Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual — part 637
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–68
Step
No
Yes
Action
14
1. Turn off the starter switch.
2. Disconnect the ECU connector.
When the transfer lever is shifted to the neutral position, is the
continuity established between terminals (B–48)9 and (B–48)24
(4H switch)?
Go to Step 15
Go to Step 17
15
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 17
Go to Step 16
16
When the transfer lever is shifted to the 4L position, is the
continuity established between terminals (B–48)9 and (B–48)24?
Go to Step 17
The ECU has
failed. Replace
the ECU.
Go to Step 23
17
1. Disconnect the H–17 connector.
When the transfer lever is shifted to the neutral position between
high and 4L, is the continuity established between terminals
(H-17)3 and (B-49)22?
Go to Step 18
Go to Step 20
18
When the transfer lever is shifted to the high position, is the
continuity established between transfer connector terminals
(H-17)3 and (B-49)22?
Go to Step 21
Go to Step 19
19
When the transfer lever is shifted to the 4L position, is the
continuity established between transfer connector terminals
(H-17)3 and (B-49)22?
Go to Step 22
GND is
short-circuited
between
terminals
(B-49)22 and
(H-17)3. Repair
the circuit.
Go to Step 23
20
1. Disconnect the M–27 connector.
When the transfer lever is shifted to the neutral position between
high and 4L, is the continuity established between terminals
(M-27)4 and (M-27)7?
Go to Step 21
Repair the
transfer
assembly.
Go to Step 23
21
1. Disconnect the M–27 connector.
When the transfer lever is shifted to the high position, is the
continuity established between terminals (M-27)4 and (M-27)7?
Repair the
transfer
assembly.
Go to Step 23
Go to Step 22
22
1. Disconnect the M–27 connector.
When the transfer lever is shifted to the 4L position, is the
continuity established between terminals (M-27)4 and (M-27)7?
Repair the
transfer
assembly.
Go to Step 23
GND is
short-circuited
between
terminals (B-48)9
and (M–27)4.
Repair the circuit.
Go to Step 23
23
Check that all the parts are mounted.
Is this step complete?
Repeat the
“Diagnosis Flow”.
Return to Step 23
4B2–69
DRIVE LINE CONTROL SYSTEM (TOD)
Chart D–1
4L switch circuit wires are broken or the battery is short-circuited.
Function of circuit
—
Fail condition
The TOD mode is displayed in the neutral position between high and 4L. When the lever
is shifted to the 4L position, the TOD mode is displayed.
Indicator lamp status
Transfer lever position
4L
Middle between 4L
and High
4WD Auto Switch
D04RY00004
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–70
Step
Action
Yes
No
1
Turn on the starter switch.
When the transfer lever is shifted to the high position, is 12V
observed between terminals 44 and 46 (4L switch)?
Go to Step 2
Go to Step 4
2
When the transfer lever is shifted to the middle position between
4L and High, is 0V observed between terminals 44 and 46 (4L
switch)?
Go to Step 3
Go to Step 4
3
When the transfer lever is shifted to the 4L position, is 0V
observed between terminals 44 and 46 (4L switch)?
The ECU has
failed. Replace
the ECU.
Go to Step 13
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, is 12V
observed between terminals (B–48)22 and (B–48)24 (4L switch)?
Go to Step 5
Go to Step 7
5
When the transfer lever is shifted to the middle position between
4L and High, is 0V observed between terminals (B–48)22 and
(B–48)24 (4L switch)?
Go to Step 6
Go to Step 7
6
When the transfer lever is shifted to the 4L position, is 0V
observed between terminals (B–48)22 and (B–48)24 (4L switch)?
The 4L switch
circuit battery is
short-circuited
between ECU
and transfer.
Repair the circuit
Go to Step 13
Go to Step 7
7
Turn off the starter switch.
When the transfer lever is shifted to the high position, is the
continuity established between terminals (B–48)22 and (B–48)24
(4L switch)?
Go to Step 12
Go to Step 8
8
When the transfer lever is shifted to the middle position between
High and 4L, is the continuity established between terminals
(B–48)22 and (B–48)24 (4L switch)?
Go to Step 9
Go to Step 10
9
When the transfer lever is shifted to the 4L position, is the
continuity established between terminals (B–48)22 and (B–48)24
(4L switch)?
The phenomenon
is not
reproduced.
Refer to
“Troubles
intermittently
observed”.
Go to Step 11
10
1. Disconnect the M–27 connector.
When the transfer lever is shifted to the middle position between
High and 4L, is the continuity established between transfer
connector terminals (M-27)12 and GND?
Wires are broken
between transfer
connector
(M-27)12 and
connector
(B-48)22. Repair
the circuit.
Go to Step 13
Repair the
transfer
assembly.
Go to Step 13
11
When the transfer lever is shifted to the 4L position, is the
continuity established between transfer connector terminals
(M-27)12 and GND?
Wire are broken
between transfer
connector
(M-27)12 and
(B-48)22. Repair
the circuit.
Go to Step 13
Repair the
transfer
assembly.
Go to Step 13
4B2–71
DRIVE LINE CONTROL SYSTEM (TOD)
Step
No
Yes
Action
12
When the transfer lever is shifted to the high position, is the
continuity established between transfer connector terminals
(M-27)12 and GND?
Repair the
transfer
assembly.
Go to Step 13
Wires are broken
between transfer
connector
(M-27)12 and
connector
(B-48)22. Repair
the circuit.
Go to Step 13
13
Check that all the parts are mounted.
Is this step complete?
Repeat the
“Diagnosis Flow”.
Return to Step 13
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