Opel Frontera UBS. Service manual — part 143
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–24
No.
NAME
CONTENTS
1
VIG
Power supply (IG)
2
N.C
Not used
3
4WD OUT
4WD signal output
4
SOL (+)
Electromagnetic solenoid
5
ADC (+)
Axle disconnect output
6
LIGHTING SW
Lighting SW input
7
BRAKE
Brake SW input
8
4H SW
4H SW input
9
4L SW
4L SW input
10
AXEL SW
AXEL SW input
11
ABS IN
Operation signal input
12
TOD SW
TOD SW input
13
DIAG
Self-diagnosis input
14
D-G MAP
D-G MAP recognition input (Only V6 engine)
15
Ref.
Vehicle speed sensor supply
16
N.C
Not used
17
US/JAP
Destination recognition input
18
COM (–)
Vehicle speed sensor GND
19
S-GND
Sensor GND
20
P-GND
Power GND
21
TPS
Throttle position sensor
22
TECH 2
TECH 2 output
23
Rer. Sig
Rear vehicle speed sensor input
24
Frt. Sig
Front vehicle speed sensor input
25
IND.a
4WD disply signal a
26
IND.b
4WD display signal b
27
IND.c
4WD display signal c
28
IND.AUTO
AUTO display output
29
IND Rr
Rear display output
30
CHECK
TOD warning lamp
4B2–25
DRIVE LINE CONTROL SYSTEM (TOD)
Reference
D
Transfer connector pin assignment (connector on the
transfer case)
for inspection of transfer pins.
810RW310
No.
NAME
CONTENTS
1
Ref. (Rer. )
Rear speed sensor reference output
2
Ref. (Frt. )
Front speed sensor reference output
3
SW GND
SW GND
4
4H SW (+)
4H SW plus terminal
5
Rer. (+)
Rear speed sensor plus
6
Frt. (+)
Front speed sensor plus
7
POWER GND
Power GND
8
SOL (+)
Electromagnetic solenoid
9
COM (–) (Rer. )
Rear speed sensor GND
10
COM (–) (Frt. )
Front speed sensor GND
11
NC
Not used
12
4L SW (+)
4L SW plus terminal
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–26
Checking Failed TOD Control Unit Pin
NOTE:
1. Unplug the ECU connector and the pins, unless
otherwise specified.
2. Before removing the ECU, turn off the ignition switch.
3. If the standard values are not observed, check the
pins with other testers.
Check
Pin
No.
Circuit to be
tested
Ignition
Switch
Position
Engine
State
Multimeter
Scale/
Range
Measure
between Pin
Number
Standard Valve
Note
14
D-G MAP
OFF
STOP
W
14, 19
Continuity : OK
(Gasoline)
20
P-GND
OFF
STOP
W
20, 19
Continuity : OK
19
GND
OFF
STOP
W
19, GND
Continuity : OK
8
4H SW
OFF
STOP
W
8, 19
No continuity (high,
4L) and continuity
(N) : OK
9
4L SW
OFF
STOP
W
9, 19
No continuity (high)
and continuity (4L,
N) : OK
10
AXLE SW
ON
RUN
W
10, 19
Continuity : OK
Remove ECU and start the engine. Move
the vehicle forth and back to connect axle
surely.
13
DIAG
OFF
STOP
W
13 (TOD), 8
(DLC Con-
nector)
Continuity : OK
DLC connector terminal 8
25
IND.a
ON
STOP
DCV
25 (+), 19 (–)
8.0
∼
14.5 V
Lighting SW ON : 0V
Lighting SW OFF : 8.0
∼
14.5 V
26
IND.b
ON
STOP
DCV
26 (+), 19 (–)
8.0
∼
14.5 V
27
IND.c
ON
STOP
DCV
27 (+), 19 (–)
8.0
∼
14.5 V
30
CHECK
LAMP
ON
STOP
DCV
30 (+), 19 (–)
8.0
∼
14.5 V
11
ABS IN
ON
STOP
DCV
11 (+), 19 (–)
11.5
∼
14.5 V
15
Ref.
ON
STOP
DCV
15 (+), 19 (–)
5
∼
9 V
Connect ECU
24
Ft.(+)
ON
STOP
DCV
24 (+), 19 (–)
0.7
∼
6 V
Connect ECU (off one tooth of speed
sensor ring) and move the vehicle making
sure of voltage change.
23
Rr.(+)
ON
STOP
DCV
23 (+), 19 (–)
0.7
∼
6 V
Connect ECU (off one tooth of speed
sensor ring) and move the vehicle making
sure of voltage change.
18
COM(-)
ON
STOP
DCV
18 (+), 19 (–)
0V
Connect ECU
1
Vig
ON
STOP
DCV
1 (+), 19 (–)
8
∼
14.5 V
7
BRAKE
OFF
STOP
DCV
7 (+), 19 (–)
8
∼
14.5 V
Press brake pedal
21
TPS
ON
STOP
DCV
21 (+), 19 (–)
0.2
∼
4.6 V
Step on the accelerator pedal and make
sure that voltage changes.
3
4WD OUT
OFF
STOP
W
3, 19
7
∼
12 k
W
Disconnect battery GND terminal
5
ADC(+)
OFF
STOP
W
5, 19
10
∼
30
W
Disconnect battery GND terminal
4
SOL(+)
OFF
STOP
W
4, 19
1.0
∼
5.0
W
Disconnect battery GND terminal
12
TOD SW
ON
STOP
DCV
12 (+), 19 (–)
SW OFF : 0 V
SW ON : 8.0
∼
14.5 V
SW OFF : Contact point open
SW ON : Contact point close
6
LIGHTING
ON
STOP
DCV
6 (+), 19 (–)
SW OFF : 8.0
∼
14.5
V
SW ON : 0 V
28
AUTO INDI
ON
STOP
DCV
28 (+), 19 (–)
TOD : 0 V
2H & 4L : 8.0
∼
14.5
V
Lighting SW ON : 0V
Lighting SW OFF : 8.0
∼
14.5 V
29
RR INDI
ON
STOP
DCV
29 (+), 19 (–)
0 V
17
US/JAP
OFF
STOP
W
17 (+), 19 (–)
No continuity : OK
4B2–27
DRIVE LINE CONTROL SYSTEM (TOD)
Tech 2 Scan Tool
From 98 MY, Isuzu dealer service departments are
recommended to use Tech 2. Please refer to Tech 2 scan
tool user guide.
901RW180
Legend
(1) PCMCIA Card
(2) RS 232 Loop Back Connector
(3) SAE 16/19 Adaptor
(4) DLC Cable
(5) Tech–2
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