Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 636
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–64
Step
Action
Yes
No
1
1. Turn on the starter switch.
When the transfer lever is shifted to the high position, is 12V
observed between terminals 31 and 46 (4H switch)?
Go to Step 2
Go to Step 4
2
When the transfer lever is shifted to the 4L position, is 12V
observed between terminals 31 and 46 (4H switch)?
Go to Step 3
Go to Step 4
3
When the transfer lever is shifted to the middle position between
4L and High, is 0V observed between terminals 31 and 46 (4H
switch)?
Replace the
ECU.
Go to Step 14
Go to Step 4
4
1. 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 between 4L
and High, is 12V observed between terminals (B–48)9 and
(B–48)24 (4H switch)?
Go to Step 5
Go to Step 7
5
When the transfer lever is shifted to the middle position, is 0V
observed between terminals (B–48)9 and (B–48)24 (4H switch)?
Go to Step 6
Go to Step 7
6
When the transfer lever is shifted to the 4L position, is 12V
observed between terminals (B–48)9 and (B–48)24 (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
7
Turn off the starter switch.
When the transfer lever is shifted to the middle position between
4L and High, is the continuity established between terminals
(B–48)9 and (B–48)24 (4H switch)?
Go to Step 8
Go to Step 11
8
When the transfer lever is shifted to the high position, is the
continuity established between terminals (B–48)9 and (B–48)24?
Go to Step 11
Go to Step 9
9
When the transfer lever is shifted to the 4L position, is the
continuity established between terminals (B–48)9 and (B–48)24?
The phenomenon
is not
reproduced.
Refer to
“Troubles
intermittently
observed”.
The ECU has
tailed. Replace
the ECU.
Go to Step 14
10
When the transfer lever is shifted to the middle position between
4L and High, is the continuity established between terminals
(M–27)4 and (M–27)7?
The 4H switch
circuit is broken
between ECU
and transfer.
Repair the circuit.
Go to Step 14
Repair the
transfer
assembly.
Go to Step 14
11
When the transfer lever is shifted to the high position, is the
continuity established between transfer connector terminals
(M–27)4 and (M–27)7?
Repair the
transfer
assembly.
Go to Step 14
Go to Step 12
12
When the transfer lever is shifted to the 4L position, is the
continuity established between transfer connector terminals
(B–48)9 and (M–27)7?
Repair the
transfer
assembly.
Go to Step 14
Go to Step 13