Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual — part 103
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–30
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
Unit
Scale/
Range
Measure
between
Pin No.
Standard Value
Note
22
P-GND
OFF
STOP
W
22, 47
Continuity : OK
46
GNDI
OFF
STOP
W
46, 47
Continuity : OK
47
GND 2
OFF
STOP
W
47, GND
Continuity : OK
31
4H SW
OFF
STOP
W
31, 47
No continuity
(high, 4L) : OK
44
4L SW
OFF
STOP
W
44, 47
No continuity
(high) and
continuity (4L) :
OK
42
AXLE SW
ON
RUN
W
42, 47
Continuity(TOD,
4L) : OK
Remove ECU connector and start
the engine. Move the vehicle forth
and back to connect axle surely.
29
DIAG
OFF
STOP
W
29 (TOD),
8 (DLC
Connec-
tor)
Continuity : OK
DLC connector terminal 8
7
IND.A
ON
STOP
DCV
7 (+), 47
(–)
8.0
∼
14.5 V
when the indicator lamp is turned
off.
20
CHECK
TOD
ON
STOP
DCV
20 (+), 47
(–)
8.0
∼
14.5 V
When the indicator lamp is turned
off.
33
ABS IN
ON
STOP
DCV
33 (+), 47
(–)
6.0
∼
11.0 V
12
REF
ON
STOP
DCV
12 (+), 47
(–)
5
∼
9 V
Connect ECU
32
FRT.(+)
ON
STOP
DCV
32 (+), 47
(–)
0.7
∼
6 V
Connect ECU and move the
vehicle (off one tooth of speed
sensor ring) making sure of
voltage change.
45
RR.(+)
ON
STOP
DCV
45 (+), 47
(–)
0.7
∼
6 V
Connect ECU and move the
vehicle (off one tooth of speed
sensor ring) making sure of
voltage change.
13
COM(-)
ON
STOP
DCV
13 (+), 47
(–)
0V
Connect ECU
14
VIG
ON
STOP
DCV
14 (+), 47
(–)
8
∼
14.5 V
34
VB
OFF
STOP
DCV
34 (+), 47
(–)
8.0
∼
14.5 V
37
BRAKE
SW
OFF
STOP
DCV
37 (+), 47
(–)
8
∼
14.5 V
Press brake pedal
15
TPS
ON
STOP
DCV
15 (+), 47
(–)
PWM duty cycle
10%(MAX) – 90
%(MIN)
Step on the accelerator pedal and
make sure that duty cycle
changes.
4B2–31
DRIVE LINE CONTROL SYSTEM (TOD)
Check
Pin
No.
Note
Standard Value
Measure
between
Pin No.
Unit
Scale/
Range
Engine
State
Ignition
Switch
Position
Circuit to be
tested
36
4WD
OUT
OFF
STOP
W
36, 47
7
∼
12 k
W
Disconnect battery GND terminal
11
EMC(+)
OFF
STOP
W
11, 22
1.0
∼
5.0
W
Disconnect battery GND terminal
30
TOD SW
A
ON
STOP
DCV
30 (+), 47
(–)
SW: TOD, 4L: 0
V
SW:2H:8.0
∼
14.5 V
43
TOD
SWB
ON
STOP
DCV
43 (+), 47
(–)
SW: 2H,
TOD:0V
SW: 4L: 8.0
∼
14.5V
40
LIGHT
ON
STOP
DCV
40 (+), 47
(–)
SW OFF : 0 V
SW ON : 8.0
∼
14.5 V
19
IND B
ON
STOP
DCV
19 (+), 47
(–)
8.0
∼
14.5 V
When the indicator lamp is turned
off
8
IND C
ON
STOP
DCV
8 (+), 47
(–)
8.0
∼
14.5 V
When the indicator lamp is turned
off
27
AT POSC
ON
STOP
DCV
27 (+), 47
(–)
ON:D, 3, 2, 1
OFF:PRN
ON:8.0
∼
14.5 V
OFF:0V
41
AT POSB
ON
STOP
DCV
41 (+), 47
(–)
ON:R, N, D, 3
OFF:P, 2, 1
ON:8.0
∼
14.5 V
OFF:0V
28
AT POSA
ON
STOP
DCV
28 (+), 47
(–)
ON:P, R, 3, 2
OFF:N, D, 1
ON:8.0
∼
14.5 V
OFF:0V
2
ENG REV
ON
RUN
ms
2, 47
Waveform
(PWM)
50 ms (1000 rpm)
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–32
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.
901RW257
Legend
(1) PCMCIA Card
(2) SAE 16/19 Adaptor
(3) DLC Cable
(4) Tech 2
4B2–33
DRIVE LINE CONTROL SYSTEM (TOD)
Getting Started
D
Before operating the Isuzu PCMCIA card with the
Tech 2, the following steps must be performed:
1. The Isuzu 02 System PCMCIA card (1) inserts into
the Tech 2 (4).
2. Connect the SAE 16/19 adapter (2) to the DLC cable
(4).
3. Connect the DLC cable to the Tech 2 (4)
4. Mark sure the vehicle ignition is off.
5. Connect the Tech 2 SAE 16/19 adapter to the vehicle
DLC connector.
826R200011
6. The vehicle ignition turns on.
7. Power up the Tech 2.
8. Verify the Tech 2 power up display.
060RW009
Operating Procedure
The power up screen is displayed when you power up the
tester with the Isuzu systems PCMCIA card. Follow the
operating procedure below.
060R100102
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