1998 ISUZU TROOPER Service Repair Manual

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Page 649 of 3573

ISUZU TROOPER 1998 Service Repair Manual DRIVE LINE CONTROL SYSTEM (TOD) 4B2±78
StepNo Ye s Action
15When the transfer lever is shifted to the high position and 4WD
switch shifted to 4WD position, is 0V observed on each VSV?
Go to Step 16
R

Page 650 of 3573

ISUZU TROOPER 1998 Service Repair Manual 4B2±79 DRIVE LINE CONTROL SYSTEM (TOD)
Chart E±2The AXLE switch circuit is short-circuited to GND.
Function of circuitÐ
Fail conditionEven after the 4WD SW is select to the 2WD position, the 2WD mo

Page 651 of 3573

ISUZU TROOPER 1998 Service Repair Manual DRIVE LINE CONTROL SYSTEM (TOD) 4B2±80
StepActionYe sNo
1Start the engine.
When the transfer lever is shifted to the neutral position between
high and 4L, is 5V observed between terminals 10 and 19?

DRIVE LINE CONTROL SYSTEM (TOD) 4B2±80
StepActionYe sNo
1Start the engine.
When the transfer lever is shifted to the neutral position between
high and 4L, is 5V observed between terminals 10 and 19?
Go to Step 2Go to Step 7
2When the transfer lever is shifted to the high position and 4WD
switch shifted to 4WD position, is 0V observed between terminals
10 and 19?
Go to Step 3Go to Step 7
3When the transfer lever is shifted to the 4L position, is 0V
observed between terminals 10 and 19?
Go to Step 4Go to Step 7
4Select the 4WD SW to the 2WD position.
Is 12V observed between terminals 25 and 19?
Go to Step 5Go to Step 19
5Is 12V observed between terminals 26 and 19?Go to Step 6Go to Step 19
6Is 12V observed between terminals 27 and 19?The phenomenon
is not
reproduced.
Refer to
ªTroubles
intermittently
observedº.
Go to Step 19
The ECU has
failed. Replace
the ECU.
Go to Step 19
7When the 4WD SW is select to the 2WD position, is the battery
voltage observed between terminals 5 and 19?
Go to Step 8Go to Step 11
8When the transfer lever is shifted to the neutral position between
high and 4L, is the battery voltage observed between terminals 5
and 19?
Go to Step 9Go to Step 11
9When the transfer lever is shifted to the high position and 4WD
switch shifted to 4WD position, is 0V observed between terminals
5 and 19?
Go to Step 10Go to Step 11
10When the transfer lever is shifted to the 4L position, is 0V
observed between terminals 5 and 19?
Go to Step 12Go to Step 11
11Is any of the trouble codes 28, 32 and 33 recorded?Examine the
trouble based on
ªDiagnosis from
Trouble Codesº.
Go to Step 19
The ECU has
failed. Replace
the ECU.
Go to Step 19
121. Turn off the starter switch.
2. Disconnect the ECU connector.
Does the resistance between terminals (B±67)5 and (B±67)11
meet the standard, 17< R < 25 ohm?
Go to Step 13
Repair the circuit
or replace the
VSV.
Go to Step 19
131. Connect the ECU connector.
2. Turn on the starter switch.
When the 4WD SW is select to the 2WD position, is the battery
voltage supplied to each VSV?
Go to Step 14
Repair the circuit
or replace the
VSV.
Go to Step 19
14When the transfer lever is shifted to the neutral position between
high and 4L, is the battery voltage supplied to each VSV?
Go to Step 15
Repair the circuit
or replace the
VSV.
Go to Step 19
15When the transfer lever is shifted to the high position and 4WD
switch shifted to 4WD position, is 0V observed on each VSV?
Go to Step 16
Repair the circuit
or replace the
VSV.
Go to Step 19

Page 652 of 3573

ISUZU TROOPER 1998 Service Repair Manual 4B2±81 DRIVE LINE CONTROL SYSTEM (TOD)
StepNo Ye s Action
16When the transfer lever is shifted to the 4L position, is 0V
observed on each VSV?
Go to Step 17
Repair the circuit
or replace the
VSV.
Go

Page 653 of 3573

ISUZU TROOPER 1998 Service Repair Manual DRIVE LINE CONTROL SYSTEM (TOD) 4B2±82
Chart GThe trouble codes are displayed.
Function of circuitÐ
Fail condition
Indicator lamp status
Transfer positionÐ
D04RW056

Page 654 of 3573

ISUZU TROOPER 1998 Service Repair Manual 4B2±83 DRIVE LINE CONTROL SYSTEM (TOD)
StepActionYe sNo
1Disconnect the ECU connector from ECU.
Is the continuity established between terminals (B±68)8 and
(B±67)11?
Go to Step 2
The ECU has
failed

Page 655 of 3573

ISUZU TROOPER 1998 Service Repair Manual DRIVE LINE CONTROL SYSTEM (TOD) 4B2±84
Chart Hlighting switch circuit
Function of circuitReads in the status of lighting switch and reduces the indicator brightness at night.
Fail conditionEven if th

Page 656 of 3573

ISUZU TROOPER 1998 Service Repair Manual 4B2±85 DRIVE LINE CONTROL SYSTEM (TOD)
StepActionYe sNo
11. Disconnect ECU terminal.
2. Turn on the starter switch.
Is battery voltage observed between ECU terminals (B±68)1 and
(B±67)11?
Go to Ste

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