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Diagnostic Manual, Chassis and Drivetrain,
Volume 1

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LOCATION:    1.1 Base Module   >   23 Electrical Test Program - Test


Electrical Test Program - Test

Test scope
Test connection
Test condition
Nominal value Possible cause/Remedy
1.0   Base module (N16/1)
Voltage supply
Circuit 30



28 29
N16/1




1
1

-


11 - 14 V

Wiring,
Battery (G1).
2.0   Base module (N16/1)
Voltage supply
Circuit 15, unfused


28
N16/1



34

-

Ignition: ON

Ignition: OFF



11 - 14 V

< 1 V
Wiring,
Ignition/starter switch (S2/1).
3.0 Voltage supply (unfused)
for:
Engines 104, 119 LH-SFI
N3/1, N59 (M.Y. 93 Calif. version only)

Engine 120 LH-SFI
N3/3, N59

Engine 119, 120 ME-SFI
N3/10, N3/12


28
N16/1



12

-


11 - 14 V

1.0,
Base module (N16/1).
4.0 Voltage supply (unfused)
for:
Engine 120 LH-SFI
N3/2

Engine 120 ME-SFI
N3/11


28
N16/1



11

-


11 - 14 V

1.0,
Base module (N16/1).
5.0 Voltage supply (fused)
for:
Engine 120 LH-SFI
N3/2, K27/1 or K27/2

Engine 119, 120 ME-SFI
Z7/36


28
N16/1



26



Ignition: ON

Ignition: OFF



11 - 14 V

< 1 V
Fuse (F4 with LH-SFI, F2 with ME-SFI) in base module (N16/1),
2.0,
N16/1.


6.0 Voltage supply (fused)
for:
Engine 104, 119 LH-SFI
A1e26, N3/1, N59 (M.Y. 92 Calif.), K27

Engine 120 LH-SFI
A1e26, N3/3, N59 (M.Y. 92 Calif.), K27/1 or K27/2

Engine 119, 120 ME-SFI
Z7/35


28
N16/1



7



Ignition: ON

Ignition: OFF



11 - 14 V

< 1 V
Fuse (F2 with LH-SFI, F1 with ME-SFI) in base module (N16/1),
2.0,
N16/1.


7.0 Voltage supply (fused)
for:
Engine 104, 119 LH-SFI (09/92 )
K17, K29, Y3/2, Y27, Y49, Y49/1, Y49/2, Y58/1

Engine 120 LH-SFI
N1/4 (06/91 ), Y27/2, Y49/1, Y58/2, Y63

Engine 119, 120 ME-SFI
X35/63


28
N16/1



18



Ignition: ON

Ignition: OFF



11 - 14 V

< 1 V
Fuse (F4 with LH-SFI, F2 with ME-SFI ) in base module (N16/1),
2.0,
N16/1.
8.0 Voltage supply (fused)
for:
Engine 104, 119 LH-SFI
( 08/92)
N1/3 (06/91), K17, K29, Y3/2, Y27, Y49, Y49/1, Y49/2, Y58/1, Y62

Engine 104, 119 LH-SFI (09/92 )
N1/3, Y62

Engine 120 LH-SFI
N1/5 (06/91), K17, Y3/2, Y27/3, Y49/2, Y58/3, Y64

Engine 603
N39, Y27, Y31/1, Y31/4, Y31/6

Engine 119, 120 ME-SFI
X35/63


28
N16/1



38



Ignition: ON

Ignition: OFF



11 - 14 V

< 1 V
Fuse (F2 with LH-SFI, F1 with ME-SFI) in base module (N16/1)
2.0,
N16/1.
9.0   Voltage supply (unfused)
for:
Engine 104, 119, 120
LH-SFI
N4/1



28
28
N16/1





5
6



Ignition: ON

Ignition: OFF



11 - 14 V

< 1 V
2.0,
Base module (N16/1).
10.0 Voltage supply (fused)
for:
N30 or N30/1 or N47-1, N30/2, N47-5, S9/1


28
N16/1



8




Ignition: ON

Ignition: OFF




11 - 14 V

< 1 V
Fuse (F1 with LH-SFI, F3 with ME-SFI) in base module (N16/1)
2.0,
N16/1.
11.0 Voltage supply (fused)
for:
N49/1, N51, N15/1, N15/3, N49, S16/9, S45/1


28
N16/1



27



Ignition: ON

Ignition: OFF



11 - 14 V

< 1 V
Fuse (F3) in base module (N16/1)
2.0,
N16/1.
12.0   Idle speed increase signal
for:
Engine 104, 119, 120
LH-SFI
N4/1

Model 129 with engine 119 ME-SFI
N3/10


28
N16/1



32

Engine: at Idle








10 - 14 V

< 1 V
13.0,
14.0,
N16/1.
13.0   A/C compressor RPM sensor signal (A9/1)


Model 124, 129, 140.0 LH-SFI,
Model 129 with ME-SFI


Model 140.1





40




21



N16/1



N16/1






41





20








34



34
Engine: at Idle














20




41
Model 124, 129
> 0.30 V~


Model 140.0
> 0.04 V~


Model 140.1
> 0.04 V~
13.1
13.1   Resistance

Model 124, 129, 140.0 LH-SFI,
Model 129 with ME-SFI


Model 140.1



40




21

N16/1



N16/1





41





20


Ignition: OFF

Disconnect base module (N16/1) from contact box.


Model 124, 129
530 - 900

Model 140.0
165 - 205

Model 140.1
165 - 205
Wiring,
A9/1.
14.0   A/C "ON" signal
from A/C pushbutton control module (N22)

Model 124, 129, 140.0 LH-SFI,
Model 129 with ME-SFI


Model 140.1





39




40



N16/1



N16/1







1





1

Ignition: ON














11 - 14 V

< 2 V
Wiring,
See DM, Climate Control, Vol. 1, section 3.1 or 3.2, >23.
15.0

A/C compressor electromagnetic
clutch (A9k1)
Voltage supply
Circuit 15

Model 124, 129, 140.0 LH-SFI,
Model 129 with ME-SFI



Model 140.1







28





28





N16/1




N16/1









20





41


Engine: at idle

















11 - 14 V

< 1 V

13.0
15.1
Base module (N16/1).

15.1   Base module (N16/1)
Voltage supply
Circuit 15

Models 124, 129, 140.0 LH-SFI, 140.1
Model 129 with ME-SFI only


28
N16/1



15



Ignition: ON

Ignition: OFF



11 - 14 V

< 1 V
Wiring,
Fuse.

16.0   RPM signal TN or TD (output)
to EA/CC/ISC control module (N4/1) and tachometer (A1p5)

Models 124, 129, 140.0 LH-SFI, 140.1 only


28
N16/1



13



Engine: at Idle



>3 V~
Wiring,
17.0,
Base module (N16/1).
17.0   RPM signal TN (input)
from LH-SFI or ME-SFI control module (N3/1 or N3/3 or N3/10)
Engine 104, 119: N3/1, N3/10
Engine 120: N3/3

Model 140.0 LH-SFI,
Model 129 with ME-SFI
only


30
N16/1



31



Engine: at Idle



>3 V~
Wiring,
N3/1 or N3/3,
N16/1.
18.0   Processed RPM signal TD (input)
from EDS control module (N39)

Model 140.1 only


28
N16/1



18



Engine: at Idle

>2.8 V~
(voltage drops with increased rpm, by approx. 0.5 V, then stabilizies).
Wiring,
N39,
Base module (N16/1).
19.0
Module box blower
motor (M2/2) 1)
Voltage supply

Model 124, 129 only


28
N16/1



19

Engine: at Idle
RPM > 1500 rpm

11 - 14 V
only for approx. 1.5 seconds after reaching > 1500 rpm
Wiring,
17.0,
2.0,
N16/1.
20.0 Kickdown switch (S16/7)
(transmission mode)
Voltage supply

Models 124, 129, 140.0 LH-SFI,
140.1 only


28
N16/1



36



Engine: at Idle

Engine: OFF



11 - 14 V


< 1 V
Wiring,
17.0,
N16/1.
21.0   Diagnostic output

Models 124, 129, 140.0, 140.1 only


28
N16/1



33



Ignition: ON



10 - 14 V
Wiring,
N16/1.
1) Module box blower motor was phased out of production on model 140 starting M.Y. 1994.

Test scope
Test connection
Test condition Nominal value Possible cause/Remedy
22.0   Vehicle speed signal (VSS)
from ABS control module (N30) or ASR control module (N30/1)

Models 124, 129, 140.0 LH-SFI, 140.1 only


28
N16/1



14
Ignition: ON
Raise vehicle
Turn right front wheel at
1 rev./second


>3 V~
Wiring,
ABS DM, Chassis & Drivetrain, Vol. 2, section 6.1 or 6.2
>23
,
ASR DM, Chassis & Drivetrain, Vol. 2, section 5.1 or 5.2
>23.

23.0   A/C compressor cut-out/EGR microswitch (S27/6)

Model 140.1 only


39
N16/1



1


Depress accelerator pedal

Release accelerator pedal


11 - 14 V



< 1 V
Wiring,
S27/6.
24.0   Diagnostic coupling for diagnostics
Voltage supply




28
N16/1



9


Ignition: ON


10 - 14 V
Wiring,
Base module (N16/1).