Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual — part 638
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–72
Chart D–2
The 4L switch circuit is short-circuited to GND.
Function of circuit
—
Fail condition
The 4L mode is displayed even in the 2H or TOD.
Indicator lamp status
Transfer lever position
High (2H or TOD)
4WD Auto Switch
D04RY00006
4B2–73
DRIVE LINE CONTROL SYSTEM (TOD)
Step
Action
Yes
No
1
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 7
2
When the transfer lever is shifted to the neutral position, is 0V
observed between terminals 44 and 46 (4L switch)?
Go to Step 3
Go to Step 7
3
When the transfer lever is shifted to the 4L position, is 0V
observed between terminals 44 and 46 (4L switch)?
Go to Step 4
Go to Step 7
4
1. Select the 4WD Auto Switch to the 2H position.
Is 12V observed between terminals 17 and 46?
Go to Step 5
The ECU has
failed. Replace
the ECU.
Go to Step 16
5
Is 12V observed between terminals 6 and 46?
Go to Step 6
The ECU has
failed. Replace
the ECU.
Go to Step 16
6
Is 12V observed between terminals 18 and 46?
The phenomenon
is not
reproduced.
Refer to
“Troubles
intermittently
observed”.
The ECU has
failed. Replace
the ECU.
Go to Step 16
7
1. Turn off the starter switch.
2. Disconnect the ECU connector.
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?
Go to Step 8
Go to Step 10
8
When the transfer lever is shifted to the 4L position, is the
continuity established between terminals (B–48)22 and
(B–48)24?
Go to Step 9
Go to Step 11
9
When the transfer lever is shifted to the high position, is the
continuity established between terminals (B–48)22 and
(B–48)24?
Go to Step 12
The ECU has
failed. Replace
the ECU.
Go to Step 16
10
1. Disconnect the H-17 connector.
When the transfer lever is shifted to the middle position between
High and 4L, is the continuity established between terminals
(H-17)6 and (B-48)24?
Go to Step 11
Go to Step 13
11
When the transfer lever is shifted to the 4L position, is the
continuity established between transfer connector terminals
(H-17)6 and (B-48)24?
Go to Step 12
Go to Step 14
12
When the transfer lever is shifted to the high position, is the
continuity established between terminals (H-17)6 and (B-48)24?
Go to Step 15
GND is
short-circuited
between
terminals
(B–48)22 and
(H-17)6. Repair
the circuit.
Go to Step 16
13
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 terminals
(M-27)12 and GND?
Go to Step 14
Repair the
transfer
assembly.
Go to Step 16
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–74
Step
No
Yes
Action
14
1. Disconnect the M-27 connector.
When the transfer lever is shifted to the 4L position, is the
continuity established between terminals (M-27)12 and GND?
Go to Step 15
Repair the
transfer
assembly.
Go to Step 16
15
1. Disconnect the M-27 connector.
When the transfer lever is shifted to the high position, is the
continuity established between terminals (M-27)12 and GND?
Repair the
transfer
assembly.
Go to Step 16
GND is
short-circuited
between
terminals (H–17)6
and (M-27)12.
Repair the circuit.
Go to Step 16
16
Check that all the parts are mounted.
Is this step complete?
Repeat the
“Diagnosis Flow”.
Return to Step 16
4B2–75
DRIVE LINE CONTROL SYSTEM (TOD)
Chart E–1
AXLE switch circuit wires are broken.
Function of circuit
—
Fail condition
Both the TOD and 4L modes are disabled. (The transition status is not removed.)
Indicator lamp status
Transfer lever position
Hight
4L
4WD Auto Switch
D04RY00007
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