise control/idle speed control actuator (M16/1)
Voltage supply
Reference potentiometer (M16/1r1) and actual value potentiometer (M16/1r2)
|
78 (1.37) |
N4/1
|
12 (2.12) |
Ignition: ON |
4.7-5.3 V
Reference value for table I or II . |
Wiring,
EA/CC/ISC actuator (M16/1),
EA/CC/ISC control module (N4/1). |
| 3.0 |
|
EA/CC/ISC actuator (M16/1)
Reference potentiometer (M16/1r1) signal |
78 (1.37) |
N4/1
|
8 (2.8) |
Ignition: ON
Accelerator pedal position:
Closed throttle
Wide open throttle
|
Table I
columns "a"
column "b" |
Wiring,
EA/CC/ISC actuator (M16/1). |
| 4.0 |
|
EA/CC/ISC actuator (M16/1)
Actual value potentiometer (M16/1r2) signal |
78 (1.37) |
N4/1
|
9
(2.9) |
Ignition: ON
Accelerator pedal position:
Closed throttle
Wide open throttle
|
Table II ,
columns "e"
column"f"
|
Wiring,
EA/CC/ISC actuator (M16/1). |
| 5.0 |
|
EA/CC/ISC actuator (M16/1)
Voltage supply
Safety contact switch (M16/1s1) with closed throttle position switch (M16/1s2)
|
79 (1.37) |
N4/1
|
16 (2.16) |
Ignition: ON
Accelerator pedal position:
Closed throttle |
6 - 10 V
(value jumps) |
Wiring,
EA/CC/ISC actuator (M16/1),
EA/CC/ISC control module (N4/1). |
| 6.0 |
|
EA/CC/ISC actuator (M16/1)
Closed throttle position switch (M16/1s2) switching point |
10 (2.10) |
N4/1
|
12
(2.12) |
Ignition: ON
Accelerator pedal positon:
Closed throttle
Connect second multimeter
|
4.7-5.3 V
Reference value for Table III .
|
Wiring,
EA/CC/ISC actuator (M16/1).
|
| |
|
|
78 (1.37) |
N4/1
|
38 (2.38) |
Accelerator pedal positon:
Closed throttle
Slowly depress accelerator pedal until switch point occurs.
|
Table III ,
column "h"
(value jumps)
Table III ,
column "i"
|
|
| 7.0 |
|
EA/CC/ISC actuator (M16/1)
Safety contact switch (M16/1s1) switching point |
10 (2.10) |
N4/1
|
12 (2.12) |
Ignition: ON
Accelerator pedal positon:
Closed throttle
Connect second multimeter
|
4.7-5.3 V
Reference value for Table III .
|
Wiring,
EA/CC/ISC actuator (M16/1).
|
| |
|
|
78 (1.37) |
N4/1
|
35 (2.35) |
Accelerator pedal positon:
Closed throttle
Slowly depress accelerator pedal until switch point occurs. |
Table III ,
column "k"
Table III ,
column "l"
(value jumps)
|
|
| 8.0 |
|
EA/CC/ISC actuator (M16/1)
Closed throttle position switch (M16/1s2) and safety contact switch (M16/1s1) |
35 (2.35) |
N4/1
|
38 (2.38) |
Ignition: ON
Accelerator pedal position:
Closed throttle
Slowly depress accelerator by hand, until both contact switches are closed (overlap point is immeditaley after closed throttle)
Accelerator pedal position:
Wide open throttle
|
Positive voltage value (value jumps)
<1 V
Negative voltage value (value jumps)
|
Wiring,
EA/CC/ISC actuator (M16/1). |
| 9.0 |
|
EA/CC/ISC actuator (M16/1)
Actuator motor (M16/1m1) resistance
|
21 (2.21)
22 (2.22) |
|
20 (2.20)
41 (2.41) |
Ignition: OFF
Disconnect EA/CC/ISC control module (N4/1).
Accelerator pedal position:
Closed throttle |
<10  |
Wiring,
EA/CC/ISC actuator (M16/1). |
| 10.0 |
|
EA/CC/ISC actuator (M16/1)
Magnetic clutch (M16/1k1) |
19 (2.19) |
N4/1
|
40 (2.40) |
Ignition: ON
|
7.5-10 V
|
Wiring,
EA/CC/ISC actuator (M16/1),
EA/CC/ISC control module (N4/1). |
| 11.0 |
 |
Closed throttle position switch (S29/3)
Voltage supply
|
78 (1.37) |
N4/1
|
66 (1.25) |
Ignition: ON
|
4.0-5.5 V |
Throttle linkage (adjustment or damaged),
Control return spring,
Wiring,
11.1
|
| 11.1 |
|
Closed throttle position switch signal.
|
78 (1.37) |
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),
11.2 |
| 11.2 |
|
Closed throttle position switch
resistance (accelerator pedal)
|
50 (1.9) |
N4/1
|
66 (1.25) |
Ignition: OFF
Disconnect 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). |
| 12.0 |
 |
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),
12.1 ,
EA/CC/ISC control module (N4/1). |
| 12.1 |
|
Resistance |
44 (1.3) |
N4/1
|
45 (1.4) |
Ignition: OFF
Disconnect EA/CC/ISC control module (N4/1).
Ignition: ON
Transmission range:
P
R
N
D
3
2 |
1.4 k
294
28 k
11.3 k
5.9 k
3.1 k
(± 10 %)
|
Wiring,
Starter lock-out/backup lamp
switch (S16/3). |
| 13.0 |
|
EA/CC/ISC control
module (N4/1)
A/C compressor signal |
79 (1.37) |
N4/1
|
57 (1.16) |
Engine: Start
Accelerator pedal position:
Closed throttle
Set temperature selector wheel to MIN and activate blower.
|
<1 V
11-14 V |
Wiring,
Base module (N16/1),
DM, Chassis and Drivetrain, Vol. 1, section 1.1. |
| 14.0 |
Model 140 with M119 only! |
EA/CC/ISC control
module (N4/1)
Engine rpm increase signal from diode matrix (V2) |
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
Blower speed setting 3
Rear window defroster
|
<1 V
11-14 V
11-14 V
11-14 V
11-14 V |
Wiring,
Engine rpm increase signal from diode matrix (V2),
14.1.
DM, Body and Accessories, Vol. 4.1, section 14.1.
|
| 14.1 |
|
Engine rpm increase diode
matrix (V2) (right footwell)
Voltage supply |
W15 |
V2
|
3 |
Ignition: OFF
Ignition: ON
|
<1 V
11-14 V |
Fuse,
Wiring. |
| 15.0 |
  |
EA/CC/ISC control
module (N4/1)
Engine speed (TNA) signal from base module (N16/1) |
78 (1.37) |
N4/1
|
75 (1.34) |
Engine: Start
Accelerator pedal position:
Closed throttle
|
6-12 V |
Base module (N16/1),
DM, Chassis & Drivetrain, Vol. 1, section 1.1. |
| 16.0 |
 |
Left front axle vehicle speed
sensor (L6/1)
Speed signal |
78 (1.37) |
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 & Drivetrain, Vol. 1, sections 5.1, 5.2.
Note:
Upon completion of test, erase DTC's from ABS/ASR control module memory.
|
| 17.0 |
 |
Left rear axle vehicle speed
sensor (L6/3)
Speed signal |
78 (1.37) |
N4/1
|
53 (1.12) |
Lift rear of vehicle.
Ignition: ON
Turn left rear wheel by hand
|
4 - 8 V~ |
Wiring,
L6/3,
ABS/ASR control module (N30/1),
DM, Chassis & Drivetrain, Vol. 1, sections 5.1, 5.2.
Note:
Upon completion of test, erase DTC's from ABS/ASR control module memory.
|
| 18.0 |
|
EA/CC/ISC control
module (N4/1)
Fuel safety shut-off signal to LH-SFI control module (N3/1) |
78 (1.37) |
N4/1
|
48 (1.7) |
Ignition: ON
|
2.0-11 V
(value jumps). |
Wiring,
EA/CC/ISC actuator (M16/1),
EA/CC/ISC control module (N4/1). |
| 19.0 |
|
EA/CC/ISC control
module (N4/1)
Closed throttle position recognition signal to LH-SFI control module (N3/1) |
78 (1.37) |
N4/1
|
65 (1.24) |
Ignition: ON
Accelerator pedal position:
Closed throttle
Accelerator pedal applied
|
 4.8 V
 5.5 V |
Wiring,
EA/CC/ISC actuator (M16/1),
N4/1 |
| 20.0 |
 |
Serial data bus (CAN) |
L |
N4/1x1
|
H |
Ignition: OFF
EA/CC/ISC control module (N4/1) unplugged.
Measure resistance at connector.
|
55-65 |
Wiring,
LH-SFI control module (N3/1),
DM, Engines, Vol. 2, section 3.1,
Ignition control module (N1/2),
DM, Engines, Vol. 2, section 5.2,
ABS/ASR control module (N30/1),
DM, Chassis & Drivetrain, Vol. 1, sections 5.1, 5.2.
|
Printable version
