2002 ISUZU AXIOM Service Repair Manual

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Page 465 of 2100

ISUZU AXIOM 2002 Service Repair Manual DRIVE LINE CONTROL SYSTEM (TOD) 4B2±86
Chart D±14L switch circuit wires are broken or the battery circuit is short-circuited.
Function of circuitÐ
Fail conditionWhen the TOD switch is changed to th

Page 466 of 2100

ISUZU AXIOM 2002 Service Repair Manual 4B2±87
DRIVE LINE CONTROL SYSTEM (TOD)
D04R200022

Page 467 of 2100

ISUZU AXIOM 2002 Service Repair Manual DRIVE LINE CONTROL SYSTEM (TOD) 4B2±88
StepActionYe sNo
11. Turn on the starter switch.
2. The car stops, the AT selector is the N position, and the brake
is applied.
When the TOD switch is changed t

DRIVE LINE CONTROL SYSTEM (TOD) 4B2±88
StepActionYe sNo
11. Turn on the starter switch.
2. The car stops, the AT selector is the N position, and the brake
is applied.
When the TOD switch is changed to the TOD (or 2H) position, is
12V observed between terminals 44 and 47 (4L switch)?
Go to Step 2Go to Step 4
21. The car stops, the AT selector is the N position, and the brake
is applied.
When the TOD switch is changed to the 4L position, does the
transfer become the 4L state?
Go to Step 3
Refer to
ªDiagnosis from
symptomº.
3Is 0V observed between the terminal 44 and 47?The ECU has
failed.Replace
the ECU.
Go to
Step 10Go to Step 10
41. The car stops, the AT selector is the N position, and the brake
is applied.
When the TOD switch is changed to the TOD (or 2H) position, is
12V observed between the connector (C±37) terminal 22 and 25?
Go to Step 5Go to Step 6
51. Turn off the starter switch and connect the EUC connector.
2. The car stops, the AT selector is the N position, and the brake
is applied.
When the TOD switch is changed to the 4L position, is 0V
observed between terminals (C±37) 22 and (C±37) 25 (4L
switch)?The phenomenon
is not
reproduced.
Refer to
ªTrouble
intermittently
observedº.
Go to Step 6
61. Turn off the starter switch and connect ECU connector.
2. Turn on the starter switch.
3. The car stops, the AT selector is the N position, and the brake
is applied.
4. Change the TOD switch to the TOD (or 2H) position.
5. After the transfer has changed to the TOD (or 2H) mode, turn
off the starter switch and disconnect the ECU connector
(C±37).
Is there the continuity between the connector (C±37) terminal 22
and 25?
Go to Step 9Go to Step 7
71. Turn off the starter switch and connect the ECU connector.
2. Turn on the starter switch.
3. The car stops, the AT selector is the N position, and the brake
is applied.
4. Change the TOD switch to the 4L position.
5. After the transfer has changed to the 4L mode, turn off the
starter switch.
6. Disconnect the ECU connector.
Is there the continuity between the connector (C±37) terminal 22
and 25?
The phenomenon
is not
reproduced.
Refer to
ªTrouble
intermittently
observedº.
Go to Step 8
81. Turn off the starter switch and connect the ECU connector.
2. Turn on the starter switch.
3. The car stops, the AT selector is the N position, and the brake
is applied.
4. Change the TOD switch to the TOD (or 2H) position.
5. After the transfer has changed to the TOD (or 2H) mode, turn
off the starter switch.
6. Disconnect the transfer connector (A±1).
Is there the continuity between the connector terminal (A±1) 12
and GND?
Repair the
transfer.
Go to
Step 10
Repair the circuit
between (C±37)
22 and (A±1) 12.
Go to
Step 10

Page 468 of 2100

ISUZU AXIOM 2002 Service Repair Manual 4B2±89
DRIVE LINE CONTROL SYSTEM (TOD)
StepNo Ye s Action
91. Turn off the starter switch and connect the connector (A±1).
2. Turn on the starter switch.
3. The car stops, the AT selector is N posit

Page 469 of 2100

ISUZU AXIOM 2002 Service Repair Manual DRIVE LINE CONTROL SYSTEM (TOD) 4B2±90
Chart D±2The 4L switch circuit is short-circuited to GND.
Function of circuitÐ
Fail conditionWhen the TOD switch is changed to the 2H or TOD position, the ind

Page 470 of 2100

ISUZU AXIOM 2002 Service Repair Manual 4B2±91
DRIVE LINE CONTROL SYSTEM (TOD)
D04R200022

Page 471 of 2100

ISUZU AXIOM 2002 Service Repair Manual DRIVE LINE CONTROL SYSTEM (TOD) 4B2±92
StepActionYe sNo
11. The car stops, the AT selector is the N position, and the brake
is applied.
When the TOD switch is changed to the TOD (or 2H) position, is

DRIVE LINE CONTROL SYSTEM (TOD) 4B2±92
StepActionYe sNo
11. The car stops, the AT selector is the N position, and the brake
is applied.
When the TOD switch is changed to the TOD (or 2H) position, is
12V observed between terminals 44 and 47 (4L switch)?
Go to Step 2Go to Step 3
21. The car stops, the AT selector is the N position, and the brake
is applied.
When the TOD switch is changed to the 4L position, is 0V
observed between terminals 44 and 47 (4L switch)?
Refer to ªTrouble
intermittently
observedº.
Go to Step 3
31. The car stops, the AT selector is the N position, and the brake
is applied.
2. Select the TOD switch to the TOD (or 2H) position.
Is there the continuity between the connector (C±37) terminal 22
and 25?
Go to Step 5Go to Step 4
41. Connect the ECU connector (C±37) and turn on the starter
switch.
2. The car stops, the AT selector is the N position, and the brake
is applied.
3. Select the TOD switch to the 4L position.
4. Turn off the starter switch and disconnect the ECU connector
(C±37).
Is there the continuity between the connector (C±37) terminal 22
and 25?
The ECU has
failed.Replace
the ECU.
Go to
Step 9Go to Step 5
51. Connect the ECU connector (C±37) and turn on the starter
switch.
2. The car stops, the AT selector is the N position, and the brake
is applied.
3. Select the TOD switch to the TOD (or 2H) position.
4. Turn off the starter switch and disconnect the connector (H±7).
Is there the continuity between the connector terminal (H±7) 5 and
(C±37) 25?
Go to Step 7Go to Step 6
61. Connect the connector (H±7) and turn on the starter switch.
2. The car stops, the AT selector is the N position, and the brake
is applied.
3. Select the TOD switch to the 4L position.
4. After the transfer has changed to the 4L mode, turn off the
starter switch and disconnect the connector (H±7).
Is there the continuity between the connector terminal (H±7) 5 and
(C±37) 25?
Go to Step 7
GND is
short-circuited
between
terminals (C±37)
2 and (H±7) 5.
Repair the circuit.
Go to
Step 9
71. Connect the connector (H±7) and turn on the starter switch.
2. The car stops, the AT selector is the N position, and the brake
is applied.
3. Select the TOD switch to the TOD (or 2H) position.
4. After the transfer has changed to the TOD (or 2H) mode, turn
off the starter switch and disconnect the connector (A±1).
Is there the continuity between the connector terminal (A±1) 12
and GND?
Repair the
transfer.
Go to
Step 9Go to Step 8

Page 472 of 2100

ISUZU AXIOM 2002 Service Repair Manual 4B2±93
DRIVE LINE CONTROL SYSTEM (TOD)
StepNo Ye s Action
81. Connect the connector (A±1) and turn on the starter switch.
2. The car stops, the AT selector is the N position, and the brake
is applie

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