1998 ISUZU TROOPER Service Repair Manual

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Page 633 of 3573

ISUZU TROOPER 1998 Service Repair Manual DRIVE LINE CONTROL SYSTEM (TOD) 4B2±62
StepActionYe sNo
11. Turn on the starter switch.
When the 4WD SW is selected to the 4WD position, is 0 V
observed between terminal 12 and 19?
Go to Step 2
Repai

Page 634 of 3573

ISUZU TROOPER 1998 Service Repair Manual 4B2±63 DRIVE LINE CONTROL SYSTEM (TOD)
Chart B±2The 4WD switch circuit is short to battery.
Function of circuitÐ
Fail conditionEven after the transfer mode is selected from 2H to TOD, the indicator

Page 635 of 3573

ISUZU TROOPER 1998 Service Repair Manual DRIVE LINE CONTROL SYSTEM (TOD) 4B2±64
StepActionYe sNo
1When the 4WD SW is selected to the 4WD position, is 0 V
observed between terminal 12 and 19?
Go to Step 2
Repair the 4WD
SW circuit.
Go to Ste

Page 636 of 3573

ISUZU TROOPER 1998 Service Repair Manual 4B2±65 DRIVE LINE CONTROL SYSTEM (TOD)
Chart C±14H switch circuit wires are broken or the battery is short-circuited.
Function of circuitÐ
Fail conditionWhen the 4WD SW is 4WD mode.
When the lever

Page 637 of 3573

ISUZU TROOPER 1998 Service Repair Manual DRIVE LINE CONTROL SYSTEM (TOD) 4B2±66
StepActionYe sNo
11. Turn on the starter switch.
When the transfer lever is shifted to the high position, is 5V
observed between terminals 8 and 19 (4H switch)?

DRIVE LINE CONTROL SYSTEM (TOD) 4B2±66
StepActionYe sNo
11. Turn on the starter switch.
When the transfer lever is shifted to the high position, is 5V
observed between terminals 8 and 19 (4H switch)?
Go to Step 2Go to Step 4
2When the transfer lever is shifted to the 4L position, is 5V
observed between terminals 8 and 19 (4H switch)?
Go to Step 3Go to Step 4
3When the transfer lever is shifted to the neutral position, is 0V
observed between terminals 8 and 19 (4H switch)?Replace the
ECU.
Go to Step 4
Go to Step 4
41. Turn off the starter switch.
2. Disconnect the ECU connector.
3. Turn on the starter switch.
When the transfer lever is shifted to the high position, is 12V
observed between terminals 8 and 19 (4H switch)?
Go to Step 5Go to Step 7
5When the transfer lever is shifted to the neutral position, is 0V
observed between terminals 8 and 19 (4H switch)?
Go to Step 6Go to Step 7
6When the transfer lever is shifted to the 4L position, is 12V
observed between terminals 8 and 19 (4H switch)?The 4H switch
circuit battery is
short-circuited
between ECU
and transfer.
Repair the circuit.
Go to Step 14
Go to Step 7
7Turn off the starter switch.
When the transfer lever is shifted to the neutral position, is the
continuity established between terminals 8 and 19 (4H switch)?
Go to Step 8Go to Step 10
8When the transfer lever is shifted to the high position, is the
continuity established between terminals 8 and 19?
Go to Step 10Go to Step 9
9When the transfer lever is shifted to the 4L position, is the
continuity established between terminals 8 and 19?
Go to Step 14
The phenomenon
is not
reproduced.
Refer to
ªTroubles
intermittently
observedº.
Go to Step 10
10When the transfer lever is shifted to the neutral position, is the
continuity established between terminals (A±3)4 and (A±3)7?
Go to Step 11
Repair the
transfer
assembly.
Go to Step 14
11When the transfer lever is shifted to the high position, is the
continuity established between transfer connector terminals
(A±3)4 and (A±3)7?Repair the
transfer
assembly.
Go to Step 14
Go to Step 12
12When the transfer lever is shifted to the 4L position, is the
continuity established between transfer connector terminals
(B±68)3 and (A±3)4?Repair the
transfer
assembly.
Go to Step 14
Go to Step 13

Page 638 of 3573

ISUZU TROOPER 1998 Service Repair Manual 4B2±67 DRIVE LINE CONTROL SYSTEM (TOD)
StepNo Ye s Action
13Is the continuity established between transfer terminals (A±3)4
and body?
The ECU has
failed. Replace
the ECU.
Go to Step 14
The harness

Page 639 of 3573

ISUZU TROOPER 1998 Service Repair Manual DRIVE LINE CONTROL SYSTEM (TOD) 4B2±68
Chart C±2The 4H switch circuit is short-circuited to GND.
Function of circuitÐ
Fail conditionWhen the transfer lever is shifted to 4L, the indicator lamp stat

Page 640 of 3573

ISUZU TROOPER 1998 Service Repair Manual 4B2±69 DRIVE LINE CONTROL SYSTEM (TOD)
StepActionYe sNo
1When the transfer lever is shifted to the High position, is 5V
observed between terminals 8 and 19 (4H switch)?
Go to Step 2Go to Step 14
2Whe

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